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Physics Questions and Answers October 14, 2019

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Force = ( 2 . 0 N ) + ( 4 . 0 N ) acts on a particle with position vector = ( 5 . 0 m ) + ( 2 . 0 m ) . ( a ) What is the torque on the particle about the origin, in unit - vector notation? = N m ( b ) What is the angle between the directions of and ?

How many joules are needed to change the temperature of 1 gram of water by 1 C ? 4 1 9 0 J 1 kJ 1 J 4 . 1 9 J
How many joules are needed to change the

Let 1 . 0 0 kg of liquid water be converted to steam by boiling at a constant standard atmospheric pressure in a closed system with variable volume. The volume changes from an initial 1 . 0 0 1 0 3 m 3 as a liquid to a final 1 . 6 7 m 3 as steam. For this process find: i . The work done by the system [ 2 marks ] ii . The heat added to the system [

Problem 1 : Polarizers ( 1 0 pts . ) Based on problem 6 3 in OpenStax chapter 1 ( volume 3 ) . A . ( 3 pts . ) Unpolarized sunlight with intensity I 0 is incident on the first filter. What is the intensity of the light coming out of the second filter? B . ( 2 p t s . A third polarizer is now added, also at 4 5 from the second polarizer. What is

Question 2 ( 1 point ) What type of current reverses its direction of flow at regular intervals? Low High Alternating Direct
Question 2 ( 1 point ) What type of current

What is the force on Gamma by Alpha? Give the magnitude of the force in N ( N is read "microNewtons" and designates 1 0 6 6 N ) .

at what displacement of a single harmonic oscillator are the potential and kinetic energy equal to each other? A is the amplitude of the oscillator

A pipe 5 0 cm in diameter carries water ( 1 0 )

A spaceship is projected vertically upward from the Earth's surface with an initial speed of 6 . 2 6 km / s , but unfortunately does not have a great enough speed to escape Earth's gravity. What maximum height does the spaceship reach ( in m ) ? Ignore air resistance. m ( b ) A meteoroid falls from a height of 1 . 6 1 1 0 7 m above the surface of

A mass m = 4 . 8 kgm = 4 . 8 kg is at the end of a horizontal spring of spring constant k = 4 2 5 N / mk = 4 2 5 N / m on a frictionless horizontal surface. The block is pulled, stretching the spring a distance A = 7 . 5 cmA = 7 . 5 cm from equilibrium, and released from rest. Write an equation for the angular frequency of the oscillation in terms

The vibration frequencies of atoms in solids at normal temperatures are of the order of 1 0 1 3 Hz . Imagine the atoms to be connected to one another by springs. Suppose that a single silver atom in a solid vibrates with this frequency and that all the other atoms are at rest. Compute the effective spring constant. One mole of silver ( 6 . 0 2 ( 1

A thin metal bar has a density of 7 8 6 0 kg / m 3 . It is 0 . 9 2 5 m long and resonates in its fundamental frequency of 2 7 0 0 Hz when clamped in the middle. What is the bulk modulus for this metal bar? Choose the closest. a ) 2 x 1 0 8 N / m 2 b ) 2 x 1 0 9 N / m 2 c ) 2 x 1 0 1 0 N / m 2 d ) 2 x 1 0 1 1 N / m 2 e ) 2 x 1 0 1 2 N / m

A photon has momentum of magnitude 8 . 1 4 1 0 2 8 kg m / s 8 . 1 4 1 0 2 8 kg m / s . Part A What is the energy of this photon? Give your answer in joules. Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the

Isn't the moment of inertia calculated in Step 2 ( 1 / 1 2 ml ^ 2 ) only for rotation about the center? Shouldn't it be 1 / 3 ml ^ 2 since it is rotating about its end?

What is the weight of a solid gold rectangular bar that has dimensions of 4 . 5 0 cm x 1 1 . 0 cm x 2 6 . 0 cm ?

A 1 0 g bullet traveling at \ ( 4 2 0 \ mathrm { ~m } / \ mathrm { s } \ ) strikes a 9 . 0 kg , \ ( 0 . 8 0 - \ mathrm { m } \ ) - wide door at the edge opposite the hinge. The bullet embeds itself in the door, causing the door to swing open. Part A What is the angular velocity of the door just after impact? Express your answer with the
A 1 0 g bullet traveling at \ ( 4 2 0 \ mathrm {

2 ) At one instant, force 4 . 0 j NF = acts on a 0 . 2 5 kg object that has position vector ( ) 2 . 0 i 2 . 0 k mr = and velocity vector ( ) 5 . 0 i 5 . 0 k m / sv = + . About the origin and in unit - vector notation, what are ( a ) the object s angular momentum and ( b ) the torque acting on the object?

Write the equations for the electric and magnetic fields as functions of x and t . E = ( 3 0 0 V / m ) sin [ ( 4 . 4 7 1 0 1 5 rad / s ) t + ( 1 . 4 9 1 0 7 rad / m ) x ] B = ( 1 . 0 0 T ) sin [ ( 4 . 4 7 1 0 1 5 rad / s ) t + ( 1 . 4 9 1 0 7 rad / m ) x ] E = ( 3 0 0 V / m ) sin [ ( 4 . 4 7 1 0 1 5 rad / s ) t + ( 1 . 4 9 1 0 7 rad / m ) x ] B =

H 2 ) The radius of gyration of a body about a given axis is \ ( R _ { g } = \ sqrt { I / m } \ ) , where \ ( I \ ) is the moment of inertia about the axis and \ ( m \ ) is the total mass of the body. Use integration to a ) find the radius of gyration of a solid ball of radius \ ( R \ ) and constant density \ ( \ rho \ ) about any axis that goes
H 2 ) The radius of gyration of a body about a

Question 8 : A ) Define Impulse. It is safer to hit the break - failed running car at the snow pile than the brick wall. Explain why.
Question 8 : A ) Define Impulse. It is safer to

Which of the following is NOT electromagnetic radiation? Radio waves Gravitational waves Gamma rays X rays
Which of the following is NOT electromagnetic

Figure 3 . 6 B ) . A 1 . 2 - k g spring - activated toy bomb slides on a smooth surface along the x - axis with a speed of 0 . 5 0 m s . At the origin 0 , the bomb explodes into two fragments. Fragment 1 has a mass of 0 . 4 0 kg and a speed of 0 . 9 0 m s along the negative y - axis. The velocity vector of fragment 2 makes an angle with the
Figure 3 . 6 B ) . A 1 . 2 - k g spring -

The oxygen molecule has a . mass of 5 . 3 0 1 0 - 2 6 k g and a moment of inertia of 1 . 9 4 1 0 - 4 6 k g m 2 about an axis through its centre perpendicular to the lines joining the two atoms. Suppose the mean speed of such a molecule in a gas is 5 0 0 m s and that its kinetic energy of rotation is two thirds of its kinetic energy of translation.
The oxygen molecule has a . mass of 5 . 3 0 1 0 -

As a function of time, the electric current flowing out of a volume surrounded by closed surface is given by ( ) = ( , ) where ( , ) is the current density in at time , and points out of . Also, if is the total charge in , then ( ) = since a charge that flows out of in time depletes inside by ( assuming charge is conserved ) . ( a ) Show that the

In the figure a 1 5 V battery is connected across capacitors of capacitances C 1 = C 6 = 5 . 0 F and C 3 = C 5 = 1 . 5 C 2 = 1 . 5 C 4 = 5 . 5 F . What are ( a ) the equivalent capacitance C e q of the capacitors and ( b ) the charge stored by C e q ? What are ( c ) v v 1 and ( d ) q 1 of capacitor 1 , ( e ) V 2 and ( f ) q 2 of capacitor 2 , and
In the figure a 1 5 V battery is connected across

Match the correct description with the name of the device. Stores Energy in Magnetic Filed Stores Energy by accumulating Electric Charge Manipulates electric current in a circuit
Match the correct description with the name of

Could you actually draw the final result with all the figures labeld

[ 0 / 1 Points ] SERCP 1 1 9 . 7 . P . 0 4 2 . Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1 . 7 0 1 0 5 P a and the pipe radius is 2 . 9 0 cm . At the higher point located at y = 2 . 5 0 m , the pressure is 1 . 2 3 1 0 5 P a and the pipe radius is 1 . 2 0 cm . ( a )
[ 0 / 1 Points ] SERCP 1 1 9 . 7 . P . 0 4 2 .

A bag containing 0 degC ice is much more effective in absorbing energy than one containing the same amount of 0 degC liquid water. a . How much heat transfer is necessary to raise the temperature of mass m of liquid water from 0 degC to 3 0 degC? b . How much heat transfer is required to first melt mass mbf 0 degC ice and then raise its
A bag containing 0 degC ice is much more

Problem 1 NASA is launching a rocket for the Mars mission. At the time of launch, the rocket has a total mass of \ ( M = 2 . 8 \ times 1 0 ^ { 6 } \ mathrm { ~kg } \ ) , which includes \ ( 2 . 0 \ times 1 0 ^ { 6 } \ mathrm { ~kg } \ ) of fuel. To lift the rocket, the engines expel exhaust gases backward with an exhaust speed of \ ( v _ { \ mathrm
Problem 1 NASA is launching a rocket for the Mars

An amoeba has 1 . 1 1 0 1 6 protons and a net charge of 1 . 8 pC . How many fewer electrons are there than protons?

Ruestion 6 ( 7 points ) A person applies a constant force of 2 0 N to a rock of mass 1 0 0 0 kg , for a total of 2 0 seconds. What is the work done by this person if the rock does not move at all by this applied force? 2 0 0 0 J 2 0 , 0 0 0 J . 1 0 0 0 J 4 0 0 J 0 1
Ruestion 6 ( 7 points ) A person applies a

What is the period of a pendulum consisting of a 6 . 0 0 - k g mass hanging from a 3 . 3 7 - m - long string? s
What is the period of a pendulum consisting of a

In the nuclear fission reaction: n + 2 3 5 U yields 8 8 Sr + 1 3 6 Xe + ? n Part ( a ) How many neutrons are produced?

What happens to the force of gravitational attraction between two small objects if the mass of each object is doubled and the distance between their centers is doubled? A . It is doubled B . It is quadrupled C . It is halved D . It remains the same C . 2 T D . 4 T

a magnetic field of 2 T is applied to a bubble chamber to make the tracks of protons and other charged particles

what is the frequency in the equation v = 3 5 V sin ( 5 0 0 t )

If on planet TT the sun was green, then on a cold day to stay warm outdoors you should wear _ _ _ _ Group of answer choices magenta yellow

What is the net force on a 2 0 N book falling freely? a . 0 b . 1 0 N c . 2 0 N d . 1 0 0 N e . None of these
What is the net force on a 2 0 N book falling

By what estimated percentage do adult energy needs decline per decade? a . 2 0 b . 8 c . 1 0 . d . 5 . e . 1 2 .
By what estimated percentage do adult energy

A transverse wave has a frequency of = 7 8 . 5 Hz and a wavelength of = 1 3 . 5 m . The wave obtains a maximum displacement of ym = 2 . 6 m and propagates in the - x direction. jwb 1 1 0 @uakron.edu 7 O 7 2 - F 4 - AE - 4 F - B 9 7 8 - 4 4 5 5 8

Earth is about 2 8 , 0 0 0 light years from the center of the Milky Way Galaxy. If a supernova explosion occurred approximately 1 4 , 0 0 0 light years away from us and released 2 . 0 1 0 4 6 J of energy in a sudden burst of light, how much energy would enter one of your pupils? Assume the diameter of a pupil to be about 4 mm . ( For comparison,

In this problem assume that all gas volumes are measured at a temperature 3 2 0 K and a pressure of 1 2 0 kPa Find an expression for the number of moles in the hydrogen sample

The triangle ( percussion instrument ) plays in Section 7 of Copland's Appalachian Spring. True False
The triangle ( percussion instrument ) plays in

1 8 . 1 5 How many moles of an ideal gas exert a gauge pressure of 0 . 8 7 6 atm in a volume of 5 . 4 3 L at a temperature of 2 2 . 2 C ?

Spectral ines from Galaxy B are redshifted from their rest wavelengths twice as much as the speciral lines from Galasy in accurding to Hubbles lime who can you say about their apprazimale relatine distances? A . Galaxy A is tw ce as far as Galaty B . B . Galaxy B is tour umes as far as Gwisxy A . C . Galaxy A is four times as far ac Galaxy if . D
Spectral ines from Galaxy B are redshifted from

Percent error = t - 1 5 3 / 1 5 3 x 1 0 0 % t = 1 5 9 . 3 4

Monochromatic light is incident on a metal surface, and electrons are ejected. If the intensity of the light increases, what will happen to the maximum energy of the electrons?

The wave function for a traveling wave on a taut string is ( in SI units ) ( a ) What are the speed and direction of travel of the wave? ( b ) What is the vertical position of an element of the string at = 0 , = 0 . 1 0 0 ? What are ( c ) the wavelength and ( d ) the frequency of the wave? ( e ) What is the maximum transverse speed of an element

An 1 0 kg mass experiences the force on the right. What is the change in velocity of the mass if the force F is 3 2 9 N and the amount of time the force acts on the mass is 1 6 ms
An 1 0 kg mass experiences the force on the

On a winter day, a certain house loses 5 . 4 8 1 0 8 J of heat to the outside ( about 5 . 1 9 1 0 5 Btu ) . What is the total change in entropy due to this heat transfer alone, assuming an average indoor temperature of 2 0 . 0 C and an average outdoor temperature of 5 . 5 0 C . ( This large change in entropy implies a large amount of energy has

One section of a patient s femoral artery is 0 . 3 2 m long with inner radius 3 . 6 mm . If the pressure deference between the two ends of the artery is 1 . 2 mm hg , what is the blood flow rate through the artery? = 1 . 7 1 0 - 3 Pa . s

A certain spring elongates 9 . 0 mm when it is suspended vertically and a block of mass M is hung on it . The natural angular frequency of this block - spring system:

If we assume the wire is made of copper and is not a superconductor, we can calculate the resistance of the wire to carrying that much current. The resistance R ( measured in units of Ohms ) can be found if we know the resistivity ( measured in units of Ohms times meters ) , the cross - sectional area of the wire a , and the length of the wire L:

A uniform stick 1 . 5 m long with a total mass of 2 1 0 g is pivoted at its center. A 3 . 5 - g bullet is shot through the stick midway between the pivot and one end The bullet approaches at 2 5 0 m / s and leaves at 1 4 0 m / s .

A question asked in class: " An object with a mass of I pound weighs 1 pound in force on the carth." Is this statement correct? Why or why not? ( Provide detailed explanation )

Consider two protons in the 2 3 Na nucleus located 1 . 7 0 fm apart. How strong does the nuclear force ( in N ) need to be to overcome the Coulomb force?

When the total energy of a gas stays the same, and energy in the form of pressure increases, energy in the form of velocity: Stays the same.Decreases.Increases.

A comet at the farthest distance from the Sun of 4 . 7 5 1 0 9 km 4 . 7 5 1 0 9 km moves with a speed of 1 . 1 8 km / skm / s . What is the speed of the comet at the closest point at 8 . 7 7 1 0 7 8 . 7 7 1 0 7 kmkm ?

( a ) How much work is required to compress 5 . 0 5 mol of air at 1 9 . 9 C and 1 . 0 0 atm to one - eighth of the original volume by an isothermal process? The work required for a tiny volume change is P V . In this case the pressure will change as the volume decreases. How can you account for this changing pressure? kJ ( b ) How much work is

2 . Figure shows the paths traced in the horizontal plane by two pendulums swinging with different frequencies in two perpendicular directions. What's the ratio of x - direction frequency to y - direction frequency for ( 1 ) path ( a ) and ( 2 ) path ( b ) ?

A traveling wave propagates according to the expression y = ( 2 . 4 3 cm ) sin [ ( 1 . 7 4 cm 1 ) x ( 3 . 8 5 s 1 ) t ] , where x is in centimeters, and t is in seconds. Determine the amplitude of the wave. Answer in units of cm .

A 1 0 . 4 - V battery, a 5 . 0 4 - resistor, and a 1 0 . 5 - H inductor are connected in series. After the current in the circuit has reached its maximum value, calculate the following. ( a ) the power being supplied by the battery W ( b ) the power being delivered to the resistor W ( c ) the power being delivered to the inductor W ( d ) the

A string of length 0 . 7 6 0 mm is vibrating at 1 3 5 HzHz in its second harmonic and producing sound that moves at 3 4 0 m / sm / s . what is true about the wavelength of this sound

The heart of a resting adult pumps blood at a rate of 4 . 6 4 L / min . ( a ) Convert this to cm 3 / s . cm 3 / s ( b ) What is this rate in m 3 / s ?

You have 6 4 g of steam at 1 0 0 C . The specific heat capacity of water is 4 1 8 0 J / kg C and latent heat of vaporization of water is 2 . 2 6 x 1 0 ^ 6 . How much heat must be removed to change it to 6 4 gofwaterat 2 0 C ? Answer in units of J .

An object with mass 2 . 0 kgkg is executing simple harmonic motion, attached to a spring with spring constant 3 0 0 N / mN / m . When the object is 0 . 0 1 6 mm from its equilibrium position, it is moving with a speed of 0 . 4 5 m / sm / s .

When an object has negative acceleration, that could mean: The object is decelerating ( decreasing velocity ) in a negative direction The object is accelerating ( increasing velocity ) in a positive direction The object is decelerating ( decreasing velocity ) in
When an object has negative acceleration, that

Midterm 3 B Multiple Choice: Write your answers in the provided space. [ 3 pts ] An oscillating voltage of fixed amplitude is applied across a capacitor. If the frequency of the voltage is increased, will the amplitude of the current through the capacitor
Midterm 3 B Multiple Choice: Write your answers

A certain transverse wave is described by y ( x , t ) = Bcos [ 2 ( x L - t ) ] where B = 5 . 8 0 m m , L = 2 9 . 0 c m , and = 3 . 8 0 1 0 - 2 s . Determine the wave's amplitude. Express your answer in meters. Request Answer Part B Determine the wave's wavelength. Express your answer in meters. q , Request Answer? Part C Determine the wave's
A certain transverse wave is described by y ( x ,

A long straight wire carries a 1 0 . 0 A current in the + x direction. A particle with - 1 2 uc charge at a radical distance of 0 . 0 5 0 m above the wire in the x , y plane moves at 9 . 0 0 m / s in the - x direction What is the magnitude and direction on the force of the particle?

. When calculating the rotational inertia of an object, can its mass be assumed to be concentrated at its center?

1 . Along what streamline is Bernoulli's equation applied in the apparatus?

Calculate the electric field that will suspend an oil droplet that has a mass of 2 . 0 1 0 - 1 5 k g and a charge of + 3 e .
Calculate the electric field that will suspend an

The north pole of a bar magnet points toward a thin circular coil of wire containing 4 2 turns ( see the figure ) . The magnet is moved away from the coil, so that the flux through one turn inside the coil decreases by 0 . 3 tesla \ ( \ cdot \ mathrm { m } ^ { 2 } \ ) in 0 . 1 seconds. What is the average emf in the coil during this time interval?
The north pole of a bar magnet points toward a

Question ( 2 ) : For the given pulley system assume that the pulley is a uniform solid disc of M = 3 . 0 k g and diameter 4 0 cm . If k = 0 . 1 between table and 1 0 kg block, and the system is release from rest, follow the diagram ( Pulley has rotational inertia I = 1 2 m p p R 2 ) ( i ) Draw the free body diagram and derive an expression for the
Question ( 2 ) : For the given pulley system

. 0 One rod is made from lead and another from quartz. The rods are heated and experience the same change in temperature. The change in length of each rod is the same. If the initial length of the lead rod is 0 . 1 0 m , what is the initial length of the quartz rod?
. 0 One rod is made from lead and another from

Question 2 5 Ahmad has two pendants made up of the same material. They are equally thick and weigh the same. One of them has a shape of a grey "annulus" formed by two circles with radius 6 cm and 4 cm ( see the diagram ) . The second has the shape of a solid circle. What is the square of the radius ( i . e . radius radius ) of the second pendant?
Question 2 5 Ahmad has two pendants made up of

The sound from the whistle of a truck moving at 2 0 m s toward a cliff reflects from the cliff and is heard by the driver of the truck. When it is parked at the side of the road, the whistle from the truck produces sound of frequency 2 0 0 0 Hz . As observed by the driver of the truck, what is the change in frequency the sound from the whistle due
The sound from the whistle of a truck moving at 2

0 After an unfortunate accident at a local warehouse, in which a jib crane collapsed and injured a worker, the owners want to determine the cause. A diagram of the jib crane is shown in the image. The horizontal steel beam had a mass of 9 5 . 3 0 kg per meter of length and the tension in the cable was T = 1 2 . 6 9 k N . The crane was rated for a
0 After an unfortunate accident at a local

REPORT INSTRUCTIONS Introduction ( 1 0 P ) 5 p Aim 5 p Explain Projectile Motion ( not from manual or wikipedia ) Material - Method ( 1 5 P ) 5 List the materials used in the experiment ( all of the devices and objects ) 1 0 p Write in detail the procedure of the experiment step by step Result ( 6 0 p ) Give the Data Table A with your experimental
REPORT INSTRUCTIONS Introduction ( 1 0 P ) 5 p

In the circuit shown in ( Figure 1 ) , the potential difference across a b is 2 5 . 5 V . Part C Calculate the charge on the 6 . 0 0 F capacitor. Express your answer with the appropriate units. Q 6 . 0 0 F = Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Enter your answer using units of electric charge. Part D
In the circuit shown in ( Figure 1 ) , the

Find the magnitude of the electric field at point P created by two point charges q 1 = 3 C and q 2 = 2 C arranged along horizontal as shown in the figure. ( in V m , use Coulomb constant as 9 1 0 9 N m 2 C 2 ) 2 0 0 0 2 2 8 0 3 4 8 0 3 7 2 0
Find the magnitude of the electric field at point

Fasten one end of a vertical spring to a ceiling, attach a cabbage to the other end, and then slowly lower the cabbage until the upward force on it from the spring balances the gravitational force on it . What is the relationship between the change of gravitational potential energy of the cabbage - Earth system ( U g ) and the change in the
Fasten one end of a vertical spring to a ceiling,

8 0 Observing the Invisible - Molecular Excitations and Synchrotron Radiation A molecule changes its vibrational energy state as shown in the figure below. Which of the following are represented incorrectly: the direction of the photon, the energy of the photon, and / or the associated spectrum of light? Explain your reasoning. Correct the graphs
8 0 Observing the Invisible - Molecular

While landing your plane you hit with a vertical velocity of 6 m / s down but bounced back up with a vertical velocity of 3 m / s up . What kind of collision is this

In a student experiment, a constant - volume gas thermometer is calibrated in dry ice ( 7 8 . 5 C ) and in boiling allyl alcohol ( 9 7 C ) . The separate pressures are 0 . 8 9 4 atm and 1 . 7 1 4 atm. Hint: Use the linear relationship P = A + BT , where A and B are constants. ( a ) What value of absolute zero does the calibration yield? Your

How do these observations relate to entropy temperature in second law thermal dynamics

An atom emits a photon with a wavelength of 2 4 0 nm . By how much does the atom's energy change? 0 . 6 1 0 eV 1 . 1 2 eV 2 . 2 6 eV 3 . 1 1 eV 5 . 1 8 eV
An atom emits a photon with a wavelength of 2 4 0

Your ear is capable of differentiating sounds that arrive at the ear just 1 . 0 0 ms apart. What is the minimum distance ( in cm ) between two speakers that produce sounds that arrive at noticeably different times on a day when the speed of sound is 3 4 9 m / s ?

In an L - R - C series circuit, the resistance is 3 6 0 ohms, the inductance is 0 . 3 0 0 henrys, and the capacitance is 1 . 4 0 1 0 2 microfarads.

As part of a safety investigation, two 1 9 0 0 kg cars traveling at 1 8 m / s are crashed into different barriers. Find the average force exerted on the car that hits a line of water barrels and takes 1 . 3 s to stop. Find the average force exerted on the car that hits a concrete barrier and takes 0 . 1 0 s to stop.

At a track meet, a runner runs the 1 0 0 - m dash in 1 1 . 5 s . Flag question: Question 6 Question 6 5 pts What was the runner's average speed? Group of answer choices 9 . 4 m / s 9 . 1 m / s 7 . 8 m / s 7 . 3 m / s 8 . 7 m / s

a thin walled hollow spherical shell of mass m and radius r stsrts from rest and rolls without slipping down a track points a and b are ona circular part of the track having radius R the diameter of rhe shell is very small compared to h 0 and R and the work done by rolling friction is negligible what is the minimum height h 0 for which this shell

Scientists looking at an overview of physics today understand that there are four forces that govern all action in the universe. These four forces are the strong nuclear force, the weak nuclear force, electro - magnetism and

A certain nucleus is known to be an isotope of lead, although the particular isotope is not known. From such limited information, which of the following quantities can you specify? None of these. Its neutron number. Its atomic number. Its atomic mass number. Shorthand notation for a particular isotope of uranium is given by the following: ? 9 2 2
A certain nucleus is known to be an isotope of

You are required to select a materal for a design which has a permittivily of 1 1 0 - 1 0 F m . What does the melative nerminuty of your choser material need to be ? Answer:
You are required to select a materal for a design

2 . Sidewise force of the propeller tends to throw a vessel's stern to the right or left, depending on rotation. This force is caused by A . back current from the rudder B . lower pressure on the right or left side of the propeller. depending on rotation C . greater pressure on the right or left side of the propeller, depending on rotation D .
2 . Sidewise force of the propeller tends to

The same potential difference is applied across two wires. Wire A has twice the resistance compared to wure B . If the current through wire A is I , what is the current through wire B ? A . I ( B . ) 2 I C . I / 2 D . 4 I E . I / 4
The same potential difference is applied across

use the image provided please!
use the image provided please!

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