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Physics Questions and Answers December 04, 2019

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What four conditions must be met to create a nuclear bomb from a fission chain reaction? 6. Burning chemical poisons in a gas flame often renders those poisons harmless. Why won't that strategy make radioactive materials less dangerous?

The main parts of a precipitator are the _____, collector cells, and power supply. Option A fin tube Option B ionizer Option C cooler Option D oscillator

Consider the blue colour seen in a soap bubble and the Morpho butterfly. Which of these statements best describes any fundamental difference in the CAUSES of these colours? Question 2Select one: a. There is no fundamental difference in them, since they are both BLUE colours. b. Soap bubble: light travelled through a medium to interfere; butterfly:

6-42. The boat is powered by the fan, which develops a slipstream having a diameter of 1.25 m. If the fan ejects air with a velocity of 40 m/s, measured relative to the boat, and the boat is traveling with a velocity of 8 m/s, determine the force the fan exerts on the boat. Assume that the air has a constant density of pa = 1.22 kg/m" and that the

What is "start pressure?" Group of answer choices The amount of pressure necessary for the bullet to overcome the initial forces of friction The velocity of the bullet before it leaves the barrel A jet of flame that travels around the anvil

1. Convert 12 m to nm. Use dimensional analysis method. [1 m = 1 x 10 9 nm] show your work

Actividad de aprendizaje 10. Leyes de la refraccin de la luz

When plotting the energies of an ideal SHM system versus displacement (x), what shape do the Potential Energy (PE) and Kinetic Energy (KE) curves follow? Group of answer choices PE follows a parabolic pattern, and KE follows an inverted parabolic pattern. Both PE and KE are inversely proportional to x. PE is quadratic, KE is constant. PE is

What does the prefix "tele" mean? Group of answer choices front back near, close distant, far

What is the acceleration due to gravity on the surface of the Earth? A) 9.8 m/s B) 10 m/s C) 5.6 m/s D) 1.6 m/s

A block of mass slides down a plane having an inclination of angle . Which one of the following equations correctly represents the magnitude of the component of the the weight along the plane? gbracket(fncos()) mgbracket(fntan()) mbracket(fnsin()) gbracket(fntan()) mgbracket(sin) mgbracket(fncos()) mbracket(fncos()) gbracket(fnsin())

How much work will a machine with a power rating of 1.1 103 watts do in 2.0 hours? A. 1.5 106 joules B. 2.1 106 joules C. 4.0 106 joules D. 7.9 106 joules

8. design simple practical activities or models to determine how variations in physical properties, such as shape, mass, and volume, affect an object's ability to float in a fluid

Doubling the potential across a given capacitor causes the energy stored in that capacitor to Option A quadruple Option B reduce to one-half Option C reduce to one-fourth Option D double

A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at 37.0 m/s; when it leaves the bat, the ball is traveling to the left with a speed of 48.0 m/s. The ball and bat are in contact for 1.77 ms. Determine the magnitude and direction of the force applied by the bat on the ba

5 Select the correct answer. Which description explains the flow of heat? A. from cold to hot B. from hot to cold C. from cool to warm D. from cold to warm Reset Next

The maximum allowable potential difference across a 240 mH inductor is 340 V . You need to raise the current through the inductor from 1.1 A to 3.2 A . Part A What is the minimum time you should allow for changing the current

The table contains data obtained during the single-slit microwave experiment with a slit width of 7 cm and a wavelength of 2.8 cm. To compare data like this with theory in Sec. 8.5, you will have to normalize both the intensity and the angular data. What is the normalized angle / at 25? 52a83.gif Group of answer choices 1.056 1.919 2.973 1.890 \f

6 1 pts Joules | Problem Which of the following can be expressed in units of joules? Group of answer choices work kinetic energy force weight potential energy thermal energy total energy

2 What light type is omni-directional, and helps draw attention to a focal point? Choose one 1 point Ambient Light Directional Light Spot Light Point Light

walk me through what to draw here. dumb it down to the max Draw the major product of this reaction. Ignore inorganic byproducts. CN 1. LiAIH4 (excess) 2. H30+

Pulled the sheet to look for object, picked taller beaker, said feather wouldnt break the glass, said feather on top of glass would break the glass

CT7-4 A hockey puck sliding on an ice rink is moving at 1 m/s when it slides onto a carpet that someone left on the ice. The puck comes to rest after moving 1m on the carpet. How far along the carpet would the puck go, if its initial speed was 2m/s? Blue: 1.5m Pink: 2m Yellow: 3m Green: 4m Purple: Impossible to determine. Hint: Apply the

Using the wave model of light to study its interaction with physical matter is *MOST* useful Question 18Select one: a. only with very large physical objects. b. when wavelengths of light are comparable to the size of the matter. c. in all cases, large or small. d. only with very short wavelengths of light

When should a backup generator be used in a wind or solar power system? Option A Only at night when the system is idle. Option B Only during severe weather conditions. Option C Whenever it is convenient for the owner. Option D During low energy production periods to charge batteries

A family wonders how purchasing an Energy Star (high efficiency) refrigerator will impact their energy budget. Their standard refrigerator runs at 500 Watts per hour. An Energy Star refrigerator will run at 425 Watts per hour. What would be the energy cost savings of running the Energy Star appliance for one month? (Consider the energy cost to be

A uniform beam of length L and mass mB is supported by two pillars located L/3 from either end, as shown in the figure. A duck of mass mD stands on one end. A scale is placed under each pillar. The entire system is in equilibrium. Part (c) Enter an expression, in terms of defined quantities and g, for the sum of the scale readings. \f

The most common frequency for AC electricity in North America is 50 Hz. True False

Un alumno decide poner una cmara a las ruedas de su coche. La rueda gira a una frecuencia de cuatro vueltas por segundo, es decir, cada vuelta tarda 250 milisegundos, a qu frecuencia gira? Seleccione una: A. Frecuencia = 250 Hz. B. Frecuencia = 4 Hz. C. Frecuencia = 2 KHz

What does the term 'equipotential surface' refer to in the context of electric fields? Option A A surface that connects two conductors Option B A surface where charge density is uniform Option C A surface where the electric potential is constant Option D A surface where the electric field strength is constant

As your speed increases, so does your: Hint: You must select ALL correct answers. Risk of a serious injury or death. Physical impact if you crash. Control of the vehicle. Stopping distance

What is a pendulum? A. A pendulum is a grandfather clock. B. A pendulum is a mass suspended on the bottom of a string. C. A pendulum is several weights tied together and arranged in a circle. D. A pendulum is the time it takes for a bob to swing back and forth one time

Wind is defined by both its speed and the direction from which it is blowing

Which of the following is the most validated technique for detecting breast masses during palpation? Circular motion starting at the nipple and moving outward Vertical strip pattern using light, medium, and deep pressure Wedge pattern from the periphery toward the nipple Random palpation of all quadrants

2.8. El cilindro de 100 kg rueda sin deslizarse sobre el plano horizontal. Determine la aceleracion de su centro de masa y su aceleracion angular 0.3 m P = 200 N

11 1 pts Toboggan friction | Problem A toboggan of mass m and velocity vi slides across a frictionless, frozen pond. When it reaches the far edge of the pond and encounters flat ground (where there is friction between the toboggan and the ground), the toboggan then begins to slow, and it eventually comes to rest. The work done by friction is

D and E do not have exact locations, they are 1m apart and both sit along the same horizontal rail. C stays between points D and E

Using the total moment of inertia Iy of the system found in Part E, find the total kinetic energy K of the system. Express your answer in terms of m , , and r . 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

How does one achieve 'time- coherence'? UESTION 26/38 How does one achieve 'time-coherence'? Entry Price/Exit Price Structuring. Strategic forecasting through the use of trend lines, Fibonacci levels and oscillator studies. 2 Volume Profiling. Price based levels of interest based on the aggregation of purchase data. Cannot be falsified. Through

Graphing Velocity and Acceleration Worksheet 1. Which of the following quantities represents the rate of change of an object's position per unit time? a) speed b) displacement c) acceleration d) velocity 2. Dexter uses a compass to walk 140 m due east. Which of the following correctly measures his distance and displacement? a) Distance and

Physics 400 Lab Purpose: To take measurements to determine the average speed of a rolling ball Be sure to read the instructions carefully, paying close attention to when to start and stop the stopwatch. You will need the help of a friend or family member to gather the data. Please be sure to follow all lab safety rules as you do this activity

AGraphing Velocity and Acceleration Worksheet 1. Which of the following quantities represents the rate of change of an object's position per unit time? a) speed b) displacement c) acceleration d) velocity 2. Dexter uses a compass to walk 140 m due east. Which of the following correctly measures his distance and displacement? a) Distance and

What does the term 'equipotential surface' refer to in the context of electric fields? Option A A surface that connects two conductors Option B A surface where charge density is uniform Option C A surface where the electric potential is constant Option D A surface where the electric field strength is constant

Week 1 Homework Problems OpenStax College Physics, Chapter 13 Problems: Frost damage to most plants occurs at temperatures of 28.0 or lower. What is this temperature on the Kelvin scale

D FLAG A nurse is caring for a group of clients. The nurse demonstrates adherence to the ethical principle of fidelity by doing which of the following? o O o . o o . O Keeping an appointment with a client C Allowing a new mother to hold her stillborninfant O Confirming that a client going for surgery has signed a consent form O Refusing to

What does the wind turbine rotor consist of? Option A The generator components Option B The main framework of the turbine Option C The electrical wiring Option D The blades that capture wind energy

Pulling apart from each other . . . 0:07/0:07 O O Interphase telophase O metaphase O prophase O anaphase MacBook Air

R1 is -2 and R2 is 4 and 5 = 01(71)+ 02(12) 1 By plugging in your previously found numerical values for r1 and r2 and doing some algebra, find a1, 02: (Be careful to note that (-x)" # -(x") when n is even, for example (-3) 2 # -(32 ).) 02 = 5 Note the final solution of the recurrence is: an = a1(71)" + 02(12)" where the numbers r;, a; have been

Can you check my answer, In order to find the final displacement vector here is what I would do: 4.0 m West 2.5 m North 1.1 m West 7.3 m South Find displacement with each route: West=4.0 m +1.1 m=5.1 m North=2.5 m South=7.3 m Find the North to South direction=7.3 m-2.5 m=4.8 m South Then I would use the Pythagorean theorem to find the final

What is the acceleration ar(t) of the rod? Take m to be the mass of the rod. Express your answer as a function of V , B , the velocity of the rod vr(t) , L , R , and the mass of the rod m

9 1 pts Net work requirements | Problem Which of the following are required to determine the net work done on a system? Group of answer choices Magnitude of the net force Velocity of the system Position of the system Magnitude of displacement of the system Direction of the net force Direction of the displacement of the system

2 Select the correct answer. What are the SI units for specific heat capacity? A. J B. J/C C. J/gC D. J/g Reset

2 Electric Field Lines Objective: Qualitative study of electric fields. Purpose: To develop an understanding of electric potential and electric fields To better understand the relationship between equipotentials and electric fields Introduction The magnitude of an electric field in the space surrounding a source charge is written as

4 1 pts Work ID | Problem The equation below shows the mathematical representation(s) for mechanical work done on a system by an average force external to that system; thus, "work" here means "external work." Match each term in the equation with the correct description from this list: (1) Average External Force Vector; (2) Magnitude of the Average

The skateboarder, starting from rest, falls through a vertical height of h m through the ramp before getting air bound in horizontal direction. The speed of the boarder right before they gets air bound is A) 1/2mv2 B) mgh C) 2gh D)2gh

Select the correct answer. How is the acceleration of an object in uniform circular motion constant? A. in magnitude only B. in direction only C. in both magnitude and direction D. in magnitude, direction, and orientation Reset Next

Which of these colours is NOT caused by the interference of light? Question 11Select one: a. Peacocks' feathers. b. Colours off CD/DVDs. c. Soap bubbles' colours d. Rainbow colours exiting a prism. e. The 'glow' in cats' eyes

Con que aceleracion avanza la masa si el coeficiente de rozamiento cinetico =0.5 y la gravedad =10m/s

(b) Choose one part of your solution and perform a sense-making analysis. Choose between Sign, Units / Dimensionality, Related Quantities, or Proportionality / Covariation sensemaking techniques. Clearly indicate which you are employing. You will likely want to make a clear prediction, explain the prediction, then compare the prediction to your

A combined cycle power plant consists of a gas turbine topping cycle and an organic Rankine cycle (ORC) bottoming cycle, as illustrated in the accompanying schematic. Steady-state operating data are labeled on the figure. Due to internal irreversibilities, the generator electrical output is 95% of the turbine shaft power. A regenerator is included

___ is important because a loop with too much impedance is not able to generate enough current to deliver the 20 mA that is necessary for signaling. Question 22 options: Allowable loop impedance Cable shielding Electromagnetic interference (EMI) Ground looping

The first activity will help us better understand our own sense of balance and center of mass. First, stand up straight in the center of the room with nothing around you, or have a lab assistance do this. Next bend at the waist and touch your toes, or ankles if you are not quite as flexible as you used to be. Do not bend your knees during this

does this work, Relative velocity in relation to how quickly the Earth is moving through space, would support no answer to this question because the earth does not have a chosen reference point

Find the total moment of inertia Iy of the system of two particles shown in the diagram with respect to the y axis. Express your answer in terms of m and r . View Available Hint(s)for Part E 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

When a constant net torque is applied to an object that is free to rotate, the object A) Rotates with constant angular speed B) Translates with increasing speed C) Rotates with increasing angular speed D) Rotates with increasing angular acceleration

A(n) ___ is the current flow from one grounded point to a second grounded point in the same powered loop. Question 3 options: ground loop balanced line isolated device current repeater

Lab 9 Snell's Law Objectives Understand Snell's Law. Use Snell's Law leads to find the index of refraction for water. Determine the critical angle for water. Materials Semi-circular water dish with a protractor imprinted on the bottom Protractor Laser (w/ batteries installed) Paper Tape Safety Precautions In this lab you will be using a 1 mW red

The of a wave can be found by multiplying the wavelength by the frequency

The frequency of the disturbances of a periodic wave is inversely related to the of that wave

The loudness, L, in decibels (dB), is given by the formula Upper L equals 10 times log StartFraction Upper I Over Upper I 0 EndFraction , where Upper I 0 equals 10 Superscript negative 12 Baseline Upper W divided by m squared . Compute the sound intensity level in decibels for each sound listed in the table to the right. ModifyingAbove Sound With

1. Open the simulation and select Intro mode (default: air to water). 2. Observe and answer the following using the protractor and intensity meter: a. What happens when the light ray reaches the air-water boundary? When the light ray reaches the air-water boundary, part of the ray bends as it enters the water, and a small portion reflects into the

According to Niels Bohr, an electron in an excited state could give off Group of answer choices at most a single photon until the atom was excited again. a continuous cascade of photons for a high-level transition. several photons in a series of transitions to the ground state. none of these

Match the following system types and their definitions. Note that there is one distractor answer. Group of answer choices Isolated systems Energy, but not matter, can enter and exit. Closed systems Matter, but not energy, can enter and exit. Open systems Both energy and matter can enter and exit

Question 7 1 pts What is the fundamental frequency (in Hz) produced by a pipe of length 1.78 m open at both ends on a day when the speed of sound is 338 m/s? Enter an integer. Question 8 1 pts The speed of sound waves having a frequency of 256 Hz compared to the speed of a sound wave having a frequency of 512 Hz is half as great. four times as

In Yosemite National Park in July 1996, a 162.000-ton mass of granite pulled anay from a canyon wall then launched into the air for a 1, 640-foot drop in an arcing trajectory, reachin a speed of 270 miles per hour before hitting the valley floor. This event would best be classified as a rockfall a rotaional slide O creep subsidence

6. Explain how a transistor can amplify a small AC input signal when biased correctly

Explain the steps that you would use to determine estimated digit in your volume measurement using a graduated cylinder. Answer this one in one paragraph directly

Cules son dispositivos que permiten almacenar energa elctrica y estn formados por dos conductores prximos separados por algn material dielctrico? (Opcin mltiple) Opcin A Capacitores Opcin B Inductores Opcin C Resistores Opcin D Diodos

7.12 For a p-n-p BJT with NE > NB > NC, show the dominant current components, with proper arrows, for directions in the normal active mode. If IEp = 10 mA, IEn = 100 A, ICp = 9.8 mA, and ICn = 1 A, calculate the base transport factor, emitter injection efficiency, common-base current gain, common-emitter current gain, and ICBO. If the minority

Fill in the Blank Question Fill in the blank question. The simplest standing wave is one with two nodes and one antinode. It is called the first or the wave

write 60 words on force, mass, and acceleration of newton 2nd law

The heavier a load is on a cart, the more stopping distance is required. Question 3 options: True False

Select all that apply Moving charges cause Multiple select question. electric fields. water waves. magnetic fields. solar fields. sound waves

the following. 7. What is it called when a galaxy is moving toward a telescope at a very high speed? 8. What are two everyday applications of the Doppler effect? 9. What variables must be known to determine the observed frequency of a wave? 10. If the observer moves toward the source, will the observed frequency be greater than or less than the

A disturbance that travels parallel to the direction of travel of the wave is called a --- wave

VIDEO LAB: Making a Simple Steam Engine The Big Idea You will create a device that will convert thermal energy to mechanical energy. It will be a representation of a turbine. Video Lab Watch the video lab and answer the questions. Then, if able, perform the experiment yourself. 1) Choose the best answer. What happened to the molecules in the water

The reason why the west coast of the U.S. receives more precipitation during the winter months than the summer months is that the semi- permanent high pressure weakens during the __, allowing __ air to travel further south out of the Sub- Polar Low

How should you use the polarizing lenses when photographing the penguin? Question 5 Answer a. Use the lens when the light is dim. b. Stack more than one polarizing lens. c. The lens will not make any difference. d. Rotate the lens to reduce the intensity of the reflected light

The Schrdinger equation is restricted to Group of answer choices submicroscopic and microscopic particles. macroscopic particles. submicroscopic particles. none of these

A ball of mass M with an initial velocity vo=0 m/s is dropped onto a spring of constant k and comes to a stop. If the ball has fallen a distance h, how much does the spring compress? 2Mgh/k k/2Mgh (Mgh/k) k/Mgh (2Mgh/k) 2. A constant force F is applied in the direction of motion to a mass M for a distance of x. The object starts with a velocity of

Object is already moving at a constant speed to the right before this forces are applied. NET HORIZONTAL FORCE= Balanced / Unbalanced (circle one) What, if anything, does this do to the objects horizontal motion? Accelerate right / slow down / continue at constant speed (circle one) NET VERTICAL FORCE= Balanced / Unbalanced (circle one) What, if

J ATI Nursing Nati RN ATI Capstone Leadership and Community Health CLOSE Question: 40 of 50 Time Remaining: 00:42:19 Pause Remaining: 00:05:00 PAUSE FLAG A nurse manager is discussing electronic medical records with a newly licensed nurse. Which of the following actions should the nurse take to maintain client confidentiality? (Select all that

Explain, in terms of physical concepts such as force, torque, mass, moment of inertia, angular/linear acceleration, and angular/linear velocity, how you will impart a velocity to the baseball? Baseball Trebuchet Launcher

Select the correct answer. The area under which of these graphs can be used to estimate the value of impulse? Firefox File Edit View History Bookmarks Profiles Tools Window Help zm W Q Q 2 0 4 7 9 8 Tue Nov 18 11:53 AM @ Section Details - Science 7 Sem X @ Section Details - Physics Sem 1 X Curriculum Details X @ Impulse: Mastery Test * *Chat

how do i spell the following: (under), (behind), (in front), (inside), (right), (on/top) (chair), (bag), (desk/table)

Fill in the Blank Question Fill in the blank question. Electric and magnetic fields are both produced by moving . (Enter only one word per blank.)

Can you do the same to this one and expand a little on her interest in quantum physics 7. Areas of Exploration \\f | were a scientist exploring electric and magnetic fields, I'd be especially drawn to how they behave at the microscopic scale, particularly in biological and quantum systems. At the nanoscale, electric fields can influence ion

Gear 1 has 12 teeth and gear 2 has 9. If gear 2 turns at 60 rpm, how fast will gear 1 turn

Why does the incident light not refracted when it reaches the first glacier sample slit? Question 7 Answer a. The incident angle is larger than the critical angle. b. The critical angle is larger than the incident angle. c. The glacier sample absorbs the light. d. The angle of reflection is larger than the angle of refraction

NET HORIZONTAL FORCE= What, if anything, does this to do the objects horizontal motion

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