S
  1. study help
  2. subject categories
  3. sciences
  4. physics
  5. december 2019
  6. 04

Physics Questions and Answers December 04, 2019

Expert-verified solutions to help you succeed

A 1200kg car is struck behind by another car experiencing positive acceleration that instantly increases the speed from 0m/s to 5m/s. How much force is applied to the car from the second car to cause this acceleration

If A=3i-2j-k and B=2i-4j-3k, Find AB Question 6Answer a. 2i+11j+16 b. 4i+7j+12k c. i+3j+4k d. 5i+6j+8k

What was the nickname of the Tacoma Narrows Bridge? Question 5 Select one: a. Bouncing Betty b. Listing Lilly c. Jostling Jocelyn d. Sagging Sarah e. None of the above

2. A brick wall, 225 mm thick and having a thermal conductivity of 0.60 W/(m K), measures 10 m long by 3 m high, and has a temperature difference between the inside and outside faces of 25 K. What is the rate of heat conduction? (Ans: 2000 W or 2 kW) 3. A system weighing 5 Kgs is heated from its initial temperature of 30C to its final temperature

162 pts A comet that has a semi-major axis of 100 AU must have a period of about Group of answer choices 10,000 years. 106 years. 100 years. 1,000 years

4, A coherent ground-based radar system has a pulse length of | microsecond, a PRF of nae and an antenna azimuth beamwidth of 3 degrees. There is a target ata eee of 60.0 km. This system is range-ambiguous. What is the apparent range to the target' 5. For the case described in problem 4; a, What is the surface area of a clutter cell at the true

Throat diameter (for circular throat) 20 ????????/???? q = A ???? = ___________________________________ cross sectional area (circular) A = _____________________________ ft2 throat diameter D = _________________________________________ft u = 12 ft/s q = Au= cross sectional area (circular) A = ft 2 chamber diameter D = ft

my photodetectors has a bandwidth of 100 MHZ , I am trying to measure i picosecond -duration pulse. what will 1 detect in an oscilloscope? and how about if it is 10 picosecond pulse?

Which of the following statements accurately decribes the sign of the work done on the box by the normal force? View Available Hint(s)for Part B positive negative zero

What kind of electromagnetic wave is needed in order to measure the structure of a single crystal silicon wafer

show work A runner taking part in the 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of 30 m. If he completes the 200 m dash in 23.2 s and runs at constant speed throughout the race, what is his centripetal acceleration as he runs the curved portion of the track?

Suppose you exert a force of 180 N tangential to a 0.280-m-radius 75.0-kg grindstone (a solid disk). What is the angular acceleration assuming negligible opposing friction? 23.9 rad/s2 30.4 rad/s2 8 rad/s2 39.3 rad/s2 17.1 rad/ss 14.5 rad/s2 37.2 rad/s2 35 rad/s2

Which best demonstrates friction? Multiple choice question. an ice-skater sliding across the ice without noticeably slowing down a car rolling to a stop at a traffic light a baseball moving in a projectile motion the free fall of astronauts in orbit

Video towers must have some device for recording pictures. True False

The __________ is housed in the rear sight and is used to read the dial. Sighting wire Fixed black index line Compass dial Lens

Cuando las vibraciones del brazo producen ondas estacionarias, qu ocurre fsicamente en la estructura? a. Las ondas se detienen por completo debido a la resonancia. b. Las ondas se propagan indefinidamente sin interferencia. c. Solo hay un pulso reflejado sin interferencia. d. Se superponen dos ondas de igual frecuencia y sentido opuesto, generando

When we walk, our legs alternately swing forward about the hip joint as a pivot. In this motion the leg is acting approximately as a physical pendulum. Treating the leg as a uniform rod of length D = 0.80 m, find the time it takes for the leg to swing forward

Braking Distances Project Reaction Distances + Braking Distances Scenario ndition(s), a reaction situation Directions: Create a real-life driving scenario that includes a road Condt reasonable range of speeds. and bas either a successful or an unsuccesstul outeomese being the TOTAL stopping

In a charging capacitor, where is the displacement current present? Group of answer choices Only in the wires Nowhere; displacement current is zero in capacitors In both the wires and between the plates Only in the dielectric between the plates

As the distance between two magnetic poles decreases, the magnetic force Multiple choice question. increases. decreases. increases then decreases. decreases then increases. remains constant.

Identify de Broglie's main scientific contribution. He discovered the nucleus in atoms. He described a wave equation that shows the probable location of an electron in an atom. He described how the wavelength of a moving electron is related to its mass and velocity. He proposed the uncertainty principle dealing with the wave-particle duality of

Imagine this: You've decided to pursue your lifelong dream of becoming a pilotor earning a higher rating if you're already certified. You finally have the time, resources, and motivation to take flight. Now comes a critical decision: Where will you train? In this assignment, reflect on the factors that will shape your choice of airport and

what do the size of the arrows at the top of each sphere represent ravity-force-lab_all.html Force on m2 by m1 = 0.000 000 463 478 N Force on m1 by m2 = 0.000 000 463 478 N m1 0 meters 1 2 6 7 8 9 10 Mass 1 Mass 2 Force Values 100 kg 400 kg Decimal Notation 10 1000 1000 O Scientific Notation Hidden Constant Size

how about this answer for 1, Based on observing an object we can tell if there is a net force acting upon the object if there is a change in the motion. If there is a change in motion then there is an unbalance net force. If there is a balanced net force then the object is at rest or moving at a consistent pace

4. Claculations; mass on a spring; question 3. Using te value of k from step 1 of ghe calculations, calculate a theoeticla value for the slope of your new graph. K = 11.2 N/m

what is V_b and V_i in this lab report, and how do i acquire their values

2 Select the correct answer. What does the second law of thermodynamics state? A. No heat engine can convert all the heat input into usable work energy. B. Entropy of systems in nature always decreases as they run. C. Matter cannot be created or destroyed; it can only change forms. D. Energy cannot be created or destroyed; it can only change forms

centrifugal [sen-TRIF-uh-guhl] - drawing away from a center; the force producing this movement centripetal [sen-TRIP-i-tl] - drawing toward a center; the force producing this movement counterbalance [KOUN-ter-BAL-uns] - to oppose with equal force gravitation [GRAV-i-TEY-shuhn] - the act of movement toward an attractive source; the force producing

When you step on a stone, the stone applies an equal and opposite force on your foot as your foot applies to the stone. False True

Elastic collision between equal masses Collision 1 Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Momentum Initial (kg*m/s) Momentum Final (kg*m/s) Mass 1 2.00 +3.00 -3.00 6.00 -6.00 Mass 2 2.00 -3.00 3.00 -6.00 6.00 Elastic collision between unequal masses Collision 2 Mass (kg) Initial Velocity (m/s) Final Velocity (m/s) Momentum Initial

Your percent difference Aspects of your graph and its best-fit curves Physical limitations in making your measurements

Collect the data you need to find a relationship between frequency and wavelength for each of your cords. Keep in mind you will have two sets of frequencies and two sets of wavelengths--make sure you have a way to keep them straight in your data table

J [U7SA] Ayo, a behavior analyst, delivers several tasks in a row in quick succession to Bucky. Bucky then engages in a tantrum in the classroom, which results in a termination of the tasks. Ayo decides to program some delays in between tasks, and Bucky is now able to manage the number of tasks being presented during sessions without tantrums.

you are wrong, this is the question If the normal physiological concentration of HCO3 - is 24 mmol L-1, what is the pH of blood if Pco, drops to 20.0 mmHg ? Express your answer numerically using two decimal places. View Available Hint(s)

walk me through what to draw here. dumb it down to the max Draw the major product of this reaction. Ignore inorganic byproducts. Mg Br 1. CO2, THE 2. H30+

When is the average velocity of an object equal to the instantaneous velocity? A) always B) when the velocity is constant C) only when the velocity is decreasing at a constant rate D) never E) only when the velocity is increasing at a constant rate

What evidence supports the Big Bang theory? Category Evidence for the Big Bang Category Not evidence for the Big Bang, the decreasing recessional velocity of galaxies, the infinite age of the universe, the increasing recessional velocity of galaxies, long wavelength radiation that permeates the universe, the presence of supermassive black holes in

1. Your doctor has told you to watch your weight. Of course, your weight comprises two factors, so you assume that she wants you to watch both your mass and the local value of g. Which explains why you are carrying a small mass m on an elastic band wherever you go. Most of the time, the elastic band is stretched by a distance of 2.1 cm. However,

What is your field speed (in MPH) if you travel 180 feet in 20 seconds in a field test strip? ANSWER USING 1 DECIMAL OR 1/10TH PLACE)

why can you use energy conservation? Wouldnt the height have to be the height from the ground

A converging lens produces an image twice the size of the original. If the object is placed 0.40 m from the lens, and the image produced is 0.80 m from the lens. What is the focal length of the lens? Group of answer choices 0.351 m 0.112 m 0.416 m 0.267 m

Fc 4 Points "Were the tactical procedures current and did they cover notifications, assessment, response, recovery, and termination adequately?" This is asked in which key topic of the post-incident analysis? A Tactical operations B Resources Plans and procedures D Training

Which of the five simple pendulum initial angles should give results that most closely agree with the theoretical predictions? Why

Exercise 1, Question 1: The amplitude of an electromagnetic wave is inversely proportional to the distance from the wave source. From your measurements in step, determine whether the meter reading of the receiver is directly proportional to the electric field or o the intensity of the wave. Explain

The quantity that shifts in a gravitational red shift is Group of answer choices wave frequency. field intensity. space-time curvature. wave direction. none of these

Calculate the required surface area in a single-pass cross-flow heat exchanger that operates with both fluids unmixed to cool down 50,000 lbm/h of air at atmospheric pressure from 120 F to 100 F using 115,000 lbm/h of water entering at 60 F. The overall heat transfer coefficient is Uo = 30 BTU/(h.ft2. F)

25A Thierry, the museum director at the Louvre in Paris, would like to put a nonreflective coating on the glass that covers a precious Rembrandt. The glass company makes sheets of glass with titanium oxide coatings (index of refraction 2.62); the coating can be as thin as 1.0 ????m. If the biggest component of the museum lighting is a 580 nm

How is nonionized radiation used to speed up the rate of polymerization? Option A Electron acceleration Option B Gamma radiation Option C RF induction heating Option D Annealing Option E Cold sterilization

What is momentum? 8. It is harder to stop a car moving at 60 miles per hour than a car moving at 15 miles per hour because the car moving at 60 miles per hour has more A. momentum B. ) deceleration Cc. mass Incorrect Your Answer: ) [x D. @ velocity

1. In this problem, we explore the geometry of vector fields in space, focusing on one of the most fundamental examples in physics and engineering: the electric field generated by stationary electric charges. When a point charge q is located at the point x0 = (x0, y0, z0) in space, it produces an electric field E(x, y, z) at any other point x =

this science question with details for simple machines. Explanation how does each machine work? The explanations of each simple machine are clear, accurate, and provide in-depth insights into how they work and their real-world applications. Proper terms used. Define each simple machine (in science): 1st class lever, 2nd class lever, and 3rd class

A 2.5 kg mass is attached to the 0 cm mark on a 1 kg meter stick. A mass of 0.5 kg is attached to the 100 cm mark of the meter stick. The stick is rotated around an axle that is attached at the 20 cm mark. What is the moment of inertia of the system? 0.35 kg m2 0.60 kg m2 0.85 kg m2 1.2 kg m2

Which of the methods is used to detect dust in the interstellar medium? infrared radiation tachyon particles gamma rays H lines 21-cm radiation

Express 1 m in terms of cm, m, and nm. Use proper scientific notation in your answers. show your work

Please read the material at the link below before starting the assignment: https://openstax.org/books/university-physics-volume-3/pages/3-introduction need help. Remember it must be handwritten and take a picture of it. Chapter 1 - Problems 30, 36 and 44 Chapter 2 - Problems 44 and 94 Instructions: All work must be handwritten (pen or pencil).

When a person walks, their leg swings back and forth from the hip joint, resembling a simple pendulum. Suppose a person's leg, modeled as a simple pendulum, has an effective length of 0.62 meters (the distance from the hip joint to the center of mass of the leg) and total length of a leg is 1.4 meters

(1) Define a wave? (2) What happens to the frequency of the waves when you increase and decrease the vibration? (3) What happens to the wavelength when you increase and decrease the vibration? (4) What is the relationship between wavelength and frequency? (5) Define a transverse wave: (6) Give an example of a transverse wave: (7) Define a

Motion parallax refers to: Question 4 options: a) Differences in retinal disparity. b) The convergence of parallel lines at the horizon. c) Changes in pupil size. d) The fact that objects closer to us move faster across our field of view

The purpose of this CFD assignment is to make students familiar with how to run simple simulations as well as with the fundamentals of viscous flows. 2. Objectives The assignment consists of two tasks - CFD Simulation of a Flat Plate Boundary Layer Flow and CFD simulation of the flow between two parallel plates, with one plate moving

Would this work for question 1, Based on observing an object you can tell that there is a net force acting upon it because an object can be at rest or in motion. If an object is at rest the a net force is acting on it because it is on something. If an object is in motion there is also forces acting on it while it is moving

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

Which statement best compares the momentum of a 5-kilogram fish swimming at a speed of 10 meters/second and a 2-kilogram fish swimming at a speed of 10 meters/second? A. Neither fish has momentum. B. The 2-kilogram fish has more momentum. C. The 5-kilogram fish has more momentum. D. Both fish have the same momentum

The velocity vector of the ball from Candace's release has a magnitude of 6.55 m/s at an angle of 18.9 degrees above the horizontal

Part 1: Simulation Exploration is my work good 1. Open the simulation and Light Bulb option. Explore the simulation and describe what variables you can control and what happens when you adjust these controls. Enter your explanation below. Tools Available and Check: Bulb Color Flashlight Filter Color Build Options: Show human face Show brain In the

How is this, Using the concept of relative velocity would not provide an answer to the question. To calculate the Earth's speed it would need to be in relation to a chosen reference point

Blades made of wood, fiberglass, and plastic are all equally resistant to wear over time. True False

A 900 kg racing car completes one lap around a circular track of 90.0-meter radius in 12.3 seconds. What provides the centripetal force in this scenario

Which of the following statements accurately decribes the sign of the work done on the box by the force of kinetic friction? View Available Hint(s)for Part C positive negative zero

he_____is an imaginary line per pendicularto the surface of amedium where a waves strikes it

reword in simple way Electrons are described as occupying orbitals. An Orbital is a volume of space where there is high probability of finding an electron. Atomic Orbitals are mathematical functions that provide insight into the wave nature of electrons (or pairs of electrons) that exist around the nuclei of atoms. Orbit is the definite path of an

Durante la calibracin de un brazo robtico, el ingeniero de mantenimiento detecta vibraciones inusuales. Los sensores muestran que el extremo del brazo se mueve segn un movimiento armnico simple (MAS), el motor de la base realiza un movimiento circular uniforme (MCU), y al detener bruscamente el sistema, se genera un pulso mecnico que se propaga

What four conditions must be met to create a nuclear bomb from a fission chain reaction?

reply and ask a question.... I chose question 7: Give an example in which a small force exerts a large torque. Give another example in which a large force exerts a small torque. Seeing as how I work at a Toyota dealership and enjoy working on cars, this is a fitting question. A small force can exert large torque when applied at a long distance

3 Select the correct answer. What happens to an object as it absorbs radiant energy? A. Its temperature increases. B. Its temperature decreases. C. Its thermal energy decreases. D. Its potential energy increases

Explain why Newton's first law of motion is sometimes called the law of inertia.

Multiple Choice Questions[ Each Question has only one point] 1. Two forces 3N and 2N at an angle 0 such that resultant R. The first force is now increased to 6 N and the resultant become 2R. The value of 0 is A. 90 B. 120 C. 30 D. 60 2. If the sum of two unit vectors is a unit vector, then magnitude of difference is A. 1/V2 B. V5 C. V2 D. V3 3. A

P Skills Modules 4.0 Tissue Integrity Test CLOSE ati. Time Remaining: 08:14:36 Question: 2 of 8 PAUS Pause Remaining: 08:20:00 FLAG Complete the following sentence by using the lists of options. Nurses' Notes Assessment Client presents at clinic with a wound on the left upper thigh from a fall 3 The nurse should anticipate an order for a(n)

The function h equals negative 16 t squared plus 1700 gives an object's height h, in feet, at t seconds. a. What does the constant 1700 tell you about the height of the object? b. What does the coefficient of t squared tell you about the direction the object is moving? c. When will the object be 1000 ft above the ground? d. When will the object be

This question uses construction skills to determine the machine characteristics. A three-phase delta-connected synchronous induction motor is connected to a 415 volt, 50 Hz supply. The winding resistance is negligible and the synchronous reactance per phase is 4 ohms. The input power is 25 kW and the motor has a leading power factor of 0.8

The kinetic theory of gases assumes which of the following? Changes in gas temperature do not impact the speed of gas particles., Unselected, Changes in gas temperature do not impact the speed of gas particles. Gas particles are in constant, random motion., Unselected, Gas particles are in constant, random motion. There is attraction and repulsion

1. From equation 4, derive the relationship between h andsin^2 (). Let k = the slope of the graph of h vs. sin^2 (). What is the equation for the theoretical slope of the graph? (In other words, what is k in terms of,v_i et al., in this lab?) 3. Using the slope of the trend line, what is the value of the initial speed? 4. When comparing the

How do you check the charge on a lead-acid battery?

All wind energy systems require an inverter to operate. True False

True or False: In a collision, a person who slows down gradually over a greater distance will experience less force than stopping suddenly.

It is a physics question 4. A stone is thrown upwards at a velocity of 20 m s'. 5.7 (a) Find its velocities after 1 s, 2 s and 3 s. * * (b) Find the displacements at 1 s, 2 s and 3 s. (c) Find the distances it has travelled after 1 s, 2 s and 3 s

Which, if any, of the heat engines violate(s) the first law of thermodynamics? Check all that apply. (a) (b) (c) None of the above

Select the correct answer. Why might people be able to walk barefoot on hot coals of wood without burning their feet? A. low conductivity of the coals B. low temperature of the coals C. low insulation of the coals D. low convection of the coals Reset

A solenoid's magnetic field decreases linearly with time. What happens in a secondary coil wrapped around the solenoid? Group of answer choices No induced emf Induced emf proportional to the rate of change of the solenoid's field Induced emf proportional to the solenoid's resistance Induced emf only when the coils are touching

reply and ask a question... For this week's conceptual question, I chose question 19: When there is a global heating trend on Earth, the atmosphere expands and the length of the day increases very slightly. Explain why the length of a day increases. When there is a global heating trend, Earth's atmosphere expands due to the increase in

Fill in the blanks 113 Disease Process Map Disease Name: Heart failure What am I going to see during my What is happening in the body? assessment? heart is unable to pump SOB, fatique, weakness, blood efficiently Leading to ( persistent cough, rapid or inadequate circulation of blood to meet the bodys needs irregular heartbeat What trends and

In the context of transformers, what does 'step-up' mean? Option A It decreases the current flow. Option B It increases the voltage from primary to secondary windings. Option C It maintains the same voltage level. Option D It converts AC to DC

A 5 kg object is moving a 3 m/s. Calculate its momentum

If the decay constant k k of a particular radioactive isotope is 0.1 year 1 1 , what is its half-life

Ceramic cutting tools are effective for cutting harder metals because they can withstand higher temperatures and do not experience thermal shock. True False

What is torque? The force applied to an object The rate of change of angular momentum The rate of change of angular acceleration The rotational inertia of an object The rate of change of angular velocity The speed of rotation

books, and assessments that prize reasoning over linguistic fluency alone. Where contextual constraints push back, the research encourages disciplined iteration rather than one-off fixes. In short, inclusion in physics isn't an add-onit's the architecture of the learning experience (Galkien & Monkeviien, 2021; Nilholm, 2020; Carhill-Poza et al.,

Select the correct answer. Why does hot air rise and cold air sink? A. Cold air has more kinetic energy than hot air. B. Hot air has more potential energy than cold air. C. Cold air is more dense than hot air. D. Hot air is more dense than cold air

A pendulum can only be treated as a simple harmonic oscillator if Group of answer choices its maximum angle is less than about 15 degrees its maximum angle is less than about 30 degrees its minimum angle is more than about 15 degrees its minimum angle is more than about 30 degrees

2 Select the correct answer. If the spring constant is doubled, how does the period of a mass on a spring change? A. The period would change by a factor of . B. The period would change by a factor of . C. The period would change by a factor of 4. D. The period would change by a factor of

20A An object 1.0 cm tall is placed 12.0 cm in front of a convex mirror that has radius of curvature 24.0 cm. Where is the image? Is it upright or inverted? real or virtual? big or small? What is the main physics equation you will use in order to solve this problem? List the conditions under which this equation applies, along with any assummptions

Showing 100 - 200 of 497
  • 2 / 5