Physics Question

Q: How much work is required to lift a 6.0-kg backpack 1.5 m to put it on? Show work.

A:

Q: The starter motor of a car engine draws a current of 190 A from the battery. The copper wire to the ...

A: The formula for the current flowing through a wire is;

Q: 25. An object of mass m, hangs from a string that passes over a very light fixed pulley P, as shown ...

A: Free body diagram of mass pulley system.

Q: Find the change in entropy of the helium when it is heated from 300 K to 1000 K at constant pressure...

A: Initial temperature of the helium gas,Final temperature of the helium gas,

Q: A large centrifuge is used to expose aspiring astronauts to accelerations similar to those experienc...

A:

Q: A high-speed railway car goes around a flat, horizontal circle of radius 480 m at a constant speed. ...

A: (a)Vertical component of force is equal and opposite to normal force. Hence, they cancel each other....

Q: A torque 151 N m is applied to the centrifuge to increase its angular velocity to 3500 rev/min in 45...

A: Angular acceleration is,

Q: CSM.10 One way to measure nuclear radii is to determine the initial speed that a proton fired at a n...

A: Given information:Radius of the nucleus (r) = 6 fm = 6 × 10-15 mNo of protons in the gold nucleus (n...

Q: A bobsled zips down a frictionless ice track starting at 150 m vertical distance up the hill. What i...

A: Given information:Initial velocity of the sled (u) = 0Total height of the mountain (H) = 150 mThe he...

Q: A block of mass 4.0 g is attached to the three springs connected as shown in the figure. Determine t...

A: Given:Mass of the block = 4 g

Q: A force of 30 N stretches a spring 0.73 m from equjilibrium.  What is the value of the spring consta...

A: In this figure the first part is show the block is in the equilibrium where x = 0. When 30 N force i...

Q: A disk between vertebrae in the spine is subjected to a shearing force of 600 N.  Find its shear def...

A: Given

Q: 43. In Example 5.7, we pushed on two blocks on a table. Sup- QC pose three blocks are in contact wit...

A: a)       The free body diagram for all the three masses are as follows,

Q: mass m is fixed to Pendulum A simple pendulum consisting of a point 1. the end of a massless rod (le...

A: Given:Mass of the pendulum = mLength of the rod = l

Q: On average, how much energy do humans radiate each second?

A: If we assume that total energy emitted by human is in form of heat then total heat emitted per secon...

Q: A baseball is thrown by the center fielder (from shoulder level) to home plate where it is caught (o...

A: Given:A baseball caught by the catcher which is thrown by the center fielder of same shoulder level....

Q: A fire engine moving at a speed of 34.0 m/s and blows the siren with a frequency 290 Hz. A truck is ...

A: Given thatSpeed of listener VL=14.0m/sSpeed of the source Vs=34.0m/sVelocity of the sound in air V= ...

Q: I do not understand how the professor came to the conclusion for the Vcenter equation.

A: The potential at the center of the square would be given by the sum of individual potentials at the ...

Q: Calculate the strength of the magnetic field if the angular frequency of an electron is 5.93x10 rad/...

A: Angular frequency of electron is,

Q: The number of electrons excited in an element of band gap 2.12 eV is 2.09 x106.Calculate the frequen...

A: The expression for the frequency is,

Q: A heavy block of mass 625 kg is suspended by a cable is moving downwards with an initial velocity of...

A: Net force is,

Q: Part A and B please. Each combination of capacitors between points a and b in the figure (Figure 1) ...

A: Given information:The potential across which the capacitors are charged (V) = 120 VCapacitance of th...

Q: 3. A plane, travelling from city A to city B located 100 miles north from city A, encounters a west ...

A:

Q: Part 1: Success in science is mainly linked to emphasis on  a) philosophical discussions  b) luck  c...

A: Science means description of the functions of the nature in a logical way and in way that this descr...

Q: Two blocks are connected by a massless rope. The rope passes over an ideal (frictionless and massles...

A: Consider the acceleration of the first block, that move along the horizontal, be a1, and the acceler...

Q: suppose you collected a data set in which you measured fall-times for different fall-heights, you pl...

A:

Q: Determine the force that the basketball exerts on your hands while you are catching it. Assume you d...

A: Given:Mass of basketball, m = 0.625 kgHeight of the basketball, h = 2.2 mInitial velocity of the bas...

Q: PLEASE HELP

A: a)Displacement vector joins an object’s final position with its initial position and is directed alo...

Q: Suppose that an airplane flying 60 m/s, at a height of 300m, dropped a sack of flour. How far from t...

A: Consider the initial speed of sack be u, the initial speed of plane be v, the vertical displacement ...

Q: Boxes of toys are dropped to children from a helicopter travelling at a speed of 80.0 m/s in a direc...

A: Consider the distance at which the pilot should release the boxes be x, the time taken by the boxes ...

Q: How to solve??

A: Absolute pressure at A is,

Q: A machine part has the shape of a solid uniform sphere of mass 225 g and diameter 3.30 cm . It is sp...

A: The angular acceleration is,

Q: A coin slides over a frictionless plane and across an xy coordinate system from the origin to a poin...

A: Work done is,

Q: What is the final temperature of the mixer of 50 g of steam at 100°mixed and 170 g of ice at its mel...

A:

Q: We were given the diagram pictured and asked to solve for T1 and T2. I did the work pictured but was...

A:

Q: A boy shoves his stuffed toy zebra down a frictionless chute. It starts at a height of 1.11 m1.11 m ...

A: According to the law of conservation of energy, states that sum of the potential energy and kinetic ...

Q: Calculate the relativistic momentum of a particle of mass 1.76x10 kinetic energy is equal to three t...

A: Given,

Q: Two cars are driving at the same constant speed on a straight road, with car 1 in front of car 2. Ca...

A: Given:Distance traveled by the car 1 before stopping = 11 m

Q: If you determine that the resistance of a resistor is 33 Ω, what does that tell you about the resist...

A: According to the Ohm’s Law:Potential difference across the ends of a resistor is directly proportion...

Q: An acrobat with a mass of 41-kg jumps on a trampoline.  What force does a trampoline have to appl...

A: Given:Mass of acrobat, m  = 41 kgAcceleration of acrobat, a = 7.5 m/s2 Acceleration due to gravity, ...

Q: Two projectiles are launched at 100 m/s, the angle of elevation for the first being 30 ° and for the...

A: Given information:Angle of projection of first ball (θ1) = 300Angle of projection of second ball (θ2...

Q: In Section 1.4, we considered the collision of a karate expert’s hand with a concrete block. Based o...

A:

Q: A playground merry-go-round has radius 2.80 m and moment of inertia 2900 kg⋅m2 about a vertical axle...

A: The amount of work done by the child on the merry go round is equal to the change in rotational ener...

Q: A= 150g, 45 degrees  B=200g, 0 degrees  C= 150g, 270 degrees  1. Record you’re given values of the v...

A: Given:A = 150g, 45 degrees B =200g, 0 degrees C = 150g, 270 degrees 

Q: One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While you...

A: Given:For first ball, θ1 = 68οinitial velocity for both the balls, u = 20.5 m/sfor second ball, θ2 =...

Q: Let R Sx TŤ and e tails at the same point. Which of the following is NOT true? 90° is the angle betw...

A:

Q: In driving a vehicle, would you prefer to use materials for the contact between the wheels and the r...

A: While driving a vehicle, it would be preferred that the coefficient of friction will be large betwee...

Q: Find the energy stored in the magnetic field of an indicator having inductance 12.5 mH carrying the ...

A: The expression for the energy stored in the magnetic field is

Q: You are driving toward a stationary siren that produces a sound of 100 Hz. While approaching it at 2...

A: Given:Frequency of the source, n = 110 HzObserved frequency = 107 HzSpeed of the observer = 25 m/sSp...

Q: A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a spe...

A: