A sharpshooter fires a rifle while standing with the butt of the gun against his shoulder. If the forward momentum of a bullet is the same as the backward momentum of the gun, why isn’t it as dangerous to be hit by the gun as by the bullet?

Q: Show that the kinetic energy of a particle of mass m is related to the momentum p of that particleby...

A: Given data The mass is of the particle is m The velocity of the particle is, v   The momentum of the...

Q: When light goes from a more dense medium to a less dense one,

A: Refraction is the phenomena of light in which light bends when passing through one transparent mediu...

Q: You can often see a reflection when looking at a sheet of glass, particularly if it is darker on the...

A: It occurs because a double image is formed due to recurred reflection from the front as well as the ...

Q: A pebble is thrown into a 15.0 meter deep well with a speed of 2.65 m/s a) how long does the pebble ...

A: Given data: The height of the well, S=15.0 m. The initial speed of pebble, u=2.65 m/s. a) Newton's...

Q: Normal radiofrequency wavescannot penetrate more than a few meters below the surface of theocean. On...

A: Frequency, f = 10 kHz = 10000 Hz speed, c = 3 x 108 m/s 

Q: What is tangent law of magnetism?

A: The tangent law of magnetism is a way of measuring the strengths of two perpendicular magnetic field...

Q: An electric field in a region of space is parallel to the x axis. The electric potential varies with...

A: The electric field is the slope of the electric potential versus position graph , that is E=-Vf-Vixf...

Q: 3. A 2.0 kg object is suspended using a cable that passes over a pulley of radius 0.50 m. The cable ...

A: a) Consider the following figure which depicts the given situation. Let the acceleration of the obj...

Q: 4. A mass, m, is suspended from a vertically oriented spring, with constant, k. A downward impulse, ...

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...

Q: Define about Bose-Einstein distribution ?

A: The Bose-Einstein distribution describes the statistical behavior of integer spin particles. At low ...

Q: 1. Why is it important to separate material from a mixture? 2. What technique would you use to separ...

A: SOlution:

Q: How do you define 'Static Stability Limit'of an alternator ?

A: The alternator is defined as the device or an electric generator which is used for producing alterna...

Q: You take a wonderful pendulum clock to your mission toMars. Which length does the pendulum need for ...

A:

Q: A 9,300 mg. railroad car traveling at a velocity of 15/ms strikes a second boxcar at rest. If the tw...

A: Given,     Railroad car -m1=9300kg     with velocity-v1=15m/s                           v2=6m/s   Le...

Q: **37. Two particles are located on the x axis. Particle 1 has a mass m and is at the origin. Particl...

A: Case 1: When particle 1 and particle 2 are separated by the distance L. The free body diagram is giv...

Q: In a crash test, a car of mass 1500 ?? collides with a wall and rebounds as in the figure. The initi...

A: Impulse acting on an object is equal to the change in momentum of the object. It is given by the for...

Q: What is the peak current through a 500-W room heater that operates on 120-V AC power?

A: Given data The power of the heater is given as P = 500 W. The voltage is given as V = 120 V.   The...

Q: The wheel shown is rolling to the right without slipping. Rank in order, from fastest to slowest, th...

A: Translational motion -  Motion in which object shifts from one point in space to another.  Rotationa...

Q: Please help me to solve all of the questions below, I couldn't understand from my teacher! That's al...

A: Given that: Charge on particle                     q = -5μC  = -5×10-6C Displacement from A to B    ...

Q: Starting with the definition of work, prove that at every point on an equipotential surface, the sur...

A: From the definition of work done, the work done by the conservative forces is equal to the change in...

Q: The specific heat at constant volume of a particular gas is 0.182 kcal/kg.k at room temperature and ...

A: Specific heat at constant volume, CV = 0.182 kcal/kg.KMolecular mass, M= 34 kg/molUniversal Gas Cons...

Q: An irregularly shaped object weighs 10.0 N in air. When immersed in water (density of water = 1000 k...

A: weight in air = 10 N  Weight in water = 4 N

Q: A lead bullet of mass m = 10.0 g is travelling with a velocity of V0 = 100 m/s when it strikes a woo...

A:   By Law of conservation of linear momentum,             m1u1+m2u2=m1v1+m2v2 (a) Using the law of co...

Q: A person walks 2.80 km north and then 2.00 km east, all in 2.20 hours.   (a) What is the magnitude (...

A: Draw the figure of the problem.

Q: If a car traveling 50 m/s stops in 1s how much is the car acceleration

A: Given:Speed,u=50 m/sTime, t=1 sInitial speed,v=0 m/sFind how much is the car acceleration.Now,The de...

Q: (II) An organ is in tune at 22.0°C. By what percent will the frequency be off at 11°C?

A: The velocity of the sound at 22oC is: v1=344+0.622v1=357.2 ms ....(1) The velocity of the sound at 1...

Q: When a CD is held at an angle, the reflected light containsmany colors. What causes these colors?(a)...

A: When a CD is held at an angle, the reflected light containsmany colors.

Q: The sides of a small rectangular box are measured to be 1.80 ± 0.01 cm , 2.05 ± 0.02 cm, and 3.1 ± 0...

A: Expression for the volume of a rectangular box is V=lbh Substitute V=1.80 cm2.05 cm3.1 cm=11.439 cm3...

Q: Hi! This was answered here before but it was wrong, I was told that I should set-up an equation for ...

A: (A) The work done on a cargo, when it reaches half the height of the incline from the ground is, W=F...

Q: The switch S is closed at t = 0. Which statements about the following RL circuit are true? (Assume a...

A: In the given circuit when immediately after the switch is closed, the inductor will offer more resis...

Q: The length of nylon rope from which a mountain climber is suspended has a force constant of 1.40X104...

A:

Q: (II) A bat at rest sends out ultrasonic sound waves at50.0 kHz and receives them returned from an ob...

A: Given: Frequency of bat = 50 Hz velocity =27.5 m/s received sound frequency = ?  

Q: A parallel plate capacitor consists of two rectangular plates, each with an area of 4.5 cm2 and are ...

A: The energy stored in the capacitor can be determined as, Here, C and V represent the capacitance an...