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Determine the specific heat capacity of an unknown sample of metal. mass of metal = 100 g temperature of metal = 100 C mass of water = 100 g temperature of water = 20 C Specific Heat of Water 4.18 J/g-K Final Temp of Water and Metal = 28.69 C
A 1590 kg car starts from rest on a horizontal road and gains a speed of 61 km/h in 30 s (a) what is its kinetic energy at the end of the 30 s.
An electric motor with a 4.7-hp output drives a machine with an efficiency of 30%. What is the energy output of the machine
The velocity of a ball changes from m/s to m/s in 0.02 s, due to the gravitational attraction of the Earth and to air resistance. What is the rate of change of momentum of the ball
Two rockets approach earth from opposite directions at equal speeds relative to the earth. How fast are the rockets moving with respect to the earth
You hit a 0.2 kg golf ball up at 40o from the horizontal. It travels for 4.86 s and stops on an elevated green 10 m above its initial height traveling down at an angle of 35.4o below the horizontal
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
In a two-slit interference experiment, with the sits 0.041 mm apart and screen at a distance 75 cm, What is the wave length of the light
A 9-g bullet is fired from a rifle. It takes 3.30 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
A VW Beetle goes from 0 to 65.7 mi/h with an acceleration of +2.34 m/s^2. Find the acceleration of the dragster
Find the maximum height reached by the 2.70 {rm kg} object. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57.
A 60.0 g bullet is fired from a muzzle velocity of 525 m/s from a gun with mass 4.50 kg and a barrel length of 55.0 cm, Find the bullet's momentum as it leaves the barrel
For the third circuit, consisting of a single battery and two light bulbs in parallel, how does the brightness of the bulbs compare to the first circuit, What is the current through each bulb
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