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A box starts out at the top of a frictionless ramp, then slides down. The ramp has a height h = 4 m and a slope of 12o with respect to the ground. The box has a mass of 5 kilogram. The system is under normal gravity, so g = 9.81 m/s2. Let the potential energy be zero at the bottom. a) Find the initial gravitational energy of the box at the top of the ramp? b) Find the kinetic energy of the box at the bottom of the ramp? c) Find the total mechanical energy of the box at the bottom of the ramp? d) Find the total mechanical energy of the box at the top of the ramp? e) Find what does this make the velocity of the box at the bottom? f) Find this velocity if the box starts with a mass of15 kilogram?
A photon is emitted when a hydrogen atom undergoes a transition from the n = 10 state to the n = 4 state. Calculate values for the following. (a) the wavelength nm (b) the frequency Hz (c) the energy of the emitted photon eV
The box is cubical, measuring 0.390 m on a side, and the thickness of the walls is 3.00 10-2 m. In one day, 2.90 106 J of heat is conducted through the six walls. Find out the thermal conductivity of the box.
A small, 1.90-mm-diameter circular loop with R = 1.40×10?2? is at the center of a large 110-mm-diameter circular loop. What is the induced current in the inner loop
A 72.0-kg log falls from a height of 20.0 m into a lake. find the change in entropy of the air during this process
The Beretta Model 92S (the standard-issue U.S. army pistol) has a barrel 127 long. The bullets leave this barrel with a muzzle velocity of 334 .What is the acceleration of the bullet while it is in the barrel, assuming it to be constant?
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 6 excited state. What are the photon wavelengths of transitions
With the switch in position A, the capacitor becomes charged. After a long time, the capacitor charge approaches q = C ?. Determine the energy of the capacitor U(t) as a function of time t
q1. a 9.7 v battery is connected to a bulb whose resistance is 1.3. how many electrons leave the battery per minute?q2.
A load of bricks with mass = 15.6 hangs from one end of a rope that passes over a small, frictionless pulley. What is the magnitude of the upward acceleration
The air inside a bicycle tire pump has 151 joules of work done on it as 70.7 joules of heat is conducted away from it
The deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 volt potential difference is suddenly applied to the initially uncharged plates through a 950 ohm resistor in series with the deflection plates.
A man pulls a toboggan for a distance of 40.0 meter along the snow with a rope directed 20.0 degree above the snow. Find how much work is done if the same tension is directed parallel to the snow
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