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To find the height of an overhead power line, you throw a ballstraight upward. The ball passes the line on the way up after0.60 s, and passes it again on the waydown 1.2 s after it was tossed.
What is the height of the power line? and
What is the initial speed of the ball?
the intensity of a laser beam is 450 wm2. what is the rms value of the electric field of this laser beam? careful-rms
A 4.00 kg model rocket is launched, expelling 46 g of burned fuel from its exhaust at a speed of 590m/s. What is the velocity of rocket after the fuel has burned? Hint: overlook the external forces of gravity and air resistance.
A technician wraps wire around a tube of length 33 cm having a diameter of 8.1 cm. what is the self-induced emf in the solenoid
A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 14.5 cm. Find the initial velocity of the ball before the collision
two disks are mounted on low-friction bearings on the same axle and can be brought together so that they couple and
If the engine absorbs 141.0 kcal of heat from the hot reservoir, how much does it exhaust to the cold reservoir
Positive electric charge is distributed in the shape of an infinitely long insulating cylinder of radius R and volumetric charge density ?=?0(1-r/R), Find an expression for the linear charge density
A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0, what is its closest approach to the surface of the nucleus
Compute the quantum length (thermal de Broglie wavelength) in nanome-ters and the chemical potential in electron volts of 4He gas at room temperature and pressure
An electron is released to accelerate from point 1 to point 2 in a potential region. The electric potentials at these points are V1 = -35 V and V2 = +200 V. Calculate the change in potential energy of this electron
A lighthouse sweeps its beam of light around in a circle once every 6.0 s. To an observer in a spaceship moving away from Earth, What is the speed of the spaceship relative to Earth
a particular organ pipe can resonate at 240 hz, 400 hz, and 560 hz, What is the fundamental frequency of the pipe
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