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A hockey puck moving at 34 m/s slams through a wall of snow 39 cm thick. It emerges moving at 20 m/s. Assuming constant acceleration, find the time the puck spends in the snow. Assuming constant acceleration, find the thickness of a snow wall that would stop the puck entirely.
An electric motor can accelerate a Ferris wheel of moment of Inertia I=20,000kg m2 from rest to 10rev/min in 12second. Find what power is required to maintain this rotational speed
A piece of copper wire has a resistance per unit length of 6.45 10-3 ?/m, Find the magnetic field strength at the center of the coil
Suppose that the coefficient of kinetic friction between Zak's feet and the floor, while wearing socks, is 0.250. Knowing this, Zak decides to get a running start and then slide across the floor.
What is the kinetic energy of an hour hand? Consider both a wristwatch and Big Ben (the clock on the tower at the Palace of Westminster in London). How do the two kinetic energies compare to each other?APA format with references.
a 55 kg man stands still in an elevator moving with a constant speed of 2.0ms.aif the down going elevator comes to rest
A car accelerates from 0 to 30 mph in 1.5s. How long does it take for it to accelerate from 0 to 60 mph, assuming the power of the engine is independent of velocity and neglecting friction?
two converging lenses each of focal length 15.2cm are placed 40.9cm apart and an object is placed 30.0 cm in front of
When a resistor is connected across the terminals of an acgenerator (107 V) that has a fixedfrequency, there is a current of 0.495 Ain the resistor. When an inductor is connected across the terminals of this same generator, there is a current of 0..
A college student produces about 135 kcal of heat per hour on the average. What is the rate of energy production in watts
The electrons in a rigid box emit photons of wavelength 1484 nm during the transition. How long is the box in which the electron are confined
Two capacitors, C1 = 4.0mF and C2 = 9.0mF , are in series, Find the potential difference across second capacitor and Find the charge stored on the second capacitor
An aluminum wire having a cross-sectional area of 4.00 3 1026 m2 carries a current of 5.00 A. Find the drift speed of the electrons in the wire
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