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A 0.15 kg baseball moving at +20.00 m/s is slowed to a stop by a catcher who exerts a constant force of -385 N. A) how long does it take this force to stop the ball? B) how far does the ball travel before stopping?
A small glider is placed against acompressed spring at the bottom of an air track that slopes upwardat an angle of 33.0 degrees above the horizontal. The glider has mass 7.00×10−2 kg. The spring has600 N/m and negligible mass.
The current flowing in Ring 2 produces its own magnetic field, which in turn induces an emf in Ring 1, el. How much is this? In which direction does this current flow?
When a guitar string is sounded along with a 434Hz tuning fork, a beat frequency of 1.00Hz is heard. When the same string is sounded along with a 426Hz tuning fork, the beat frequency is 9.00Hz. What is the frequency of the string?
A certain superconducting magnet in the form of a solenoid of length 0.30 m can produce a magnetic field of 13.0 T in its core when its coils carry a current of 105 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find o..
Graph light intensity, 1/R vs. angle between polarization axes. If you buy polarizing sunglasses how can you be sure they are truly polarized
A 20 kg satellite has a circular orbit with a period of 2.4 h and a radius of 8.0 Ã- 106 m around a planet of unknown mass. what is the radius of the planet
an electric field of 210000 nc points due west at a certain spot. what is the magnitude of the force that acts on a
Your friend places a cup of coffee on the roof of her van while and accidently drives off with the coffee cup still on the roof. find what is the maximum acceleration the van can have without causing the cup to slide? Neglect the effects of air resis..
The electron concentration in a doped silicon sample at T=300K is n0 = 5x104 cm-3. Decide the whole concentration, p0. Is this material n-type or p-type? Discover the position of the Fermi level.
Force from crutches. A patient with a broken leg stands using a pair of crutches. The crutches support 75% of the 81 kg patient's weight. Find the force each crutch applies to the patient
How far does the water travel with your thumb over the end of the hose (assuming the height and angle remain the same)
A diver on a diving board is undergoing simple harmonic motion. Her mass is 55.0 kg and the period of her motion is 0.800 s. What is his mass if the mass of the board is negligible
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