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what is the momentum of a 1800-kg car traveling with a speed of 27m.s (60mph)?
How does the frequency of harmonic motion change if we take a spring of seven times the modulus, increases or decreases by a factor of how much
How many protons hit the target. How much energy is delivered to the target each second if the protons each have a kinetic energy of 30 MeV and lose all of their energy in the target.
A 500- kg ice boat moves on runners on essentially frictionless ice. A steady wind blows, What was the force due to the wind
A spring with constant k=15 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. it is then pulled down 6 cm and free. if the ball makes 30 oscillations in 20 seconds, what are its maximum speed.
A certain substance has a mass per mole of 36 g/mol. When 319 J is added as heat to a 35.0 g sample of this material, How many moles of the substance are present
When a surfer rides an ocean wave on her surfboard she is actually riding on. a. a crest that is toppling over. b. a trough of the wave. c. The rest position of the wave. d. A region of rarefaction.
A particle undergoes a displacement Δr of magnitude 57 m in a direction 25° below the x axis. Express Δr in terms of the unit vectors x and y.
Electrons are ejected from a metallic surface with speeds ranging up to 4.60 × 105 m/s when light with a wavelength of 625 nm is used. a)What is the work function of the surface? b) What is the cutoff frequency for this surface?
A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. The brother's outstretched hand catches the keys 1.20 s later.
During a crash test, a car moving at 60 km/ hr collides with a rigid barrier and comes to a complete stop in 200 ms.
A 12 kg weather rocket generates a thrust of 250 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 560 N/m, is anchored to the ground. What is the rocket's speed while the s..
A nonreflective coating (n = 1.40) covers the glass (n = 1.52) of a camera lens. Assuming that the coating prevents reflection of a specific wavelength (vacuum = 535 nm), find the minimum nonzero thickness that the coating can have.
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