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A car starts from rest and travels for 4.92 s with a uniform acceleration of +1.49 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.09 m/s2. If the brakes are applied for 3.02 s, how fast is the car going at the end of the braking period? How far has the car gone?
A ball of mass 0.200 kg has a velocity of ; a ball of mass 0.300 kg has a velocity of . They meet in a head-on elastic collision. Proof that the collision was elastic
A mass M=171 kg is suspended from the end of a uniform boom. The boom (mass=69.0 kg, length=3.60 m) is at an angle %u03B8=69.0 deg from the vertical, Calculate the tension in the horizontal cable
A point charge is outside of a spherical surface and no charge is enclosed by that surface, What is the flux through the entire closed surface
Standing on the surface of a small spherical moon whose radius is 6.85·104 m, What maximum height above the surface of the moon will the rock reach
A 11.0 cm -diameter compressed-air tank is 70.0 cm tall. The pressure at 30.0 degrees C is 130 atm. How many moles of air are in the tank
An insulated Thermos contains 131 cm3 of hot coffee at 82 °C. You put a 12g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though ..
A model rocket launches with an initial velocity of 6 m/s, at an angle of 88 degrees (with respect to the horizon). What is the maximum height attained by the rocket
A 4.5kg squid takes in 1.75kg of water while at rest, and then expels the water at a speed of 3.5m/s, calculate the work done by the squid's muscles during this process
Jill jumps off the diving board with a velocity of 1.7 m/s at 38 degrees above horizontal. if the water surface is 2 meters below the board: with what velocity will she hit the water
An object has a kinetic energy of 303 J and the momentum of magnitude 22.9 kg·m/s. Find the speed and the mass of the object.
A loudspeaker of mass 19.0 kg is suspended a distance of = 1.60 m below ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 3.30m . What is the tension in each of the cables.
What is the average electric field strength in this region?
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