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A car starts from rest and accelerates at a rate of 9 m/s2
for 4 seconds and then accelerates (brakes) at a rate of -3 m/s2for 2 seconds. How far did the car travel in 6 s?
A 2.80 kg gold bar at 98 degrees celcius is dropped into 0.34 kg of water at 23 degree celcius. what is the final temperature? assume the specific heatof gold is 129 J/kg
An 91kg man drops from rest on adiving board 3.0m above the surface of the water and comes to rest0.55s after reaching the water. What is the net force on the diveras he is brought to rest
A 5.61-mm-high firefly sits on the axis of, and 10.3 cm in front of, the thin lens A, whose focal length is 6.99 cm. Is this image upright or inverted with respect to the firefly
An ice cube of mass ma and specific heat Ci is initially at temperature T1, where T1 is less than 273K. If L is the latent heat of fusion of water, and the specific heat of water is Cw, how much energy is needed to convert the ice cube to water at ..
A 2.0 mm diameter plastic bead is charged to - 1.0nC. A proton is fired at the bead from far away with a speed of 1.0x10^6 m/s, What is the impact speed
a small glass bead charged to 6.6 nc is in the plane that bisects a thin uniformly charged 10-cm -long glass rod
A box of 20 kg is pushed up a 15 degree frictionless incline plane at a uniform speed. The applied force on the box is directed at a 20 degree angle from the horizontal. Draw a force diagram for the box.
You are with 11 other people on a boat at rest in frictionless water. The group's total mass is 858kg, How far does the boat move
question a styrofoam box has a surface area of 0.81 m2 and a wall thickness of 2.0 cm. the temperature of the inner
the position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t], velocity and acceleration of the cart
An object is placed at a distance of 40 cm from a thin lens. If a virtual image forms at a distance of 50 cm from the lens, on the same side as the object, what is the focal length of the lens?
(a) How many times does PSR 1937+21 rotate in 77.0 days? (b) How much time (in s) does the pulsar take to rotate 5.00 × 106 times and (c) what is the associated uncertainty, in s?
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