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Find the Center of Mass of hammer which has an iron head of 0.5 kg and a wooden handle of 0.1 kg. To simplify the calculation suppose that the head has the shape of a cuboid of dimensions 1/6 m x 2 cm x 2 cm. suppose similarly that the handle is a cuboid of dimensions 1/3 m x 2 cm x 2 cm. suppose finally that the head rests on the handle like a symmetrical "T".
Starting from rest, two skaters "push off" against each other on smooth level ice, where friction is negligible. One is a woman and one is a man. find the recoil velocity of the man relative to the ice
A person 1.7 m tall is standing 2.50m in front of a camera. Find the magnification and the height of the image on the film
A noisy grinding machine in a factory produces a sound intensity of 1.40 multiply.gif 10-3 W/m2. Calculate the decibel level of this machine
To examine a particular blood sample in biology lab, a student uses a compound microscope set to have a magnification of -4530. What is the distance between the blood sample and the objective lens
a single mass m1 3.6 kg hangs from a spring in a motionless elevator. the spring constant is k 294.0 nm. now three
A spaceship needs to change its course by angle ?. The ship's engines can exert a force F in any direction. For how long do the engines need to remain on
If 22.0g of the metal gallium melts in your hand, what is the change in entropy of the gallium in this process? What about the change in entropy of your hand
An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. The vehicle then slows at a constant rate of 1.0 m/s2 until it stops. (a) How much time elapses from start to stop? (..
A transformer for an answering machine takes an ac voltage of amplitude170V as its input and supplies a8.4V amplitude to the answering machine. How many turns does the secondary have
calculate the number of moles in the 2.00 L volume of air in the lungs of the avg person. (Air=37.0 degree Celcius)
A ball of mass 0.40 kg moves horizontally at a velocity of 25.0 m/s. What was the average force exerted on the ball by the wall
An airplane propeller is rotating at 1250rpm, Compute the propeller's angular velocity in rad/s
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