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To test the quality of a tennis ball, you drop it onto the floor from a height of 4.02 m. It rebounds to a height of 2.84 m. If the ball is in contact with the floor for 11.1 ms, what is its average acceleration during that contact?
Light of wavelength 659.4 nm is emitted by a star. The wavelength of this light as measured on Earth is 661.4 nm. How fast is the star moving with respect to Earth
John and Joan walk in opposite directions around a circular path, starting from the same point. How long will it take for them to meet
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 440-g sample of silver at an initial temperature of 85°C is placed in the water. Calculate the mass of the aluminum cup
q1. an ambulance travelling at 39 ms approaches a car heading in the same direction at a speed of 19 ms. the ambulance
a) Use conservative of energy to find the car's speed at the top of the loop and at the bottom of the loop. b) what is the centripetal acceleration ar=V^2/r at the top of the loop and bottom of the loop
question1by means of snellrsquos law convince someone that for total internal reflection to happen that index of
A sealed container contains 7 moles of neon gas at STP. Estimate the number of neon atoms having speeds in the range from 188.0 m/s and 192.0 m/s
An object is placed 8cm in front of a converging lens with a focal length of 18cm. What is the lateral magnification
At the instant the traffic light turns green, a car that has been waiting at an intersection starts forward with a constant acceleration of 2.45 m/s2. How fast is the car traveling when it overtakes the truck
Many chemical reactions release energy. Suppose that at the beginning of a reaction, How much electric potential energy was lost in this reaction (in units of eV)
A 4 kg block rest against one end of a horizontal spring which is compressed by 20 cm. Calculate the constant of kinetic friction Mk between the block and the table
Two cylindrical metal rods-one copper, the other lead-are connected in parallel with a temperature of 22.0 C at one end, what is the diameter of the copper rod
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