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Q1. A 67 {rm kg} swimmer climbs onto the Styrofoam block whose density is 140 {rm kg/m^ {3}}.If the water level comes right to the top of Styrofoam, what is the block's volume?
Q2. In order to clearly read a book 24 cm away, a farsighted girl needs an image to be 35 cm from her eyes. What focal length is necessary for lens in her eyeglasses?
A ski jumper has 1.2 ´ 10 J of potential energy at the top of the ski jump. The friction on the jump slope is small, but not negligible. What can you end about the ski jumper's kinetic energy at the bottom of the jump.
Find out the friction force on the box
He would like a prescription for contact lenses to serve the same purpose. What is the exact contact lens prescription, in diopters.
Which state is best illustrates kinetic friction
What is the y component (in Newtons) of F
How to find out the elapsed time
A force vector points at an angle of 50.6° above the +x axis. It has a y component of +280 newtons. Calculate the magnitude of the force vector.
If a car travelling at 63 km/h will skid 18 m when its brakes lock, how far will it skid if it is travelling at 150 km/h while its brakes lock.
The impact on light fixture swing
What is the pressure inside the thermos
Find out the minimum sound intensity
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)
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