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A ball has a diameter of 3.89 cm and average density of 0.0844 g/cm3. What force is required to hold it completely submerged under water?
A car misses a turn, sinks into a shallow lake, coming to rest on its side with the door horizontal and at a depth of 9.3 m. find the force exerted on the inside of the door by the air
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
Calculate each star's speed, and state whether it is moving toward or away from us.
A car moves with an initial velocity of 5m/s and is subjected to a deceleration of 3m/s2 for 2 seconds. Calculate the distance the car traveled
Ray decides to paint the outside of his uncle's house. He uses a 4.0-m-long board supported by cables at each end to paint the second floor. find the force that the right cable exerts on the board
assume that friction is so small that it can be ignored. a force toward the right of constant magnitude is applied to
Lithium, beryllium, and mercury have work functions of 2.30eV,3.90eV, and 4.50eV respectively. Find the maximum kinetic enery for the photoelectrons in each case
A girl whirls a stone in a horizontal circle of radius 1 m at a height of 1.5 m above the ground. Find period of revolution
A supertrain of proper length 97 m travels at a speed of 0.91c as it passes through a tunnel having proper length 50 m. As seen by a trackside observer, is the train ever completely within the tunnel? Yes No If so, how much room does it have to spare..
When blue light of wavelength 465 nm illuminates a diffraction grating, it produces a 1st order utmost but no 2nd order maximum.
A car dealer claims that his product will accelerate at a constant rate from rest to a speed of 200 km/hr in 8s. What estimated distance will the car travel.
Find out that the value of the gravitational field strength
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