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Salem weighs approximately 57 kg. He is jumping on a trampoline in his backward. As he is descending, his speed as he hits the trampoline is 4.3 m/s, and he comes to a stop in 0.20 seconds. What is the average magnitude of the force exerted on Salem by the trampoline?
A positron is a particle of "antimatter"; it has the same mass as an electron (9e-31 kg), but its charge is positive instead of negative. At research facilities such as Cornell Electron Positron Storage Ring at Cornell University in New York, high..
A reflecting telescope has a main mirror with fM = 570 mm. If an eyepiece with a magnification of 45 is used, what is the total magnification of the telescope
A toy battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. What is the value of R? What is the internal resistance of the battery?
A step-down transformer is used for recharging the batteries of portable electronic devices. Find the power delivered to the DVD player
A thin film of alcohol (n = 1.28) lies on a flat glass plate (n =1.54). What is the thickness of the film
A charge of 25 nC is uniformly distributed along a circular arc, What is the magnitude of the electric field at the center of the circle along with the arc lies
An airplane propeller is 2.02 min length (from tip to tip) with mass 109 kg. The propeller is rotating at 2000 rev/min about an axis through its center. What is its rotational kinetic energy
An electron is shot horizontally (x direction) with velocity of 2.2x10^5 m/s into a region with a uniform electric field of 10000.0N/C in the positive Y direction. What is its position(x and y) in 1.25 seconds?
A 130-g bullet is fired from a rifle having a barrel 0.654 m long. Choose the origin to be at the location where the bullet begins to move. Determine the work done by the gas on the bullet as the bullet travels the length of the barrel
A banana has 0.45 g of potassium. 0.0117% of that potassium is 4019K, What is the activity of the banana
what is the average age of a bone that has 85 beta emissions per minute from a 20 g of carbon found in that fossil. half life time of carbon-14 is 5730 years
A 0.150-kg frame, when suspended from a coil spring, stretches the spring 0.070m . A 0.200-kg lump of putty is dropped from rest onto the frame from a height of 30.0cm.Find the maximum distance the frame moves downward from its initial position.
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