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In a volcanic eruption, a 2400-kg boulder is thrown vertically upward into the air. At its highest point, it suddenly explodes into two fragments, one being three times the mass of the other. The lighter fragment starts out with only horizontal velocity and lands 274 m directly north of the point of the explosion. Where will the fragment land? Neglect any air resistance.
A 50 kg child jumps into a small pool of water through a distance of 3 m and aquires 1000 J of kinetic energy. Assuming all of this energy goes into heating 10 kg of water in the pool, what is the change in temp of the water?
what is the diameter of the copper rod. Pull horizontally on a crate with a force of 140 N and it slides across the floor in a dynamic equilibrium. How much friction is acting on crate.
A firefighter on the back of the fire engine hears the sound waves after they are reflected from the wall. What is the frequency of this reflected wave as heard by this firefighter
An elevator has mass 540 , not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 19.5 (five floors) in 16.2 , What is the maximum number of passengers that can ride in the elevator
A 50 g aluminum calorimeter contains wter at a temperature of 26 C. When 75 gof lead at a temperature of 85 C is dropped into the calorimeter, How much water was in the calorimeter can
A 150- crate, starting from rest, is pulled across a floor with a constant horizontal force of 360 . For the first 11 the floor is frictionless, and for the next 11 the coefficient of friction is 0.31. Illustrate what is the final speed of the c..
Suppose a friend asks to examine the 10.0 kg box you were Given, hoping to guess what is inside; and you respond, Calculate the magnitude of the upward force FN exerted by the table on the box
Practical steam engines utilize 475°C steam, which is later exhausted at 300°C. What is the overall efficiency of the two engines
Light enters a 10 cm thick, parallel face, glass block at normal line drawn through the block. The angle of incidence for the light is 30 degrees. What is the index of refraction of the prism
a parallel-plate capacitor has plates with an area of 1.3times10?2m2 and a separation of 0.83mm. the space between the
A 20 kg piece of steel pipe that is 20 cm in diameter, 80 cm long, What is its angular velocity and its total kintetic energy
A car with energy absorbing bumper hits a tree. The mass of the car is 1500kg, the initial velocity was 10 m/s. What was the energy absorbed
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