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A 15.0g plastic ball is dropped from a height of 2.60 m and is moving at 2.80m/s just before it hits the floor How much mechanical energy was lost during the ball's fall?
a birthday cake candle 4 cm high is 10 cm from a converging lens whose focal length is 15 cm. use a ray diagram on a
a particle with a charge of 4c and a mass of 12kg is travelling in a circular path around a fixed particle of charge
What volume of helium is needed if a balloon is to lift a load of 180 kg (including the weight of the empty balloon)? the density of the air is 1.29 kg/m3
Two particles with charges +4e and -7e are initially very far apart, which is the change in the electric potential energy
After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state, Calculate the free-fall acceleration at its surface
What is the ratio of the intensity of an earthquake wave as itpasses a point 20 km from the source tothe intensity as it passes a point 12 kmfrom the source?
a ranger in a national park is driving at 49 kmh when a deer jumps onto the road 67 m ahead of the vehicle. after a
Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth, What was the weight of the water in the tube
Certain neutron stars (extremely dense stars) are believed to be rotating at about 1000 rev/s. If such a star has a radius of 11 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation?
The energy density of radiation is 5.75E-14 j/m^3. The speed of light is 2.99E8 m/s, Determine the the corresponding electric field amplitude
A 2kg mass is loaded into a spring cannon. The cannon's spring has a constant k = 4000 abd the spring is compressed 0.8m. How far does it move before it comes to a stop
An artillery shell is red with an initial velocity of 328 m/s at 51.1 degrees above the horizontal. To clear an avalanche, it explodes on a mountainside 42.1 s after fi ring. What are the (a) x and (b) y coordinates of the shell where it explod..
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