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A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. how many helium atoms are in the cylinder? what is the mass of the helium?
What mass of water (at 4.0 C) can be contained in a rectangular box whose dimensions are 10 cm by 5.00 cm by 1.00 cm? The density of water at 4C is 1.000 X 10 kg/m-cubed.
A 2.00×10-2- cube of ice at an initial temperature of -19 is placed in 0.670 of water at 44.0 in an insulated container of negligible mass.
Explain the concepts behind the gravitational constant, gc. Define the constant mathematically.
A 5.00 x 10^4 kg space probe is travelling at a speed of 14000 m/s through deep space. Retrorockets are fired along the line of motion to decrease the probe's speed. The retrorockets generate a force of 4.00 x 10^5 N over a distance of 2600 km. What ..
The distance to the Andromeda Galaxy is estimated at about 2 ´ 106 light years. A light year is distance travelled by light in one year; if the speed of light is 3 ´ 108 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 ´ 107 s..
A ball with a mass of 0.75 kg is thrown vertically into the air with an initial velocity of 10 m/s. establish the velocity of the ball when it hits the ground if it was initially released 2.0 m above the ground.
A stone with a mass of 0.900 kg is attached to one end of a string 0.900 m long. The string would break if its tension exceeds 60-N. The stone is whirled in a horizontal circle on a frictionless tabletop.
A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6m/s in 2 seconds. how much force was exerted on puck? how much on the stick.
A 0.144 kg baseball is pitched horizontally at +38 m/s and after it is hit by the bat it moves horizontally at -38 m/s.
In a physics lab, a cube slides down a frictionless incline and elastically strikes another cube at the bottom that is only 1/4 its mass. If the incline is 35 high and the table is 95 off the floor, where does each cube land.
As part of a safety investigation, two 1900 kg cars travelling at 19 m/s are crashed into different barriers. Determine the average forces exerted on (1) car that hits a line of water barrels and takes 1.7 s to stop, and (2) car that hits a concre..
A 25.0g arrow is shot through a 7.8 cm apple. If the arrow enters the apple at 38.8 m/s and emerges with a speed of 30.10m/s in the same direction, what is the magnitude of force with which the apple has resisted the arrow.
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