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Air in a cylinder is compressed to one-tenth of its actual volume without change in temperature. Explain what happens to its pressure? Imagine now that a valve is opened in order to restore the initial pressure value. Obtain what percentage of the molecules has escaped?
A car is travelling at 24 m/s while the driver spots a large pothole in the road a distance 35 m ahead. She immediately applies her brakes. If her acceleration is -4.30m/s2, does she manage to stop before reaching pothole? What is the stopping dis..
The isotope 15N undergoes radioactive decay to form 15C. What charged particle is emitted in the decay process? how much kinetic energy in MeV is given to the particle
a car is driven along a circular track. the track road is flat. the car starting from rest increases its speed
A planetary probe is designed to drop the vehicle's instrument package from a height of 20 meters above the planet's surface, Evaluate the acceleration due to gravity at the surface of the planet
Find the angle required to produce this alignment of . (Assume the pulleys are ideal.) Find out the magnitude of the force, that is applied to the femur in this case.
A car movig with an initial velocity of 29.6 m/s decrease to a velocity of 17.9 m/s over a time interval of 4.08 seconds. how far did the car travel during this time
point p is at a potential of 540 kv and point s is at a potential of 250 kv. the space between these points is
The technique known as potassium-argon dating is used to date old lava flows and thus any fossilized skeletons found in them, What is the age of a piece of solidified lava with a 40Ar/40K ratio of 0.34
It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s. What is the passenger's weight before the elevator starts moving
A 240kg block with mass density of 1200kg/m^3 was accidentally dropped into water and sink. What force should be applied to the block to pull it out of water
An object at rest explodes into three pieces. Two of them are equal in mass and break off at an angle of 88.7° to each other, both by a speed of 33.4 m/s. The last piece has 4 times as much mass as each of the other pieces. What is the magnitude of t..
A ball bearing is dropped from rest at a point A. At the instant it passes a mark 4.7 m below A, another ball bearing is released from rest from a position 5.7 m below A. At what time after its release will the second ball bearing be overtaken by the..
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