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When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. This pressure causes the force that pushes the bullet through the barrel. The barrel has a length of 0.60 m and an opening whose radius is 2.8 10-3 m. A bullet (mass = 2.7 10-3 kg) has a speed of 380 m/s after passing through this barrel. Ignore friction and determine the average pressure of the expanding gas.
A bomb is dropped from an airplane in level flight at a speed of 970 km/h. The altitude of the aircraft is 2000 m. At what horizontal distance from the initial position of the aircraft will the bomb land.
Driving in your car with a constant speed of 12 {rm m}/{rm s}, you encounter a bump in the road that has a circular cross-section. If the radius of curvature of the bump is 35 {rm m}, find out the apparent weight of a 69 person in your car as you ..
find magnitude of the tension in the wire and magnitudes.
A 30.0 capacitor initially charged to 30 is discharged by a 1.40 resistor. How long does it take to reduce the capacitor's charge to 2.00.
What is the kinetic energy of a carbon atom moving with a speed of 500 m/s.
Two sinusoidal waves of the same period, with amplitudes of 5.0 and 6.5 mm, travel in the same direction along a stretched string; they produce a resultant wave with an amplitude of 10.036 mm. The phase constant of the 5.0 mm wave is 0. What is th..
While rearranging a dorm room, a student does 292J of work in moving a desk 3.90m. What was the magnitude of applied horizontal force.
How many liters of gasoline would give the same mechanical energy given that each liter provides 8.50x10^6 J of mechanical energy.
At a factory, a noon whistle is sounding with a frequency of 491 Hz. As a car travelling at 78 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the chang..
Assume too that the bullets rebound straight back with no change in speed. What is the magnitude of the average force on Superman's chest from stream of bullets.
An electric dipole includes a charge of 4 ?C and a second charge. What is the total charge of the dipole?
The 3.10 kg, 34.0-cm-diameter disk is spinning at 350 rpm How much friction force should the brake apply to the rim to bring the disk to a halt in 2.20 s.
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