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You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind, What is the speed of the police car
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 650 m/s. find the horizontal distance between the end of the rifle
Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. What are the diameters of the disks
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What is the time needed to take off
A stone is dropped into a river from a bridge 41.9 m above the water. What is the initial speed of the second stone
a 28 kg rifle bullet at an unknown velocity buries itself in a 3.6-kg pendulum hanging on a 2.8-m long string, what was the speed of the bullet prior to impact
Two sinusoidal waves, identical except for phase, travel in the same direction along a string, what is the resultant amplitude of the two waves
A parallel plate capacitor has a capacitance of 4.5 µF when filled with a dielectric. What is the dielectric constant of the dielectric
A stone is dropped from rest from the roof of a 100-m high building; 2.00 s after that, a second stone is thrown straight down with initial speed v0, and the second stone passes the first stone 21.6
An injured monkey sits perched on a tree branch 3.0 m above the ground, what is minimum speed the tranquilizer dart must leave the gun to still hit the monkey
A +5.8 µC charge is placed at the origin and a -3.9 µC charge is placed at x = 25 cm. At what coordinates can a third charge be placed
the two flat air ballons in the drawing are 3.2 meters and 61.0 meters above the ground. what is the horizontal distance x between the two balloons
an auditorium measures 40.0m X20.0 m X 12.0 m. The density of air is 1.20 kg/m^3. find the weight of air in the room
A slab of a thermal insulator with a cross-sectional area of 110{\rm cm^2} is 2.90{\rm cm} thick. how much heat flows through the slab
A car traveling at a constant speed of 27.0 m/s passes a trooper hidden behind a billboard. From the intersection of the two curves, read the time at which the trooper overtakes the car
When a single person shouts at a football game, the sound intensity level at the center of the field is 59.9dB. how many people are at the game
a projectile is fired with an initial velocity of 35 m/s at an angle of 30 degrees above horizontal of a 30 feet tall building. find the velocity of the projectile at the ground
The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v = (-5.30 107) t 2 + (3.15 105) t, What is the length of the barrel
A star lying 35pc from the Sun has proper motion of 0.2"/yr. calculate the magnitude of its three-dimensional velocity relative to the Sun
A projectile is fired at v0 = 407.0 m/s at an angle of ? = 72.0o with respect to the horizontal. How far will the projectile travel in the horizontal direction
A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. What must be the horizontal distance between the saddle and limb when the ranch hand makes h
Two protons are moving directly toward one another. When they are very far apart, What is the distance of closest approach?
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. Calculate the charge density of the air
a 600 ton Boeing business jet is flying at 500 mph at a constant altitude of 35,00 ft. what is the lifting force acting on the jet provided by the air