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A 3,000-kg truck runs into the rear of a 1,000-kg car that wasstationary. The truck and car are locked together after thecollision and move with speed 9 m/s. What was the speed of the truck before the collision?
a chain that can support 2000 n is suspended between two trees. a 200 kg motor hangs from the middle. the slack in the
In the annual battle of the dorms, students gather on the roofs of Jackson, A second balloon launched at the same angle hits the edge of Walton's roof. Find the initial speed of this second balloon
A thin cylindrical shell of infinite length and radius 2.60-cm hasa uniform surface charge density of 6.89-nC/m2. What is the magnitude of the electric field at a distance of 5.79-cm from the cylindrical shell?
A horizontal force of 30 Newton pulls a block of mass 3.7 kilogram across a level floor. obtain what is the final speed of the block
Human tissue contains about 3·1027 electrons perkg of material. Suppose two humans are located 1960 km apart andeach has a mass of 60 kg. What will be the magnitude of the resulting force in N
q1. mercedes an astrononaut on the moon holds a 2.5 kg bowling ball over her head 3.2 m above the surface of the moon
Suppose that when a certain sound intensity level (in dB) triples, the sound intensity (in W/m2) quadruples. Determine this sound intensity level
at a time 3.30 a point on the rim of a wheel with a radius of 0.180 has a tangential speed of 55.0 as the wheel slows
An electric field given by = 7.4· - 4.4(y2 4.7)· pierces a Gaussian cube of edge length 4.0 m, What net charge (in Coulombs) is enclosed by the Gaussian cube
When light of wavelength 380 nm falls on a cesium surface,electrons are emitted that have a maximum kinetic energy of 1.13eV. Find the work function of cesium
A 10-kg disk-shaped flywheel of radius 9.0 cmrotates with a rotational speed of 320 rad/s. Determine the rotational momentum of the flywheel.
A friend in a spaceship travels past you at a high speed. Hetells you that his ship is 21 m longand that the identical ship you are sitting in is 15 m long. According to your observations, how long is your ship
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