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A bird flies 2.8{\rm km} due west and then 2.7{\rm km} due north. Another bird flies 2.7{\rm km} due west and 2.8{\rm km} due north. what is the angle between the net displacement vectors for the two birds?
Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. what is his speed after the collision
As a tennis ball is struck, it departs from the racket horizontally with a speed of 27.3 m/s. The ball hits the court at a horizontal distance of 19.3 m from the racket. How far above the court is the tennis ball when it leaves the racket?
Whole blood has a surface tension of 0.068 N/M & a density of 1050kgm-3.what weight can whole blood rise in a capillary blood vessel that has radius 2.0 x 10-6 if the contact is zero.
Male Rana catesbeiana bullfrogs are known for their loud mating call. The call is emitted not by the frog's mouth but by its eardrums, which lie on the surface of the head. And, surprisingly, the sound has nothing to do with the frog's inflated th..
If a low-pressure sodium vapor lamp emits 50 W of yellow light, how many photons does it emit each second
A freight train has a mass of 1.5 × 107 kg. If the locomotive can exert a constant pull of 7.9 × 105 N, how long does it take to increase the speed of the train from rest to 88 km/h
A bowling ball, which can be treated as a solid sphere with a diameter of 21.6 cm and a weight of 33 kg, The kinetic energy of the bowling ball is
Two blocks are free to slide along the frictionless wooden track shown below. The block of mass m1 = 4.94 kg is released from the position shown, Calculate the maximum height to which m1 rises
A rotating cylinder about 16 {rm km} long and 7.40 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it would experience the same acceleration due to gravity as on Earth.
Hail comes straight down at a mass rate of m/?t = 0.070 kg/s and an initial velocity of v0 = -14 m/s and strikes the roof perpendicularly. calculate the force exerted by the hail on the roof
Two electrons are fixed 2.00 centimeters apart. Another electron is shot from infinity and comes to rest midway between the two fixed electrons. Find the initial speed of the electron
To make an order-of-magnitude estimate of the energy level spacings in the nucleus, Calculate the energy of the ground state
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