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One billiard ball is shot east at 2.50 m/s . A second, identical billiard ball is shot west at 1.39 m/s . The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90 degree and sending it north at 1.86 m/s.
a. What is the speed of the first ball after the collision?
b. What is the direction of the first ball after the collision? Give the direction as an angle south of east.
How long is the bridge? Write down an equation for the bridge's height. And how far from the center of the bridge are two points if bridge's height at those points is 80 meters.
Ann is driving down a street at 53km/h. suddenly a child runs into the street. If it takes Ann 0.709s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m.
You look directly overhead and see a plane exactly 1.2·km above the ground, flying faster than the speed of sound. Find the angle of the shock wave cone
The observer on the right, sees two final images. One image comes directly from the objet. What is the focal length of the concave mirror
The specific heat of mercury is 138 J/kg Co Determine the latent heat of fusion of mercury using the following calorimeter data: 1 kg of solid Hg at its melting point of -39.0º C is placed in a 0.620 kg aluminium calorimeter with 0.40 kg of water ..
Express the velocity of the puck in the unit vector(i,j) notation and in the magnitude and angle notation. Vx = 0.026m/s Vy = 0.053m/s And then find the momentum of the puck
Sam, whose mass is 80kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 250N and a coefficient of kinetic friction on snow of 0.1, What is Sam's top speed
A massless pan hangs from a spring that is suspended from the ceiling. What is the pan's distance from the ceiling when the spring reaches its maximum length
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 9.6 m and, in starting, rotates according to ? = 0.34t^2, find the magnitudes of the astronaut's angular velocity
A diver beneath the surface of water in a lake looks up at 27 degrees from the vertical to see a life ring floating on the surface. How far is the base of the smokestack from the life ring
Polymer diffusion and Calibration of an optical tweezer
At a rock concert, a dB meter registered126dB when placed 2.8m in front of a loudspeaker on the stage. What was the power output of the speaker
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