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A bat emits sound of wavelength 6.57 millimeter. It is flying toward a cave wall at 27 meter per second. Determine the frequency of the reflected sound that it hears? The speed of sound is 341.5 meter per second.
A 166 gram hockey puck has a initial velocity of vx = 27 m/sec and vy = 16 m/sec. What is the impulse delivered to the hockey puck in the x direction
The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At 22.0 °C the air gap between the rods is 1.99 x 10-3 m
A 60 centimeter long, 500 gram bar rotates in a horizontal plane on an axle that passes through the center of the bar. Find how much force does each jet of escaping air exert on the bar
A 1000-kg cart is rolling to the right at 5m/s. A 75-kg man is standing on the right end of the cart. What is the speed of the cart if the man suddenly starts running to the left with a speed of 10.00m/s relative to the cart.
A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. What is the average angular speed of the Grindstone
The current supplied by a battery in a portable device is typically 0.131 A. Find the number of electrons passing through the device
You throw a rock vertically upward with an initial speed of 19.9 m/s. How much time does it take for the rock to hit the ground
What will be its length and height at rest
In Europe, surveyors often measure angles in grads. There are 100 grads in one-quarter of a circle. How many grads are there in 2.16 radians
A girl is using a rope to pull a box that has mass of 30kg across a level surface with constant velocity. What is the normal force of the floor on the box
An electric field is directed out of the page within a circular region of radius R= 3.00cm. The magnitude of the electric field is given with E= (0.500 V/m*s)(1-r/R)t, where t is in seconds and r is the radial distance (r is less than or equal to R).
A man on the moon with a mass of 90 Kg weighs 146 newtons. The radius of the moon is 1.74 X 10^6 meters. Find the mass of the moon.
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