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A device with a resistance of 200.0k is connected to a 10V battery. How much power does the device use?
a) 0.050 mW
b) 0.50 mW
c) 2000 kW
d) 20,000 kW
A tennis player hits a ball 2.0 m above the ground. The ball leaves his racquet with a speed of 23.0 m/s at an angle 5.5 degrees above the horizontal. By how much does the ball clear the net
if your body has a density of 967 kg/m^3, What fration of you will be submerged when in salt water? the density of salt water is 1025 kg/m^3
Frames k and k' are inertial frames. Frame k' is moving at a velocity of magnitude v realtive to frame k in the direction of the x-axis. there are rigid rods in each frame oriented along the direction of the relative velocity. someone in frame k meas..
A 6000kg truck stands on the deck of an 80000kf ferryboat. Initially the ferry is at rest and the truck is located at its front end. how far will the ferry move forward relative to the water
You have a 1200W microwave. When you put a cup of water in for 8 minutes only half evaporates. How eficient is your microwave
A ball with a mass of 0.75 kg is thrown vertically into the air with an initial velocity of 10 m/s. establish the velocity of the ball when it hits the ground if it was initially released 2.0 m above the ground.
A uniform disk with mass m = 9.27 kg and radius R = 1.42 m lies in the x-y plane and centered at the origin. What is the magnitude of the torque on the disk about the z axis due to F1
You have a cylindrical cup of water that springs a leak 5 cm below the surface of the water. What is the velocity of the water coming out of the hole
How many radians does a point on Earth's surface move in 6 hours as a result of the Earth's rotation? What is the speed of a point on the equator
An electron and a positron each of mass 9.1 x 10^-31 kg, are in the same general vicinity and have very small initial speeds
To avoid a rear-end collision with a slow moving vehicle ahead, you step on the accelerator and increase your angular speed to 13.4 x 10-2 rads/s in a time of 8 s. What is the tangential acceleration of the car
how fast the air flow over the upper surface of the wing. What is the coefficient of kinetic friction between the box and the floor.
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