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Assuming the Earth's magnetic field averages about 0.50×10?4 T near Earth's surface, estimate the total energy stored in this field in the first 7.0km above Earth's surface. The radius of Earth is 6380 km.
When the plunger is pushed, contents of the syringe are forced throughout a hollow needle (also of circular cross-If a 4.0 N force is applied to plunger and diameters of the plunger and the needle are 1.20 cm and 2.50 mm, correspondingly, what force ..
An athlete competing in the hammer throw swings a 4.0 kg hammer on a chain in a horizontal circle with a 5.4 m diameter. What is the tension in the chain attached to the hammer at that speed
A motorboat heads due east at 11.00 m/s across a river that flows toward the south at a speed of 3.40 m/s. What is the resultant velocity relative to an observer on the shore? If the river is 1360m wide, how long does take the boat to cross.
The height of a door is measured by four people and their measured values are 217.0 cm, 217.9 cm, 217.3 cm, and 217.6 cm, What is the standard deviation for the four measurements
What magnetic field strength produced by Helmholtz coils
A ping-pong ball of mass 2 gm and traveling with a velocity of 2 m/s collides with stationary tennis ball of mass 10 gm. Calculate the velocity of the ping-pong ball after the collision
A wrecking yard inventor wants to pick up cars by charging a 0.400 m diameter ball and inducing an equal and opposite charge on the car. If a car has a 1000 kg mass and the ball is to be able to lift it from a distance of 1.00 m: (a) What minimum ..
You hike 2/3 of the way to the top of the hill at a speed of 3.5 miles per H and run the final third at a speed of 5.6 miles per H
A 64 kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.15. What would be the magnitude of acceleration.
Determine magnitude of the force
A dead tree is initially stationary and there is a 30.0-degree angle between the tree and the vertical. The roots finally give way and the tree topples to the ground (rotating on an axis that is parallel to the level ground and intersecting the ba..
What are direction and magnitude of total velocity
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