If the field near the North Pole is about 1.0 * 10^{ - 4} T what will it be (approximately) 1.3 10^4 km above the surface at the North Pole?

In a ballistic pendulum an object of mass m is fired with an initial speed v_0 at a pendulum bob. The bob has a mass M, which is suspended by a rod of length L and negligible mass. After the collision, the pendulum and object stick together and swing to a maximum angular displacement theta as...

In the figure, a stationary block explodes into two pieces L and R that slide across a frictionless floor and then into regions with friction, where they stop. Piece L, with a mass of 1.6 kg, encounters a coefficient of kinetic friction L = 0.40 and slides to a stop in distance dL = 0.15 m....

a 122 watt motor is used to lift a 125 kg container to a height of 8 m. how much time does it take to lift the container with the motor

A 0.200-kg block along a horizontal track has a speed of 1.80 m/s immediately before colliding with a light spring of force constant 44.2 N/m located at the end of the track. (a) What is the spring's maximum compression if the track is frictionless?

A force of 255 N is used to push a 174 kg mass 54 m horizontally in 2.7 s. Calculate the work done on the mass.

oil costs $1.24 per gallon ans is rated at 130,00Btu per gallon.The boiler effiis assumed at 75 percent. The steam required is 20 pounds per hour per ton of refrigeration produced, and the heat required to evaporate water is 950 Btu per pound. Assume the electrical requirements to be 0.03kW per...

A rock of mass 43 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 252 N. What is the magnitude of the acceleration of the rock?

Two equal positive point charges are placed near each other. Which of the following most nearly represents the electric field produced by the two charges? A. B. C. Question 2 1 points Save Since mass is responsible for gravitational processes and charge responsible for electrostatic...

if an electron's position can be measured to a precision of 3.2 10 8 , how precisely can its speed be known? Express your answer using two significant figures.