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During a thunderstorm the electric field at a certain point in the earth's atmosphere is 1.06 x 105 N/C, directed upward. Obtain the acceleration of a small piece of ice of mass 1.01 x 10-4 gram, carrying a charge of 1.06 x 10-11 C.
Determine how many times greater heat loss occurs through a glass window thats 80.0 cm high, 70 cm wide, and 0.300 cm thick (k = 0.791 W/m°C) than a electrical supply line running outside to an exterior mounted light.
An ac generator emf is = m sin d t, with m = 26.4 V and d = 301 rad/s. It is connected to a 15.4 H inductor. What is the maximum value of the current
A 7.0 g bullet is fired into a 1.5 kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a max height of 12 cm. Find the initial speed of the bullet.
You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball, How tall is the building that the child is standing on
Eight lights are connected in parallel to a 110 V source by two leads of total resistance 2.20. If 240 mA flows through each bulb, what is the resistance of each.
An EM wave has a wave vector k=(x+2y)rad/m. The magnetic field amplitude is Bo=(1.43x10^-10T)(2x-y+z). Determine the electric field vector amplitude
a 4 kg box is pushed up a frictionless 30 degree incline with a force of 40n. this 40 n force is parallel to the
If a boat and its riders have a mass of 1500kg and the boat drifts in at 1.4m/s how much work does Sam do to stop it
A 0.400-kg ball approaches a very massive wall at 20.0 m/s perpediculat to wall and rebounds with 70.0% of its inital kinetic energy. find the magnitude of the change in momentum of the wall
The magnetic field component of the electromagnetic wave is 15.0 microT. What is the magnetic energy density of the wave
a 500g cart moving to the right with a speed of 30cms collides with a stationary 1500g cart. immediately after the
the radius of a park merry-go-round is 2.2m. to start itrotation you warp a rope around it and pull with a force of 260 Nfor 12 s. what is the moment of inertia of the merry-go-round
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