A square frame with a side of 20 cm that can rotate in relation to the axis 00 'it is placed in a uniform field
magnetic with an induction of 0.5T directed vertically downwards.
a) draw the vectors of the forces acting on the sides of the frame
b) calculate the values of these forces and the resultant force acting on
frame
c) calculate the frame torque (resultant moment of forces
acting on the frame with respect to the axis of rotation)

Space vehicles traveling through earth's radiation belts can intercept a significant number of electrons. the resulting charge buildup can damage electronic components and disrupt operations. suppose a spherical metallic satellite 1.3 m in diameter accumulates 3.0 µc of charge in one orbital revolution. (a) find the resulting surface charge density. (b) calculate the magnitude of the electric field just outside the surface of the satellite, due to the surface charge.

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)