A stone is tied to the end of the string and is rotated in horizontal circle at 400 revolutions
per minute. If the magnitude of its
acceleration is 1.5 x 10^3 m/s2, what is the
radius of the circle?

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples