Which two actions would weaken an electromagnet? A. Replacing a 6 V battery with a 9V battery
B. Replacing the hollow core of the magnet with a steel core
C. Increasing the number of wraps of wire
D. Replacing the steel core of the magnet with a plastic core
E. Decreasing the number of wraps of wire

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Which statement correctly describes the relationship between frequency and wavelength?