A stationary telescope monitoring a rocket ship observes the ship emitting flashes of light at 1-second intervals. If the ship begins moving toward the telescope at speed 0.6c, with what period does the telescope observe the light flashes?

a.) 0.5 sec

b.) 2 sec

c.) 0.8 sec

d.) 1 sec

e.) 1.2 sec

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative

Which of the following statement is false ? a.batteries should never be stored on metal trays or outside in the elements)b, battery acid cannot be neutralized)c.do not stack batteries on top of each other)d.never put a damaged battery in a dumpster. i