A4.0 x 10^10 kg asteroid is heading directly toward the center of the earth at a steady 20 km/s. to save the planet, astronauts strap a giant rocket to the asteroid perpendicular to its direction of travel. the rocket generates 5.0 x 10^9 n of thrust. the rocket is fired when the asteroid is 4.0 x 10^6 km away from earth. you can ignore the earth’s gravitational force on the asteroid and their rotation about the sun. if the mission fails, how many hours is it until the asteroid impacts the earth?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.