A Martian rover is descending a hill sloped at 30° with the horizontal. It travels with a constant velocity of 2 meters/second. Calculate its horizontal velocity.

When logging is carried out in a watershed, a likely effect on the local stream is A. increased water temperature B. increased oligotrophic conditions C. decreased input of sediments decreased nutrient levels D. mitigation on anoxia

In the scientific method, a hypothesis is a

Potential energy can transform into kinetic energy and vice versa so the total energy stay the same (reflect on the skateboard simulation) A) True B) False

How might a collision between Neptune and Halley's Comet affect Neptune's orbit?

14. High-voltage power lines are a familiar sight throughout the country. The aluminum wire used for some of these lines has a cross-sectional area of 4.9 x 10-4 m2. What is the resistance of ten kilometers of this wire

If we compare the force of gravity to strong nuclear force, we could conclude that A. gravity is the weaker force; it is related to mass. B. gravity is the stronger force; it is related to distance. C.

The ability of an apple to change color when exposed to air is chemical or physical

A man exerts 1000 Newtons of force to move a very large couch 2 meters. If it takes him 5 seconds to move the couch, how much power does it require?

Conditions for equilibriam

A 1200-kg car is pulling a 500-kg trailer along level ground. Friction of the road on the trailer is negligible. The car accelerates with an acceleration of 1.3 m/s2. What is the force exerted by the car on the traile