Questions in physics

Questions in physics

[Homework Help] If the speed of an object is tripled, its kinetic energy will be:

[Homework Help] In what ways is climate controlled by the sun and the water cycle?

[Homework Help] A passenger on a boat moving at 1.70 m/s on a still lake walks up a flight of stairs at a speed of 0.60 m/s, as shown in the figure. The stairs are angled at 45° pointing in the direction of motion as shown. Write the vector velocity of the passenger relative to the water. Express your answer using two significant figures. Express your answer in terms of the unit vectors [tex] \mathbf{i} [/tex] and [tex] \mathbf{j} [/tex].

[Homework Help] Does the depth of a pan affect how water freezes?

[Homework Help] Is it possible for a distance-versus-time graph to be a vertical line?

[Homework Help] Explain how geographic features can cause local winds.

[Homework Help] Q: What happens when cold air approaches a body of warm air? Optional Answers: A. The warm air rises. B. The warm and cold air both disappear. C. The warm and cold air mix immediately. D. The cold air rises.

[Homework Help] Q: Through which of the following ways can heat be transferred? A. By direct or indirect contact between objects at different temperatures. B. Only by direct contact between objects at different temperatures. C. Only by indirect contact between objects at different temperatures. D. Heat can never be transferred between objects.

[Homework Help] Why are frying pans usually made out of metal? A. Because metal is a good conductor of heat. B. Because metal is a poor conductor of electricity. C. Because metal is a good conductor of electricity. D. Because metal is a poor conductor of heat.

[Homework Help] Sometimes rock has both large and small mineral crystals. How can you explain this?