What does a fern ultimately depend on as an energy source?

A spring has a natural length of 28 cm. If a 27-N force is required to keep it stretched to a length of 32 cm, how much work W is required to stretch it from 28 cm to 30 cm? (Round your answer to two decimal places.) W = 13.

Which processes transfer water from the ocean to the atmosphere? A. collection and evaporation B. collection and condensation C. precipitation and collection D. evaporation and condensation

2. A common physics experiment involves lowering an open tube into a cylinder of water and moving the tube up and down to adjust the length of the air column in the tube.

A bike travels 15.0 km in 45.0 min. Its average speed in km/h is.

Suppose two chemicals are reacted together. It takes 750 kJ of energy to break the bonds of the reactants and 1050 kJ of energy are released by the formation of the products. Which statement is true about the reaction? The reaction is exothermic.

Two identical spheres of equal mass a distance of 10 m apart a surface gravity of 0.0050 to each other where are the masses

Can a elephant have the same momentum as a golf ball explain

Which of the following is true about scientific inquiries? A. Scientific inquiries are never based on previous scientific research and data. B. Scientific inquiries are usually guided by previous scientific principles and knowledge. C.

A student measured the mass of a rock to be 19.8 grams; the actual mass was 18.6 grams. What was the student's percent deviation?

Two students are arguing over the differences between speed and velocity. One student says, "Speed is a scalar because it describes how fast an object is traveling.