The average height of an apple tree is 4.00 m how long will it take an apple falling from that high to reach the ground given g equals -9.8 m/s squared

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.

The velocity of sound wave in air at 35°c is 353m/s, calculate the velocity of sound at 46°c