You plan a car trip for which you want to average 90 km/h. You cover the first half of the distance at an average speed of only 48 km/h. What must your average speed be in the second half of the trip to meet your goal?

Why do comets have tails?

A 1 cm^3 block with a density of 0.92 g/cm^3 is floating in a container of water (d = 1g / cm^3). You may ignore any air pressure throughout this problem. What buoyant force is necessary to keep the block from sinking?

N 1958 a large earthquake in Alaska produced a tsunami. What was the approximate height of the tsunami?

What is the spring constant (in n/m) of a spring that stores 100 J of elastic potential energy when it is stretched 5 m?

A parallel-plate capacitor has an area of 4.90 cm2 and the plates are separated by 0.500 mm. The capacitor stores a charge of 391.0 pC. What is the potential difference across the plates of the capacitor? The permittivity of a vacuum is 8.

Select the statement that best describes how the forces relate. A. The object on which they are acting and the distance to that object determines the amount of force. B.

A block with m = 300 grams oscillates at the end of a linear spring with k = 6.5 N/m. (assume this is a top-down view and the block is sliding on a frinctionless surface;

What changes would a cold front bring to an area with warm, dry weather? extended period of rain or snow several days of gray skies dry air and sunny skies rain or thunderstorms

Candace is a confident, disciplined, motivated, hardworking team player. She pushes her teammates to perform to their full potential but guides them and does not control them. What does Candace's commitment to her team show?

Windows that look into bathrooms are often translucent instead of transparent. Why?