If speed is 20ms and distance travelled is 72 km find time taken

What is the wavelength of an earthquake wave if it has a speed of 7km/s and a frequency of 8hz

When a collapsed core becomes so dense that only neutrons can exist there?

A ball is dropped from somewhere above a window that is 2.00 m in height. As it falls, it is visible to a person boxing through the window for 200 ms as it passes by the 2.00 m height of the window.

A 958-N rocket is coming in for a vertical landing. It starts with a downward speed of 25 m/s and must reduce its speed to 0m/s in 8.0 seconds for the final landing. During this landing maneuver, what must be the thrust due to the rockets engines?

Science labs have safety equipment that is designed to be used during an emergency. What emergency safety equipment should be in a science lab? How would you use this equipment in an emergency?

A skier is traveling down a slope that is inclined 30° above the horizontal. The coefficient of kinetic friction between the skier and the slope is 0.10. Which of the following best describes the acceleration of the skier? A) It is zero.

What was the idea of the Continent Drift

What happens to an object when an unbalanced force acts on it?

What is the basis for rutherford's planetary model?

Choose the option that best answers the question. The hypotenuse of a right triangle is 16 ft longer than the length of the shorter leg. If the area of this triangle is exactly 120 ft2, what is the length of the hypotenuse in feet?