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Questions in physics

[Answered] What is the average speed of a cheetah that runs 70 meters in 2.5 seconds?

[Answered] Oliver weighs 600 N. He climbs a flight of stairs that is 3.0 meters tall in 4.0 seconds. a. How much work did he do? b. What was Oliver’s power in watts?

[Answered] A butterfly has a wingspan of 66 mm and a height of 6 cm. Which is greater, its wingspan or its height?

[Answered] The speed of light is about \(3.00 \times 10^5\) km/s. It takes approximately 1.28 seconds for light reflected from the moon to reach Earth. What is the average distance from Earth to the moon?

[Answered] Dogs can hear much higher frequencies than humans. Therefore, dog whistles, which are inaudible to the human ear, can be heard by dogs. If a dog whistle has a frequency of 30,000 Hz, what is the wavelength of the sound emitted?

[Answered] The model of the universe that suggests the sun is the center of the universe was first proposed by: A. Brahe B. Kepler C. Ptolemy D. Copernicus Can someone also add a few facts about this suggestion and its author?

[Answered] Suppose that you hear a clap of thunder 16.2 seconds after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s, and the speed of light in air is [tex]3.00 \times 10^8 \, \text{m/s}[/tex]. How far are you from the lightning stroke?

[Answered] How do charges move through an insulated wire connected across a battery? Use the terms potential difference, current, conductor, and insulator in your answer.

[Answered] How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m? The acceleration due to gravity is [tex]9.8 \, \text{m/s}^2[/tex].

[Answered] What is the acceleration of a 0.30-kilogram ball that is hit with a force of 25 N?