Achild on a bike stops pedaling and coasts. because he is not pedaling he slows down at a rate of 1 m/s^2. in the 5 seconds after he stops pedaling he travels a distance of 62.5 meters. how fast was the child going initially? *

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?