4) What was Alhazen’s greatest contribution to science? 5) What is the name of the only particle that can travel at the speed of light?

7) What did William Herschel’s experiment with light and heat prove?
8) Why are organ pipes in the Abbey different lengths?
9) What is the difference between light and sound waves as they travel?
10) Which color has the lowest amount of energy, and why?
11) Why are there dark bands in the spectra Joseph Fraunhofer saw?
12) What did Joseph Fraunhofer discover about the elements that make up the universe? only his tent, a piece of wood, and a ruler?

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

What is work? how much work is done to move an object 0 meters?

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f