How can hypotheses best be tested?

by asking questions

through experimentation

by forming an opinion

through technology

The law of conservation of energy can be applied

A student said, "The displacement between my dorm and the lecture hall is 1 kilometer." Is he using the correct physical quantity for the information provided? What should he have called the 1 kilometer?

In the open-economy macroeconomic model, if the supply of loanable funds increases, net capital outflow A. and the real exchange rate decrease. B. increases and the real exchange rate decreases. C. and the real exchange rate increase. D.

What is temperature? A: The same thing has heat energy B: The amount of calories in a substance C: An indirect measure of heat energy

Which element in the earth's atmosphere is essential for human life, is extremely rare or nonexistent in the atmospheres of other planets in our solar system, and is primarily responsible for the development of life outside the oceans?

A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did gravity do on the bucket during this process?

You then decide to throw another disc to your friend in the tree for fun. If you throw the disc at a speed of 10 m/s and your friend catches it 5.0 m above you, what was the speed of the disc just before your friend catches it

Which is true? An ideal emf device has internal resistance and a real emf device does not. A real emf device sets up a potential difference and an ideal emf device does not.

An object is released from rest on a planetthat has no atmosphere. The object fallsfreely for 2.03 m in the first second. What is the magnitude of the accelerationdue to gravity on the planet?

Properties of elements within a ... on the periodic table change in a predictable way from one side of the table to the other