How are scientific methods used to answer a question?

Which of the following is true statement about isotopes? A. The number of protons always equals the number of neutrons in all isotopes. B. The number of protons never equals the number of neutrons in an isotope. C.

The power in an electrical circuit is given by the equation P=i^2R, where I is the current flowing through the circuit and R is the resistance of the circuit.

A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a force A) of zero b) of less than 600 N is the truck is slowing down c) equal to 600 N only if the truck is moving at constant velocity d)

A miner finds a small mineral fragment with a volume of 5.74 cm^3 and a mass of 28.7 g. What is the density of that mineral fragment?

How do natural gas and crude oil compare as energy resources?

F an electron fell to a lower orbit or energy level, energy would be A. created. B. emitted. C. absorbed. D. transferred.

Which is the correct order from the closest to the sun to the farthest away from the sun? A. terrestrial planets, asteroid belt, gas planets, Kuiper belt B. gas planets, asteroid belt, terrestrial planets, Kuiper belt C.

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom