Which is a tool used by scientists to determine the composition of objects?

What is work done by a person in moving a block of mass 2kg on a frictionless floor up to a distance of 5m?

The digestive system provides nutrients to all the body systems by breaking down food. Identify 2 parts of the human body that are included in the digestive system. Explain the function of these 2 parts of the digestive system

Which word is described by this riddle poem. (hint: jails and phones) My first is in cars but isn't in bars My second's in dance, but not in pants My third is in lame, my fourth is the same. What word could i possibly be?

Why are we unlikely to find earth-like planets around halo stars in the galaxy? why are we unlikely to find earth-like planets around halo stars in th?

Which two forms of matter will always form a homogeneous mixture?

A chemical bond formed when Adams share three pairs of electrons is A. an ionic bond B. a single bond C. a double bond D. a Triple bond

A 1100 kg car rounds a circular turn of radius 24.6 m. Of the road is flat and the coefficient of static friction between the tires and the road is 0.59, how fast can the car go without skidding

What is the momentum of a 15 kg tire rolling down a hill at 3 m/s? 5 kg • m/s 18 kg • m/s 45 kg • m/s 60 kg • m/s

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.