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

True or false, if acceleration is negative speed is decreasing

Explain why a piece of paper falls slowly to the ground despite the force of gravity on it.

Predict whether an element with a valence of 8 is most likely to form ionic bonds covalent bonds or no chemical bonds with other Atoms. explain

A sound wave in the air has a frequency of 680 cycles per second. What is the approximate wavelength of the sound wave

Determine the mass of the object below to the correct degree of precision. 15.37 g 15.370 g 153.7 g 153.73 g

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.

Which of the following best describes scientific knowledge A.) Durable B.) Absolute and never changing C.) Frequently varies

Beth made the chart shown. A 2-column table with 1 row. The first column labeled X has entries Wall clock, T V remote control, Portable music player. The second column labeled Y has entries Refrigerator, Table lamp, Hair dryer.

Which sentence states Newton's third law? If two objects collide, each object exerts a force in the same direction as the other. If two objects collide, each object exerts a force equal to and in the opposite direction of the other.

Why did the chicken cross the road.