If an electrically neutral atom has 4 protons and 4 neutrons and it loses 2 electrons, what is its charge?

A) positive 2

B) negative 2

C) neutral

D) varies

A horizontal force of 400.0 N is required to pull a 1760 N truck across the floor at a constant speed. Find the coefficient of sliding friction.

The white dwarf that remains when our sun dies will be mostly made of

From 19 measurements of a pressure controller, the mean operating pressure is 4.97 kPa with a standard deviation of 0.0461 kPa. If more measurements are taken, estimate the expected range of pressure for 95% of the measurements.

Examining all of the major characteristics of Pluto and Eris (e. g., composition, location, orbit, atmosphere, etc.), what type of Solar System object does it most closely resemble?

When the sound of source is moving away from the observer the observer will hear a

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.