In which of the following is the speed of sound maximum?

Helium

Air

Aluminium

Water

A scientist investigating the amount of force needed to perform a bicep curl with a 10 lb weight is studying which level of organization?

The form of energy that holds atomic nuclei together is called

A certain spacecraft is x AU (Astronomical Units) from Earth. How long in seconds does it take for a signal to reach the Earth after it is transmitted from the spacecraft? Hint: An AU is about 149.9 Million Km, and light moves at 299,800 Km/s.

The shock from an electric fence would be the least unpleasant if you were standing A. on dry, thick gravel B. in tall grass C. In wet grass OD. near the livestock

Which of these forces could slow a moving baseball down A. applied force only B. gravitational forces only C. applied, frictional, gravitational forces

Which universal force acts on protons and neutrons in an atom's nucleus?

How many turns are in the secondary coil of a step up transformer that increases voltage from 30 V to 150 V and has seven turns in the primary coil?

What is a nuclear bulge? a) The bulging corner of a spiral galaxy consisting of gas in the shape of a spiral sphere that circles a galaxy b) The bulging center of a spiral galaxy consisting of debris in the shape of a flattened sphere that circles a

Your friend of mass 50 kg can just barely float in fresh water. Calculate her approximate volume.

A flashlight beam strikes the surface of a pane of glass (n = 1.50) at a 61° angle to the normal. what is the angle of refraction?