Is the speed of light faster in helium or air?

Which form of radiation is used to kill microorganisms?

Where does sheering often occur

What holds the stars together in their galaxies? A. light B. orbits of the planets C. weight D. gravity

A boat takes 3.0 hr to travel 27 km down a river, then 6.0 hr to return. How fast is the river flowing?

What determines the wavelength of the standing wave?

A large truck loaded with scrap Stella weights 14 metric tons and is traveling north on the interstate heading for Chicago. It has been averaging 48km/h for the journey and has traveled over the 1450 km so far. It has just stopped to refuel.

Which interaction of nature binds neutrons and protons into nuclei? A. strong B. weak C. electromagnetic D. gravitational

Why does icing sugar dissolve more rapidly than granular sugar?

At t = 0 the components of a radio-controlled car's velocity are vx = 0.5 m/s and vy = 1.2 m/s. Find the components of the car's velocity at t = 4.

2) A window washer pulls themselves upward using a bucket pulley apparatus. A) How hard must pull downward to raise herself slowly at a constant speed? B) If she increases this force by 15%, what will her acceleration be?