Whose innovations include the electric lightbulb and the phonograph?

Alexander Graham Bell

Henry Ford

the Wright brothers

Thomas Edison

It takes 5 s for sonar pulse to travel 6 km. what is the speed of the sonar pulse?

The rhinestones in costume jewelry are glass with index of refraction 1.50. to make them more reflective, they are often coated with a layer of silicon monoxide of index of refraction 2.00.

Pretend for a day your non-dominant hand is broken and you can't use of it. Pay attention to the activities you do every day. You can even simulate a break by wrapping an ace bandage (not to tight) on your hand.

Charge Q = + 4.00 mC is distributed uniformly over the volume of an insulating sphere that has radius R = 5.00 cm. What is the potential difference between the center of the sphere and the surface of the sphere?

Explain why Mercury, Venus, and Mars are not likely to support life as we know it.

The elements in group 17 of the periodic table are called halogens. all halogens have the same?

Baby Susie's pediatrician notices that one of her eyes rotates outward and that she does not appear to be using it for vision. What is her condition and what does the pediatrician recommend?

All the interconnected paths of energy flowing from species to species in an ecosystem is called a a. trophic level. b. food chain. c. detrital food web. d. food web.

A firefighting crew uses a water cannon that shoots water at 25.0m/s at a fixed angle of 53.0 degrees above the horizontal. The firefighters want to direct the water at a blaze that is 10.0 m above ground level.

Sulfur oxides (SO2) are responsible for A) global warming. B) greenhouse gases. C) producing acid rain. D) destroying the ozone layer.