Galileo was the first scientist to do which of the following? A. estimate the speed of light B. propose the heliocentric theory C. discover radioactivity D. define and measure speed E. invent the reflecting telescope

Wich cell contains a nucleus and membrane bound orgenalls

An electric generator transforms mechanical energy into electrical energy this process could be done by which of these

Which organisms provide the most available energy

Which equations could be used as is, or rearranged to calculate for frequency of a wave? Check all that apply. 1. wavelength = frequency / speed 2. speed = frequency x wavelength 3. wavelength = speed / frequency 4. frequency = speed / wavelength 5.

Which device is used to increase or decrease the voltage of an alternating current? O A. A commutator O B. A generator O c. A motor O D. A transformer

Objects falling through the air experience a type of friction called air resistance. true or false

How big is a wifi pulse signal coming from your router? A) 10 meters B) 15 meters C) 5-10 meters D) 20-30 meters

Imagine you are in a music concert. What different sounds might you hear? How are these sounds made?

Dose aloe Vera grow in the mesa?

A tradesman sharpens a knife by pushing it against the rim of a grindstone. The 35 cm diameter stone is spinning at 200 rpm and has a mass of 28 kg. The coefficient of kinetic friction between the knife and the stone is 0.20.