Which of the following is NOT a step in the evolution of a star? a. supergiant c. supernova b. red dwarf d. neutron star

Which device transforms electrical energy to mechanical energy A. generator B. motor C. transformer D. magnet

During a total lunar eclipse, where is the Moon located? a. in the umbra b. in the penumbra c. between the Sun and Earth d. between the umbra and penumbra

What is the frequency of a wave that has a speed of 0.6 m/s and a wavelength of 0.020 meter?

The spreading of sound waves around openings in barriers is called

A 1.5 kg orange falls from a tree and hits the ground in 0.75s. What is the speed of the orange just before it hits the ground?

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.

What is the unit for force we use when calculating F=ma?

A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum. might be:. A. zero. B. 3. C. 12. D. 47. E. 50

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

In late adulthood, changes in memory may bot be inevitable however, any decline in memory tends to invite