Thousands of years ago, giraffes with short necks were common within giraffe populations. Nearly all giraffe populations today have long necks. This difference could be due to

In the phenomenon known as the Doppler Effect, electrons are ejected when light shines on certain substances. true or false

Two identical cows fell into a muddy hole. One fell on its side and the other on its feet. Which one sunk furthest into the mud and explain your answer

Does potential energy increase with temperature?

A circuit is built based on this circuit diagram. What is the equivalent resistance of the circuit?

Gauss's law is usualy written as: ∫Φ_E = E * dA = qencl / ε0 what does qencl refers in Guass's law? O the net charge inside the closed surface O the charge residing on insulators inside the closed surface O all the charge in the physical system O

A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120 m starts from rest and accelerates at 30.

Which describes a property shared by ultraviolet light and X-rays? A They are both transverse waves. B They share the same wavelength. C They contain less energy than visible light. D They both require a medium to travel through.

What is the potential energy called that is associated with objects that can be stretched

Which of the following is not a current use of radioisotopes? medical diagnosis sterilization of equipment detection of leaks in building structures light fixtures

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates