Two tuning forks, 254 Hz. and 260 Hz., are struck simultaneously. How many beats will be heard?

8

4

6

If the temperature at the surface of earth (at sea level) is 40°c, what is the temperature at 2000 m if the normal lapse rate is 6.4°c/1000 m?

Which of the following changes when an unbalanced force acts on an object?

What components of an ecosystem do organism respond to

All steroids are illegal. A. True B. False

What does P represent in the equation P=m*v?

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form

The courtroom role that possesses the most discretion is?