Pick the two correct statements.

A curtain blind uses a wedge.

B. A bicycle uses a wheel and axle.

C. A seesaw uses a lever.

D. An axe uses a pulley.

How do natural processes represent physical or chemical changes

Select the correct answer. Which statement is true about a polarized object? A. It gains electrons and becomes negatively charged. B. It gains protons and becomes positively charged. C. The number of positive and negative charges can be the same. D.

Are matter and weight the same thing?

Technician A says that a wastegate is used on most turbocharger systems to limit and control boost pressures. Technician B says that a relief valve is also used to keep the speed of the turbine wheel from speeding up during engine deceleration.

An ostrich can run 10 kilometers in 15 minutes. What is it's speed in kilometers per hour.

What is the simplest relationship between the angular wavenumber k and just one of the other kinematic variables? Express your answer using only one of the other kinematic variables plus constants like π.

The pilot of an airplane notes that the compass indicates heading west. The airplane's speed relative to the air is 100 km/h. The air is moving in a wind at 25.0 km/h toward the north.

How do you get a resultant factor? A. Add two or more vectors B. Add two scalars C. Multiply two scalars D. Multiply two vectors

A panpipe is made of five pipes. The longest pipe is 25 centimeters long and the shortest is 5 centimeters long. Which of these pipe produces the highest-frequency sound and why?

Model rocket A is launched at an angle of 70° above the x axis, with an initial velocity of 40 m/s. An identical rocket B is launched under the same conditions at an angle of 90° above the x axis, also with an initial velocity of 40 m/s.