Physics question--what happens at the beginning of every roller coaster ride? (No obvious/joke answers)

What is the wavelength of an earthquake wave if it has a speed of 10 km/s and a frequency of 3 Hz? What is the answer and units?

A constant force is exerted for a short time interval on a cart that is initially at rest on an air track. This force gives the cart a certain final speed.

How do you calculate heat resistance

What two things affect the density of Water?

Which one of the following is a decomposition reaction? A. 2SO3 (g) → 2SO2 (g) + O2 (g) B. CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g) C. 2LiOH (s) + CO2 (g) → Li2CO3 (s) + H2O (l) D. H2 (g) + Cl2 (g) → 2HCl (g)

If you double the velocity of an object, you increase its kinetic energy by a factor of what?

2. Modern aircraft carriers use a steam powered catapult system to launch jets from a very short range. These catapults can provide a constant acceleration to bring jets up to speed in only two seconds.

Which of these best describes a situation where science is used? A. choosing a career after graduation B. brushing teeth after having dinner C. ordering food in a restaurant by looking at a menu card D.

A receiver is in a jet flying alongside another jet that is emitting 2.0 x 106 Hz radio waves. If the jets fly at 268 m/s, what is the change in frequency detected at the receiver?

Dark matter has been detected by its