Which characteristic should a good scientific question have?

A ball is dropped from a high rise platform at t=0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed v. The two balls meet at t=18 s. What is the value of v?

100Gw x 35ms (note: a watt is a joule per second)

Which of the following statements is true? Energy input is always greater than energy output. Magnetic fields are weakest at the poles of a magnet. Magnetic fields can push and pull protons. A change in acceleration is called velocity.

If a taxi moves with an initial velocity of + 12.6 meters/second and has a constant acceleration of + 3.1 meters/second2, what is its final velocity after 6.0 seconds?

Two technicians are discussing a fuel gauge on a General Motors vehicle. Technician A says that if the ground wire's connection to the fuel tank sending unit becomes rusty or corroded, the fuel gauge will read lower than normal.

How does the brightness of a bulb tell you about the energy of electrons passing through it?

Why do you think sound travels faster in steel than it does in wood? (Hint: Think about the densities of the two materials, and how the particles might be arranged.)

On which body would a 100kg man have the least gravitational potential energy when lifted to a height of 3 meters

Which of the following factors can negatively affect development? a. Political corruption and instability b. Lack of resources c. Lack of education d. All of the above

A golf ball is hit with an initial velocity of 155 ft/s at an angle of 23 degrees with the horizontal. After 1.4 seconds, how far has the golf ball traveled horizontally and vertically?. a. 199.7 feet horizontally and 75.2 feet vertically. b. 60.