Why do scientists ask questions?

A steel tape (a=1.300 E-5 per Celsius degrees) measures 200.0 m at 15.00 degrees celsius. It's length at 55.00 degrees celsius is

which of the materials would be able to scratch Quartz

A balloon is rising vertically above a level, straight road at a constant rate of 5 ft divided by sec. Just when the balloon is 106 ft above the ground, a bicycle moving at a constant rate of 17 ft divided by sec passes under it.

Using a cathode ray tube, Thomson confirmed that

A bear spies some honey 16.0 m away and takes off from rest, accelerating at a rate of 2.0 m/s2. How long does it take the bear to get the treat?

A night lamp uses a 30 W bulb. If it is left on continuously for 8 hours, how much energy will it use?

If a drag racer wins the final round of her race by going an average speed of 92.5 m/s in 4.5 seconds, what distance did she cover

An airplane flies due west (i. e. in the-X direction) between two airports. For one-quarter of the distance it travels at 650.0 km/h and the rest at 750.0 km/h. What is the average velocity (not speed) of the airplane?

1. The "Opportunity" rover that just landed on Mars transmitted music back to Earth. If the distance to Earth at the time was 9x107 km and radio waves (a kind of "light") travel with a speed of 3x108 m/s, how long did it take for the signal to reach

Precipitation is most likely occurring at A because it is located A. On a cold ocean surface B. On a warm land surface C. Near the cold front D. Near the warm front