Meg runs a 10-km race in 45 minutes (0.75 hours). what was her speed in kilometers per hour? a. 7.5 km/hr b. 4.5 km/hr c. 13 km/hr d. 22 km/hr

A 2300-kg truck is traveling down a highway at 32m/s. What is the kinetic energy of the truck? A. 1,200 J, B. 37,000 J, C. 1,200,000 J, D. 37 J

Which of the following would cause the force of kinetic friction to increase? A. A decrease in k B. An increase in s C. A decrease in the normal force D. An increase in the normal force

In a certain oscillating LCcircuit, the total energy is converted from electrical energy in the capacitor to magnetic energy in the inductor in 1.61 μs.

An electron in an atom has an uncertainty of 0.2 nm. If it is doubled to 0.4 nm by what factor does the uncertainty in momentum change?

A box is lowered using a rope. If the acceleration of the box, is 3.3 m/s2 (downward) and its mass is 29.1 kg, what is the magnitude of the tension in the rope?

How would life on earth be different if earth's axis were not tilted with respect to its orbit? A. There would be no seasons. B. There would be no day and night. C. All places would have the same climate. D. The seasons would be much shorter.

What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s?

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?