A cross country runner runs 20 km in 4 hours. what is his average speed

A gate at the bottom of a dam is 10 ft tall by 30 ft wide. The specific weight of the water is 62.4 lbf/ft3. If the water is 50 ft deep, the total force on the gate is most nearly:

How long would it take to reach Jupiter? in years, months, days, hours?

How much energy is needed to generate 0.71 x 10-16 kg of mass?

Which element is most likely to bend without breaking? carbon (C) O iodine (1) silicon (Si) O cobalt (Co)

Which of the following states of matter has mass? (a) - gas (b) - plasma (c) - all the above

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?