A scientist tests the water in a local pond and finds that it has a pH of 7.9. What is true about the water sample?

How much voltage is required to make 4 amperes flow through a resistance of 20 ohms?

A man on the moon with a mass of 90 kilograms weighs 146 newtons. The radius of the moon is 1.74 x 106 meters, find the mass of the moon. a) 7.36 x 10^ (28) kg b) 2.4 x 10^ (10) kg c) 7.36 x 10^ (22) kg d) 1.43 x 10^ (4) kg

If gas particles start colliding with the walls of their metallic container with increased force, what is their direct effect?. lower gas pressure. higher gas pressure. lower volume of gas. higher volume of gas

A scientist wants to learn about Earth's oceans. Which of the following spheres should she most directly study? a. Atmosphere b. Cryosphere c. Geosphere d. Hydrosphere

When James sprayed liquid deodorant under his arm, the spot felt cold. Which sentence best explains why?

As air temperatures increase, evaporation increases. Warmer temperatures also increase the capacity to absorb water vapor. More water vapor in the atmosphere accelerates the greenhouse effect.

What is the speed of a 50 g rock if its de Broglie wavelength is 3.32 x 10?

The difference between newtons first law of motion and newtons third law of motion

A sound wave traveling at STP has a period of. 0023 seconds. The wavelength of this sound is closest to 1) 1.4E5 2) 6.9E-6 3) 0.76m 4) 76m

Static charge develops on a substance as it acquires or loses protons due to friction. a. True b. False