Fifty grams of water cooled from 50 'C to 10 'C. If the specific heat of water is 4.2, how much heat was released?

A) 480 J

B) 840 J

C) 4800 J

D) 8400 J

If a pigeon flew 1000 meters north in 48 seconds, what is its average velocity?

What process tends to occur more quickly natural selection or artificial selection?

As the frequency of a wave increases what happens to its period and wavelength if its speed stays the same

John is running down the street and hears dogs barking in the distance. How do the sound waves change as John approaches the barking dogs A The height of the sound waves decreases The height of the sound waves increases The pitch of the sound waves

Explain how carbon dioxide, in its standard state, would compare to the solubilities shown on the graph. A) It would have a high solubility at higher temperatures since it exists in its standards state.

What happens to the resistance of a wire as its length increases? A. The resistance decreases. B. The resistance is not affected by a change in wire length. C. The resistance alternates between high and low values. D. The resistance increases.

What is true about molecular compounds that dissolve in water

What is a lenticular (S0) galaxy? A galaxy with a disk and central bulge like a spiral galaxy, but with no spiral arms A galaxy with a smooth brightness profile, lacking the central bulge and disk of a spiral galaxy A spiral galaxy with fuzzy and

Which process causes wells on land to become saline, making them unusable for drinking water? A. Erosion B. Echo sounding C. Eutrophication D. Groundwater infiltration

A farmer uses a tractor to pull a 150 kg bale of hay up a 15∘ incline to the barn at a steady 5.0 km/h. The coefficient of kinetic friction between the bale and the ramp is 0.40. Part A What is the tractor's power output?