The gas in the balloon has a mass of 0.032 kg. The balloon has a volume of 0.025 m3. Calculate the density of the gas in the balloon.

[2 marks]

What do hydroelectric plants use to generate electrical energy?

A 920-g empty iron kettle is put on a hot stove. How much heat must the kettle absorb to raise its temperature from to The specific heat capacity of iron is?

a horse began running due east and covered 25km in 4.0 hours what is the average velocity of the horse

What type of waves are sound waves, and how do they transfer energy?

The change in color when acetone is placed on the wing is due to the difference between the indices of refraction of acetone and air. Consider light of some particular color. In acetone, A. The frequency of the light is less than in air. B.

If a glass is knocked off of a table that is 1.4m tall, how long does it take for the glass to hit the ground?

Imagine riding On a merry-go-round at the center. As you walk to the outer edge, the merry-go-round slows in order to conserve angular momentum. True or false?

17. (a) Will the electric field strength between two parallel conducting plates exceed the breakdown strength for air (3.0*106 V/m) if the plates are separated by 2.00 mm and 5.

What property of sound enables us to distinguish one sound source from another?

The table below shows the right ascensions of two stars at a location. Star 1 - 4 right ascension (in Hour) Star 2 - 3 right ascension (in Hour) Which of these statements is correct about the stars?