n which of the following types of engine is the air-and-fuel mixture ignited by the heat created during the compression stage, rather than by a spark plug? A. An LP gas engine B. An electric engine C. A rotary engine D. A diesel engine

The Earth moving round the Sun in a circular orbit is acted upon by a force, and hence work must be done on the Earth by this force. Do you agree with this statement?

Do you know which component of the Star Wars movies is possible according to our current understanding of physics?

According to newton's first law of motion what is required to make an object slow down

Savanna regions developed during the Triassic period. true or false

Formula of finding heat change while you have given resistance

If a steam engine produces work, how does the internal energy of the machine change?

When energy is converted from one form to another in a chemical or physical change, which of the following also changes by a measureable amount? Select the correct answer below: a. The total mass in the system b. The force of gravity c.

Which of the following is not a result or consequence of rising average air temperatures on Earth? Glaciers and ice sheets melt. Sea levels rise. Evaporation increases. Salinity increases.

How does the doppler effect explain differences in sound pitch? choose all that apply?

A generator converts