1 BTU(British thermal unit) is equal to how many joules?
A. 955 joules
B. 990 joules
C. 1055 joules
D. 1211 joules
Who invented the battery?
A. Nicolas Carznot
B. Alessandro Volta
C. Michael Faraday
D. George Bessel
Which energy is changed by a loudspeaker into sound energy.
A. Chemical
B. Electrical
C. Light
D. Kinetic
(more…)
According to NASA on which planet purple rocks are found?
A. Jupitar
B. Mars
C. Earth
D. Neptune
How many valence electrons are in chlorine(cl) atom?
A. Chlorine has 1 valence electrons
B. Chlorine has 2 valence electrons
C. Chlorine has 7 valence electrons
D. Chlorine has 6 valence electrons (more…)
Hailey’s comet becomes visible after every_________?
A. 86 years
B. 76 years
C. 1000 years
D. 365 years
_________ planets orbits around the sun in a clockwise direction?
A. Earth
B. Mercury
C. Jupiter