Which of the following planets has the smallest diameters_____?
Which of the following planets has the smallest diameters_____?
A. Mercury
B. Marx
C. Pluto
D. Venus
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____________ have no charge?
____________ have no charge?
A. Neutrons
B. Protons
C. Electrons
D. None of TheseMain constituent in air is ___________?
Main constituent in air is ___________?A. Oxygen
B. Nitrogen
C. Hydrogen
D. HeliumThe gas heater gives us heat by __________?
The gas heater gives us heat by __________?A. Radiation
B. Conduction
C. Convection
D. Environmental pressureRadioactivity was discovered by __________?
Radioactivity was discovered by __________?A. Kelvin
B. Thomson
C. Rutherford
D. BacquerelWhich of the following Rays are more Penetrating?
Which of the following Rays are more Penetrating?
A. Beta rays
B. Alpha rays
C. Gamma rays
D. X-raysThe weakest of all fundamental forces is the ________________?
The weakest of all fundamental forces is the ________________?A. Gravitational force
B. Electrostatic force
C. Magnetic force
D. Nuclear force