Which of the following statements about a neutral atom is correct? The
core is composed of electrons and protons
number of electrons is equal to that of neutron
number of neutrons is equal to that of protons
number of protons is equal to that of electrons.
Correct answer is D
Atoms are neutral; they contain the same number of protons as electrons.
The area under a velocity-time graph represents
speed
acceleration
moment
distance
Correct answer is D
No explanation has been provided for this answer.
An instrument used to measure relative humidity is the?
hygrometer
hydrometer
pyrometer
manometer
Correct answer is A
A hydrometer is an instrument used for measuring the relative density of liquids based on the concept of buoyancy.
A hygrometer measures humidity, the amount of water vapor in air
Which of the following liquids has the highest surface tension?
Soapy water
Cold water
Hot water
oily water
Correct answer is D
No explanation has been provided for this answer.