In which of the following fields is repulsion NOT experienced?
Electrical only
Gravitational only
Magnetic only
Magnetic and electrical
Magnetic and gravitational
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements about the pressure in a liquid is NOT correct? It
acts in all direction
changes with the material of the container
is the same at all points in the same horizontal plane
varies with the density of the liquid
varies with the depth of the liquid
Correct answer is B
No explanation has been provided for this answer.
220
222
224
226
228
Correct answer is B
The equation above is Beta-decay:
where β is an electron → \(^{0} _{-1}e\)
2β in the equation = \(^{0} _{-1}e\) + \(^{0} _{-1}e\) → \(^{0} _{-2}e\)
\(^{222}_{86}Rn\) → \(^{x}_{88}Ra\) + \(^{0} _{-2}e\) + energy
where \(^{x}_{88}Ra\) + \(^{0} _{-2}e\) → \(^{222}_{86}Rn\)
: x = 222 for element Radon [ \(^{222}_{88}Ra\)
Which of the following substances undergoes sublimation?
Ether
Ice
Iodine
Naphthalene
Turpentine
Correct answer is C
No explanation has been provided for this answer.
The space between the two walls of a vacuum flask is completely evacuated to reduce heat loss by
condensation
conduction
convection
evaporation
radiation
Correct answer is C
No explanation has been provided for this answer.