What will happen to the pressure of a gas if its temperature is reduced to -273oC?
It will decrease
it will drop to zero
It will increase
It will remain constant
Correct answer is B
No explanation has been provided for this answer.
201oC
126oC
153oC
185oC
Correct answer is C
T = \(\frac{PV}{nR}\) = \(\frac{7.6 x 10^6 x 10^-3}{6 x 8.3}\)
= 153oC
A radioactive isotope has a decay constant of 10-6s-1.
Calculate its half - life?
5.93 x 106s
6.93 x 105s
6.93 x 109s
5.93 x 107s
Correct answer is B
t1/2 = \(\frac{0.693}{\gamma}\) = \(\frac{0.693}{10^-6}\)
= 6.93 x 105
Which of the following electromagnetic waves has the shortest wavelength?
Visible Light
Ultraviolet rays
Infrared rays
Gamma rays
Correct answer is D
No explanation has been provided for this answer.
40s
10s
20s
5s
Correct answer is B
t = \(\frac{v - u}{a}\) = \(\frac{20 - 0}{2}\)
= 10s