uniform acceleration
instantaneous velocity
initial velocity
average speed
average velocity
Correct answer is D
No explanation has been provided for this answer.
which of the following pairs of physical quantities comprises vectors?
capacitance and inductance
force ratio and velocity ratio
friction and momentum
energy and power
electric field potential and electric field intensity
Correct answer is C
Friction and Momentum both have magnitudes and directions.
Which of the following has the highest surface tension?
cold water
soapy water
warm water
oily water
salty water
Correct answer is A
No explanation has been provided for this answer.
1.48ev
2.21ev
4.42ev
5.75ev
11.51ev
Correct answer is B
K.E = \(\frac{1}{2}\)mv2
E - W = 6.86 - 4.65
= 2.21ev
The half-life of a radioactive substance is 2 seconds. Calculate the decay constant
0.035s-1
0.151s-1
0.347s-1
0.576s-1
1.386s-1
Correct answer is C
\(\lambda = \frac{0.693}{T_{\frac{1}{2}}} = \frac{0.693}{2}\)
= 0.347s-1