Which of the following is not a consequence of a force field?
wieght
surface tension
gravitational pull
magnetic force
electric force
Correct answer is B
No explanation has been provided for this answer.
4 : 1
2 : 1
1 : 1
1 : 2
1 : 4
Correct answer is A
Given that a mass N of elements A and B exists, then:
For element A, after 100 years, we have A of mass N/2 remaining
After 200 years, we have A of mass \(\frac{1}{2}\times\frac{N}{2}\) = \(\frac{N}{4}\)
For element B, after 50 years, we have B of mass N/2 remaining
After 100 years, we have B of mass \(\frac{1}{2}\times\frac{N}{2}\) = \(\frac{N}{4}\)
After 150 years, we have B of mass \(\frac{1}{2}\times\frac{N}{4}\) = \(\frac{N}{8}\)
After 200 years,we have B of mass \(\frac{1}{2}\times\frac{N}{8}\) = \(\frac{N}{16}\)
Ratio: \((\frac{N}{4} : \frac{N}{16})\)
=\(4 : 16\) = \(1 : 4\)
Which of the following is not an electromagnetic radiation?
X-ray
Radio waves
Sunlight
Sound waves
Infra-red radiation
Correct answer is D
No explanation has been provided for this answer.
4 x 10 25J
4 x 1021 J
6.4 x 1020 J
6.4 x 10-15 J
2.5 x 1020 J
Correct answer is D
No explanation has been provided for this answer.
I only
II only
III only
I & III only
I, II & III
Correct answer is A
No explanation has been provided for this answer.