The colours seen on soap bubbles are due to
Diffraction
Refraction
Dispersion
Interference
Correct answer is D
No explanation has been provided for this answer.
If the total force acting on a particle is zero, the linear momentum will
Increase
Decrease
Be Constant
Increase then decrease
Correct answer is C
No explanation has been provided for this answer.
\( 9.0 \times 10^{9}J \)
\( 9.0 \times 10^{10}J \)
\( 6.3 \times 10^{11}J \)
\( 9.0 \times 10^{11}J \)
Correct answer is A
In general, the energy released during nuclear fission is given by the Einstein's mass-energy equation, given by
\( E = \Delta MC^2 \)
Where \( \Delta m\) is the mass defect, and C is the speed of light.
Therefore
\( \Delta m = 0.01% \text{of} 1.0g = \frac{0.01}{100}
\times 1.0g \\
= 1.0 \times 10^{-4} \\
= 1.0 \times 10^{-7}kg\\
\text{Energy Released } = \Delta MC^2 \\
= 1.0 \times 10^{-7} \times (3.0 \times 10^8)^2\\
= 1.0 \times 10^{-2} \times 9.0 \times 10^{16} \\
= 9.0 \times 10^9 J \)
1.32 x 10-44Ns
3.30 x 10-44Ns
1.32 x 10-24Ns
3.30 x 10-24Ns
Correct answer is C
From the uncertainty principle the product of the position and momentum of a sub-atomic particle is equal or greater than planck's constant.
i.e \( \Delta x. \Delta p \geq h. \\
\text{Thus} 5 \times 10^{-10} \times \Delta p = 6.6 \times 10^{-34} \\
\Delta p = \frac{6.6 \times 10^{-34}}{5 \times 10^{-10}} = 1.32 \times 10^{-24}Ns\\
\text{Therefore Uncertainty in the momentum } = 1.32 \times 10^{-24}Ns \)
5.1 x 103ms-1
4.2 x 103ms-1
3.6 x 103ms-1
2.8 x 103ms-1
Correct answer is A
The speed of sound in a material is given as:
\( V = \sqrt{\frac{E}{P}}, Where\\
E = \text{Young's modulus} \\
P = \text{Density }\\
\text{Therefore } V = \sqrt{\frac{7.0 \times 10^{10}}{2.7 \times 10^3}} = 5091.75\\
= 5.1 \times 10^3MS^{-1} \)