Physics
Out of the following pairs, which one does not have identical dimension?

Angular momentum and Planck's constant
Moment of inertia and moment of a force
Impulse and Momentum
Work and Torque

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Physics
Should cars have bumpers that collapse under impact?

No, since the colliding car would then ram into the occupants and kill them
Yes, since they help to absorb the impact of a collision and keep the occupants safe
No, since it would be very expensive to get the car repaired
Yes, since the offending car should get damaged and pay for the mistake

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Physics
A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

The wavelength of X-ray photon is less than the wavelength of visible radiation photon.
The frequency of X-ray photon is higher than the frequency of visible radiation photon.
The speeds of both the photons in vacuum are different
Both the photons have different energies.

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