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Find the wavelength of a radio wave if the frequency is 11 x 10 ^6 Hz and the speed of radio waves in air is 3 x 10 ^8 m/s.

The key equation here is v = fL ( v is wave speed (m/s), f is frequency (Hz), L is wavelength (m)). We need to rearrange it to get L (the wavelength). To do this, we divide by f to get L = v/f. Frequency is ...
EM
Answered by Emma M. • Physics tutor
2757 Views

A bomb of mass 34kg, at rest is detonated. The explosion splits the bomb into two pieces, one of mass 13kg, which is thrown to the left at a velocity of 28 m/s. What is the velocity of the second piece?

In a collision where no external forces act linear momentum is conserved.Convention: Right + left -0=-13x28 + 21xVV=17.33 kg m/s to the right
RC
Answered by Rory C. • Physics tutor
2082 Views

How do you calculate efficiency?

The efficiency is calculated using the equation: ((Total useful output energy)/(Total input energy)) *100 We are essentially trying to calculate what percentage of the input energy is converted into a useful...
RM
Answered by Rachel M. • Physics tutor
2699 Views

What is Fleming's left hand rule?

It's a rule that tells us about the motor effect.If a wire carrying a current enters a magnetic field and the current in the wire is travelling perpendicular to the direction of the magnetic field. The wire ...
GH
Answered by Gary H. • Physics tutor
3479 Views

Describe what red shift is and why i provides evidence for the Big Bang Theory.

Red-shift is the increase in wavelength emitted from distant objects moving away from the observer, making them appear more red.The Big Bang Theory states that the universe began from a singularity which the...
RD
Answered by Robert D. • Physics tutor
2955 Views