A 45 kg bear slides, from rest, 11 m down a lodgepole pine tree, moving with a speed of 5.8 m/s just before hitting the ground.
1 answer:
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Answer:
It takes <u>951 seconds</u> to boil a cup of water.
Explanation:
Given:
EMF of the battery (E) = 10.0 V
Internal resistance of the battery (r) = 0.04 Ω
Resistance of the circuit = 'R'
Current measured in the circuit (I) = 11.0 A
Energy required to boil water (U) = 100 kJ = 100 × 10³ J [1 kJ = 10³ J]
Time taken for boiling (t) = ?
We know that, the emf of the battery is given as:
Plug in the given values and solve for 'R'. This gives,
Now, energy required to boil the water is given as:
Plug in the given values and solve for 't'. This gives,
So, it takes 951 seconds to boil a cup of water.
Answer:
0.066m
Explanation:
Step one:
given
frequency =512 Hz
The speed of sound is 340.0 m/s.
Required
The wavelength
Step two:
the formula for wavelength is
substitute the given data