Distance covered along the slope is 48 m
Explanation:
A uniform motion is a motion in which the velocity is constant. The distance covered by an object during a uniform motion is given by
where
v is the velocity
t is the time
Here we have:
v = 0.8 m/s (velocity)
t = 1 min = 60 s
Therefore, the distance covered along the slope is:
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Answer:
These fields have electric and magnetic energy, therefore the light wave carries energy.
it does not transport matter
Explanation:
Light is an electromagnetic wave formed by the oscillation of electric and magnetic fields.
These fields have electric and magnetic energy, therefore the light wave carries energy.
But the wave does not need matter for its movement, which is why it transports matter. If we use the criterion of special relativity the mass of a light wave that travels at speed must be zero, so with this criterion it does not transport matter either
Answer:
515.025J
A woman lifts a 35-kg child a distance of 1.5 m and carries her forward for 6.5 m.
How much work does the woman do in lifting the child?
Explanation:
Given;
Mass m = 35kg
Distance of lifting l = 1.5m
Acceleration due to gravity g = 9.81 m/s^2
Workdone = mgl = 35×1.5 × 9.81 = 515.025 J
Answer:
B
Explanation:
The crest of all three waves are of equal height
Answer:
Frequency of the tuning fork[second resonance] = 512 Hz (Approx.)
Explanation:
Given:
Speed of sound = 340 m/s
Length of resonance position above a closed air column = 49.8 cm = 0.498 m
Find:
Frequency of the tuning fork
Computation:
Frequency of the tuning fork[second resonance] = 3v / 4l
Frequency of the tuning fork[second resonance] = 3(340) / 4(0.498)
Frequency of the tuning fork[second resonance] = 512.04
Frequency of the tuning fork[second resonance] = 512 Hz (Approx.)