Answer:
the water level was shallow beach, then it rose to deep sea, then the water receded to a beach
Answer:
5.4 m
Explanation:
mass, m = 34 kg
initial velocity, u = 9 m/s
final velocity, v = 0 m/s
coefficient of friction, μ = 0.6
Angle of inclination, θ = 10°
Let teh distance traveled before to come into rest is d.
According to the work energy theorem, the work done by all the forces is equal to the change in kinetic energy of the block.
Work done by the gravitational force = W1 = - mg Sinθ x d
Work done by the frictional force = W2 = - μ N = - μ mg Cosθ x d
negative sign shows that the direction of force and the direction of displacement is opposite to each other.
Total work done W = W1 + w2
W = - 34 x 9.8 x Sin 10 x d - 0.6 x 34 x 9.8 x cos 10 x d
W = - 254.86 d
Change in kinetic energy = 0.5 x m (v^2 - u^2)
= 0.5 x 34 (0 - 81) = - 1377
So, W = change in KE
- 254.86 d = - 1377
d = 5.4 m
Answer:
<em> 30720 oscillation.</em>
Explanation:
Frequency: This can be defined as the number of oscillation completed in a seconds. The S.I unit of frequency is Hertz.
<em>From the question,</em>
<em>The frequency of the string set is 512 Hz,</em>
<em>These means that the spring set complete 512 oscillation in one seconds</em>
<em>I.e</em>
<em>if its completes in one seconds 512 oscillation.</em>
<em>Then, in one minutes, it will complete x oscillation.</em>
<em>x = 512×1min/1seconds</em>
<em>But 1 minutes = 60 seconds</em>
<em>x = 512×60/1</em>
<em>x = 30720 oscillation.</em>
<em />
Answer:
F = 5
Explanation:
F = m x v^2/r = 2 x 10^2/5 =200/5 = 40 (N)
Yes, this is accurate. While "dark matter" might exist, it is still more of a theory, it is not yet defined properly. As far as we truthfully know, the entire universe is just matter and energy.