Answer:
(a) and (b)
Explanation:
Energy is the capacity to do work, and exists in various forms. These forms can be converted one to another by the use of appropriate means. Some examples are sound, mechanical, solar, light, which causes the sensation of vision, etc. energy is measured in Joules (J).
The rate of transfer of energy is called power.
i.e Power =
It is measured in Watts (W).
When a white light is disperses into its colors, gray and black are not part of the colors. And a black sometimes could be as a result of the absorption of all other colors of light.
Answer:
F = 2.49 x 10⁻⁹ N
Explanation:
The electrostatic force between two charged bodies is given by Colomb's Law:
where,
F = Electrostatic Force = ?
k = colomb's constant = 9 x 10⁹ N.m²/C²
q₁ = charge on proton = 1.6 x 10⁻¹⁹ C
q₂ = second charge = 1.4 C
r = distace between charges = 0.9 m
Therefore,
<u>F = 2.49 x 10⁻⁹ N</u>
The displacement in simple harmonic motion is maximum when the velocity is zero
Answer: Option 5
<u>Explanation:
</u>
Displacement is the measure of variation between the end position and starting position. So displacement is path independent, it is completely based on them. As in simple harmonic motions, the net displacement is zero if the velocity seems to be maximum.
Because the motion of simple harmonic is to return to the starting point for a single oscillation. So, the displacement is opposite directions to the velocity. Thus if the displacement is required to be maximum for the simple harmonic motions, the velocity should be zero.
<span> - Most Sunlight is in the visible band from 0.38μ (which we see as violet) to ... but please interpret these symbols to include all the radiation in their respective ...... Approximately 6% of the energy spectrum, hard uv, is absorbed by the upper ...... the 5-10 micron region at a similar intensity to CO2 (10^-20).</span>
The time per lap was calculated by measuring the time for seven laps and dividing the total time by seven.
total time
It is given that the precision is of 0.1 s. it means it is correct upto 1 place beyond decimal.
So, the actual value could vary from 457.800 s to 457.899 s i.e. the time per lap could be 65.400 s to 65.414 s
It means measured time 65.414 s has maximum error of 0.021%. Hence, the measured value is quite precise.