Newton’s second law gives us the relationship of force F,
mass m and acceleration a. The formula is given as:
<span>F = m a -->
1</span>
However we also know that the relationship of mass m,
density ρ, and volume V is:
<span>m = V ρ -->
2</span>
Therefore substituting equation 2 to equation 1:
F = ρ V a = ρ V g
where a is acceleration due to gravity, ρ is density of
water and V is the volume of the casting, therefore:
F = (1x10^-3 kg/cm^3) (4840 cm^3) (9.8 m/s^2)
F = 47.432 kg m/s^2
F = 47.432 N
Going back to equation 1:
47.432 N = m (9.8 m/s^2)
m = 4.84 kg
<span>Hence the weight of the final casting is 4.84 kg</span>
Answer:
<em>The greatest amount of energy is carried by a wave with the largest frequency.</em>
Explanation:
<em>velocity= frequency X wavelength
</em>
<em>If the three waves moves with the same t the speed of light, then those with the largest frequency have more energy.
</em>
<em>That is to say, a wave with a higher frequency and a lower wavelength will have the highest energy.</em>
The electromagnetic radiation that will be smartest to use is gamma rays.
<h3>
Electromagnetic radiation</h3>
These are waves that does not require material medium for their propagation.
The wave with high frequency has a greater rate of penetration while those with high wavelength has lesser rate of penetration.
Thus, it will be smart to use the wave with high frequency, which means a low wavelength. The electromagnetic radiation with the highest frequency and low wavelength is gamma rays.
Learn more about electromagnetic radiation here: brainly.com/question/25847009
Answer:
11.1 cm
Explanation:
Let d be the depth upto which box dipped into water.
Volume of water displaced
.12\times .12\times d m^3\\
=.0144d
Weight of water displaced = upthrust
=.0144d\times 10^3\times g\\ [ density of water is 1000kg /m³]
=14.4dg This will act upwards.
Total downward force = 1.2 +.4 = 1.6 g
For equilibrium
1.6g = 14.4 gd
d = .111 m
=11.1 cm.