Answer:
461.88 N
Explanation:
= Weight of the swing = 800 N
= Tension force in the rope
= Horizontal force being applied by the partner
Using equilibrium of force in vertical direction using the force diagram, we get
![T Cos30 = F_{g}\\T Cos30 = 800\\T = \frac{800}{Cos30} \\\\T = 923.76 N](https://tex.z-dn.net/?f=T%20Cos30%20%3D%20F_%7Bg%7D%5C%5CT%20Cos30%20%3D%20800%5C%5CT%20%3D%20%5Cfrac%7B800%7D%7BCos30%7D%20%5C%5C%5C%5CT%20%3D%20923.76%20N)
Using equilibrium of force in horizontal direction using the force diagram, we get
![F = T Sin30\\F = (923.76) (0.5)\\F = 461.88 N](https://tex.z-dn.net/?f=F%20%3D%20T%20Sin30%5C%5CF%20%3D%20%28923.76%29%20%280.5%29%5C%5CF%20%3D%20461.88%20N)
Answer:
C
Explanation:
got a one hundred on the test
Where are the questions so that I can deliver a more accurate answer.
<h2>
Answer:</h2>
1000th multiple of the standard reference level for intensities.
<h2>
Explanation:</h2>
The sound intensity level (β), measured in decibels, of a sound with an intensity of I is defined as follows;
β = 10 log (I / I₀) --------------------(i)
Where;
I₀ = reference intensity
Given from the question;
β = sound level = 30dB
Substitute this value into equation (i) as follows;
30 = 10 log (I / I₀)
Divide both sides by 3;
3 = log (I / I₀)
Take antilog of both sides;
10^(3) = (I / I₀)
1000 = I / I₀
Solve for I;
I = 1000I₀
Therefore the intensity of the sound is 1000 times the standard reference level for intensities (I₀)
Answer:
A. The upward pressure gradient force is balanced by gravity.
Explanation:
A. is correct because the pressure difference is actually generated by gravity. As in the following formula for the pressure at different points:
![p = p_0 + \rho g h](https://tex.z-dn.net/?f=p%20%3D%20p_0%20%2B%20%5Crho%20g%20h)
where
are the pressure at 2 points, ρ is the density of the fluid, g is the gravitational constant, and h is the height difference.
B is incorrect because friction in air is too small to make an effect.
C is incorrect because the Coriolis force is horizontal, not vertical.
D is incorrect because a difference of 500 hPa = 50000 Pa, this is half of the atmospheric pressure.
E is incorrect because temperature cannot generate force.