Answer:
1.) h = 164.8 m
2.) U = 49.1 m/s
3.) t = 1.43 seconds
Explanation:
1.) A soccer ball is dropped from the top of a building. It takes 5.8 seconds to fall to the ground. The height of the building is...?
Since the soccer ball is dropped from the building, the initial velocity U will be equal to zero
Using second equation of motion
h = Ut + 1/2gt^2
Substitutes the time into the formula
h = 1/2 × 9.8 × 5.8^2
h = 164.8 m
2. The Falcon 9 launches to a height of 123 meters. What is its vertical initial velocity?
At maximum height final velocity = 0
Using the third law of motion
V^2 = U^2 - 2gH
0 = U^2 - 2 × 9.8 × 123
U^2 = 2410.8
U = 49.1 m/s
3. An apple falls from rest off a 10.m m tree. How long will it take before it hits the ground?
Since the apple fall from rest, the initial velocity U will be equal to zero
Using the second equation of motion,
h = Ut + 1/2gt^2
substitute all the parameters into the formula
10 = 1/2 × 9.8 × t^2
10 = 4.9t^2
t^2 = 10/4.9
t^2 = 2.04
t = 1.43 seconds
<em>The answer you are looking for is: </em>
<em><u>True </u></em>
<em>Hope that helps!! </em>
<em>Have a wonderful day!!</em>
Answer:
An egg with a thick shell.
Explanation:
Hope this helps.
<span>Under normal conditions, the forced expiratory volume is normally 75-85 % of the vital capacity.
According to its definition, forced expiratory volume (FEV) refers to "how much a person can exhale during a forced breath." And a person can exhale from 75 to 85 percent of their entire breathing capacity. This is one of the tests to check the function of the lungs. </span>
Answer:
option d)
Explanation:
The amount of heat required to convert the 1 g of ice at 0 degree C to 1 g water at 0 degree C is called latent heta of fusion.
H = m Lf
where,, h is the heat required, m is the mass and Lf is the latent heat of fusion
1140 = m x 79.7
m = 14.3 g
