Kathy drew a timeline to show some of the major events that occurred during the evolution of the universe. Which best describes
1 answer:
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Answer:
20.3N
Explanation:
Given parameters:
Area of the eardrum = 0.0002m²
Pressure on the eardrum = 1atm = 101325Nm⁻²
Unknown:
Force exerted on the eardrum = ?
Solution:
Pressure is the force per unit area impacted on a body.
Pressure =
Force = Pressure x area
Now insert the parameters and solve;
Force = 101325Nm⁻² x 0.0002m² = 20.3N
Answer:
69.66 Joule
Explanation:
mass of bicycle frame, mf = 8.29 kg
mass of wheel, mw = 0.820 kg
radius, r = 0.343 m
velocity, v = 3.6 m/s
There are two wheels in the bicycle.
There are two types of kinetic energy of the system one is kinetic energy of rotation and another is rotational kinetic energy.
K = 69.66 J
Answer:
38.8 m
Explanation:
h = -(21 + 1.75) = - 22.75 m
g = - 9.8 m /s^2
Ux = 14.004 m/s
Uy = + 5.376 m/s
Let the ball hits the ground in time t and at a distance d from the base of hill.
Use second equation of motion
h = Uyt + 0.5 at^2
- 22.75 = 5.376 t - 0.5 x 9.8 t^2
4.9 t^2 - 5.376 t - 22.75 = 0
By solving
t = 2.77 second
So, horizontal distance
d = Ux t
d = 14.004 x 2.77 = 38.8 m