A body moving with a velocity of 20m/s begins to accelerate at 3 m/s 2 . How far does the body move in 3 seconds
Answers
Given v_in = 20 m/s and a = 3 m/s2, assuming that the bodymoves at constant acceleration, the motion is modeled by the equation:
s(t) = (v_in)t + (1/2)a(t^2)
where s(t) is the distance traveled
substituting the given,
s(t) = 20t + (3/2)(t^2)
at t = 3
s(t) = 20(3) + (3/2)(3)^2
= 73.5 m
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Answers
Given:
V1 = 4m3
T1 = 290k
P1 = 475 kpa = 475000 Pa
V2 = 6.5m3
T2 = 277K
Required:
P
Solution:
n = PV/RT
n = (475000 Pa)(4m3) / (8.314 Pa-m3/mol-K)(290k)
n = 788 moles
P = nRT/V
P = (788 moles)(8.314 Pa-m3/mol-K)(277K)/(6.5m3)
P = 279,204 Pa or 279 kPa
Answers
Volume and pressure are inversely proportional magnitudes, so we can write:
Machines consume energy until no energy remains.
Energy transferred to a machine equals energy transferred from it.
Engineers break the law of conservation of energy by using ma
Answers
In short, Your Answer would be Option C
Hope this helps!
Answer:
Energy transferred to a machine equals energy transferred from it. It is because according to conservation of energy we can't create or destroy energy so, energy remains constant however, their form can be change by machine's
Hope this helps!
Explanation:
In short, Your Answer would be Option C
Answers
Use the formula:
h = vo*t - (1/2)gt^2
Since the rock experiences freefall, initial velocity (vo) is zero:
h = -(1/2)gt^2
Substitute:
h = -(1/2)(-9.8)(3.8^2)
h = 70.756
Answers
Answer
Tycho Brahe
Explanation
Tycho Brahe who was born on 1546. He was an astronomer.Tycho Brahe spent 20 years in plotting the positions of the planets and he was among those astronomers who helped in giving the heliocentric model of the universe..
Answers
Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. What effect does this have on collisions
The effect of the gymnast on the collision will increase. An elastic collision is when two bodies collide and separates after collision conserving the total kinetic energy before and after collision.
Answer:
it increces the time of the fall
Explanation: