Given: Weight W = 100 lbs convert to Kg = 45.36 Kg
Height h = 8 Ft convert to meter = 2.44 m
Time t =10 s
Required: Power output
Formula: P = W/t Work = Force x distance or Work = mgh
P = mgh/t
P = (45.36 Kg)(9.8 m/s²)(2.44 m)/10 s
P = 108.46 J/s
P = 0.15 Horsepower
a) The acceleration of the car is
b) The new acceleration would be
Explanation:
a)
The acceleration of a body is equal to the rate of change of the velocity:
where
is the change in velocity
is the time interval considered
For the data of the car in this problem, we have:
is the initial velocity
is the final velocity
is the initial time
is the final time
Substituting, we find the acceleration:
b)
To solve this part, we can apply Newton's second law of motion, which states that the net force applied on a body is equal to the product between its mass and its acceleration:
where
F is the net force
m is the mass
a is the acceleration
The equation can be rewritten as
We observe that the acceleration is directly proportional to the force: therefore, if the force were cut in half, the acceleration will also halve. Therefore, the new acceleration would be
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Answer:
Because of the frequency off the wave I think
Explanation:
The magnitude of the average friction force on the box is 400 N
What is energy conservation?
It is the principle by which the total energy remains constant in a system that is not subject to external influence.
It states that energy can neither be created nor be destroyed, It may be transformed from one form to another.
Here,
length of the plane, d = 4 m
height of the plane, h = 2 m
work done total, w = 3200 J
kinetic energy on top, KE = 0
Potential energy on top,
PE = weight x height
PE = 800 *2
PE = 1600 J
Now,
Total work done = KE + PE + W (friction)
W (friction) = 3200 - 1600
W (friction) = 1600 J
W (friction) = F (friction) x d
F (friction) = 1600 / 4
F (friction) = 400 N
Hence,
The magnitude of the average friction force on the box is 400 N
option A is correct
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All the light in an agn outburst is emitted: a. at the same frequency.
<h3>
What is an agn outburst
?</h3>
An active galactic nucleus (AGN) is a compact area at the core of a galaxy with much higher-than-normal brightness throughout at least some section of the electromagnetic spectrum and features indicating that the luminosity is not created by stars. Excessive non-stellar emission has been reported in radio, microwave, infrared, optical, ultra-violet, X-ray, and gamma ray wavebands. The non-stellar radiation emitted by an AGN is thought to be the product of matter accretion by a supermassive black hole at the heart of its host galaxy.
Active galactic nuclei are the most brilliant and enduring sources of electromagnetic radiation in the cosmos, and as such, they may be utilised to find faraway objects.
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