The statement the mechanical advantage of the lever is 16 is False.
<h3>Mechanical Advantage</h3>
Mechanical advantage MA = d/D where
- d = distance moved by effort and
- D = distance moved by load
Given that the effort arm is 8 meters long, d = distance moved by effort = 8 m.
Also, given that the resistance arm is 2 meters long, D = distance moved by load = 2 m.
<h3>Calculating the mechanical advantage</h3>
So, substituting the values of the variables into the equation, we have
MA = d/D
MA = 8 m/2 m
MA = 4
Since MA = 4, so, the stament is False.
So, the statement the mechanical advantage of the lever is 16 is False.
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Answer: Depends
Explanation:
Depends on how much the diver weighs.
Answer: A)
Explanation: when an electron is placed in a magnetic field, it experiences a force.
This force is given below as
F=qvB*sinθ
F = force experienced by charge.
q = magnitude of electronic charge
v = speed of electron
B= strength of magnetic field
θ = angle between magnetic field and velocity.
What defines the force exerted on the charge is the angle between the field and it velocity.
If magnetic field is parallel to velocity, then it means that θ=0° which means sin 0 = 0, which means
F = qvB * 0 = 0.
The charge being at rest has nothing to do with the angle between magnetic field strength and velocity.
Answer:
229,098.96 J
Explanation:
mass of water (m) = 456 g = 0.456 kg
initial temperature (T) = 25 degrees
final temperature (t) = - 10 degrees
specific heat of ice = 2090 J/kg
latent heat of fusion =33.5 x 10^(4) J/kg
specific heat of water = 4186 J/kg
for the water to be converted to ice it must undergo three stages:
- the water must cool from 25 degrees to 0 degrees, and the heat removed would be Q = m x specific heat of water x change in temp
Q = 0.456 x 4186 x (25 - (-10)) = 66808.56 J
- the water must freeze at 0 degrees, and the heat removed would be Q = m x specific heat of fusion x change in temp
Q = 0.456 x 33.5 x 10^(4) = 152760 J
- the water must cool further to -10 degrees from 0 degrees, and the heat removed would be Q = m x specific heat of ice x change in temp
Q = 0.456 x 2090 x (0 - (-10)) = 9530.4 J
The quantity of heat removed from all three stages would be added to get the total heat removed.
Q total = 66,808.56 + 152,760 + 9,530.4 = 229,098.96 J
Answer:
Synthetic polymers are lightweight
Explanation: took the test
