Mechanical advantage- the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine<span>.</span>
Answer:
Explanation:
The distance travelled in the free fall is H - h
Since the apple originally started from rest we can use v^2 = u^2 + 2 x g x s where v is the final velocity, g the accln due to gravity and s the distance travelled and u is the initial velocity = 0
So the velocity just before it enters the grass is sq rt [2 x g x (H - h)]
Once in the grass, it slows down at a constant rate which means that the acceleration (a) during this period is constant.
So once again using the same formula we have v = O and u = sq rt[2 x g x (H-h)]
so since v^2 = u^2 + 2 x a x s then
O^2 = 2 x g x (H-h) + 2 x a x h
{O^2 - 2 x g x (H - h)}/(2 x h) = a
The energy consumption rate of the oven is
3 kW = 3000 W = 3000 J/s.
The amount of energy supplied is
9 kJ = 9000 J
The time that the oven will run is
(9000 J)/(3000 J/s) = 3 s
Answer: 3 seconds
1. the max height is solved from v = square root of 2 gy where g is equal to 9.8 m/s2/ hence y is equal to 8.62 meters.
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2. time at max height is solve when velocity = 0. ( 0 = -9.81*t +13); t = 1.325 seconds
3. time required for the entire trip is 2*1.325 equal to 2.65 seconds.
4. without air resistance, the velocity just before the ball hits the ground is the same as its initial velocity, 13 m/s.</span>
d. Butane
Explanation:
The question is asking about the chain isomerism of the compounds.
a. Methane - have 1 carbon atom and does not have isomers.
c. Propane - have 3 carbon atoms and does not have isomers.
b. Ethane - have 2 carbon atoms and does not have isomers.
d. Butane - have 5 carbon atoms and does have two isomers.
You may find the structure of the isomers in the attached picture.
Learn more about:
structure of organic compounds
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