Answer:
A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.
Explanation:
Power refers to the amount of work done (or energy consumed) per unit of time. It is usually measured in watts (W), which is equal to 1 Joules per second (
)
So, by definition, to calculate the power consumed or supplied in a time interval the following expression is used:
where P is the power measured in Watts, W is the work measured in Joules, and t is the time measured in seconds.
In this case:
- P=100 Watt
- W= 10,000 J
- t= ?
Replacing:
Solving:
t=100 seconds
<u><em>
A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.</em></u>
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Answer:
A hypertonic solution has increased solute, and a net movement of water outside causing the cell to shrink. A hypotonic solution has decreased solute concentration, and a net movement of water inside the cell, causing swelling or breakage.
Explanation: hope this helps :) sorry if it's wrong :(
Answer:
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. <u>Cold water is more dense and will sink in room-temperature water.</u>
<u></u>
<em>V = 151 mL = 151 cm³</em>
<em>d = 0,789 g/mL = 0,789 g/cm³</em>
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d = m/V
m = d×V
m = 0,789×151
<u>m = 119,139g</u>
