Answer:
when an acount is made online i can also give you the other awnsers
Explanation:
2 minutes = 120s
S (distance) = v (velocity) x t (time)
S= 3 x 120
S = 360m
So, D is a correct answer
Some humans judge temperature without the use of instruments include:
- touching the object
- feeling the radiant energy
<h3>What is temperature?</h3>
Temperature is the measure of the degree of hotness or coldness of a substance.
Temperature of substances are usually measured using thermometers.
The choice of thermometer depends on the temperature range to be measured.
However, some crude ways of measuring temperature include:
- touching the object
- feeling the radiant energy
In conclusion, temperature measures the hotness or coldness of objects.
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Answer:
ΔU= 1.3922 KJ
Explanation:
Given that
Q= 2 KJ
Note- 1 .Heat added to the system taken as positive and heat leaving from the system is taken negative.
2. Work done on the system taken as negative and work done by the system taken as positive.
P =2 atm
V₁= 2 L
V₂=5 L
Work done by the gas W
W= P ( V₂- V₁)
W= 2 ( 5 - 2)
W= 6 atm.L
1 L·atm = 0.1013 kJ
W= 0.6078 KJ
From first law of thermodynamics
Q= W + ΔU
ΔU=Change in internal energy
2 = 0.6078 + ΔU
ΔU= 1.3922 KJ
<u>Answer: </u>Chemical energy, electrical energy, and Mechanical energy (Kinetic energy).
<u>Explanation:</u>
When Simon puts new batteries in his radio controlled car and its controller, the<u> chemical energy to electrical energy</u> which activates the controller. The controller sends a radio signal and the car starts moving. This means that the <u>electrical energy </u> is received by the car and car starts moving. <u>The electrical energy converts into mechanical energy </u>(kinetic energy).