tra10money
09.02.2021 •
Physics
The diagram below shows two rooms that are at different temperatures
Room at
50°F
Room at
80°F
Closed door
Which statementbest describes what will happen as the door opens between the two rooms?
A The temperature in both rooms will become equal over time.
B
The temperature in each room will remain unchanged
C
The warmer room will cool down to 50 F.
D
The colder room will warm up to 80F
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Ответ:
22.02 m
Explanation:
given,
Force, F = 107 N
angle made with horizontal = 13.5◦
Power develop by the lawn roller = 69.4 W
time = 33 s
distance = ?
Force along horizontal= F cos θ
= 107 cos 13.5°= 104 N
Power =
69.4 =
W = 2290.2 J
Work done= Force x displacement
displacement=
= 22.02 m