D. Get down to the child’s level to talk
Answer:
The wavelength of wave is 2.78 m.
Explanation:
Frequency of a wave is 90 Hz
Speed of a wave is 250 m/s
It is assume to find the wavelength of wave. The formula of speed is given by :
So, the wavelength of wave is 2.78 m.
<span>The waste products of combustion leave the internal combustion engine through the: B) Exhaust valve</span>
Given:
Total distance = 1000 kilometer
Total time = 5 hours
To find:
Average speed = ?
Formula used:
=
Where = average speed
s = total distance
t = total time
Solution:
Average speed of the jet is given by,
=
Where = average speed
s = total distance
t = total time
=
= 200 km/ h
Thus, average speed of the jet is 200 km/h.
Hence, Option (A) is correct.
Answer:
Explanation:
Given
No of moles
Temperature
Initial volume
Final volume
Work done in constant temperature process is
Insert the values