Answer:
Explanation:
frequency of tuning fork = 440 Hz
wave length λ = velocity of sound / frequency
= 343 / 440 m
= .7795 m
= 77.95 cm
λ = 77.95 cm
Let length of rod having fundamental wavelength of 77.95 cm be L
L = λ /2
L = 77.95 / 2
= 38.975 cm .
length of rod = 38.975 cm .
= 0. 39 m
Answer:
Exposing the testicles to high temperatures could lead to problems
with producing sperm.
Explanation:
got it correct on the edge unit test review
Hi Babylilith32,
Your Question:
An experiment was devised to investigate the effects on the temperature of a cup of coffee when cream is added at different time intervals. Hot and cold water were used instead of coffee and cream. First, a container of water heated to 80°C was allowed to sit for 15 minutes. Its temperature was measured at regular intervals. Next, similar temperature measurements were taken for 15 minutes on a new container of heated water, but this time some cold water was added after the 2-minute reading. Finally, the procedure was repeated except that for this last test, the cold water was added after the 12-minute reading. The resulting recorded temperatures were plotted on the graph shown here.
Answers:
1. If you have cool water then you have to add it to the hot water after a few minutes.
2. The independant variable is the cold water
3. The dependant variable is the temperature
4. The control is the hot water without the cold water.
5. The 2 min cold water drops way to much.
Answer:
Explanation:
Given
radius of satellite orbit
And orbital velocity is given by
where M=mass of earth
centripetal acceleration is given
For Model airplane