The correct answer for this question is letter C. A hydrometer is used to measure the specific gravity of liquids. Antifreeze or freeze protection is added to make the freezing point lower. Litmus paper, pH tags and color charts are used to determine the acidity of a substance.
Answer:
1000 m
Explanation:
Given that,
The frequency of radio waves f = 300,000 Hz
We need to find the wavelength of these waves.
The formula to find wavelength is as follows :
So, the wavelength of these waves is 1000 m.
Answer:
By putting something like a sheet of glass in the water.
Explanation:
Putting a sheet of glass in the water will make the ripples move slower because the speed of a wave depends on the depth of water.
Answer:
all of them I should say cod they are all asking
The speed of the ball is 27.4 m/s
Explanation:
The speed of an object is given by:
where
d is the distance covered
t is the time taken
In this problem, we have:
d = 300 yards is the distance covered by the golf ball
t = 10 s is the time taken
Keeping in mind that
1 yard = 0.914 m
We can convert the distance from yards to meters:
And substituting into the equation, we find the speed of the ball:
Learn more about speed:
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