A large container of water is sitting on a balance. The weight of the container plus the water is 10 newtons. An object the weight of 7 newtons hanging from a forcemeter is lowered towards the surface of the water . what reading on the force meter would you expect?
Answers
Answer:
3N
Explanation:
Note that when an object is immersed in water it weighs less.
This means the weight seen is the apparent weight.
Now in water there is upthrust and is a counter force acting on the object and this force is opposite to the weight of the fluid alongside the container 10N
The apparent weight is the real weight - the upthrust
7N-10 = -3N
The essence of the negative sign is to show that this force is acting in opposite direction to the weight.
Note: the upthrust is 10N and it's opposite to the weight of the fluid and the tube on which the object on the force meter is subjected to.
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Answers
Answer:
At focus.
Explanation:
When the object is placed at the focus of a concave mirror, the image will form at infinity. The formed image is real and inverted and its size is highly enlarged.
When the object is placed between the pole and the focus, the image will formed behind the mirror. The formed image is virtual and erect and its size is enlarged. This is the only case when the formed image is virtual and erect.
Answers
Answer: The given statement is False.
Explanation:
Potential energy is defined as the energy possessed due to the height of the object.
Mathematically,
where,
= potential energy of the rock
m = mass of the rock
g = acceleration due to gravity =
h = height of the cliff from where the rock is thrown
- When height of the cliff is 200 m
Putting values in above equation, we get:
- When height of the cliff is 600 m
Putting values in above equation, we get:
So,
Potential energy of the rock at 600-m high cliff is more than the potential energy of the rock at 200-m high cliff
Hence, the given statement is False.
Answers
the sum of their individual magnitudes, then they are not both
acting in the same direction.
That's all you really know about them. They can be in ANY two
different directions; just not both in the same direction.
If they were both in the same direction, then the magnitude of
their vector sum would be the sum of their magnitudes, and
the direction of their vector sum would be the same direction
as both of them.
B. volcano
C. river
D. plain
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The one feature that is not found on the ocean floor is a river. A river and an ocean would not be found together, even on the ocean floor.
↑ ↑ ↑ Hope this helps! :D
Answers
Answer:
The principle of training that is related to overload and time reversibility is the principle of Specificity.
Answers
The wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.
What is wavelength?
Wavelength is defined as the space between waves' crests, particularly between electromagnetic or sound wave points. A recurring event's frequency is measured by how many times it occurs in a unit of time. To underline the difference from spatial frequency, it is also occasionally referred to as temporal frequency.
There is an inverse relationship between the frequency and the wavelength of the waves as the wavelength increases the frequency decreases and if the wavelength decreases the frequency increases.
Given that a wave has 5 complete waves occupying a length of 20m. The wavelength of the wave will be calculated as below:-
λ = Distance / frequency
λ = 20 / 5
λ = 4 meters
Therefore, the wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.
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