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Maksim231197 [3]
2 years ago
12

Which best describes the surface of a concave mirror?

Physics
2 answers:
lina2011 [118]2 years ago
8 0
It curves inward is the answer
garik1379 [7]2 years ago
6 0

Answer:

It curves inward

Explanation:

Of the choices given it is the only one that makes sense

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Sound waves in air travel at approximately 330m/s. Calculate the frequency of a 2.5m-long sound wave.
dusya [7]
Frequency = speed ÷ wavelength
= 330m/s ÷ 2.5m
= 132 Hz
8 0
3 years ago
Select the statement that best describes gravity.
pav-90 [236]

Explanation:

Gravity is the force of attraction between two objects. It depends upon the mass of the objects and the distance between the objects. Mathematically, the force of gravity is given by :

F=G\dfrac{m_1m_2}{d^2}

Where

G is the universal gravitational constant

m_1\ and\ m_2 are masses

d is the distance between two masses

So, statement (2) describes gravity "Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects".

6 0
3 years ago
Which data table describes the Sun? A. Composition mostly frozen nitrogen Mass 258.9 × 1018 kg B. Composition mostly hydrogen an
marshall27 [118]

The Sun is a star around which our planet Earth and other planets and satellites of our solar system revolve along specific orbits. Sun appears to be spherical in shape and consists of glowing hot gases. It contains mostly hydrogen and helium gases. The temperature of the gas mixture is extremely high.

Therefore, the Sun mostly composed of hydrogen and helium gases.

(Answer) B. Composition mostly hydrogen and helium gas, Mass 1.989 x 10^30 Kg

7 0
3 years ago
A block with a mass of 8.7 kg is dropped from rest from a height of 8.7 m, and remains at rest after hitting the ground. 1)If we
Harlamova29_29 [7]

To solve this problem we will apply the concepts related to gravitational potential energy.

This can be defined as the product between mass, gravity and body height.

Mathematically it can be expressed as

\Delta P = mgh

\Delta P = (8.7)(9.8)(3)

\Delta P = 255.78J

Therefore the change in the internal energy of the system is 255.78

7 0
3 years ago
The diagram shows a charge moving into an electric field. The charge will most likely leave the electric field near which letter
Simora [160]

you haven't attached the diagram, but i assume that this diagram is what you were talking about

Answer:

near Y

Explanation:

the electric field lines goes from a positive charge to a negative charge. This means that a positive charge would move in the same direction of the field lines, while a negative charge would move in the opposite direction of the field lines. the field lines are created from +vely charged plate to -vely charged plate so the negative charged particles moves towards the lower plate which is positively charged, and opposite to the direction of field lines.

5 0
2 years ago
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