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ivanzaharov [21]
2 years ago
12

A virtual image formed by a concave mirror is always enlarged. O True O False

Physics
1 answer:
Dmitry [639]2 years ago
8 0

Answer:

True

Explanation:

A concave mirror produces real and inverted image when object placed at different locations beyond focus of the mirror.

A concave mirror produces virtual and erect and magnified image when an object placed between focus and the pole of the mirror.

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A mechanic uses a hydraulic car jack to lift the front end of a car to change the oil. The jack used exerts 8,915 N of force fro
Vaselesa [24]

Answer:

63.05 cm²

Explanation:

We use Pascals law to find the answer.

The law says that in an incomprehensible , non-viscous fluid the pressure applied will transmit through out the fluid without a change.

So, Pressure on larger piston = pressure on smaller piston.

      \frac{444}{3.14}  = \frac{8915}{A}

                                     A ≅ 63.05 cm²

3 0
3 years ago
How much work is done when you push a crate horizontally with 150 N across a 13-m floor
Mila [183]
Work = (force) x (distance)

When a force of 150 N pushes through a distance of 13 meters,
it does

             Work = (150 N) x (13 m) = 1,950 joules .
6 0
3 years ago
Different structural forms of the same element are called
julia-pushkina [17]

Answer:

allotropes

Explanation:

4 0
3 years ago
Ionic compounds form crystal structures. molecular structures. pure elements. neutral elements
Naddik [55]

Answer: Option (a) is the correct answer.

Explanation:

Ionic compounds are the compounds whose atoms are combined together by transfer of electrons.

An ionic compound has partial positive charge on the cation and partial negative charge on anion.

For example, NaCl is an ionic compound whose atoms are arranged orderly due to the opposite charges on its atoms.

So, an ionic compound forms a neutral compound but not a neutral element.

Thus, we can conclude that ionic compounds form crystal structures.

3 0
3 years ago
Read 2 more answers
Explain why liquids solidify when they are cooled.
Setler [38]
Because the molecules that move freely begin to compact closer together, with less heat, means less molecular activity. 
8 0
3 years ago
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