1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ycow [4]
3 years ago
6

Why can concave mirror is used in cosmetic mirror​

Physics
1 answer:
tatuchka [14]3 years ago
4 0

Answer:

"When face is placed between the concave mirror and its focus, it produces a magnified image. This enlarged image of face is helpful in makeup as even pores of skin are clearly visible."

You might be interested in
The driver of a 1,000 kg car travelling at a speed of 16.7 m/s applies the car's brakes when he sees a red light. the car's brak
Dmitry [639]
Energy conservation : 
<span>kinetic energy Ek = braking work W </span>
<span>mV^2 = 2Fb*x </span>
<span>x = mV^2/2Fb = 1000*16.7^2/16.000 = 17.43 meters</span>
6 0
3 years ago
Read 2 more answers
When we add or remove energy from a substance, what kind of changes can we observe? Can they happen at the same time ?
const2013 [10]

Answer:

When you add energy to a substance?

One change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules. The temperature at which a substance goes from a solid to a liquid is it melting point.

When you remove energy from a substance?

When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.

Explanation:

The addition of energy increases the kinetic energy of the particles, which reduces the intermolecular forces between the particles. Freezing occurs when a liquid becomes a solid and energy is released.

Atoms lose energy when they change from solid to liquid or gas and quid to gas.

7 0
2 years ago
This rock known as balanced rock sits on a thin spike of rock in a canyon in Idaho. Explain the that keep the rock balanced on i
Ivahew [28]
Based on the given picture above, I can say that this kind of rock is what we call a PRECARIOUS BOULDER, or in simpler terms, it is called a BALANCING ROCK. It is a geological formation that occurs naturally. This can be found in several parts of the earth. How the rock is kept balanced on its tiny pedestal is that it is firmly attached to a base rock or a stem. 
6 0
3 years ago
Read 2 more answers
An example of an object in projectile motion is
Usimov [2.4K]

Answer: a. a leaping frog

Explanation: In a projectile motion the object must have a certain path or trajectory with respect to a certain angle. For the leaping frog its velocity can be resolve into components having the final velocity at the highest point to be zero.

4 0
3 years ago
Read 2 more answers
A horizontal uniform bar of mass 3 kg and length 3.0 m is hung horizontally on two vertical strings. String 1 is attached to the
kirill115 [55]

Answer:

T₁ = 2.8125 N

Explanation:

The equilibrium equation of the moments at the point where string 2 is located on the bar is like this:

∑M₂ = 0

M₂ = F*d

Where:

∑M₂  : Algebraic sum of moments in the the point (2) of the bar

M₂ : moment in the point 2 ( N*m)

F  : Force ( N)

d  : Horizontal distance of the force to the point 2 ( N*m

Data

mb = 3 kg : mass of the  bar

mm = 1.5 kg :  mass of the  monkey

L = 3m : lengt of the bar

g = 9.8 m/s²: acceleration due to gravity

Forces acting on the bar

T₁ : Tension in string 1 (vertical upward)

T₂ : Tension in string 2 (vertical upward)

Wb :Weihgt of the bar (vertical downward)

Wm: Weihgt of the monkey  (vertical downward)

Calculation of the weight of the bar (Wb) and of the monkey(Wm)

Wb = m*g = 3 kg*9.8 m/s² = 29.4 N

Wm = m*g = 1.5 kg*9.8 m/s² = 14.7 N

Calculation of the distances  from forces the point 2

d₁₂ = (3-0.6) m = 2.4m  : Distance from T1 to the point 2

db₂ = (3÷2) m = 1.5 m : Distance from Wb to the point 2

dm₂ = (3÷2) m = 1.5 m : Distance from Wm to the point 2

Equilibrium  of moments at the point  2 on the bar

∑M₂ = 0

T₁(d₁₂) - Wb(db₂) - Wm(dm₂) = 0

T₁(2.4) -3*(1.5) - 1.5*(1.5) = 0

T₁(2.4) =3*(1.5) + 1.5*(1.5)

T₁(2.4) =6.75

T₁ = 6.75 / (2.4)

T₁ = 2.8125 N

5 0
3 years ago
Other questions:
  • The movie "The Gods Must Be Crazy" begins with a pilot dropping a bottle out of an airplane. A surprised native below, who think
    7·1 answer
  • What does 'equivalence' mean in circuit diagrams​
    9·1 answer
  • How do you determine the density of an empty plastic jug?
    12·2 answers
  • PLS HELP! If a person has a weight of 600 N, how much will they weigh on the Moon?
    11·2 answers
  • How many legs a cow has​
    10·1 answer
  • You and your dog are walking along a pond. Your dog looks into the still water and is startled to see its reflection. Which phen
    13·1 answer
  • Difference Between Photometry and Spectrophotometry ?<br><br>​
    5·1 answer
  • 6. Rebecca is playing softball and slides into home plate. Her weight is 600N. The Coefficient of static friction between her cl
    11·2 answers
  • A meteorologist tries to forecast the weather by comparing the past and _______ areas on a weather map.
    10·1 answer
  • If a rock is thrown vertically upward from the surface of Mars with velocity of 20 m/s, its height (in meters) after t seconds i
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!