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3 years ago

Identify three devices that use Convex lenses.

2 answers:

6 0

Microscope lenses , glasses for people who can't see faraway as well and microwave lenses which reflect electromagnetic radiation. Oh and curved mirrors.

AleksAgata [21]3 years ago

6 0

Answer:

Explanation:

Convex lens is the lens which is used to converge the rays of light after refraction.

When the rays of light are coming parallel to the principal axis then after refraction they goes from the focus.

It is used as rear view mirror in automobiles. In this case it pelroduces small and erect image of faroff objects.

It is used in spectacles using for hypermetropia.

It is used in microscopes and telescopes.

Our eye also have a convex lens which forms images on retina.

You might be interested in

Express the number in scientific notation: 4/100

ankoles [38]

Answer:

4*10^-2

Explanation:

for the scientific notation the first number must be between 1 and 10, so in this case it is 4. 4/100 is also equal to 0.04, and if we could the number of places before 4, there are two, therefore 4 times 10 to the power of -2

5 0

3 years ago

A 2,537-kg truck moving at 14 m/s strikes a car waiting at a traffic light, hooking bumpers. The two continue to move together a

slavikrds [6]

Answer:

1902.75 kg

Explanation:

From Law of conservation of momentum,

m₁u₁ + m₂u₂ = V (m₁ + m₂).................... Equation 1

make m₂ the subject of the equation,

m₂ = (m₁V - m₁u₁)/(u₂-V)..................... Equation 2

Where m₁ = mass of the truck, m₂ = mass of the car, u₁ initial velocity of the truck, u₂ = initial velocity of the car V = common velocity

Given: m₁ = 2537 kg, u₁ = 14, V= 8 m/s, u₂ = 0 m/s ( as the car was at rest waiting at a traffic light)

Substituting into equation 2.

m₂ =[2537(8) - 2537(14)]/(0-8)

m₂ = (20296-35518)/-8

m₂ = -15222/-8

m₂ = 1902.75 kg.

Thus the mass of the car = 1902.75 kg

5 0

4 years ago

Water is the only pure substance that exists as a liquid at normal Earth temperatures.

gladu [14]

Here are many things that exist as liquid at "normal" Earth temperatures. I would bet that you've seen a demonstration or someone use something with liquid mercury.

<span>FALSE </span>

<span>Hope this helps.</span>

4 0

3 years ago

Which change will cause the gravitational force between a baseball and a soccer ball to increase? Select three options. Moving t

almond37 [142]

The three options are 1,3 and 5 Moving the balls closer together. The distance decreases and forces increase.

<h3>What is the gravitational force?</h3>

The gravitational force ia s type of force has the ability attracts any two objects with mass. Gravitational force tries to pull two masses towards each other.

The value of the gravitational force is given by;

$F_g=\frac{ Gm_ 1m_2}{r^2}$

It is observed that the gravitational force is directly propotional to the product of mass and inversly propotional to the square of the distance between them.

So, the correct options are :

(1) Moving the balls closer together. The distance decreases and forces increase.

(3) Wrapping the soccer ball in layers of duct tape will also increase force because the mass will increase.

(5) Similarly, putting the baseball in a plastic case will increase mass, and hence force increases.

Hence the three options are 1,3 and 5.

To learn more about the gravitational force refer to the link;

brainly.com/question/24783651

3 0

2 years ago

What are we measuring when you find the temperature of an n substance?

Yuki888 [10]

By measuring the expansion of the substance. In that case you use a thermometer

5 0

3 years ago