Describe the shape of a convex lens and a concave lens. Describe what effects each type of lens has on light. Then describe how you might use these types of lenses

PLEASE HURRY I AM IN A SCIENCE TEST DUE AT 1:30

Answer:

progession

Explanation:

Answer:

a. I =  -3mv₀/2 b. F = -3mv₀/2t

Explanation:

a. Use the impulse-momentum to write an equation for the  system which is the cart only.

We know Impulse , I = Δp where Δp = change in momentum.

Now, Δp = m(v - u) where m = mass of cart, u = initial velocity of cart = v₀ and v = rebound velocity of cart = -v₀/2 (negative since it moves in the opposite direction to u)

So, I =  Δp = m(v - u)

Substituting the values of the variables into the equation, we have

I = m(-v₀/2 - v₀) = -3mv₀/2

So, I =  -3mv₀/2

b. If the time during which the bumper exerts a force on the cart is t, write an expression for the force F exerted on the cart in terms of the given variables.

We know impulse I = Ft where F = force exerted on the cart and t = time force acts

Also, I = -3mv₀/2

So, Ft = -3mv₀/2

F = -3mv₀/2t

Answer:

If an object pushes out an amount of water equal to its own weight, the upward force acting on it will be equal to gravity - and the object will float.

Explanation:

The buoyant force has an impact on the object in the water and equals the weight of the water displaced by the object. Every object placed in water has some buoyancy force that pushes it against the gravitational force, and this means that any object loses weight in the water.

Answer:0.61

Explanation:

the answer is 0.61 because i just typed it into acellus abs it was right

Answer:

Friction

Explanation:

Because the brake pad is rubbing alongside the wheel to slow the body of the car down

Answer:

0.31s

Explanation:

Given parameters:

Frequency of the ocean waves  = 3.2Hz

Unknown:

Period of the waves  = ?

Solution:

The period of a wave is the inverse of the frequency of a wave;

       Period  = [tex]\frac{1}{Frequency}[/tex]

Now insert the parameters and solve;

       Period  = [tex]\frac{1}{3.2}[/tex]   = 0.31s

The period of the wave is 0.31 s.

The question above can be solved using the relationship between period and frequency (T = 1/F).

Frequency: This can be defined as the number of complete oscillations performed by a wave in one second.

Period: This is the time required by a wave to complete one oscillation.

The relationship between period and frequency

Formula:

T = 1/F....................... Equation 1

Where:

From the question,

Given:

Substitute this value into equation 1

Hence, the period of the wave is 0.31 s.

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Answer:

Travels through solid materials, and air.... but it can also travel through the vacuum of space

Explanation:

Answer:

d)no unit

Explanation:

refractive index is a unit less quantity.

Answer:

imma try nd help cuz i havent seen anybody answer so

1.sara

2.same for both

3.tom

Explanation:

Answer:

Explanation:

Answer:

608

Explanation:

Trust me

Answer:

608

Explanation:

I only answer after making sure the answer is correct and I get the green tick, not the red cross (Acellus)

Answer:

The potential energy (P.E) at the top is 392 J

The kinetic energy (K.E) at the top is 0 J

The potential energy (P.E) at the halfway point is 196 J.

The kinetic energy (K.E) at the halfway point is 196 J.

Explanation:

Given;

mass of the rock, m = 2 kg

height of the cliff, h = 20 m

speed of the rock at the halfway point, v = 14 m/s

The potential energy (P.E) and kinetic energy (K.E) when its at the top;

P.E = mgh

P.E = (2)(9.8)(20)

P.E= 392 J

K.E = ¹/₂mv²

where;

v is velocity of the rock at the top of the cliff = 0

K.E = ¹/₂(2)(0)²

K.E = 0

The potential energy (P.E) and kinetic energy (K.E) at the halfway point;

P.E = mg(¹/₂h)

P.E = (2)(9.8)(¹/₂ x 20)

P.E = 196 J

K.E = ¹/₂mv²

where;

v is velocity of the rock at the halfway point = 14 m/s

K.E = ¹/₂(2)(14)²

K.E = 196 J.

The potential energy (P.E) at the top is 392 J

The kinetic energy (K.E) at the top is 0 J

The potential energy (P.E) at the halfway point is 196 J.

The kinetic energy (K.E) at the halfway point is 196 J.

Since

mass of the rock, m = 2 kg

height of the cliff, h = 20 m

speed of the rock at the halfway point, v = 14 m/s

We know that

P.E = mgh

P.E = (2)(9.8)(20)

P.E= 392 J

Now

K.E = ¹/₂mv²

here.

v is velocity of the rock = 0

K.E = ¹/₂(2)(0)²

K.E = 0

Now

The potential energy (P.E) and kinetic energy (K.E) at the halfway point;

P.E = mg(¹/₂h)

P.E = (2)(9.8)(¹/₂ x 20)

P.E = 196 J

K.E = ¹/₂mv²

Here,

v is the velocity of the rock= 14 m/s

K.E = ¹/₂(2)(14)²

K.E = 196 J.

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Answer:

The chemical symbol for sodium carbonate is . The decomposition of sodium carbonate is: The decomposition of sodium bicarbonate, will result in the formation of sodium oxide, and carbon dioxide, . Hence, carbon dioxide, will produce with sodium oxide, on decomposition of

Hope this will help you

Answer:

38 kg.m/s

Explanation:

Momentum

Momentum is often defined as "mass in motion".

Since all objects have mass, if it's moving, then it has momentum. The momentum is a vector and It can be calculated as the product of the mass by the velocity of the object:

[tex]\vec p = m\vec v[/tex]

If only magnitudes are considered:

p = mv

We are given that an m=9.5 kg turkey is running at v=4 m/s. Below is the formatted data:

p = ?

m = 9.5 kg

v = 4 m/s

Formula

p = m v

[tex]p = 9.5 \cdot 4[/tex]

p = 38 kg.m/s

The filled table is included below

The question is incomplete, the complete question is;

A car is moving  at a constant speed of 3 m/s when a force of 25N is acting on it. What will happen if the force is changed to 35N?

The car will move at a constant speed of 13 m/s

The speed of the car will not change.

The speed of the car will increase.

The speed of the car will decrease to 1 m/s

Answer:

The speed of the car will increase.

Explanation:

When a the force acting on an object moving at constant velocity is changed, its velocity changes accordingly.

The question said that the car was moving at a constant velocity of 3m/s when a 25 N force is applied, then the car must move faster than 3 m/s when a 35 N force is applied since the 35N force is greater than the 25 N force.

Hence the answer above.

electromagnetic

all electromagnetic waves move at the speed of light.

so yes, light waves are electromagnetic waves :)

i hope this helps!

Answer:

D) kg*m/s^2

Explanation:

One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.

Answer:

A

Explanation:

The element that unicornium-210 (210Ui) could not decay into based on atomic mass alone is 90Sr.

A radioactive isotope is a type of atom that has an unstable nucleus that spontaneously decays or disintegrates, emitting radiation in the form of particles or electromagnetic waves. This process is known as radioactive decay.

The unstable nature of the nucleus arises from having too many or too few neutrons compared to the number of protons in the atom, which affects the stability of the atomic nucleus. The decay of radioactive isotopes can have practical applications in fields such as nuclear medicine, energy production, and environmental monitoring, but can also pose health and safety risks if not handled properly.

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Answer:

Inverse

Explanation:

The force of gravity between two objects follows an inverse square law with regard to the distance between them.

The inverse square law refers to any law that stipulates that a particular quantity varies inversely to the square of the distance to its source and according to the law of universal gravitation, the gravitational force of attraction between two objects is inversely proportional to the square of the distance separating the two objects.

Hence, the law of universal gravitation obeys the inverse square law.

Answer:

The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material.

Explanation:

The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material. For example, steel is the combination of iron, which is ductile but prone to rusting in wet environments, and carbon, which offers high hardness and additional resistence to rusting in wet environments, but is fragile. Hence, steel is more resistant to rusting, ductile as iron and more resistant than iron.

1200000

80min

4800seconds

The jet aircraft travels 1,200,000 meters, for 80 minutes, and for 4800 seconds.

a. To find the distance traveled in meters, we need to convert 1200 km to meters. There are 1000 meters in one kilometer, so the distance in meters can be calculated as follows:

Distance in meters = 1200 km × 1000 m/km = 1,200,000 meters.

b. To find the total time traveled in minutes, we have to convert 1 hour and 20 minutes to minutes. Since 1 hour is equal to 60 minutes, the total time in minutes is:

Total time in minutes = 1 hour × 60 minutes/hour + 20 minutes = 80 minutes.

c. To find the total time traveled in seconds, we need to convert the total minutes to seconds. There are 60 seconds in one minute, so the total time in seconds is:

Total time in seconds = 80 minutes × 60 seconds/minute = 4800 seconds.

Therefore, the jet aircraft travels 1,200,000 meters, for 80 minutes, and for 4800 seconds.

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Answer: the dorsal cavity

Explanation:

Dorsal body cavity is the body cavity in the human body which is located posteriorly and it comprises of two type of body cavities that are cranial and the spinal. The cranial cavity is formed inside the skull and it protects the vital organ brain inside the bony protection and the spinal cavity houses the spinal cord. Thoracic cavity and pelvic cavity are the ventral cavities that means they are present in the front of the body.

Answer:

the cranial cavity

the vertebral cavity

Explanation:

i got it right

Answer:

The object with a higher mass has three times the kinetic energy of the less massive object.

We know that K.E.= 1/2 mv²

mass of first object = 1kg

speed = v

So K.E. = 1/2mv²

= 1/2 × (1) × v²

=

[tex] \: \: \: \: \: \: \: \: \: = \frac{1}{2} {v}^{2} \\ [/tex]

Now the mass of second body = 3kg

speed = v

So K.E. = 1(3)v²/2

=

[tex] \: \: \: \: \: \: \: \: \: = \: \: \frac{3}{2} {v}^{2} \\ [/tex]

now

K.E of first / KE of 2nd

[tex] \frac{1}{2} {v}^{2} \div \frac{3}{2} {v}^{2} \\ [/tex]

[tex]\frac{ \frac{ke \: of \: first \: }{ - - - - - - - - - - -} }{ \frac{ke \: of \: 2nd}{} } = \frac{ \frac{1}{ - -} }{ 3 } \\ \\ so \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \\ 3(ke \: of \: first \:) = ke \: of \: 2nd[/tex]

Answer:

F

Explanation:

The average velocity is the ratio of total displacement and time.The average speed is the ratio of total distance and time.Therefore the average speed and average velocity are equal if the total displacement is equal to the total distance that is if the body travels along a straight line without changing the direction.

Answer:

D makes the most sense to me.