A single beam of light is shone into a glass containing milky water.
Which statement best describes why the beam of light bends downward?
The milk blocks the passage of light through the water.
The light is moving from air into another medium.
O The force of gravity affects light more when it is in a liquid.
O The farther light is from its source, the slower it moves.

Answer:

from the cup to the hand

Explanation:

Conduction is the heat transfer due to contact between object. During conduction, heat energy is transferred by contact from a body with higher temperature (hotter body) to a body with lower temperature (cooler body).

When a person with body temperature of 36°C comes in contact with a cup of coffee with temperature of 90°C, heat is transferred from the cup to the hand because the cup is hotter.

Answer:

a) 1.875 volts

b) 5.86 W

Explanation:

Given data:

transmission line resistance = 0.30/cable

power of the generator = 250 kW

if Vt = 80 kV

a) Determine the decrease V along the transmission line

Rms current in cable = P / Vt = 250 / 80 = 3.125 amps

hence the rms voltage drop ( Δrmsvoltage )

Δrmsvoltage = Irms* R  = 3.125 * 2 * 0.30 = 1.875 volts

b) Determine the rate Pd at which energy is dissipated in line as thermal energy

Pd = [tex]I^2rms*R[/tex]

    =  3.125^2 * 2* 0.30  = 5.86 W

Answer:

700N

Explanation:

W=m×g

W=70kg×10N/m

W=700N

Answer:

hi

Explanation:

The element which is always found in bioclastic sedimentary rocks is carbon.

They are the types of rocks which are formed as a result of accumulation of minerals or organic particles at the surface of the earth.Sedimentation is the name given to a collective process which cause the particles to settle.

The study of sedimentary rocks is useful in civil engineering and as important sources of coal, fossil fuels and ores.The color of sedimentary rock is often determined by iron content and sometimes due to the presence of organic matter.

They are classified based on origin in to 4 types which are clastic, biochemical ,chemical and other sedimentary rocks.While based on composition they are classified as siliciclastic,carbonate ,evaporite,organic rich,siliceous ,iron-rich and phosphatic sedimentary rocks.

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Answer:

The answer is drag.

Explanation:

Hope this helped Mark BRAINLEST!!!!!

Answer: D. Drag

Explanation:

Drag friction exists between solid objects moving in the water.

Answer:

the answer is a) chunks of ice that begin to vaporized if they pass close to the sun

Answer: The fork feels colder when you touch it because Steel conducts thermal energy better than plastic. The correct statement is 1

Explanation:

The ability of a material to transfer heat energy in an environment is known as thermal conductivity. It feels cooler to touch a steel spoon than a plastic spoon found in the same temperature because steel which is a type of metal is a highly efficient thermal conductor than spoon which is a plastic.

Metals can be defined as those substances which forms positive ion in a chemical reaction by lossing it's electrons. It has the following properties:

--> it is solid at room temperature

--> it has high melting point

--> it has high boiling point and

--> it is malleable.

Metals are said to be good thermal conductor because they contain free flowing conduction electrons. Therefore, when you touch a steel spoon and plastic spoon, it feels cooler because the steel metal is able to conduct heat away from your hand faster than the plastic which is a poor conductor of heat.

Answer:

1. Steel conducts thermal energy better than plastic.

Explanation:

Both objects are at the same temperature, and when you touch them, you feel the steel to be colder.

This happens because steel is a better thermal conductor, then when you touch it, it "steals" more thermal energy from you than the plastic.

As the amount of thermal energy transmitted is greater for the steel, you will feel it to be colder.

Then the correct option is the first one, steel conducts thermal energy better than plastic.

Answer:

Here

Explanation:

They don't have free electrons moving around (delocalised electrons) so they can't conduct heat and electricity which gives them a property of good insulators. The insulators stop us having an electric shock because they don't conduct electricity as we use them to insulate metal wires and other metallic things. can i have brainliest now pls!

Answer:

Well, 365 days is about how long it takes for Earth to orbit all the way around the Sun one time.

Answer:

(a) Waves P and Q have the same  wavelength but wave P has twice the  amplitude of wave Q.

(b) Waves Q and R have the same amplitude  but wave R has twice the wavelength  of wave Q.

(c) Wave  T shows a steady frequency but changing amplitude.

(d) Wave  S shows steady amplitude but a changing frequency.

e) Waves  Q and R have a low amplitude and a steady  frequency.

Answer:

Change in heat energy = -30 J

Explanation:

Given:

AU = Q-W

Heat energy Q = 20 J

Work done W = 50 J

Find:

Change in heat energy

Computation:

Change in heat energy = 20 J - 50 J

Change in heat energy = -30 J

Answer:

it's a

Explanation:

hope this helps!!!!!!

Answer: The object moves with constant velocity

Explanation:

In this velocity vs time graph we're dealing with Ap physics or regents physics. If we look at the slope we can see it is constant or not changing. Even so lets check the other answers and prove them wrong

The objects speed increases: This is wrong because the line shows a steady 5m/s with no change

The object is in free fall: If the object was in freefall the speed would be increasing as a result of acceleration due to gravity

The object moves with a constant speed: This seems to be the case since the slope or line doesn't change at all

The object stays at rest: Can't be right because the object is at a speed of 5m/s so we know its moving at least

The objects speed decreases: Again the line isn't going up or down so we can't say speed increases or decreases

Answer:

B: It would be released back into the atmosphere.

Explanation:

Mass is an intrinsic property of the rock.  The mass doesn't care where it is, and it makes no difference where the rock happens to be at the moment ... its mass doesn't change.

17kg of mass is 17kg .  If it's 17kg on the moon, it's 17kg on Earth.

Answer:

0.52 N

Explanation:

k = 13 N/m

x = 0.04 m

Plug those values into Hooke's Law:

F = kx

F = (13 N/m)(0.04 m)

F = 0.52 N

The magnitude of spring force acting on the ball when the spring is released is 0.52 N.

When a spring is extended or compressed, it produces a restoring force known as the spring force. Its displacement from its relaxed length is proportional to and in the opposite direction of it.

Here,

Displacement of the spring, x = 4 cm = 4 x 10⁻² m

Spring constant of the spring, k = 13 N/m

The spring is moved from its equilibrium position when it is compressed by the pinball machine. As a result, it encounters a restoring force that usually causes the spring to restore back to its initial position.

The expression for the restoring spring force is given by,

F = -kx

the negative sign implies that the force is restoring and is acting opposite to the direction of displacement.

F = kx

F = 13 × 4 x 10⁻²

F = 0.52 N

Hence,

The magnitude of spring force acting on the ball when the spring is released is 0.52 N.

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Answer: it’s c

Explanation:I put that as my answer for an assignment and got it right

The correct option is the speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

Given that in the question there is a child who is doing experiment for an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table given in question we see that speed increases as cart goes down.

The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

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Answer:

height affects the acceleration, which means it could go faster at the end of the slope since it got more distance to travel. acceleration could affect the speed of the roller coaster because it will go faster as it approaches the end of the slope and speed can affect the height it reaches because the faster it goes, the more distance it can travel before reaching to a stop.

Explanation:

Coal, and oil are fossil fuels they are non - renewable. Nuclear sources are alo non renewable energy since they are unstable and hazardous to the environment and thus are difficult to manage for an efficient energy generation.

Renewable energy sources are those which can reproduced and will be long lasting over time. Whereas non renewable resources like fossil fuels  and nuclear sources are not at all recycled. Moreover they causes harmful effects to the environment.

Waste from coal or natural gas production necessitates the use of surplus energy and environmental mitigation. Considering these variables, it is evident that coal's overall usable energy efficiency is just 29% of its initial energy value.

Solar energy is the better alternative as a renewable energy source.Wind, on the other hand, rates at 50% efficiency. Wind energy sometimes has a higher efficiency than this %. And using wind energy doesn't produce any pollution as solar energy.

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Answer:

Perfectly elastic collisions can happen only with subatomic particles. Everyday observable examples of perfectly elastic collisions don't exist—some kinetic energy is always lost, as it is converted into heat transfer due to friction.

Answer:

Height, h = 0.51m

Explanation:

Given the following data;

Mass = 10kg

Gravitational potential energy = 50 Joules

To find the change in height;

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

Gpe = mgh

Where,

Gpe represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Substituting into the formula, we have;

50 = 10*9.8*h

50 = 98h

h = 50/98

h = 0.51m

Answer:

Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.

Explanation:

Un chaleco antibalas soporta el disparo de una bala disipando la energía de esta última a través de su propio material. Si sabemos que el chaleco antibalas soporta 120 joules de energía, cabe saber si la energía cinética traslacional es igual o inferior a ese límite, significando que la bala no atravesaría el chaleco.

La energía cinética traslacional de la bala ([tex]K[/tex]), in joules, queda expresada con la siguiente fórmula:

[tex]K = \frac{1}{2}\cdot m\cdot v^{2}[/tex] (1)

Donde:

[tex]m[/tex] - Masa de la bala, en kilogramos.

[tex]v[/tex] - Rapidez de la bala, en metros por segundo.

Si sabemos que [tex]m = 0.122\,kg[/tex] y [tex]v = 350\,\frac{m}{s}[/tex], entonces la energía cinética traslacional de la bala es:

[tex]K = 7472.5\,J[/tex]

Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.

Answer:

sound travels through steel about 15 times faster than through air.

Explanation:

The power of an electrical appliance tells us how much electrical energy it transfers in a second. Power, P is measured in watts (W) where:

1 W = 1 J/s (joule/second).

Power is the rate of transfer of energy between energy stores.

One watt (W) is equal to one joule per second (J/s).

Energy transferred-

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Answer:

False

Explanation:

Potential energy is stored energy, so it is not in motion. Kinetic energy is the energy in motion.