An optical device that reflects light ?

An Optical Device That Reflects Light ?

Answers

Answer 1

Answer:

Mirror

Explanation:

Answer 2
an optional device that reflects light is a mirror

Related Questions

What is the limiting factor of speed for an object falling through a vacuum?

Answers

★☆〖Qบęຮτ ı¨ ø nˇ〗☆★

Air Resistance is the factor, which limits the speed of an object falling through the air...⭐

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Does California have enough water?

Answers

Answer:

As the world's largest, most productive, and most controversial water system, it manages over 40 million acre feet (49 km3) of water per year. Water and water rights are among the state's divisive political issues. Due to the lack of reliable dry season rainfall, water is limited in the most populous U.S. state.

Which of the following accurately describes how scientists use models?
A. To make science seem more complex and inaccessible
B. To take measurements of an object, process, or system as it is in
nature
C. To make direct observations of a natural object, process, or
system
D. To represent objects, processes, and systems that are too large,
too small, or too complex to study directly

Answers

Answer:

D

Explanation:

To represent objects, processes, and systems that are too large, too small, or too complex to study directly

The correct option is (d) To represent objects, processes, and systems that are too large, too small, or too complex to study directly.

Scientists employ models to comprehend phenomena they are unable to directly observe. Models aid scientists in their understanding of phenomena, no matter how big or little they may be, such as the universe or an atom. Additionally, they can aid in their understanding of systems like weather patterns.In a range of scientific disciplines, from physics and chemistry to ecology and the Earth sciences, scientific models are employed to explain and forecast the behavior of real things or systems.Models can aid in scientific prediction, understanding of processes, and communication of ideas.

The 4 types of scientific models -

Analogies diagrams, Physical replicas, Mathematical representations.Simulations on a computer.

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How do you find your target heart rate for a female

Answers

subtract your age from 220

What happens when a pebble lying on the ground is kicked?

A. Energy is completely lost.

B. Energy is created.

C. Energy is destroyed.

D. Energy is transferred.

Answers

Answer:

I'm 100% sure it's D. but if it isn't, sorry :(

D. Energy is transferred
explanation: energy is neither created nor destroyed, energy can be transferred from one object to another

Choose the correct words from the box to complete the definition of resistance.
current difficulty ease potential difference
The electrical resistance of a material is a measure of the ______________ of passing a ______________ through it.

Answers

Answer:

Opposition of passing a electric circuit

How fast is a skydiver going after 5 seconds or free fall and how far did he fall

Answers

Answer:

It's typically around 120mph. You'll reach this speed a few seconds into your jump, so for those few moments straight out the door, you'll be falling a bit more slowly and therefore covering less distance. We usually estimate around 10 seconds for the first 1,000 feet, then 5 seconds for each 1,000 feet after that.

Explanation:

When you stretch a spring, there is energy in the spring's
potential energy store. What word completes the sentence?

Answers

Answer:

field strength i think, I'm not that sure.

a wagon of mass 42 kg is pushed by a student a distance of 12.2 meters, and 297 j of work was sone on the wagon how much force did the student apply assuming that it was constant

Answers

Answer:

Force=2.484 N

Explanation:

[tex]f = \frac{w}{gh} \\ = \frac{297}{9.8 \times 12.2} \\ f = 2.484 \: n [/tex]

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A wagon of mass 42 kg is pushed by a student a distance of 12.2 meters, and 297 j of work was done on the wagon force did the student apply is 24.34 N.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

work = force*distance

force = work/distance

force = 297/12.2

force = 24.34 N

A wagon of mass 42 kg is pushed by a student a distance of 12.2 meters, and 297 j of work was done on the wagon force did the student apply is 24.34 N.

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A square brass plate has large circular hole cut in its centre. If the plate is heated, it will expand. Will the diameter of the hole expand or contract? Explain your answer.​

Answers

Mother helped her out for her birthday party

What is the mass of a large ship that has a momentum of 1.60x10^9 kg*m/s and is moving at a velocity of 10m/s?

Answers

Answer:

160000000 kg.

Explanation:

p=mv

p=1.6x10^9

v=10m/s

rearrange and substitute:

(1.6x10^9)=m(10)

m=(1.6x10^9)/10

m= 1.6x10^8 kg.


Please help


What differentiates one layer of the atmosphere from one another?



Please help

Answers

Answer: The stratosphere and the troposphere are defined by the variation in temperature with height. Within a troposphere, the temperature drops as altitude increases, and drops fast enough for convection to occur. Whereas within a stratosphere, the temperature rises with increasing altitude. Features of the atmosphere change with altitude: density decreases, air pressure decreases, temperature changes vary. Different temperature gradients create different layers within the atmosphere. The lowest layer is the troposphere where most of the atmospheric gases and all of the planet's weather are located.

Explanation:

Which type of waves are able to travel through various types of media and space
a) body
b) electromagnetic
c) parabolic

Answers

Answer:

B

Explanation:

......................

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DUE TONIGHT, JUST NEED TO CONFIRM ANSWER
3. An object moves in uniform circular motion with a centripetal force of 4.5 N. Which of the following is true?

(A) The object’s velocity vector is constant in magnitude and direction.

(B) The object’s acceleration vector is constant in magnitude and direction.

(C) Both the object’s velocity and acceleration vectors change both their magnitudes and directions.

(D) Both the object’s velocity and acceleration vectors have constant magnitudes but change directions.

Answers

Answer:

the answer is D I THINK

Explanation:

A drone flies upward with a velocity of 5m/s and has a kinetic energy of 90J What is the mass of the drone?
O 5.4 kg
1.9 kg
7.2 kg
3.6 kg

Answers

Answer:

m = 7.2 kg

Explanation:

Given that,

The velocity of the drone, v = 5 m/s

The kinetic energy of the drone, E = 90 J

We need to find the mass of the drone. The formula for the kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2\\\\m=\dfrac{2K}{v^2}\\\\m=\dfrac{2\times 90}{(5)^2}\\\\m=7.2\ kg[/tex]

So, the mass of the drone is 7.2 kg.

How many seconds will it take for a the International Space Station to travel 450 km at a rate of 100 m/s?

Answers

Time = (distance) / (speed)

Time = (450 km) / (100 m/s)

Time = (450,000 m) / (100 m/s)

Time = 4500 seconds (that's 75 minutes)

Note:

This is about HALF the speed of the passenger jet you fly in when you go to visit Grandma for Christmas.

If the International Space Station flew at this speed, it would immediately go ker-PLUNK into the ocean.

The speed of the International Space Station in its orbit is more like 3,100 m/s, not 100 m/s.

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Nuclear reactions occur when the nuclei of two different atoms collide to produce products that are different from the starting substances. How is this similar to a chemical change?

a. a chemical change can easily be reversed.
b. in a chemical change, mass can be created
c. in a chemical change, energy can be created
d. in a chemical change, a new substance forms​

Answers

Nuclear reactions are independent of the chemical form of the element.

Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei.

D.

Explain the difference between velocity and acceleration.​

Answers

Answer:

velocity has direction and acceleration doesn't

Acceleration is increasing or decreasing speed or changing direction, whereas velocity is how much distance you cover in a given amount of time.

14
A measure of the gravitational force exerted on an object?

A Weight
B) Force
C)Air resistance

Answers

Answer:

C

Explanation:

Answer:

A) weight

Explanation:

Hope it helps :))

A 1400-kg car is moving at a speed of 35 m/s. How much kinetic energy does the car have (in Joules)?

Answers

Answer:

857.5Kjoules

Explanation:

Using K. E=1/2 Mv^2

=1/2x1400x35x35

=857500joules

=857.5KJ

how are electromagnetic waves produced

Answers

Answer:

Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation. Since the electric and magnetic fields in most electromagnetic waves are perpendicular to the direction in which the wave moves, it is ordinarily a transverse wave.

Answer: Electromagnetic waves are the combination of electric and magnetic field waves produced by moving charges.

The creation of all electromagnetic waves begins with a charged particle. This charged particle creates an electric field (which can exert a force on other nearby charged particles). When it accelerates as part of an oscillatory motion, the charged particle creates ripples, or oscillations, in its electric field, and also produces a magnetic field (as predicted by Maxwell’s equations).

Once in motion, the electric and magnetic fields created by a charged particle are self-perpetuating—time-dependent changes in one field (electric or magnetic) produce the other. Both electric and magnetic fields in an electromagnetic wave will fluctuate in time, one causing the other to change.

Electromagnetic waves (photons) are produced anytime a charged particle experiences a change in velocity.. The electromagnetic wave (radiation) that is produced when the charge particle changes it’s velocity is how energy is conserved. This energy is light.

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Explanation:

a stone is dropped from the top of a tower 400 m high and at the same time another stone is projected upward vertically from the ground with a velocity of 100 m/s. find where and when the two stones will meet.

Answers

Answer:The stones will be at the same height of 62.59 feets 4.4 seconds later.

Explanation:

newtons = mass x _______
a) capacitance
b) inductance
c) gravitational field strength

Answers

Answer:

c) gravitational field strength

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Tom puts a metallic cover over his car's windshield after parking. How does this control
the sun's rays during a sunny day?

Answers

The metallic cover deflects the suns rays

A 500g glass statue is accidentally knocked from a shelf 1.5m high. If 3% of the gravitational potential energy is converted into heat, how much does the statue’s temperature rise

Answers

Answer:

0.0001158443168226212 Celcius (significant digits? who cares.....) or about 0.00021 Fahrenheit

Explanation:

500g=0.5kg

PE=mgh

PE=(0.5)*(9.81)*(1.5)

PE=7.36J

3% of 7.36 is 0.22J is converted to heat

From there, it's tricky.

I just used a joules to celcius converter to get 0.0001158443168226212 degrees celcius or 0.00021 degrees fahrenheit rise in temp.

Height of tallest wave possible

Answers

An earthquake followed by a landslide in 1958 in Alaska's Lituya Bay generated a wave 100 feet high, the tallest tsunami ever documented. When the wave ran ashore, it snapped trees 1,700 feet upslope. Five deaths were recorded, but property damage was minimal because there were few cities or towns nearby.

Wave A has a frequency of 1.6 Hz, and Wave B has a frequency of 3.2 Hz. If Wave A has a wavelength of 1.0m, what do you expect will be the wavelength of Wave B?
OPTIONS:
A) 2.0m
B) 1.0m
C) 0.50m
D) 0.25m

Answers

Answer:

C

Explanation:

A- velocity=wavelength*frequency

velocity=1.0*1.6.......=1.6 m/s

B- wavelength=velocity/frequency

wavelength=1.6/3.2.....=0.5 meters

A 12 kg object is moving at 10 m/s to the right. It collides with a 20 kg object moving at 7
m/s to the right. What speed will the objects move together after they collide and stick
together?*

a) 5.27 m/s
b) 08.13 m/s
c) 3 m/s
d) 17.23 m/s

Answers

Answer:

Change in velocity

−2−10=−12

Time required is 4 seconds

a=Δv/t

=−12/4

=−3m/s²

Hence,

option C is correct answer.

The process of sediments being compacted and cemented to form sedimentary rocks is called

Answers

Answer:

Lithification is the answer.

Use Gauss's Law to find the electric field produced by an infinite plane of uniformly distributed charge Q, with charge density σ. Draw the appropriate Gaussian Surface

Answers

Answer:

Explanation:

Consider an endless sheet of uniform charge thickness per unit area [tex]\sigma[/tex]  

For a boundless sheet of charge, the electric field will be opposite to the surface. In this way, just the closures of a round and hollow Gaussian surface will add to the electric transition. For this situation, around and hollow Gaussian surface opposite to the charge sheet is utilized. The subsequent field is a large portion of that of a conductor at harmony with this surface charge thickness.  

By balance, we expect the electric field on one or the other side of a plane to be an element of x just to be guided typical to the plane and to point away from/towards the plane contingent upon whether, [tex]\sigma[/tex] is positive/negative.

According to the law;

[tex]2EA = \dfrac{q_{enc}}{\varepsilon_o}[/tex]

[tex]where; \ q_{enc} = total \ enclosed charge = \sigma A \\ \\ thus; \\ \\ 2EA = \dfrac{\sigma A}{\varepsilon_o} \\ \\ E = \dfrac{\sigma}{2 \varepsilon _o}[/tex]

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