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An object appears white because it reflects all wavelengths of visible light . Option A is correct.

Ultraviolet rays are a kind of electromagnetic radiation that extends from the visible light spectrum to the X-ray area.

A white item reflects white light in all hues equally. We see the hue that an item does not absorb if it absorbs all except one. Red, orange, green, blue, indigo, and violet light are absorbed by the yellow strip in the diagram.

Harmful rays have a long-term effect on humans, causing skin and eye problems. It is also a source of vitamin C.

An object appears white because it reflects all wavelengths of visible light .

Hence, the correct answer for the blanks is reflects all wavelengths of visible light .

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Answer:

The Refractive Index (RI) is defined as the ratio of the speed of light in a vacuum to its speed in the sample medium.

Formula:-

[tex]n = \displaystyle{ \frac{c}{v} }[/tex]

Where,

c is the speed of light and v is the phase velocity of light.

Answer:

Free body diagrams are used to describe situations where several forces act on an object. On the other hand Vector diagrams are used to resolve (break down) a single force into two forces acting as right angles to eachother

Explanation:

Hope this helps !

The relationships between momentum, mass, and velocity is that the product of mass and velocity gives the momentum of that object ( kg.m/s ).

P = mv.

Momentum is simply the product of the mass of an object and its velocity.

Its is expressed as;

P = m × v

Where m is the mass of the object and v is its velocity.

The relationships between momentum, mass, and velocity is that the product of mass and velocity gives the momentum of that object ( kg.m/s ).

P = mv

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Answer:(C)

Explanation:

because is 13 trust me I got it right

Answer:

.6 A

Explanation:

Battery 15 VOLTS

V = IR

V / R = I

15 / ( 5+20) = .6 amps

Answer:

canola oil biome is a chemically refined oil that is used for cooking and skin

Explanation:

Answer:

c

Explanation:

Out of the given options, shovel, pushup, and seesaw are all examples of levers. Hence, the one that is not an example is :

Answer:

Yes

Explanation:

I love THAT SONG. And it is a good essay.

Answer: ( yes i do like your essay! )

I am breaking down in tears. /j

I should've expected this and i still fell for it  

Answer:

A reference frame is that frame to which the qualities of an object are related:

For instance - an object may described by - mass, speed, acceleration, size,  etc,

It is important to remember that Newton's Laws of motion do not hold in accelerated reference frames -

Einstein's laws of special relativity are only true in frames that move with contant speed to one another

The corporate form of organization has a disadvantage of government regulations, which is due to the complicated rules. The correct option is b.

The  major characteristics of a corporate form of organization are limited liability, shareholder ownership, double taxation, continuing lifespan and professional management.

Among the options, the disadvantage is government regulations.

Thus, the correct option is b.

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Archaeologists use radioactive decay of an isotope of the element carbon. Because it has a fairly short half-life, and is found in anything that was once living.

The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.

Archaeologists use radioactive decay of an isotope of the element carbon. Because it has a fairly short half-life, and is found in anything that was once living.

Hence, carbon is used the correct answer for the blank.

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Answer:

Answer is carbon

Explanation:

EDGE2023

The total magnetic field of the alpha particle will be = 1.974 x 10⁻⁴ T .

Magnetic field is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.

Magnetic field due to moving charge =

[tex]B=\dfrac{\mu_oq}{4\pi}\times \dfrac{v}{r^2}[/tex]

q is charge moving with velocity v and r is distance from point at which field is calculated .

For alpha particle

[tex]B_1=\dfrac{\mu_o}{4\pi}\times \dfrac{2\times 1.6\times 10^{-19]\times 2.8\times 10^{5}}}{(8.25\times 10^{-9})^2}}[/tex]

= 0.1316 x 10⁻³ T

For electron

[tex]B_2=\dfrac{\mu_o}{4\pi}\times \dfrac{1.6\times 10^{-19}\times 2.8\times 10^{5}}{(8.25\times 10^{-9})^2}[/tex]

= .0658 x 10⁻³ T .

Both these magnetic field will be same in direction because direction of equivalent current is same for both the particles .

Hence

Total magnetic field

= B₁ + B₂ = .1974 x 10⁻³

= 1.974 x 10⁻⁴ T .

Hence the total magnetic field of the alpha particle will be = 1.974 x 10⁻⁴ T .

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If the crate is moving at a constant speed, then there is zero net force on the crate, and hence no work is required.

More specifically, by Newton's second law the net horizontal force on the crate is

F - 180 N = 0

where F is the magnitude of the applied force. The right side is zero since constant speed = no acceleration. Then F = 180 N.

Now,

• work done by F = (180 N) (6 m) = 1080 J

• work done by friction = (-180 N) (6 m) = -1080 J

so the total work W is

W = 1080 J - 1080 J = 0 J

Alternatively, by the work-energy theorem, the total work done on the crate is equal to the change in its kinetic energy. But constant speed means initial and final velocities are equal; if v is this speed, then

W = 1/2 (90 kg) v² - 1/2 (90 kg) v² = 0 J

It has been proposed that the total number of civilizations that have arisen in our galaxy would be closest to 100,000.

A galaxy is a group of stars (solar systems), gas, and dust in a specific position in the Universe.

The Milky Way is the galaxy where we live and it has been proposed that this galaxy is full of dead civilizations.

In conclusion, the total number of civilizations that have arisen in our galaxy would be closest to 100,000.

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Answer:

effort effort effort effort effort effort

The basic unit of the measure of the rate of current flow in a conductor is ampere.

Option B) ampere is the correct answer.

Current is simply the rate of flow of charged particles such as electrons caused by:

An ampere is simply a unit of measure of the rate of current flowing through a conductor.

Ampere is the SI basic unit of electric current

Therefore, the basic unit of the measure of the rate of current flow in a conductor is ampere.

Option B) ampere is the correct answer.

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Answer:

B) ampere

Explanation:

Answer:

Cracking of an egg is a physical change since the egg and the stuff inside does not change but the shape or appearance of the shell changes.

Explanation:

Hope it helps

Hope you understand

Have a nice day

Answer: Acceleration is 0.25m/s^2

Explanation:

Answer:

60Nm

Explanation:

Work done = F * S = 12*10*0.5 = 60Nm

Answer:

0.09

Explanation:

I took the test and the correct answer is actually

-0.09

Answer:

Hello, I'm here to help you.

↬ 78%

Explanation:

↬ Think that about 70% of the area of the earth is covered by the ocean.

↬ So the precipitation that falls on it is a smiliar percentage.

Answer:

Area is two dimensional   like   cm^2     volume is 3 dimensional  like cm^3

Explanation:

Answer:

an area is a two dimensional whereas a volume is a three dimensional

Explanation:

An area is a plain figure while a volume is a solid figure.The area is measured in square units and the volume in cubic units.The area covers the outer space and the volume the inner capacity

Answer:

30 J

Explanation:

You have to transform g in kg, so 600 g=0,6 kg

the kinetic energy value is

K= ½ mv² so it is K=½ (0.6×100)=30 J

[tex]\text{Kinetic energy,}\\\\~~~~~~E_k = \dfrac 12 mv^2\\\\~~~~~~~~~~=\dfrac 12 \times 6\times 10^{-1} \times 10^2~~~~~~~;[m = 600 g = 600 \times 10^{-3}~ \text{kg} = 6\times 10^{-1}~ \text{kg}]\\\\~~~~~~~~~~=\dfrac{60}2\\\\~~~~~~~~~~= 30~ J[/tex]

The Earth is rotating with the rotational speed. The linear speed of the earth's rotation at the North Pole is zero.

The linear speed is when a particle is assumed to be moving in a straight line. The rate of change of distance with time is called linear speed.

The linear speed at the North Pole is

v = distance /  time

At the North Pole, the distance around the Earth is zero. The rotation for 224 hrs.

v = 0 / 24 hrs

v =0 mph

Therefore, the linear speed of the earth's rotation at the North Pole is zero.

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Answer:

107.4 meters

Explanation:

gravity is 9.8m/s^2

max height = (velocity squared times sin squared angle) ÷ ( speed of gravity times 2 )

max height = (48 squared times sin of 73 squared) ÷ ( 9.8 times 2 )

A. It has equal numbers of each type of atom in its reactants and products.

a balanced chemical equation = number of elements on both side are equal

It is true that the incident angle is the angle formed between the barrier and the direction of wave propagation.

Wave propagation refer to the processes and different ways waves travels from one medium to another and transferring energy.

Therefore, is true that the incident angle is the angle formed between the barrier and the direction of wave propagation.

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Answer:Mercury spins slowly on its axis and completes one rotation every 59 Earth days. But when Mercury is moving fastest in its elliptical orbit around the Sun (and it is closest to the Sun), each rotation is not accompanied by sunrise and sunset like it is on most other planets.

Explanation: