The wavelengths for visible light rays correspond to which of these options?
A.
about the size of a pen
B.
about the size of a virus or a large molecule
C.
about the size of an amoeba
D.
smaller than an atom
E.
about the size of a football field

Answer:

its a top question

I think L represents ✌️

1) L

Explanation:

During the solid form are atoms close to eachother and can't move around too much. A gas can fill up a container while a liquid just takes the form of a container.

Answer:

A

Explanation:

This is to do with convection currents :)

Hope this helps!

Answer:When charged particles from the sun strike atoms in Earth's atmosphere, they cause electrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora, or northern lights.

Explanation:

Answer:

Increase air resistance

Explanation:

Gravity forces the parachute down but air resistance pushing up on the flat surface of the parachute causes it to fall slower to the ground.

Answer:

t = 4.28 s

Explanation:

The horizontal speed of a marble = 7 m/s

The horizontal displacement covered by the marble = 30 m

We need to find the time for which the marble is in air. Let the time is t. Using the formula for speed to find it as follows :

[tex]s=\dfrac{d}{t}\\\\t=\dfrac{d}{s}\\\\t=\dfrac{30\ m}{7\ m/s}\\\\=4.28\ s[/tex]

So, it will in the air for 4.28 s.

Answer:

It is difficult to magnetize.

Answer:

I believe  that the crab would have 14 arms if the octopus had 12 arms

Explanation:

Answer:

Force can change the speed and direction of an object.

Explanation:

Answer:

Explanation:

It would actually be A. 30 , as each hour of ascension (i am not sure about the correct terminology) equals 15 .

Answer:

30

Explanation:

Answer: it  is proposes that in Earth's prebiotic history, simple organic matter was exposed to energy in the form of volcanoes and electrical storms

Explanation:

Answer:

490J

Explanation:

Given parameters:

Mass of box  = 10kg

Height  = 5m

Unknown:

Work done  = ?

Solution:

Work done can be derived from the product of force and distance;

   Work done = force x distance

 Force here is applied by gravity and it is the weight

 The distance is the height

  Work done  = weight x height

 Work done  = mass x acceleration due to gravity x height

 Work done  = 10 x 9.8 x 5  = 490J

Answer:

When a branch of a tree is shaken, some of the fruits may fall down. Why? Solution : The fruits fall down due to inertia of rest.

Answer:

I HOPE IT WILL HELP YOU A LOT....

Answer:

In order to walk across the floor, you push backwards on the floor with your foot. Newton's Third Law says that the reaction force to this action force is "floor pushes you forward" (Action: You push floor (backwards). Reaction: floor pushes you (forward).) So, when you walk, it is the floor that pushes you along!

Explanation:

.

Answer:

heat?

Explanation:

Answer:

The law of reflection states that the angle of reflection equals the angle of incidence—θr = θi. The angles are measured relative to the perpendicular to the surface at the point where the ray strikes the surface.

Explanation:

Answer:

200 seconds

Explanation:

1,800 divided by 90 = 200

Answer:

The Gravity gets stronger

Explanation:

Newtons laws of motion.

Answer:

1. car hitting a barrier 2. velosity of the washer 3. force applied to the car 4. acceleration of the car.

Explanation: edge 2020

why because nice

Answer:

1: car hitting a barrier

2: velocity of the washer

3: force applied to the car

4: acceleration of the car

Explanation:

Answer:

First, remember that:

Acceleration = dV/dt

where V is velocity and t is time.

When you launch a projectile (θ between 0° and 90° means that you are not launching it into the ground) you are applying an initial velocity v0, that can be separated in components, where the vertical component will be:

v0*sin(v)

That initial vertical velocity is a constant, so it does not depend on time.

Then when we differentiate with respect to the time, that constant will vanish, and we will get:

rate of change of the vertical velocity = vertical acceleration.

And as you know, when we ignore the air resistance the only force acting on the vertical axis is the gravitational force, such that the vertical acceleration will be:

a(t) = -9.8m/s^2

Where the negative sign is because this force points down.

Then the rate of change of the vertical velocity will be exactly that, -9.8m/s^2.

And the vertical velocity equation, to see exactly how the vertical velocity depends on time, will be:

V(t) = (-9.8m/s^2)*t + v0*sin(θ)

Answer:

Sulfur is a COMBUSTIBLE SOLID. ... Molten Sulfur reacts with HYDROCARBONS to form toxic and flammable gases such as Carbon Disulfide and Hydrogen Sulfide).

Explanation:

Answer:

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

Explanation:

Potential and Kinetic Energy

The gravitational potential energy is the energy an object has due to its height above the ground. The formula is

[tex]U=mgh[/tex]

Where:

m = mass of the object

g = acceleration of gravity (9.8~m/s^2)

h = height

Note we can also use the object's weight W=mg into the formula:

[tex]U=Wh[/tex]

The kinetic energy is the energy an object has due to its speed:

[tex]\displaystyle K=\frac{1}{2}mv^2[/tex]

Where v is the object's speed.

Initially, the object has no kinetic energy because it's assumed at rest.

The W=30 N rock falls from a height of h=40 m, thus:

[tex]U=30*40=1,200 J[/tex]

Since the sum of the kinetic and potential energies is constant:

U' + K' = 1,200 J

Here, U' and K' are the energies at any point of the motion. Since both must be the same:

U' = K' = 600 J

U'=Wh'=600

Solving for h':

[tex]\displaystyle h'=\frac{600}{W}=\frac{600}{30}=20~m[/tex]

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

Answer:

D. Weight is an object's mass multiplied by the amount of

gravitational force acting on that object.

Explanation:

I got it right on the test

Weight is an object's mass multiplied by the amount of gravitational acceleration acting on that object. Hence, option (D) is correct.

The most fundamental characteristic of matter is its mass, which is one of the fundamental physical quantities. Mass is a term used to describe how much matter is there in a body. The kilograms is the SI unit of mass.

The amount of a body's weight indicates how much gravity is pulling on it. The weight formula is as follows: w = mg Since weight is a force, it has the same SI unit as a force, which is the Newton.

When we look at how weight is expressed, we can see that it depends on both mass and the acceleration caused by gravity. Hence, weight is an object's mass multiplied by the amount of gravitational acceleration acting on that object.

Learn more about weight here:

https://brainly.com/question/10069252

#SPJ6

Answer:

Glucose

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Answer:

20

Explanation:

force=work done÷distance

Answer:

mass energy

Explanation:

because of the kinetic energy

Answer:

1×10^-9kilogram

100 decameter =100000cm

Answer:

1 microgram into kilogram

1000000000microgram=1kilogram

1 microgram:1/1000000000kilogram

and

100 decameter into cm

1decameter:1000cm

100 decameter :100000

Answer:

3.6

Explanation:

plz mark brainliest | (• ◡•)|

Answer:

there is an infinite number of images because it is reflected off of the mirrors. the images in the mirror will "move" if either mirror is shifted because the angle of reflection. the images are the same because its just a repeated reflection. i see the object on both sides, repeated as far as i can see in both mirrors.

Explanation: