Think of an example of a chemical change that some people might think is NOT a chemical change. Explain why it is.​

Answer:

The force of gravity = 40 N

Explanation:

Given that,

The mass of a ball, m = 10 kg

The acceleration due to gravity on the surface of Mars, a = 4 m/s²

We need to find the force of gravity of the ball on Mars. The force of gravity on an object is given by :

F = mg

Substitute all the values,

F = 10 kg × 4 m/s²

F = 40 N

Hence, the correct option is (B).

Answer:

I think it is 5.6. This is my answer

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Elements are one type of atom.

Elements are complete chemical substances which relate to a single entry in the modern periodic table. Elements consist of one kind of atoms only.

Answer:

h = 2.5 m

Explanation:

Given that,

Mass of a ball, m = 1.5 kg

Initial velocity of the ball, u = 7 m/s

We need to find the maximum height reached by the ball. Let it is be h. Using the conservation of energy to find it such that,

[tex]mgh=\dfrac{1}{2}mu^2\\\\h=\dfrac{u^2}{2g}[/tex]

Put all the values,

[tex]h=\dfrac{7^2}{2\times 9.8}\\\\=2.5\ m[/tex]

So, it will reach to a height of 2.5 m.

Answer:

Undersea mountain ranges are mountain ranges that are mostly or entirely underwater, and specifically under the surface of an ocean. If originated from current tectonic forces, they are often referred to as a mid-ocean ridge. In contrast, if formed by past above-water volcanism, they are known as a seamount chain.

Explanation:

Answer:

depends the ancient humans or the start of the solar system

Explanation:

if its the humans the earth was in the middle of everything.

but the beginning of the solar system lets say when earth just formed the orbits where unstable and planet ending impacts happed a lot.

ill do the proto planetary disc too

the disc formed the gas giants first then the rockey  planets formed out of the disc  

Answer:

Electric potential = 0.00054 V

Explanation:

We are given;

Charge; q = 3 pC = 3 × 10^(-12) C

Radius; r = 2 cm = 0.02 m

Formula for the electric potential of this surface will be;

V = kqr

Where;

K is a constant = 9 × 10^(9) N⋅m²/C².

Thus;

V = 9 × 10^(9) × 3 × 10^(-12) × 0.02

V = 0.00054 V

Answer:

primary voltage/secondary voltage = number of turns on primary coil/number of turns on secondary coil

V1/V2= N1/N2

1.5/5 = 150/N2

0.3 = 150/N2

N2= 150/0.3

N2 = 500

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Answer:

K = 9000 J

Explanation:

Given that,

The mass of a boat, m = 2000 kg

The velocity of the boat, v = 3 m/s

We need to find the kinetic energy of the boat. We know that the kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2\\\\K=\dfrac{1}{2}\times 2000\times 3^2\\\\K=9000\ J[/tex]

So, the required kinetic energy is equal to 9000 J.

Answer:

if one bulb burns out the other bulbs will also turn off because they are connected to each other.

Answer:

a. 25.59 μN b. The magnetic force is directed to the left.

Explanation:

a. The magnitude of the magnetic force

The magnetic force, F on the charge is

F = BqvsinФ where B = magnetic field strength = 1.05 T, q = charge = 6.50 × 10⁻⁶ C and v = speed of charge = 3.75 m/s and Ф = angle between B and v = 90° (since the charge is moving into the page and the magnetic field is directed vertically upwards and they are thus perpendicular to each other)  

So, substituting the values of the variables into the equation, we have

F = BqvsinФ

F = 1.05 T × 6.50 × 10⁻⁶ C × 3.75 m/s × sin90°

F = 25.59 × 10⁻⁶ N

F = 25.59 μN

b. The direction of the magnetic force on the particle

Using Fleming's right-hand rule, the first finger represents the magnetic field and the second finger the direction of the charge(or its velocity), then the thumb represents the direction of the magnetic force on the charge. Since the magnetic field is directed vertically upwards and the particle is directed into the page, the magnetic force which is represented by the thumb is directed to the left.

So, the magnetic force is directed to the left.

I think the answer is c because the image is shown on the same side as the object

The Diagram that involves a virtual image is the third diagram  ( C )

The third diagram involves a virtual image because it has its Image on the same side as the object as seen from the description :

The convex lens is centered at 7cm and the object is located at 6cm while the Focal points are 5.5 and 8.5 cm  

and the Image is formed at 4 cm ( on the same side/ half  of the Ruler ).

For a real image to be formed the Image will appear behind the position of the convex lens as seen in the diagram attached below and in Diagrams A and B .

Hence Diagram C shows that the Image is a virtual image

Learn more of convex lens : https://brainly.com/question/12323990

Answer:

v = 8.0 m/s

Explanation:

The diagram clearly shows that the string is vibrating in the 5th harmonic. Hence, the length of string in terms o wavelength can be given as:

[tex]L = \frac{5}{2}\lambda\\\\\lambda = \frac{2}{5} L[/tex]

where,

λ = wavelength = ?

L = Length of string = 1 m

Therefore,

[tex]\lambda = \frac{2}{5}(1\ m)\\\\\lambda = 0.4\ m[/tex]

Now, the speed of the wave can be given by the following formula:

[tex]v = f\lambda\\[/tex]

where,

v = speed of wave =?

f = frequency of wave = 20 Hz

Therefore,

[tex]v = (20\ Hz)(0.4\ m)\\v = 8\ m/s\\[/tex]

Hence, the correct answer is:

v = 8.0 m/s

Answer:

B because the earth rotational axis tilt away from the sun.

solute + solvent = a solution

I found a really good image for this situation:

Explanation:

In order from highest to lowest energies the parts of electromagnetic spectrum are named as

Gamma rays,

X-rays,

ultraviolet radiation,

visible light,

infrared radiation,

and radio waves.

Microwaves are a subsections of radio waves. They are used in microwave ovens to heat the food items.

This is expected EM spectrum in field of science.

Complete question is;

Four basic forces act on an airplane while in flight: lift, weight, drag, and thrust. These four forces and their directions are indicated in the image attached.

If the thrust acting on an airplane is greater than the drag, then

A. The airplane will accelerate backward.

B. The lift will be greater then the weight.

C. The airplane will accelerate forward.

D. The weight will be greater than the lift

Answer:

C. The airplane will accelerate forward.

Explanation:

From the image attached, we can see that the thrust is the forward force responsible for pushing the plane forward while the drag is the one resisting this forward motion.

Thus, if the thrust is greater than the drag, it means the plane will accelerate forwards.

Thus, option C is correct.

I'm not sure what you were trying to put here

Answer:

A magnet

Explanation:

is an object that can attract some metals like iron

Answer:

A helpful mutation like camoflage would immensely help a species survive and flourish. The reason being the appliances of such a mutation. Camoflage is one of the most apllicable of abilities. It can be used as a defense mechanism, to hide in plain sight, it can be used offensively to avoid being seen while hunting and it can even be used as a form of communication between the species. All of these appliances would greatly benefit the species and would most definitely help it survive and flourish.

Explanation:

K.E = 1/2mv²

K.E = 1/2 x 4 x 0.5²

K.E = 0.5J

Answer:

A

Explanation:

potential energy is energy due to position

Answer:

Simple harmonic motion is difficult to generate since real processes have irreversibilities, which are omitted in the physical model and represented by physical concept of damping.

Explanation:

It is very difficult to generate simple harmonic motion since real processes have irreversibilities that dissipy the mechanical energy within the system (e.g. air viscosity, friction), meaning that a permanent presence of an external load is needed to counteract such damping effects, in contrast with simple harmonic motion, where motion is self-sustained.

Answer:

b

Explanation:

it melts yes but it's still water [same element] so there fore it's a physical change

Answer:

It does not change the chemical composition of water. Explanation: A physical reaction is defined as the reaction in which a change in shape, size takes place. No new substance gets formed in these reactions.

Explanation:

Hope this helped

Answer:

4.0×10⁻¹⁷ N

Explanation:

Answer:

ice is a poor conductor of heat and less dense than water. During winter, ice floats and insulates the water under it. Below the frozen layer, the water remains in its liquid state and does not freeze. Also, oxygen is trapped beneath the layer of ice. This makes it possible for aquatic animals to survive during winter.

Answer:

The answer would be TRUE

Explanation:

The mean resonance frequency of the human middle ear under air conduction (AC) excitation is known to be around 0.8-1.2 kHz. However, studies suggest that the mean resonance frequency under bone conduction (BC) excitation is at a higher frequency around 1.5-2 kHz.

can i plz have brainliest???

Answer:

T

Explanation:

its true

Answer:

The Answer is gonna be According D.separate atoms from their electrons

Answer:

yes they can

Explanation:

sure if they want