An 800 kg car exerts 4000N of applied force on a level road while
being opposed by 700 N of friction. Determine the acceleration of the car.

Yes, unless its not a main source.

B and D

Explanation:

The scientists need to replicate her experiment and to do that you need actual sunlight,it can't be carried out in a laboratory

Hope this helped

When light wave is refracted, the wave changes direction.

Refraction of waves refer to the process that result in a change in waves direction as the wave is transmitted from one medium to another. Refraction of wave can be the process of bending of the path of the waves which is caused by a change in speed and wavelength of the waves.

Therefore, When light wave is refracted, the wave changes direction.

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lighting discharge, b: stay away from tall things, and stay away from any items that conduct electricity

Answer:

magnitude and direction

The value of resistance will be 60 ohms. Resistance is the opposition force offered to the flow of electric current. The ratio of the voltage to the electric current passing through the wire.

A resistor is a two-terminal passive electrical component that acts as a circuit element by implementing electrical resistance.

Resistors are used to limit current flow, alter signal levels, divide voltages, bias active devices, and complete transmission lines in electronic circuits.

The given data in the problem is;

V is the voltage =  3. 0 V

I is value of electric current=  0. 05 A

R is the resistance=?

According to ohm's law, the potential difference between the two ends of the conductor is equal to the product of electric current and the resistance generated.

So from the ohm law;

V= IR

[tex]\rm R = \frac{V}{I} \\\\ \rm R = \frac{3}{0.05} \\\\ \rm R =60 \ ohm[/tex]

Hence the value of resistance will be 60 ohms.

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Answer:

An object could be determined as solid:

-It doesn't change shape easily.

-when lots of heat applied till melting point, it would melt or thaw (basically turn into liquid).

-turn to pieces or bent when enough force applied to it.

-the molecules attached with each other by strong forces, creating strong bonds.

An object could be determined as liquid:

-It changes shaped based on the container.

-when lots of heat applied till boiling point, it would vaporize

-the molecules have weak bonds, creating a lot of spaces.

-when heat extracted from the liquid till freezing point, it would freeze/hardened (turn into solid)

An object could be determined as gas:

-it doesn't have any shape or form.

-if fills in the container.

-if lots of heat applied, its molecules are going to move, vibrate,and transist faster; increasing pressure and volume.

-The molecules have very weak bonds, creating spacious space.

-when the heat are being extracted till certain freezing point, it is going to turn into liquid, then solid.

Answer:

D. a balance, water, and a beaker

Hope this helps!

Answer:

Explanation:

D. a balance, water, and a beaker

Colors so bright

They catch your eye

You can see them from miles away

They shine in the night

Such beauty from dye

Oh so many ways they can array

litterly just got this off the top of my head. it was fun making.

The amount of work required to lift the object is 1029 J. And the amount of potential energy gained by the object is 1029 J.

Work can be defined as the product of force and distance. The s.i unit of work is Joules (J).

To calculate the amount of work required to lift the object, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

The amount of gravitational potential energy gained by the object is the same s the amount of work required to lift the object

Therefore,

Hence, The amount of work required to lift the object is 1029 J. And the amount of potential energy gained by the object is 1029 J.

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Answer:

The energy transferred to the gas is 9 mJ

Explanation:

Given;

initial volume of the gas, v₁ = 5 x 10⁻⁵ m³

final volume of the gas, v₂ = 4.7 x 10⁻⁵ m³

initial pressure of the gas, P₁ = 5.4 x 10⁴ Pa

final pressure of the gas, P₂ = 5.7 x 10⁴ Pa

The work done in compressing the gas is given by;

W = ΔPV = (P₂ - P₁)(V₂ - V₁)

W = (5.7 x 10⁴ Pa - 5.4 x 10⁴ Pa)(4.7 x 10⁻⁵ m³ - 5 x 10⁻⁵ m³)

W = (3000)( -3 x 10⁻⁶)

W = - 9  x 10⁻³ J

W = -9 mJ

Thus, the work done in compressing this gas is equal to the energy transferred to the gas = 9 mJ

Answer:

2Ca+ O2 ------> 2CaO

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Answer:

When energy is added to a wave How can the wave change? The energy transported by a wave is directly proportional to the square of the amplitude. So whatever change occurs in the amplitude, the square of that effect impacts the energy.

Explanation:

Answer:

when completing a science experiment it is important to run multiple tests do as to reduce the risk of any outliers of false results

The purpose of this process is to reduce the risk of having outliers of false results

Although the experiment you are referring to in your question is missing the general principle when conducting an experiment is the running of multiple tests before coming up with an actual test result.

Therefore when completing a science experiment it is important to run multiple tests like heating the substance several times until a constant mass value is obtained,  in other to ascertain the results. the reason why such process is undertaken is to  reduce the risk of having outliers of false results.   Also

A scientific experiment involves several procedures and this depends on the type and purpose of the experiment.

for example: An experiment with the purpose of determining how the mass of an object reacts to heat will require the mass of the object to be recorded  after heating the object/substance several times.

Hence we can conclude that the purpose of the process is to reduce the risk of having outliers of false results.

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An example of acceleration is someone that's riding a carousel and a skydiver that's in free fall and deceleration is when one presses the brake while driving.

It should be noted that acceleration simply means the rate at which velocity changes with time.

In this case, an example of acceleration is someone that's riding a carousel and a skydiver that's in free fall and deceleration is when one presses the brake while driving. Acceleration can also be the fall of an apple from the tree.

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Answer:

biological: they can affect our train of thought and how we do or react to things. (Biological factors that influence human behavior can consist of our drive to be warm, fed, sheltered, have companionship (with some humans having stronger biological drives to reproduce), and be free from harm and oppression.)

environmental: the environment can influence mood. (The environment can facilitate or discourage interactions among people and the subsequent benefits of social support)

Explanation:

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have an awesome day -TJ

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Answer:

C

Explanation:

vectors are any quantities that have both magnitude and direction

therefore both inertia and weight are both vectors

Answer:

2

Explanation:

because if both of them collided they have the same momentum

Answer:

I cannot see the choices for no. 10, so I'll answer no. 8 and no. 9.

8. a. keep the Earth from tilting on its axis

9. c. an Earth-centered to a sun-centered model

Explanation:

8. The tilting of the Earth on its axis (23.5 degrees) is greatly related to the weather/seasons in different countries. It also affects the amount of daylight that a specific area receives. Keeping the Earth from tilting on its axis would allow your area to receive the same length of sunlight because not tilting at all leads to fewer number of variations.

9. The Earth was thought to be the center of the universe in accordance to the Ptolemaic system. However, this changed through "Heliocentrism," which states that the "sun" is the center of the solar system.

[tex]\longrightarrow \textsf{D. A bicycle sitting on the ground} [/tex]

Let us check all options -

Answer:

Because all machines lose input work to friction, one way to improve the efficiency of a machine is by reducing friction.    Hope this helped :))

Explanation:

Answer:

Elements that are noble gases are helium, argon, xenon, krypton, neon and radon.

Answer:

MOMENTUM= FORCE*MASS

= 140*5

= 700 kg⋅m/s

Half circle crescent shape represents the shape of concave mirror which is also known as converging mirror.

A concave mirror which also called converging mirror, has a reflecting surface that goes inward. Concave mirrors are used to focus light so we can conclude that Half circle crescent shape represents the shape of concave mirror  and also known as converging mirror.

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Answer:

the answer is C

Explanation:

just got it right hope this helps! :D

Answer:

Small asteroids

Explanation:

Mars has 2 moons, Phobos and Deimos, that each have characteristics similar to small asteroids.

Nah we don't need a new planet

Explanation:

will can still manage our planet

Answer:

11900 meters

Explanation:

Use the Potential energy = mgh formula, substituting these in to get 11.1x10^6 = 95 x 9.81 x h.

Rearrange to make h the subject and the answer given is 11900 (3sig.fig.)

The maximum height to which he can climb will be 1.168 x 10⁴ meters.

The potential energy of a body is the energy of the body due it position. The potential energy always exist for two bodies which are in mutual interaction with each other for example by a force. For body a on earth, the potential energy of the body - earth system is -

E[P] = mgh

Given is a mountain climber that has a mass of 95 kg.

We can write -

Mass of climber = [M] = 95 kg

Energy gained by eating the chocolate = [E] = 11.1 MJ = 1.11 x 10⁷ joules

Assume that the height achieved achieve by the climber is [h] meters

Therefore, the potential energy gained at that height will be equal to 11 MJ

Therefore -

mgh = 1.11 x 10⁷

95 x 10 x h = 1.11 x 10⁷

95 x 10 x h = 1110 x 10⁴

h = (1110 x 10⁴)/950

h = 1.168 x 10⁴ meters

Therefore, the maximum height to which he can climb will be 1.168 x 10⁴ meters.

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Answer:

1) 10 m/s  2) 14.1 m/s  3) 6.7 m  4) 11.25 m  5) 4.5 m/s  6) 12 joules

Explanation:

Answer:

true

Explanation:

1. Stance

2. Nock

3. Set Draw Hand

4. Set Bow Hand

5. Pre-Draw

6. Draw

7. Anchor

8. Aim

9. Shot Set Up

10. Release

11. Follow-Through & Reflect

Answer:

The sky is the region in which sunlight is scattered in the Earth's atmosphere,

while space is everything beyond that.