A car of mass 150 kg is riding down at constant velocity What is the friction force?

Answer:

The key is that solids hold their shape and they don't flow like a liquid. A rock will always look like a rock unless something happens to it.

Solids can hold their shape because their molecules are tightly packed together.

Explanation:

Yes; it is a solid

Answer:

its when a liquid, prolly water, turns into a vapor !!

Explanation:

and nice pic uwu

A liquid turning into a gas is evaporation. It is how water gets from the surface of the Earth to the atmosphere.

Latent heat is a form of energy held in the evaporated water when it evaporates and cools.

Evaporation plays a significant role in the energy exchange that results in atmospheric motion, affecting weather and climate in the Earth-atmosphere system.

The particles with the highest kinetic energy are the first to evaporate from a liquid.

Most of the air's moisture evaporates from rivers, lakes, seas, and oceans. Water at the surface of the Earth evaporates into water vapor, which rises into the sky and forms clouds, which eventually release water back onto Earth as precipitation.

Answer:As the name implies, the Bump and Run Reversal (BARR) is a reversal pattern that forms after excessive speculation drives prices up too far, too fast. Developed by Thomas Bulkowski, the pattern was introduced in the June-97 issue of Technical Analysis of Stocks and Commodities and also included in his book, the Encyclopedia of Chart Patterns.

THIS AIN'T MINE

Answer:

to collide with (something) with a moderately forceful impact; thump.

Explanation:

Answer:

The time it takes to stop is 13.75 seconds

Explanation:

A body moving with constant acceleration, 'a', for a time, 't', has a final velocity, 'v', given by the following kinematic equation;

v = u + a·t

Where;

v = The final velocity of the body

a = The acceleration of the body

t = The time of acceleration (accelerating period) of the body

u = The initial velocity of the body

The given parameters for the acceleration of the car are;

The initial velocity of the car, u = 0 m/s (a car starting from rest)

The constant acceleration of the car, a =  5.5 m/s²

The acceleration duration, t = 6 s

Therefore, we have;

The final velocity of the car after the acceleration, v = 0 m/s + 5.5 m/s² × 6 s = 33 m/s

The final velocity of the car after the acceleration, v = 33 m/s

When the car slows down uniformly, and comes to a stop (final velocity, v₂ = 0 m/s), it has a constant negative acceleration, (deceleration) '-a₂'

The given parameters when the car slows down  are;

The deceleration, -a₂ = 2.4 m/s²

The final velocity, v₂ = 0 m/s

The initial velocity, u₂ = v = 33 m/s

The time it takes to stop = t₂

-a₂ = 2.4 m/s²

∴ a₂ = -2.4 m/s²

From, v = u + a·t, we have;

v₂ = v + a₂·t₂

By plugging in the values of the variables, we have;

0 m/s = 33 m/s + (-2.4 m/s²) × t₂

∴ 2.4 m/s² × t₂ = 33 m/s

t₂ = 33 m/s/(2.4 m/s²) = 13.75 s

The time it takes to stop, t₂ = 13.75 seconds

Answer:

1 AND 3

Explanation:

Answer:

11

Explanation:

the O at the end stands for oxygen and after that theres the number 11. that tells u how many oxygen atoms there are PLEASE AMRK BRAINLIEST ;C

Answer:

Most likely in a blacked-out air sealed container!

Hope I helped! Plz mark me brainiest I need it!

Answer:

Explanation:

The formula for kinetic energy  Ke=1/2mv^2 where Ke is kinetic energy, m=mass, and v= velocity.

If the kinetic energy is increased that means that there must be an increase in mass or velocity. However, since the velocity is squared that means that velocity affects the kinetic energy of the object more than the mass does.

Answer:

Distance, S = 15m

Explanation:

Given the following data;

Mass = 4kg

Force = 10N

Initial velocity = 5m/s

Final velocity = 10m/s

To find the distance;

First of all, we would calculate the acceleration

Force = mass * acceleration

10 = 4*acceleration

Acceleration = 10/4

Acceleration = 2.5m/s²

Now to find the distance, we would use the third equation of motion.

[tex] V^{2} = U^{2} + 2aS [/tex]

Where;

S represents the displacement measured in meters.

Substituting into the equation, we have;

10² = 5² + 2*2.5*S

100 = 25 + 5S

5S = 100 - 25

5S = 75

Distance, S = 75/5

Distance, S = 15m

Answer:

I can't get a clear explanation of the question

Answer:

K. E= 1/2MV²

125 = 1/2M5²

multiply both side by 2

250 = 25M

M= 10kg

Answer:

sorry

Explanation:

i don't know this but when i find the answer i will type here

Gamma rays of electromagnetic radiation with a relatively high amount of energy is used to sanitize lab goggles.

A gamma ray, also known as gamma radiation, is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays.

Moreover, gamma rays are the most harmful external hazard. Beta particles can partially penetrate skin, causing “beta burns”. Alpha particles cannot penetrate intact skin. Gamma and x-rays can pass through a person damaging cells in their path.

Therefore, both x-rays and gamma rays are forms of high-frequency (high-energy) ionizing radiation, which means they have enough energy to remove an electron from (ionize) an atom or molecule. Ionizing radiation can damage the DNA (genes) inside a cell. Sometimes this can lead to cancer later on.

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Answer:

125N

Explanation:

500/4=125N

Answer:

Temperature or thermal energy.

Explanation:

Conduction involves the transfer of electric charge or thermal energy due to the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction while when it relates to thermal energy, it is known as heat conduction.

In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.

Hence, the temperature or thermal energy of matter depends on how much the particles are moving, which depends on the amount of kinetic energy the particles possess.​

Answer: Sports Illustrated noted that analytics in a sport such as a football is widely used to manage injury prevention. Basketball coaches make use of statistics such as field-goal attempts, effective field goal percentage, free throw attempts, and free throw percentages.

Explanation: BRAINLEST?

Answer:

4 N

Explanation:

mass = 2 kg

acceleration = 2 m/s^2

Force = mass * acceleration

         = 2 *2

         = 4 N

Answer:

Explanation:

Impulse = Force × time

So 88× 3 =264!!

Answer:

264 kg*m/s

Explanation:

One movement is walking. A skill we use is writing. Another movement is blinking. Another skill we use with muscles is typing. And finally, another skill we use muscles during is brushing your teeth.

Answer:

Mitochondria and plastids are the two organelles that contain their own genetic material. Both these organelles have their own DNA and ribosomes.

Answer:

A

Explanation:

Answer:

The answer is D

Explanation:

I took he test and got it correct.

Answer:

Sixty percent of all active volcanoes occur at the boundaries between tectonic plates. Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. Some volcanoes, like those that form the Hawaiian Islands, occur in the interior of plates at areas called “hot spots.”

Explanation:

Volcanoes are found around tectonic plates because the convection currents move the plates. Where convection currents diverge near the Earth's crust, plates move apart. Where convection currents converge, plates move towards each other, plates converge and the plates move together, also known as ridge push, therefore mountains and volcanoes are formed

Hope this helps :)

Answer:

The jet stream speed used by the computer is 142.[tex]\overline {857142}[/tex] km/h

Explanation:

The given parameters are;

The distance between the two cities the plane flies = 4,000 km

The difference in flight times for outgoing and return flights = 70.0 min

We note that 70 min = 70 min × 1 h/60 min = 7/6 h

The airspeed recommended by the airline computer = 1,000 km/h

Let 'a' represent the jet stream speed

The time it takes the plane moving in the same direction as the jet stream between the two cities, 't₁', is given as follows;

[tex]t_1 = \dfrac{4000}{1000 + a}[/tex]

The time it takes the plane moving in the opposite direction as the jet stream between the two cities, 't₂', is given as follows;

[tex]t_2 = \dfrac{4000}{1000 - a}[/tex]

The difference in flight times for outgoing and return flights, Δt = t₂ - t₁

Therefore, we have;

[tex]\Delta t = t_2 - t_1 = \dfrac{4000}{1000 - a} - \dfrac{4000}{1000 + a} = \dfrac{7}{6}[/tex]

From which we get;

[tex]-\dfrac{8000 \cdot a}{a^2 -1,000,000} = \dfrac{7}{6}[/tex]

By cross multiplying, we have;

-48,000·a = 7·a²- 7,000,000

∴ 7·a² + 48,000·a - 7,000,000 = 0

Factorizing with a graphic calculator gives;

(7·a - 1,000)·(a + 7,000) = 0

∴ a = 1,000/7, or a = -7000

Therefore, the jet stream speed the computer is using, a = 1,000/7 km/h = 142.[tex]\overline {857142}[/tex] km/h.

Answer:

A

Explanation:

i got it from 2021 edge

Answer:

idc

Explanation:

idc

Answer:

the advantage gained by the use of a mechanism in transmitting force specifically : the ratio of the force that performs the useful work of a machine to the force that is applied to the machine.

Explanation:

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever.

Answer:

125 joules

Explanation:

The velocity of the runner having a mass of 75 kg will be 9.93 m/s.

The energy of the body by virtue of its motion is called its kinetic energy.

Given is velocity of a runner who has a mass of 75 kg and 3,700 Joules of energy.

The kinetic energy of the body is given by the following formula -

KE = 1/2 mv².

Substituting the values -

3700 = 1/2 x 75 x v²

7400 = 75 x v²

v² = 7400/75

v² = 98.66

v = 9.93 m/s

Therefore, the velocity of the runner having a mass of 75 kg will be 9.93 m/s.

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Answer:

Dorsal side:B

Ventral side:D

Anterior end:A

Posterior end:C

Explanation:

The four regions of the earthworm are, A is the anterior end,B is the dorsal side, C is the posterior end, and D is the ventral side.

Earthworms are common soil dwellers who are both safe and useful. Earthworms help plants flourish by collapsing dead and decaying organic debris into rich humus soil.

They also aerate the soil and enhance flow by digging small canals and holes.

The four regions of the earthworm are;

A is the Anterior end

B is the Dorsal side

C is the Posterior end

D is the Ventral side

Hence all the regions are clearly defined with the help of digrame.

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