WILL MARK BRAINLIEST IF GOTTEN RIGHT!

Answer:

b and c

Explanation:

you had it correct :)

Answer:

It's C and D.

Explanation:

10m/s !!!!!!!!!!!!!!!!!!!!!!!

Answer: None

Explanation:

    Since the wall did not move, it does not matter how much force you generated. You did no work in the physics sense.

    Work is calculated by multiplying the displacement by the force. Since there was no displacement (no movement) we put the value as 0. 0 times anything is still 0, as shown below.

2500 N * 0 = 0.

    You did no work, or 0 J of work.

Answer:

the total energy before collision is 12.25J

the total energy after collision is tranfered to sound and heat (by the friction between the two clay balls)

Explanation:

first we should know the velocity of the 2 balls:

momentum=mass ×velocity

we have the momentum and the mass of the 2

so momentum ÷mass=velocity

clay ball 1 velocity=7 m/s & clay ball 2 velocity= -7 m/s

KE=1/2 mv²

1/2 ×0.25×7²=6.125J KE of ball 1

1/2 ×0.25×-7²=6.125J KE of ball 2

add them both we will have 12.25J which is before collision

this energy will then be tranfered to heat and sound as they stop after the collision(velocity =0m/s)

Answer:

I THINK ITS B but I'm not suresorry

Answer:

In 5 years or so, the sun will be awash in sunspots and more prone to violent bursts of magnetic activity.

Explanation

once the magnetic field weakens the area and cold plasma enters the area of the sunspot

Answer

The answer is C I took the test an got an A.

Explanation:

K12 ASTRONOMY 7.07.04

Answer:

Explanation:

Given;

initial velocity of the rock, u = 15.5 m/s

at maximum height the final velocity of the rock, v = 0

The height risen by the rock is calculated as follows;

v² = u² - 2gh

0 = u² - 2gh

2gh = u²

h = u² / 2g

h = (15.5²) / (2 x 9.8)

h = 12.26 m

The time spent in air by the rock is known as time of flight, which is calculated as follows;

v = u - gt

0 = u - gt

gt = u

t = u/g

where;

t is the time to reach maximum height

t = 15.5 / 9.8

t = 1.58 s

Time of flight (time spent in air) is calculated as;

T = 2t

T = 2 x 1.58 s

T = 3.16 s.

Answer:

a)  m*g*hi = m*g*hf [tex]_{f}[/tex]

         h[tex]_{i}[/tex] = h

b)  ratio = 1.22

c) the potential energy is converted to both rotational kinetic energy and translational kinetic energy

Explanation:

For a frictionless system : initial energy = final energy

i.e. Ei = Ef

a) Prove

Total Initial energy for First cylinder ( Ei ) = m*g*hi      

The final energy of the first cylinder ( Ef ) = m*g*hf

and this energies are purely potential energies

According to conservation of energy :

m*g*hi = m*g*hf

         hi = hf   ( and this holds for both cylinders because they where both kept at the same height initially  )

i.e. initial height = final height ( hence it is proved that both cylinders will reach their initial heights )

b) Determine the ratio of the time taken by both cylinders

lets assume height of incline ( h ) = Lsin[tex]\beta[/tex]

where L = distance covered by cylinder

Final velocity of first cylinder ( V1 )  = [tex]\sqrt{\frac{4}{3} gLsin\beta }[/tex]  

Final velocity of  second cylinder ( V2 ) = [tex]\sqrt{2gLsin\beta }[/tex]

( following the application of the law of conservation of energy )

Given that ; Time taken = displacement / velocity  

hence the ratio = ( h / v1 ) / ( h / v2 )

where h = Lsin[tex]\beta[/tex]

the ratio = 1.22

c) The time for the rolling motion is greater than the time for the sliding motion because the potential energy is converted to both rotational kinetic energy and translational kinetic energy

Answer:

Hello your question is vague hence I will provide a general answer on the importance of : Waste reduction, rationalization of consumption, reuse, recycling as ways of preserving the natural resources

answer :

Waste reduction : when we reduce the amount of wastage on items we use especially items produced from natural raw materials we will help preserve the natural resource because they can be used to produce varieties of other items

Reuse and recycling of waste products help keep our natural environment healthy thus preserving our natural resources.

Explanation:

Waste reduction, rationalization of consumption, reuse and recycling are all ways of preserving our natural resources

Waste reduction : when we reduce the amount of wastage on items we use especially items produced from natural raw materials we will help preserve the natural resource because they can be used to produce varieties of other items

Reuse and recycling of waste products help keep our natural environment healthy thus preserving our natural resources.

Answer:

Frequency = 260 Hz and wavelength = 1.31 m

Explanation:

Given that,

A hammer begins vibrating back and forth at approximately 260 cycles per second.

(a) The frequency of an object is the number of vibrations per unit time. The frequency of the sound wave is 260 Hz.

(b) The speed of sound in air is 343 m/s. So,

[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{343}{260}\\\\\lambda=1.31\ m[/tex]

Hence, this is the required solution.

Answer:

Climate Change and Extreme Weather

Establishing the most likely causes behind an extreme weather event can be challenging, since these events are due to combinations of multiple factors, including natural variability.

Explanation:

please give me brainlist and follow

Answer:

Thrust is the force acting normally to a surface. So, Thrust = 1200 N. And , Pressure = Thrust / Area. = 1200 / 0.001. = ...

Explanation:

this right like me

Answer: lots of them

Explanation:

the salt solution exerts a greater up thrust on the egg which balances the weight of the egg, so the egg floats in a strong salt solution but sinks in fresh water

Answer:

a. Centrifugal force = 1230.77 Newton.

b. Centrifugal force = mv²/r

c. Centrifugal force = 4923.08 Newton.

Explanation:

Given the following data;

Mass = 800kg

Radius = 65m

Velocity = 10m/s

a. To find the force;

Centrifugal force = (800*10²)/65

Centrifugal force = (800*100)/65

Centrifugal force = 80000/65

Centrifugal force = 1230.77 Newton.

b. The force associated with the car is generally referred to as centrifugal force because it's the force required to keep the car in a curved or circular path. It can be calculated using the formula;

Centrifugal force = mv²/r

c. To find the force at twice the speed;

Velocity = 2 * 10 = 20m/s

Centrifugal force = (800*20²)/65

Centrifugal force = (800*400)/65

Centrifugal force = 320000/65

Centrifugal force = 4923.08 Newton.

a. To achieve a car of mass 800 kg goes round a corner of radius 65 m at a            speed of 10 m/s , needed 1230.77 Newton centripetal forces.

b. When an object goes round a corner then centripetal forces keep that object moving in a curved path.

c. When speed is twice. then, 4923.07 Newton centripetal forces needed.

a. Given that car of mass 800 kg goes round a corner of radius 65 m at a

    speed of 10 m/s.

  Centripetal force ,[tex]F=\frac{mv^{2} }{r}[/tex]

  Where m is mass, v is speed of object and r is radius.

   Substituting all values in above equation.

                    [tex]F=\frac{800*10^{2} }{65} =1230.77Newton[/tex]

b. Centripetal force is defined as, the force that is necessary to keep an    object moving in a curved path and that is directed inward toward the center of rotation.

As a car makes a turn, the force of friction acting upon the turned wheels of the car provides centripetal force required for circular motion.

c. When speed is twice, then  [tex]v=10*2=20m/s[/tex]

      Centripetal force,[tex]F=\frac{800*20^{2} }{65} =4923.08Newton[/tex]

Learn more:

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Answer:

the push pass and the wrist shot i believe

Explanation:

Answer:

Your ans

Explanation:

For floor hockey

Answer: Embryonic differentiation is the process of development during which embryonic cells specialize and diverse tissue structures arise.

Explanation:

Answer:

It moves faster when its further away

Explanation:

It happens in early January about 2 weeks after the Northern winter solstice

Answer:

[tex]y = \frac{ - 1}{3}x + \frac{7}{3} [/tex]

Explanation:

[tex] \frac{y - 3}{2 - 3} = \frac{x + 2}{1 + 2} \\ \ - y + 3 = \frac{x + 2}{3} \\ y = \frac{ - 1}{3}x + \frac{7}{3} [/tex]

Answer:

No information can be concluded from this observation alone the cloud is much cooler than hydrogen on Earth

Answer:

One that we describe using our 5 senses

Explanation:

A physical property describes something we can physically observe.

Yes Convex Lens Can form virtual images which are magnified, provided the object distance, measured from the optical centre must be less than focal length.

For your question,

let focal length, f = + 6 cm

let object distance be 'u'

let image distance be 'v'

magnification required, m = +3, +ve because image will be erect, according to the property of convex lens:

Answer:

[tex]F_c = \frac{KQ_1Q_2}{R^2}[/tex]

Explanation:

Coulomb’s law is given as;

[tex]F_c = \frac{KQ_1Q_2}{R^2}[/tex]

where;

F is the electric force between q₁ and q₂

k is the coulomb’s constant  = 9 x 10⁹ Nm²/C²

r is the distance between the two charges

q₁ and q₂ are the two charges

Therefore, the coulomb’s law is given as [tex]F_c = \frac{KQ_1Q_2}{R^2}[/tex]

Answer:

support the structure of ur body

Explanation:

it gives the body its shape,allows movement,and also provides protection for ur organs

Answer:

The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals. The skeletal system is also called the musculoskeletal system

Explanation:

Answer:

1Burning of fossil fuel

2Deforestation

3Waste disposal in landfills

Explanation: took test:)

Human activities intensify the greenhouse effect as:

Deforestation -destroys natural carbon sinks, leading to more CO₂ in the air

Burning fossil fuels - the primary cause of human-created carbon emissions

Waste disposal in landfills - emits methane from decomposing matter

The greenhouse effect can be defined as a process that occurs when energy heats the planet's surface, but greenhouse gases in the atmosphere stop the heat from returning directly to space and warm the earth.

The natural greenhouse effect retains the earth from freezing at the below-freezing temperature that it will freeze if there were no greenhouse gases. Human activities increase greenhouse gases and trap larger amounts of heat, which cause the Earth's temperature to grow warmer over time.

The Sun delivers most of its energy as visible light and near-infrared light, while the average surface temperature of the Earth emits longer-wavelength infrared IR and radiant heat. These gases emit radiant heat in all directions, traveling heat to the air and warming other greenhouse gases in the atmosphere.

Learn more about the greenhouse effect, here:

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Answer:

the average current is 8000 A

Explanation:

I got it answered by an expert

Answer:

A. It is made of tissues that can conduct electricity, a required function in a system.

Explanation:

The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.

Answer:

D

Explanation:

it is D because a system needs to manage a large organism like us to allow us to live, therefore, needs to work with other systems to keep us alive

Specific heat capacity is defined as the amount of heat required to raise the temperature of 1 kilogram of a substance by 1 kelvin (SI unit of specific heat capacity J kg−1 K−1). From: Basic Physics and Measurement in Anaesthesia (Fourth Edition), 1995.