hii i am satyam from India and i m having doubt in this question according to me answer should be 20 % but in answer key it's 21 % how??

A moving item possesses kinetic energy. If we want to accelerate an object, we must exert a force. Applying force requires effort on our part. Once the process is complete and energy has been transferred to the item, it will begin to move at a new constant speed.

Kinetic energy is the energy that an object has as a result of motion. It is defined as the work required to accelerate a mass-determined body from rest to the indicated velocity. Unless its speed changes, the body retains the kinetic energy it gained during acceleration.

Using the formula - K.E. = 1/2 × m × v²

K.E. = 1/2 × 0.4 × 20²

K.E. = 80 kg m/s²

The energy of motion is called kinetic energy, and it can be observed in the movement of an object, particle, or group of particles. Any moving object, such as a person walking, a baseball being thrown, food falling off a table, or a charged particle in an electric field, utilizes kinetic energy.

To know more about kinetic energy between the balls motion, click on the link below:

https://brainly.com/question/25959744

#SPJ9

Answer:

20 20 20 20 25 points 20 20 20 25 points

Explanation:

Amy's distance and displacement if she runs 2 miles south, then turns around and runs 3 miles north is 1 mile.

This is referred to as the change in the position of an object and it is usually measured in meters by finding the difference in location between the two bodies involved.

We were told that she runs 2 miles south, then turns around and runs 3 miles north and they are at exact opposite sides on the map which means that the displacement will be:

3 miles - 2 miles

= 1 mile hence, it is the correct choice.

Read more about Displacement here https://brainly.com/question/14422259

#SPJ1

Because of this, race cars have streamlined bodies that enable them to go at significantly higher speeds.

As there is less surface area to push the air against, the streamlined designed car will be able to cut through the air and produce less drag or resistance. They move slowly, as opposed to autos, which are not streamlined. Because of this, race cars have streamlined bodies that enable them to go at significantly higher speeds.

In order to push against the force of the air, objects must be streamlined. Trains are made to move quickly between destinations because of their streamlined form. Even people, like swimmers, can attempt to be streamlined.

To know more about Air resistance visit:

https://brainly.com/question/19165683

#SPJ13

The correct answer are as follows

(i) 250 m is the maximum height

(ii) Time to reach the height is 5 s

(iii) Time of the flight is 10 s

(iv) Horizontal distance from the foot of the tower to point Q is 433 m

Given,  π°= stand as the angle= 30°

h= height= 100m

u= initial velocity= 100m/s

g= acceleration due to gravity= 10m/s²

(i) maximum height= h(max)= u²sin²π°/g

= 100²(sin30°)²/10

= 10000(0.25)/10

= 1000(0.25)

= 250m

height(max)= 250m

(ii)time it takes to reach the height= using π°/g

= 100sin30°/10

= 10 × 0.5

= 5

t= 5s

(iii)time of flight, T= 2t

T= 2(5)= 10

T= 10s

(iv)horizontal distance=H= u²cosπ°/2g

= 100²(cos 30°)/2(10)

= 10000(0.866)/20

= 500(0.866)

= 433

H ( distance)= 433m.

To learn more about horizontal distance, height and time from the given link

https://brainly.com/question/20663604

#SPJ13

The speed of the stone at the bottom of the circle is 4.85 ms⁻¹.

Speed is the time fee at which an object is moving alongside a course, even as the pace is the charge and path of an object's movement. The rate of speed of the function of an object in any course.

velocity is measured because of the ratio of distance to the time in which the space became blanketed. the pace is a scalar amount because it has the most effective route and no magnitude. Speed is the time fee at which an object is moving alongside a path, while the pace is the fee and direction of an item's motion. put another way, the pace is a scalar value, whilst pace is a vector.

At the bottom position,

T - mg = Fc = mv²/r

∴ (T - mg/m)r = v²

V² = (3mg - mg ) r/ m = 2mgr/m

v = [tex]\sqrt{2gr}[/tex]

   = 4.85 ms⁻¹

Learn more about speed here:-https://brainly.com/question/4931057

#SPJ4

The Time it takes a signal to travel the length of the cable of 12 km if the speed of light in the cable and the vacuum are the same is  4×10⁻⁵ s.

Time is the measured or measurable period during which an action, process, or condition exists or continues.

To calculate how long it will take a signal to travel a distance the same as the lenght of the cable, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the time its takes a signal to travel the length of the cable is 4×10⁻⁵ s.

Learn more about time here: https://brainly.com/question/25800303

#SPJ1

Answer:

209.3 m

Explanation:

x component will be  253 cos 55.8

y component will be  253 sin 55.8 = 209.3 m

Answer:

F=m × a - answer is D

Explanation:

F=15N

m=m

a=0.33

15÷0.33=45.45...

Answer:

honestly not sure what to do good luck though

The given problem can be solved using the following free-body diagram:

The diagram is the free-body diagram for the pulley that is holding the weight. Where:

Now we add the forces in the vertical direction:

Adding like terms:

Now, since the velocity is constant this means that the acceleration is zero and therefore the sum of forces is zero:

Now we solve for "T" by adding "mg" from both sides:

Now we divide both sides by 2:

Now we substitute the values and we get:

Solving the operations:

Now we use the free body diagram for the second pulley:

Now we add the forces in the vertical direction:

The forces add up to zero because the velocity is constant and the acceleration is zero:

Solving for the force:

Therefore, the pulling force is equal to the tension we determined previously and therefore is:

The pressure exerted by both on the trampoline is 25,480 N/m².

The pressure exerted by both on the trampoline is the force per unit area which is calculated as follows;

P = F/A

where;

Substitute the given parameters and solve for the pressure exerted.

P = (mg)/A

A = 0.25 m x 0.1 m

A = 0.025 m²

P = (65 x 9.8) / (0.025)

P = 25,480 N/m²

Thus, the pressure exerted at any given surface depends on the applied force and the area of the given surface.

Learn more about pressure here: https://brainly.com/question/25736513

#SPJ1

The resultant distance of the vector is 12.1 m and the angle between two vectors are 48.4°. So the x-component of this vector is, Aₓ = 8.0335 m

Vector is a product that means a parameter has two types of property one is value second is direction. If a parameter has both then it called a vector quantity. Example: Velocity.

To calculate the vector we know first this is a proper vector quantity or not. According to the question, this is a vector quantity. So it has two component, one along x axis another is y axis as shown in the picture.

We have to calculate the x-component, so we are using the formula is,

Aₓ = Acosθ

Here we are given,

A = The resultant distance of the vector = 12.1 m

θ= The angle between two vectors = 48.4°.

Now We have to calculate the x-component = Aₓ

Now we put the known values in the above equation, we get

Aₓ = Acosθ

Or, Aₓ = 12.1*cos(48.4°)

Or, Aₓ = 8.0335 m

According to the calculation we get, the x-component of this vector is, Aₓ = 8.0335 m

Learn more about vector:

https://brainly.com/question/25705666

#SPJ13

Answer:

Explanation:

hey the top of me tried there hardest to find you all a answer instead of saying the person who posted this left a blank so what its just a blank stop being so rude to them they are just trying to help and they helped me on my work that i done so don't be so rude because there just trying there hardest!! :)

At wavelength 2.898 x 10^-7 m radiation is maximum in UV region and at wavelength 2.898x 10^-10 meter in X ray region.

To know more about wavelength visit:

https://brainly.com/question/13533093

#SPJ4

Answers are impossible given the information provided.

P=VI, P=VI, where V is the voltage, I is the current, and P is the power, gives the power in an electric circuit.

We cannot draw any conclusions from the voltage measurement alone because power depends on both voltage and current. The information provided is therefore insufficient.

Answers are impossible given the information provided.

A lamp can be lit when charged electrons (current) are compelled through a conducting loop by the pressure of an electrical circuit's power source. In a nutshell, voltage equals pressure and is expressed in volts (V).

To know more about Power, visit-https://brainly.com/question/24473485

#SPJ4

Therefore:

Answer:

1600W

Electrical energy is energy that has to do with forces acting on electrically charged particles and their motion.

The ability of an atom's charged particles to initiate an activity or move an object is known as electrical energy. Electrical energy is produced by the transfer of electrons between atoms. Electrical energy powers your toaster and phone charger every time you plug them into a wall outlet.

Electrical energy is energy that has to do with forces acting on electrically charged particles and their motion.

The capacitance of a capacitor is given by the following formula

C=∑0A/d

And the electric potential energy stored in a capacitor is given by

∪[tex]Q2[/tex]/2AC

Applying these formula to the given variables, the initial potential energy becomes

∪[tex]0[/tex]=[tex]Q2/2=d/[/tex]∑A

If d becomes 2d, then potential energy becomes

∪0=[tex]Q2/2[/tex] 2D/∑A=2∪0

To learn more about electrical energy refer to:

https://brainly.com/question/874116

#SPJ4

Answer:

The answer is the letter B

Explanation:

Because velocity is a vector quality since to define it is necessary to specify its size (equivalent to speed) and its direction and the letter B tells then velocity is a vector quality that tells the distance an object has traveled over a period of time.

I think than is the letter B

Velocity is a vector quantity that tells the distance an object has traveled over a period of time. So, option (B) is correct.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction is displacement.

Hence, velocity is a vector quantity which can tell displacement of a body , that is, distance between initial and final position - which is equal to  from the distance an object has traveled over a period of time.

Learn more about velocity here:

https://brainly.com/question/18084516

#SPJ2

A. The sun has enough mass to attract the planets. is the correct statement for the given question.

A planet is a celestial body that revolves in an orbit around the Sun, planet has sufficient mass for self-gravity to overcome rigid body forces. It has space around its orbit to revolve around the sun. A gas Giant is a planet composed mainly of gas. Super-Earth is a rocky planet that is larger than Earth.

Neptune-like planets that are about the size of Neptune. A terrestrial is a rocky world that is outside our solar system. The basic reason the planets revolve around the Sun is the gravity of the Sun that keeps them in their orbits. As the Moon orbits the Earth because of the Earth's gravitational pull and the Earth orbits the Sun because of the Sun's gravitational pull.

So we can conclude that the planets orbit the Sun because the sun has enough mass to attract the planets.

Learn more about planets here: https://brainly.com/question/13106554

#SPJ1

The hydrostatic pressure on the bottom of the tank is 197.083 kN.

Given,

Length of tank = 10 m

Width of tank = 8 m

height of tank = 4 m

density of kerosene = 820 kg/m³

depth of oil = 3.5 m

A. Hydrostatic pressure at the underside of the tank:

P = ρ g h

P = 820 x 9.81 x 3.5

P = 28154.7 Pa

B. Hydrostatic force at the underside of the tank:

F = P A

⇒A  = 10 x 8 = 80 meter²

⇒F = 28154.7 x 80

    = 2252.38 kN

C. Hydrostatic force at one edge:

Given,

Width = 8 m

depth = z

A = 4 y

dA = 4 dy

P = ρgh

P = ρgz = ρg(y-0.5)

F = P dA

F = ρg(y-0.5)(4dA)

F = 24.5 ρg

Hydrostatic force at one end = 24.5 x 820 x 9.81 = 197.083 kN.

The pressure exerted by a liquid thanks to gravity at any point in equilibrium. Hydrostatic pressure is proportional to the depth measured from the surface because the weight of the liquid increases when a downward force is applied. Hydrostatic pressure is the force produced by still or still water. this is often the constant force that water pressure exerts on underground walls.

Learn more about Hydrostatic pressure here:-https://brainly.com/question/28206120

#SPJ4

Answer:

x=3

-9x+4= -8-5x

+5x +5x

-4x+4= -8

-4 -4

-4x= -12

/-4. /-4

x=3

Based on the principle of momentum, the momentum of the egg falling from a cliff and which shatters on hitting the ground is conserved.

Momentum is the product of the mass and the velocity of a compound.

Momentum, p = mass * velocity

Momentum is a vector quantity and its unit is kgm/s.

According to the principle of the conservation of momentum, in a system of colliding bodies, the momentum before the collision and the momentum after collision is conserved or equal.

Therefore, the momentum of the egg in the given scenario is conserved.

Learn more about momentum at: https://brainly.com/question/25849204

#SPJ1

The speed of ball #2 after the collision will be 4.5 m/s.

Given,

The mass of ball 1 = 6kg

The mass of ball 2 = 4 kg

Initial speed of ball 1 = 5 m/s

Final speed of ball 1 = 2 m/s

Initial speed of ball 2 = 0 m/s

Let us suppose the final speed of ball 2 is x m/s.

We know that, from the conservation of momentum theorem:

m1.v1(initial) + m2.v2(initial) = m1.v1(final) + m2.v2(final)

6.5 + 4.0 = 6.2 + 4.x

30 + 0 = 12 + 4x

=>4x = 18

=> x = 4.5 m/s

Thus the speed of 2nd ball after the collision will be 4.5 m/s.

Learn more about the conservation of momentum at

https://brainly.com/question/7538238

Constellation is a group of stars that appears to form a pattern or picture. Some of the constellations include Orion, Taurus, Canis Major etc.

Orion is located on the celestial equator and it can be seen throughout the world. This constellation is named after the hunter, in Greek mythology. It is one of the most obvious and recognizable constellations in the sky. Orion is most visible in the evening sky from January to April, during winter season in the Northern Hemisphere, and summer season in the Southern Hemisphere. In the tropics, the constellation moves at the zenith. Orion is bordered by Taurus to the northwest, and by other constellations in other directions.

Taurus is one of the constellations of the 12 zodiac signs. It is a large and prominent constellation in the Northern Hemisphere during winter. It is one of the oldest constellations. The International Astronomical Union gave a three-letter abbreviation for the constellation, as "Tau". During late November-early December, Taurus occupies a furthest point from the Sun and is visible the entire night. By late March, it sets at sunset and completely disappears behind the Sun's glare from May to July.

Canis Major is a constellation in the southern celestial hemisphere. It is a Latin name, which means 'greater dog' in contrast to 'Canis Minor' meaning 'lesser dog'. These both figures are commonly represented as following the constellation of Orion, the hunter, through the sky. Canis Major contains Sirius, the brightest star in the night sky, known as the "dog star". It is bright because of its proximity to the Solar System.

Learn more about Constellation here,  https://brainly.com/question/13166871.

#SPJ1

The third trial of the lab experiment did not work out because in most probability the magnets lost their magnetic properties or got demagnetized.

Demagnetization is the phenomenon by which magnets lose their magnetic property or are weakened. We see that the magnets moved just a little after she left them after the first two trials of her experiment. It is possible that because the magnets moved a little they repelled each other and this only happens when like poles face each other.

The demagnetizing field of one magnet will affect the other and vice versa because their magnetic fields are opposite in direction. Consequently, magnetic field strength weakens gradually. Thus the magnets did not work after the 3rd trial.

Know about magnetic field and its uses:

brainly.com/question/27997275

#SPJ4

The ball experiences an equal and opposing force from the wall as a result of Newton's third law .Therefore, in a perfect world, the ball would return at the same speed it originally did, preserving momentum.

   explain magnitude of the loss in the Kinetic energy?

        To learn more about magnitude refer

       https://brainly.com/question/24256733      

        #SPJ4  

One hypothesis for planetary differentiation is the process through which various layers with diverse chemical and/or physical features arise.

A planet's trajectory around a star, a natural satellite's path around a planet, or an artificial satellite's course around a space object or place, such as a planet, moon, asteroid, or Lagrange point, are examples of orbits in celestial mechanics.

A spacecraft, planet, moon, star, or other object travels on a curved route called an orbit when it is dragged by the gravity of another object.

The force of gravity is what pulls objects with mass in space. An orbit is a path an object follows as it travels around a certain location in space, such as the Moon's orbit of the Earth.

Learn more about planetary differentiation here:

brainly.com/question/1563326

#SPJ1

Fluid viscosity is the property of the fluid that is responsible for the development of the velocity boundary layer. Non-viscous fluids do  not exhibit the property of velocity boundary layer in a pipe.

What is fluid viscosity?

Thickness of a fluid is called its viscosity. In liquids, velocity boundary layer is formed due to viscosity.

Viscosity is also termed as the flow rate of a liquid. If a liquid has a high flow rate then its viscosity is low and vice versa.

The fluid viscosity can be measured by using viscometer. The formula to measure viscosity is F = μA. u/y

Here F is force,  μ is fluid viscosity, A is the area and u/y sheer deformation rate.

On the contrary, a non-viscous fluid is one that has less thickness and can flow easily.

For example, water is a non-viscous fluid.

If you need to learn more about velocity click here:

https://brainly.com/question/25905661

#SPJ4

According to the given statement The mass attached to the spring is 3.99 kg.

A spring system with a block hanging from or affixed to the spring's free end is known as a spring-mass system. The spring-mass system is typically used to calculate the duration of any object in a simple harmonic motion.

F = -kx

where k is the spring constant, and

x is the displacement of the spring

The angular frequency of the spring is:

[tex]\omega=\sqrt{\frac{k}{m}}[/tex]

m is the mass of object attached to the spring

So, frequency:

f = ω/2π = [tex]\frac{1}{2 \pi} \sqrt{\frac{k}{m}}[/tex]

m = 4π²f² / k

given that f = 0.9 Hz, and

k = 9 N/m

m = (4×π²×0.9²)/8

m = 3.99 kg

To know more about Spring mass system visit:

https://brainly.com/question/23365867

#SPJ4