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The velocity of the monitor as it hits the ground is equal to 40.58 m/s.

Given the following data:

Scientific data:

In accordance with the law of conservation of energy, the potential energy possessed by the monitor at the roof top would be equal to the kinetic energy possessed by the monitor at the ground:

[tex]PE=KE\\\\mgh=\frac{1}{2}mv^2\\\\2mgh=mv^2\\\\V=\sqrt{2gh}\\\\V=\sqrt{2 \times 9.8 \times 84}\\\\V=\sqrt{1646.4}[/tex]

V = 40.58 m/s.

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This is not something that waves do because they need a medium to travel through, while particles do not.

A light travels without any medium while on the other hand, a medium is required for sound waves to move from oe place to another. Sound is a mechanical wave that cannot travel through a vacuum.

So we can conclude that electromagnetic waves like light do not require medium for its propagation.

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Answer:

B

Explanation:

did this yesterday with my friend

Answer: Tagged players perform a fitness activity

Explanation: Proof of validity is shown below.

Answer:

75 km/hour

Explanation:

Total distance travelled= 200+25 = 225 km
Total time= 2+1 hours = 3 hours
Average speed= Total Distance/Total time = 225/3 = 75 km/hr

Answer:

5N

Explanation:

Work done by a constant force is given by the following equation:

W=F⋅d⋅cos(θ)

where F is the applied force, d is the distance over which the force is applied, and θ is the angle between the force and displacement vectors.

In this case, the work is done by gravity, and as the object is assumed to fall straight down, θ=0^o.

We know that the force of gravity acting on an object can be expressed by FG=mg, and for an object which is not accelerating (e.g. a stationary object), this is equal to the object's weight.

We know d=10m,θ=0^o and W=50J, so we can solve for F to find the object's weight. ⇒F=Wdcos (θ) But cos (0^o)=1, so: F=Wd=50J10m=5N

Answer:

72 km / hour

Explanation:

Speed equals to distance over time. We are given distance equal 360 km and time in 5 hours.

Hence:

[tex]\displaystyle \large{s=\frac{360}{5}}\\\displaystyle \large{s=72}[/tex]

Therefore, the speed is 72 km / hour.

Notes

Sometimes, speed is defined as ‘v’ while velocity is defined as ‘v vector’ indicating that velocity is speed with direction and speed is just velocity with only magnitude.

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The resultant wave of the different wave functions is = y1 + y2

The principle of superposition states that two waves moving through the same medium, the resultant value of the wave function is the sum of the different wave functions.

Waves superimpose by adding their disturbances,each disturbance corresponds to a force, and all the forces add.

Therefore, the resultant wave of the different wave functions is the addition of both wave functions which is = y1 + y2.

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Answer:

Labeling from top left to bottom right

A) transmission - direct light being transmitted as direct light

B) reflection - light being reflected back

C) refraction - incident light being refracted

D) diffraction - diffracting slit shown

E) absorption - light absorbed and reemitted

F) scattering - light scattered in different direction

Answer:

its c - the migration of birds

Explanation:

i did it on study island

Answer:

in the beginning the kinetic energy is at a maximum level because the starting velocity is high comparatively.. and because of the gravitational acceleration acting on the ball in the opposite direction the kinetic energy drops proportionally because of the velocity drop. after the ball reaches it's maximum height the potential energy of the ball is high because of the height.. and again the kinetic energy starts to build because the ball again starts to fall down..

Explanation:

Hope this was helpful

Answer:

Scientists have identified about a dozen major and several minor tectonic plates

For two moles of helium gas initially at 335 K and 0.58 atm are compressed isothermally to 1.44 atm, The solutions are is mathematically given as

Generally, the equation for the Ideal gas law  is mathematically given as

PV=nRT

Therefore

V1=2*8.31451*335/(0.58*1.01325*105)

V1=0.09479 m3

Also

V2=V1*(P1/P2)

V2 =0.09479*(0.58/1.44)

V2=0.03818 m3

b)

W=nRTLn(V2/V1)

W=2*8.31451*335*Ln(0.03818/0.09479)

W=-5.065KJ

c)

In conclusion, Heat energy

Q=-W

Q =5.065 KJ

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Answer:

A surface wave is a wave that travels on the crust of the earth after an earthquake; surface waves cause the destruction of an earthquake

Explanation:

A surface wave is a wave that travels on the crust of the earth after an earthquake; surface waves cause the destruction of an earthquake

Based on the length of the spring and the mass of the block, the distance the 4.0 kg block can fall before a reversal in direction is 32 cm.

Because energy is conserved, the distance the block can drop can be found as:

Mass x gravity x distance = (1 / 2) x spring constant x distance ²

Spring constant:

= (Mass x gravity)  / distance

= (3 x 9.8) / 12

= 2.45 cm

Distance is:

Mass x gravity x distance = (1 / 2) x spring constant x distance ²

distance = (2 x Mass x gravity) / spring constant

= (2 x 4 x 9.8) / 2.45

= 32 cm

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Answer:

Jupiter is by far the largest.

G = K M / R^2 = K C M     since R is given as 5E5 km

G = gravitational attraction

Answer:

It add strength to the metal, along with other enhanced chemical properties. Hardness, machinability, and corrosion resistance are other properties that can be added or enhanced by creating an alloy.

I hope my answer helps you.

Answer:

2 conduction

Explanation:

Answer:

2) conduction

Explanation:

Answer:

B

Explanation:

Answer:

B

Explanation:

A momentum does not stop it is conserved

C momentum is a vector quantity while energy is a scalar there is a difference

D momentum can't be formed a new it is still conserved

Answer:

A.

Explanation:

The answer should be A.

i apologize if it is incorrect-

I hope it helps! Have a great day!

Anygays-

Answer:

G M m / R^2      attraction of Jupiter to sun where m is mass of Jupiter

m V^2 / R      centripetal force acting on Jupiter

R = G M / V^2

The radius would be unchanged, and its orbit would be unchanged

The given is:Mass – 2000 kg

The given is:Mass – 2000 kgInstantaneous speed – 10 meter per second

Step: 1K.E= 1/2mv^2

Where, K.E – Kinetic energy in joules:

m – Mass in kg

  v – Velocity or speed in meter per second

From the give,

m = 2000 kg

v = 10 m/s

Equation (1) becomes,

K.E= 1/2 (2000) (10)^2

= (0.5)(2000)(100)

= 100000

K.E = 100,000 Joules

The kinetic energy is 100,000 Joules, if a roller coaster of mass 2000 kg is rolling down a track with an instantaneous speed 10 m/s.

Answer:

10 ohms

Explanation:

V = IR

2 v is the drop in the battery

2 = .2 R

R = 10 ohms

Answer:

Composition of hydrogen and helium is common in all outer planets. The inner planets are marked by features such as small size which is of rocks. On other hand, outer planets are characterized by features such as huge size due to composition of hydrogen and helium gases.

Explanation:

Answer:

They are mostly made up of hydrogen and helium.

Explanation:

The graph in the question that represents an object with constant acceleration is : Graph A

Acceleration is the change in velocity with time. For graph A the acceleration remained constant as the velocity of the object did not change with the change in time. As the time changes from 4 to 9 seconds the velocity of the object remained at 40 before decelerating to 0.  This shows that the acceleration of the object was constant.

Hence we can conclude that The graph that shows an object with constant acceleration is : Graph A

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Explanation:

Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep.

1. Using Strong Permanent. 2. increasing the current. 3. Decreasing the space between Magnets

Explanation:

Brainiest

The changes that make the motor stronger will be using strong permanent magnets, increasing the current, and decreasing the space between magnets.

An electric motor is a mechanism that turns electricity into mechanical energy.

The interaction between the motor's magnetic field and electric current in a wire winding generates force in the form of torque imparted to the motor's shaft in most electric motors.

An electric generator is physically equivalent to an electric motor, but it converts mechanical energy into electrical energy using a reversed flow of power.

When string magnets are used, a strong flux is produced, and the motor becomes more powerful. Internal flux has a significant impact on coil strength.

Increasing current results in greater power. In the same way, shortening the distance between magnets makes the motor stronger by increasing flux and torque.]

Hence the changes that make the motor stronger will be using strong permanent magnets, increasing the current, and decreasing the space between magnets.

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Answer: When a ray of light travels from an optically denser medium to an optically rarer medium and is incident at an angle greater than the critical angle for the two media, the ray totally reflects back into the medium, obeying the laws of reflection. This phenomenon is known as the total internal reflection.

Explanation:

Answer:

Juno

Explanation:

The NASA spacecraft Juno (2016) is the one that was studying Jupiter more in detail.

I hope it helps! Have a great day!

Anygays-

Answer:

3 m/s^2

Explanation:

Simply   F = ma

            15 = 5 a

             a = 3 m/s^2