4. How much force is required to accelerate a 5 kg mass at 2 m/s??

Answer:

Any scientific investigation in its simplest form involves collecting information, while a controlled experiment is a tightly controlled investigation that tests a hypothesis.

Explanation:

All the scientific investigations start with a particular question. The question decides what type of investigation should research take. A controlled experiment is an investigation which allows a particular variable to change and all other variable controlled to remain constant to see the effect on dependent variable to test a particular hypothesis while other types of investigations are used to increase the knowledge or information about the particular research subject.

Answer:

student's tie cause if the tie is too tight then no need of hanging to fan.

An example of an object in a classroom that has a loose end could be a frayed electrical cord on a piece of electronic equipment such as a computer or a lamp.

A classroom is an educational circumstance in an academic institution where important personalities are developed and career-building skills are learned.

A frayed electrical cord on a piece of electronic equipment, such as a computer or a lamp, is an example of a loose end in a classroom.

Over time, the cord can become worn or damaged and the outer protective layer can start to come apart, leaving exposed wires and a "loose end" that can be potentially dangerous if not addressed.

This loose end can become a safety hazard as it increases the risk of electrical shock or fire. It is important to address any loose or frayed cords as soon as they are noticed and either repair or replace the equipment to ensure a safe learning environment for students and teachers alike.

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Answer:

Explanation:

Formula

KE = 1/2 m v^3

Givens

m  = 54 kg

v = 30 m/s

Solution

KE = 1/2 54 * 30^2

KE = 1/2 54 * 900

KE = 27 * 900

KE = 24300 Joules

Answer:

D. 100 J

Explanation:

Given

Mass (m) = 2 kg

Height (h) = 5 m

Acceleration due to gravity (g) = 10 m/s²

Now

Work done(W)

= m * g * h

= 2 * 10 * 5

= 100 Joule

Hope it will help :)❤

The work done in uplifting a brick having a mass of 2kg along with a height of 5m above ground level would be:

D). 100 J

Given that,

Mass of the brick [tex]= 2Kg[/tex]

Height of the brick [tex]= 5m[/tex]

As we know,

Work Done (W) [tex]= mgh[/tex]

where

m = Mass

g = Acceleration due to gravity

h = height

A.T.Q.

By substituting the given values, we get;

[tex]Work Done (W)[/tex] [tex]= 2[/tex] × [tex]10[/tex] × [tex]5[/tex]            (taking [tex]g = 10 m/s^2[/tex])

[tex]= 100 J[/tex]

Thus, the work done is 100 J and hence, option D is the correct answer.

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Answer:

new moon phase

Explanation:

During the new moon phase, the moon is not visible. Sometimes it can be detected by noting the visible absence of the stars that it blocks. Additionally, during new moon, sometimes enough light is reflected off the surface of the Earth that the disk of the moon is faintly visible.

Answer:

Everyone knows new moon is NOT visible

Explanation:

If you're doing an assignment of the moons, I hope this helps.

And there you have it! :]

Also, a new moon is the only phase that is not visible, It's not even visible during the day time.

that means the parameter over another

Explanation:

that is when you say a parameter is inversely proportional to another it means what ever happens to the first parameter the opposite happens to the other parameter

Answer:

The answer would be Front Line

The base line, service line, and the side lines are the part of the tennis court however front line is not a part of the tennis court. Thus, the correct option is D.

A tennis court is a 78ft long court, with a service line of 21ft from the net. The courts for singles tennis matches are 27ft wide in dimension, while the doubles matches courts are 36ft wide. The total playing area in tennis for a singles court is 2,106ft² and 2,808ft² for a doubles court.

The basic and important parts of a tennis court in both singles and doubles are the baseline, the center mark, the sidelines, the service lines, and the service boxes. The baseline is the boundary line at the ends of the tennis court, and the sidelines are the lines which mark the boundary line between in-bounds and out-of-bounds for both singles and doubles play.

Therefore, the correct option is D.

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Answer:

The definition of a light year is the distance a photon will travel in a year in a vaccume, like space.

Answer:

description

Explanation:

Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point.

This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.

Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.

A reference point refers to a location or physical object from which the motion (movement) of another physical object or body can be determined.

For example, a point on a map is considered to be a reference point because it represents the starting point of an object or person in motion.

If the reference point changes, the description of position changes, but the actual position does not change.

Answer:

description

Explanation:

Hope this helps

Answer:

Velocity

Explanation:

Answer:

c. 0.80

Explanation:

they will choose the path that has not resistance

Answer:

410 nanometers

Violet light is electromagnetic radiation with wavelengths of 410 nanometers and red light has a wavelength of 680 nanometers. The nanometer is a unit of distance in the metric scale and is abbreviated as nm. One nanometer (nm) equals one thousand millionths of a meter (m) or 1 nm = 10-9 m.

Explanation:

Hope it helps! Correct me if I am wrong :>

Answer:

Using my searching skills, I have came to the conclusion that the most energetic violet light wavelength is 380nm.

Answer:

m=F/a

= 44/4

 = 11 m

Explanation:

Just use the formula F=ma

Answer:

Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, or electron, was thus the source of the word 'electricity'.

Answer:

Reunirán $270.

Explanation:

Para pagar la entrada al circo y comprar palomitas Daniela y María van a cooperar con $65.50 cada una. Entonces para calcular el dinero que van a reunir entre ambas debes sumar lo que aporta cada una:

$65.50 + $65.50= $131

Por otro lado, Francisco y Javier van a cooperar con $69.50 cada uno. De igual manera, para calcular el dinero que van a reunir entre ambos debes sumar lo que aporta cada uno:

$69.50 + $69.50= $139

Para conocer el dinero total recaudado, debes sumar lo que aportan tanto ellas como ellos. Esto es:

$131 + $139= $270

Reunirán $270.

Answer:

a = -1.2 m/s^2

Explanation:

Vi = 12 m/s

Vf = 0 m/s

t = 10 s

Plug those values into the following equation:

Vf = Vi + at

0 = 12 + 10a

---> a = -1.2 m/s^2

Answer:

a) ray horizontal and ray leaves his feet

b) The normal line respect to which the angles are measured,

c) The angle x is the reflected angle

d) virtual image,  right image

Explanation:

a) To complete the rays, you must draw a horizontal ray at the height of the man's head, this ray touches the mirror perpendicularly, therefore it bounces in the same direction.

The other ray leaves his feet and touches the mirror at one point, it is reflected with the same angle, by the law of reflection and reaches the eyes of man, the brain creates an extension of this ray and at the point of the floor creates the image point.

b) The normal line is a line perpendicular to the surface with respect to which the angles are measured,

c) The angle x is the reflected angle, which is equal to the incident angle according to the law of reflection

d) The image is formed by the prolongation of the rays of light, therefore it is a virtual image and as it has the same direction of the man it is a right image

Answer:

2 x 10^-8

Explanation:

the formula of wavelength is

the speed divided by frequency

so you have the speed given = 3.0x10^8m/s

and frequency = 1.5×10^16 Hz

so wavelength = 3.0x10^8m/s / 1.5x10^16 Hz

Answer:

r_eq = 320 Ω

Explanation:

It is asked to find the equivalent resistance of a series circuit formed by two resistors r₁ and r₂

           r_eq = r₁ + r₂

           r_eq = 100 + 220

           r_eq = 320 Ω

with this value we can find the current that circulates through the circuit

           V = r_eq i

            i = V / r_eq

            i = 6.4 / 320

            i = 0.02 A

Answer:

d = 40 m

Explanation:

Given that,

Force, F = 4000 N

Mass of a car, m = 800 kg

Initial velocity, u = 0 (at rest)

Final velocity, v = 20 m/s

We need to find the distance traveled. Force acting on a car is given by :

F = ma

Where

a is the acceleration of the car.

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{4000}{800}\\\\a=5\ m/s^2[/tex]

Let it has traveled d distance. Using third equation of motion.

[tex]v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{(20)^2-(0)^2}{2\times 5}\\\\d=40\ m[/tex]

So, the required distance is equal to 40 m.

Answer:

20V

Explanation:

V = intensity * resistance

V = 2 * 10 = 20

Answer:

Explanation:

For answer please see the image attached .

The mirror reflects the light while the lens allows the light to pass through it. The lens and mirror are positioned parallel and opposite each other.

The basic difference between the lens and mirror is that mirror reflects the light while the lens allows the light to pass through it. Both are optical instruments but their laws are different.

The lens and mirror are positioned parallel and opposite each other. From the above conditions, it is observed that first, the light gets passed through the lens.

After it passes through the light got reflected. As the light reflected the mirror it again passes through the lens and converts the distributed or parallel lights into a single beam of light.

The single beam of light is known as the spotlight.

Such types of design for a spotlight use a lens and a mirror, combined with a gas-discharge lamp, to project a powerful parallel beam of light.

Hence the lens and mirror are positioned parallel and opposite to each other.

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Answer:

Answer. Pressure under water is given by the sum of atmospheric pressure and pressure of fluid. Thus, depth in water at which pressure will be equal to twice the atmospheric pressure is 10.2 m.

Explanation:

Answer:

Even inside their ships, astronauts are exposed to a slow drizzle of cosmic rays coming right through the hull. The particles penetrate flesh, damaging tissue at the microscopic level. One possible side-effect is broken DNA, which can, over the course of time, cause cancer, cataracts and other maladies.

Answer:

A south pole of one magnet can approach the north pole of another. The magnetic fields are aligned. This makes an attractive force between the two magnets. The farther apart they are, the higher their potential energy.