50 points physics question (multiple choice) Will give brainliest!

Answer:

The impulse experienced by the object equals the change in momentum of the object. In equation form, F • t = m • Δ v. In a collision, objects experience an impulse; the impulse causes and is equal to the change in momentum.

Explanation:

When A 0.025 kg piece of clay is thrown into a wall and has a speed of 9 m/s before it strikes the wall then change in momentum 22.5 kg.m/s² is and impulse is 0.225 Ns.

Momentum is defined as product of mass and velocity of the body. It is denoted by letter p and it is expressed in kg.m/s.

Mathematically p = mv.

it discuss the moment of the body. body having zero mass or velocity has zero momentum.

The dimensions of the momentum is [M¹ L¹ T⁻¹].

Given,

mass of the clay = 0.025 Kg

Speed of the clay = 9m/s

The momentum of clay is P = mv = 0.025×9 =0.225 kg.m/s

In this problem a piece of clay having mass 0.025 Kg, velocity of clay is 9m/s.

By using formula,

change in momentum of the clay = dp/dt

We must know about change in time in order to calculate change in momentum with respect to time.

Consider that the change in momentum is 0.01s.

dp/dt = p₂-p₁/t₂-t₁ = 0- 0.225/0.01 = 22.5 kg.m/s²

Impulse = dp/dt×Δt = 22.5×0.01 = 0.225 Ns

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Answer:

See below ~

Explanation:

A decrease in the ice caps causes a(n) increase in the absorption of sunlight. This cause the global temperature to rise causing more ice caps to melt. As more ice caps melt, the temperature rises. This is an example of a negative feedback loop.

A decrease in the ice caps causes a(n) increase in the absorption of sunlight. This causes the global temperature to rise causing more ice caps to melt. As more ice caps melt, the temperature rises. This is an example of a negative feedback loop.

The options are followed by

Answer:

Second choice

Explanation:

I suppose ME is the same as POTENTIAL energy

ME = mgh =  70 * 10 * 12 = 8400j

  Half way down,   4200 j is converted to Kinetic Energy

       1/2 m v^2 = 4200

       1/2 (70)  v^2 = 4200       v = 10.95 m/s

  Just before impact ALL of the 8400 j is now KE
      1/2 (70)v^2 = 8400          v = 15.49 m/s

The gravitational force is always equal to the mass times the acceleration due to the gravitational force:

 ⇒ In this case

Let's calculate:

 [tex]Gravitational_.Force = 1kg*9.8m/s^2=9.8N[/tex]

Answer: 9.8 N

Hope that helps!

Answer:

[tex] \: [/tex]

Explanation:

Before converting , Let's recall this :

[tex] \: [/tex]

Now, Let's Convert it :

[tex] \\ \longrightarrow \qquad \sf \: 54km / hr \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1km}{1hr} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1000m}{3600s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54000 m}{3600s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{540\cancel{0 }\cancel{0} m}{36 \cancel{0 }\cancel{0}s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{540 m}{36s} \\ [/tex]

[tex] \\ \longrightarrow \qquad \frak{\pmb{ 15m /s}} \\ [/tex]

Answer:

mars and jupiterrr

Explanation:

ty for all ur help love u

At high speeds, gas vibrates and moves freely. The liquid vibrates, moves about, and slides past one another. Solids vibrate (jiggle) but do not move from one location to another.

In gasoline-powered vehicles, most of the fuel's energy is lost in the engine, primarily as heat. Smaller amounts of energy are lost through engine friction, pumping air into and out of the engine, and combustion inefficiency.

The frequency of the ultraviolet light given that its wavelength is 100 nm is 3×10¹⁵ Hz

The frequency of the light can obtain as illustrated below:

v = λf

3×10⁸ = 100×10¯⁹ × f

Divide both side by 100×10¯⁹

f = 3×10⁸ / 100×10¯⁹

f = 3×10¹⁵ Hz

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Explanation:

GIVEN :

Work done(W) = 40 J

Time(t) = 4 s

Power (P) = ?

We know that:

W = P×t

Therefore,

P= W/t

=40/4

= 10 W

Hope it helps

Answer:

Rocket 4

Explanation:

since it has the smallest mass it is going to the bigger acceleration.

Answer:

C

Explanation:

In theory, rocket 4 has the least mass and highest force output in comparison.

An electromagnetic AM-band radio wave could have a wavelength of  186.6 meters.

Wavelength is the distance between two consecutive points on a wave that are in phase, meaning they are at the same position in their respective cycles. It is usually denoted by the Greek letter lambda (λ) and is measured in units of length, such as meters, centimeters, or nanometers.

The relationship between wavelength, frequency, and speed of a wave is given by the formula:

wavelength = speed / frequency

where "speed" refers to the speed of the wave through a medium, and "frequency" refers to the number of cycles per second.

The AM radio band frequency ranges from 535 kHz to 1605 kHz. To find the wavelength of the AM radio wave, we can use the formula:

wavelength = speed of light / frequency

where the speed of light is approximately 299,792,458 meters per second.

Let's take the highest frequency in the AM radio band, which is 1605 kHz. We need to convert this frequency to Hertz (Hz) by multiplying it by 1000 since kHz is 10^3 times larger than Hz.

1605 kHz = 1605 x 1000 Hz = 1,605,000 Hz

Now, we can calculate the wavelength of the AM radio wave using the formula:

wavelength = 299,792,458 / 1,605,000

wavelength ≈ 186.6 meters

Therefore, an electromagnetic AM-band radio wave could have a wavelength of approximately 186.6 meters.

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The energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.

The energy supplied by the lamp is calculated as follows;

E = Pt

E = IVt

where;

E = 0.4 x 12 x 300

E = 1,440 J

Thus, the energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.

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Answer:

Texture is how something feels.

The product label which Mateo should place in the marked cell is that it: B. provides electrical energy.

A product label can be defined as a paper-document with specific information about the chemical elements, nutrients, and other chemical compounds that are present in a product and its general use or function.

In this scenario, the product label which Mateo should place in the marked cell shown in the image attached below is that, this product was designed and developed to provide electrical energy, based on the electrical symbol for battery.

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Answer:

more quickly on a hot day

Explanation:

Answer:

Expect a broken leg or two, but you'll live, Some part of your body must absorb the impact, but head injury is the primary cause of death in falls.

Explanation:

Answer:

an instrument for measuring the density of liquids.

Explanation:

Answer:

A

Explanation:

208+4=212

84+2=86

The correct answer is A

(a)The required speed for take off will be 24.49 m/sec.

(b)The minimum length must the runway have 193 m.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its SI unit is m/sec.

(a)The required speed for take off will be 24.49 m/sec.

From the Newtons third equation of motion;

[tex]\rm v^2 = u^2+2as \\\\ v=0+2 \times 2 \times 150 \\\\ v=\sqrt{600}\\\\ v=24.49 \ m/sec[/tex]

Hence, the required speed for take off will be 24.49 m/sec.

(b)The minimum length must the runway have 193 m.

From the Newtons third equation of motion;

[tex]\rm v^2 = u^2+2as \\\\ (27.78)^2 = 0+2\times 2 s \\\\\ s=192.93 \ m[/tex]

Hence, the minimum length must the runway have 193 m.

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Answer: neutrinos

Explanation:

The amount of light collected by Magellan telescope with respect to human eyes is 1.13 x 10⁶  times that of human pupil.

The amount of light that will pass through the given area of human pupil when maximally dilated is calculated as follows;

A = πd²/4

A = π(0.01)²/4

A = 2.5 x 10⁻⁵π m²

A = πd²/4

A = π(6)²/4

A = 9π m²

with respect to human eyes = ( 9π m²)/(2.5 x 10⁻⁵π m²)

= 1.13 x 10⁶  x human pupil

Thus, the amount of light collected by Magellan telescope with respect to human eyes is 1.13 x 10⁶  times that of human pupil.

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The statement that is not true about in

terms of what to consider when judging eye witness accounts is the type of crime and how the witness saw the incident.

Judgement is a decree, or decision or conclusion on a subject matter when there is an offence or someone did wat is wrong . It can be to vindicate and to punish for a crime.

Therefore, The statement that is not true about in terms of what to consider when judging eye witness accounts is the type of crime and how the witness saw the incident

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Answer:

b i think

Explanation:

The direction of force refers to the path along which the force acts. The plane of application of force, on the other hand, is the surface or area where the force is applied

The direction of force refers to the path along which the force acts. It is the straight line in which the force is being applied. For example, if you push a box on the ground, the direction of force is the line of action of the force vector that points in the direction of the push.

The plane of application of force is the surface or area where the force is applied.

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Answer: A Because that is local I mean it is confined to a city at least i think so

Answer:

Option 3

Explanation:

All of the mentioned options are mitigation solutions. But, the question has clearly asked for local solutions, which means it has the possibility or feasibility to take place in every neighborhood no matter where you are.

The option which correctly gives this is :

The speed of an electromagnetic wave traveling through the air will be 2.9 ×10⁸ m/sec.

The refractive index of a substance also known as the refraction index or index of refraction is a dimensionless quantity that specifies how quickly light passes through it in optics.

The refractive index is found as;

[tex]\rm n= \frac{c}{v} \\\\ 1.000293=\frac{3 \times 10^8}{v} \\\\ v=2.9 \times 10^8 \ m/sec[/tex]

Hence, the speed of an electromagnetic wave traveling through the air will be 2.9 ×10⁸ m/sec.

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Water can rise from the roots to the tops of trees due to capillary action. The correct option is A.

It is the phenomenon by which the liquid rises or falls in a very small diameter tube.

In plants. its roots have very thin diameter tubes which are not visible to the eye. But the water reached to the plants through these tube to every single part of the plant i.e. from root to the fruits.

So, water can rise from the roots to the tops of trees due to capillary action.

Thus, the correct option is A.

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Answer:

0.1667Hz

Explanation:

by explanation frequency is given by 1/time

after carrying out the calculation of time we can easily get frequency.

time=speed/distance

=18/3

=6s

but frequency=1/time

hence=1/6

=0.1667hertz