I need to know what the answer is

Answer:

move at the same velocity

Explanation:

Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Answer:

move at the same velocity

Explanation:

Given the force applied, the magnitude of the force of friction acting on the mass is 2.5 Newton

Given the data in the question;

To determine the magnitude of the force of friction acting on the mass,

From Newton's laws of motion

[tex]F = m\ *\ a[/tex]

Where F is the force applied, m is the mass of the object and a is the acceleration of the object.

Now, we know that Kinetic Friction is always opposite of the direction of motion.

So, in the question, the force applied overcomes the friction to produce an acceleration of [tex]1.5 m/s^2[/tex]

Hence

[tex]F = F_k + ma[/tex]

Where [tex]F_k[/tex] is the kinetic friction

Now, we substitute our given values into the equation

[tex]10N = F_k +\ ( 5kg\ *\ 1.5m/s^2)\\\\10N = F_k +\ 7.5kg.m/s^2[/tex]

We know that, A newton is defined as [tex]1 kg.m/s^2[/tex]

Hence;

[tex]10N = F_k\ *\ 7.5N\\\\F_k = 10N \ -\ 7.5N\\\\F_k = 2.5N[/tex]

Therefore, given the force applied, the magnitude of the force of friction acting on the mass is 2.5 Newton.

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Answer:

the answer is the first one.

Explanation:

one way to find out is if you look at the other equations they are mixed matched. For an example a=d/t should be s= d/t.

Answer:

a

Explanation:

i did it

The generator was  754.6 meter far above the ground  when the potential energy associated with it was  9.17 × 10⁸ J.

Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.

The gravitational potential energy of an item, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are examples of common types of potential energy.

Mass of the equipment : M = 1.24 × 10⁵ kg.

The potential energy associated with it was: E = 9.17 × 10⁸ J.

Acceleration due to gravity: g = 9.8 m/s².

Hence, The height of the equipment =  9.17 × 10⁸ J ÷ ( 1.24 × 10⁵ kg×9.8 m/s²)

= 754.6 meter.

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The factor increase in the relativistic energy  is 0.129.

The relativistic kinetic energy of the spacecraft is determined as follows;

[tex]K = (\frac{1}{\sqrt{1- \frac{v^2}{c^2} } } )mc^2[/tex]

where;

At 0.255 speed of light, the relativistic kinetic energy is calculated as follows;

[tex]K = (\frac{1}{\sqrt{1- \frac{(0.255c)^2}{c^2} } } )mc^2\\\\K = (\frac{1}{\sqrt{1- \frac{0.065c^2}{c^2} } } )mc^2\\\\K = 1.034mc^2[/tex]

When the speed doubles, v = 2(0.255c)

[tex]K = (\frac{1}{\sqrt{1- \frac{(2 \times 0.255c)^2}{c^2} } } )mc^2\\\\K = (\frac{1}{\sqrt{1- \frac{0.261c^2}{c^2} } } )mc^2\\\\K = 1.163mc^2[/tex]

ΔK = 1.163mc² - 1.034mc²

ΔK = 0.129mc²

Thus, the factor increase in the relativistic energy  is 0.129.

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Answer: B

Explanation:

You can use the conservation of momentum, under the assumption that no mass was lost when the collision occurred. The initial momentum of the system must equal the final momentum of the system. Our system is the region including, and only including, the satellite and the space debris. Classical momentum is defined as the product of mass and velocity:

[tex]p_i=p_f[/tex]

[tex]m_1v_1_i+m_2v_2_i=m_1v_1_f+m_2v_2_f[/tex]

Due to mass 1 equaling mass 2, we can factor these quantities out:

[tex]m(v_1_i+v_2_i)=m(v_1_f+v_2_f)[/tex]

Cancel the mass term on both sides to get:

[tex]v_1_i+v_2_i=v_1_f+v_2_f[/tex]

We have the initial and final velocities for everything besides the final velocity of the satellite. Plug everything in:

[tex]3700m/s+6000m/s=v_1_f+3700m/s[/tex]

[tex]v_1_f=6000m/s[/tex]

The efficiency of a carnot engine with absorb temperature and exhaust temperature is 13%. The correct option is A.

The efficiency is defined as the work done by the engine divided by the heat supplied.

So, efficiency η = 1 - T₁/T₂

Where T₁ is the lower temperature and T₂ is the higher temperature.

A Carnot engine absorbs heat at a temperature of 127 °C and exhaust heat at a temperature of 77 °C

Substitute the value into the expression , we get

η = 1 -(77+273)  / (127+273) x 100 %

η = 12.5 %

or

η = 13 %

Thus, the efficiency of the carnot engine is 13%.

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Answer:

Explanation:

frequency = 10/8 = 1.125 Hz

Answer:

It's A it is correct trust me and no I didn't copy the other person I just read the answers.

Hope this helps:)

Explanation:

The tension in the wire is caused by the elastic collision between the balls and the magnitude of this tension is determined as 18.81 N.

The speed of the balls after the collision is determined by applying the principle of conservation of linear momentum as shown below.

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

9.2(0) + 2.8(3.5) = 9.2v₁ + 2.8(v₂)

9.8 = 9.2v₁ + 2.8v₂   -----(1)

u₁ + v₁ = u₂ + v₂

0 + v₁ = 3.5 + v₂

v₂ = v₁ - 3.5  ---(2)

Substitute (2) into (1)

9.8 = 9.2v₁ + 2.8(v₁ - 3.5)

9.8 = 9.2v₁ + 2.8v₁ - 9.8

19.6 = 12v₁

v₁ = 19.6/12

v₁ = 1.63 m/s

v = √T/μ

v² = T/μ

T = v²μ

where;

μ is mass per unit length of the wire = 9.2/1.3 = 7.08 kg/m

T = (1.63²) x 7.08

T = 18.81 N

Thus, the tension in the wire just after collision is 18.81 N.

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The change in the internal energy of the system is 110 kJ.

Internal energy is defined as the energy associated with the random, disorder motions of molecules.

calculate the change in internal energy, we apply the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The change in the internal energy of the system is 110 kJ.

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Answer:

110.0kJ

Explanation:

The following solution may contain one or more values that are different from the problem provided to you, however, the steps to solve the problem are the same.

.The internal energy (E) of a system can change as heat (q) flows into or out of the system, or work (w) is done on or by the system. The following equation represents the relationship.

ΔE=q+w

In this question, heat is absorbed by the system, so it has a positive sign. Work is done by the system, so it has a negative sign.

ΔE=(155.0 kJ)+(−45.0 kJ)=110.0 kJ

Answer:

An electromagnet

Explanation:

The rest of the answers

adding more cells

As currents increases, the magnetic fuel strengths increases.

They both have north and south magnetic poles.

A current will be induced in the coil of wire.

Answer:

Number three is The current increases as the magnet's movement remains the same

Explanation:

Answer:

Explanation:

Let the required velocity be V   at angle θ with the horizontal . Let time taken in the whole process be t

horizontal component = v cosθ

It will cover .25 m at this velocity

vertical component = v sinθ

It will cover .45 m with this initial velocity and with deceleration g .

v cosθ t = .25

.45 =v sinθ t - 1/2 g t²

putting the values of t from above

.45 = .25 tanθ - g .25² / 2 v² cos²θ

B ) putting the values of θ

.45 = .25 tan63 - 9.8 x .25² / 2 v² cos² 63

.45 = .49 - 1.53 / v²

1.53 / v² = .04

v² = 38.25

v = 6.18 m /s

time taken to cover distance of .25 m

t = .25 / 6.18 cos63 = .089 s

during this period , vertical displacement

= 6.18 sin 63 x .089  - 1/2 x 9.8 x .089²

= .4895 - .04  = .45 m which is consistence with given height .

Answer:

25 kilometers an hour.

Explanation: Since there is 100 kilometers, you dived it by four hours and you get the kilometers per hour.

Answer:

25 kmph

Explanation:

100 divided by 4 is 25

hope it helps

Answer:

The answer is B.

Explanation:

A Clan is usually just one family, but can be multiple families that are related. They were usually very close knit. Sometimes a clan is also a group of people with a common interest.

Answer:

it means absorption by a presynaptic nerve ending of a neurotransmitter that it has secreted.

Explanation: I hoped that helped please leave a 5 rate and thanks. Have a great day .

The work done by the object is 831.69 J.

Work can be defined as the product of mass and distance.

To calculate the work done by the object, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The work done by the object is 831.69 J.

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Answer:

C

Explanation:

i think its C, not too sure

Answer:

0.5 m/s²

Explanation:

F=ma
F is force
m is mass
a is acceleration

F=ma
5 =  10 x a
a = 5/10
a = 0.5 m/s²

gravitational force is inversely proportional to the square of the separation distance between the two interacting objects

Gravitational force is inversly proportional to the square of the distance. Option B is correct.

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

[tex]\rm F=G\frac{mM}{R^2}[/tex]

Gravitational force is inversly proportional to the square of the distance.

Hence option B is correct.

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The pressure of the cube that exerts the most pressure while resting on a floor is mathematically given as

P=16.6pascal, Option D is correct

Generally, the equation for the Pressure   is mathematically given as

P=force/Area

Therefore, In considering the one with the most pressure we look at the one with the most force/Area

In conclusion, the one with the most Force/Area is a 25 N cube with 1.5 m sides

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Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.

Answer:

Acceleration = 4 m/s

Explanation:

Acceleration = force divided by mass

So;

a = 200 ÷ 50 = 4

The final velocity and the loss of kinetic energy is mathematically given as

Question Parameters:

Generally, the equation for the conservation of momentum   is mathematically given as

m1v1 = m2v2

(7500 + 4000) * vf = 4000 * 0.250

vf = 0.087 m/s

b)

Generally, the equation for the loss of kinetic energy  is mathematically given as

loss in kinetic energy = initial kinetic energy - final kinetic energy

Therefore

L-K.E= 0.50 * 4000 * 0.25^2 - 0.50 * (4000 + 7500) * 0.087^2

L-K.E= 81.5 J

In conclusion, the final velocity and the loss of kinetic energy

vf = 0.087 m/s

L-K.E= 81.5 J

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This answer is true but in other contexts it can be false

Answer:

13 g

Explanation:

Gold-198 has a half-life of approximately 3 days. If a 100 g sample of gold-198 decays for 9 days, approximately how much gold-198 remains in the sample?

13 g

The collision is elastic:

In all elastic collisions of that type (unidirectional) the velocity of approach equals the velocity of separation - the collision is elastic even for different masses

e = relative velocity after / relative velocity before

e = 1 for elastic collisions