Pls helpppppppppppppppp

Answer: 14.41*10^2 m/s

Explanation:

let, V be the escape velocity of the moon.

M be the mass of the earth.

r be the distance between the moon and the earth.

G be the universal gravitational constant.

And G = 6.67428*10^-11 m^3kg^-1 s^-2

here, given in the question that

The earth has a mass of 5.98*10^24 kg.

so, M = 5.98*10^24 kg.

And the distance from the earth to the moon is 3.84*10^8 m.

so, r = 3.84*10^8 m.

now, we know,

V = √2GM/r

V = √(2 * 6.67428*10^-11* 5.98 * 10^24 )/ 3.84*10^8

V = √79.82*10^13/3.84*10^8

V = √20.78*10^5

V = 14.41*10^2 m/s

0.116 rad/s is the angular speed in radians, during the time interval from 0.75 s to 14.2 s

ω=Δθ/Δt

Δθ= 90° = 1.571rad

Δt=13.45

ω=1.571/13.45

ω=0.116 rad/s

The rate of change of angular displacement, or the angle a body travels along a circular path, is the definition of angular speed. Calculating angular speed involves dividing the quantity of rotations or revolutions made by a body by the amount of time required. Omega is a Greek letter that represents angular speed. The SI's angular speed unit is rad/s.

As is well known, angular speed is determined by dividing the rate of displacement change by the time. As a result, the angular speed equation is = /t. Despite the procedure stated above, a different and more well-liked formula is used to determine angular speed in competitive testing. As ω = θ/t

To know more about angular speed visit : brainly.com/question/16407861

#SPJ9

The time (in seconds) it will take the Narwhal to accelerate from rest down a 30 meter long ravine is 5.2 s

We know from equations of motion that distance, acceleration and time are related according to the following formula:

s = ut + ½at²

Where

With the above formula, we can obtain the time as follow:

s = ut + 1/2at²

30 = (0 × t) + (½ × 2.2 × t²)

30 = 0 + (1.1 × t²)

30 = 1.1 × t²

Divide both side by 1.1

t² = 30 / 1.1

Take the square root of both side

t = √(30 / 1.1)

t = 5.2 s

Thus, the time taken is 5.2 s

Learn more about time:

https://brainly.com/question/14195937

#SPJ1

The net force on the electron is F = 1X10-13 N.

The mass of the electron is m = 1X10-30 kg.

The distance covered by an electron is S = 10 cm.

The acceleration of an electron can be calculated as:

F = ma

a = F/m

Substitute the values in the above expression.

[tex]a = (\frac{1 * 10^{-13}N }{1* 10^{-30kg} } ) \\[/tex]

a = [tex]1*[/tex][tex]10^{-17} m/s^{2}[/tex]

Thus. the acceleration of the electron is. [tex]a = 1*10^{-17} m/s^{2}[/tex]

The expression of time taken by the electron is given by,

S = ut + [tex]\frac{1}{2} at^{2}[/tex]

Here, u is the electron's initial velocity, whose value is zero because the electron is initially at rest.

Substitute the values in the above expression.

(10cm x 1m/100cm) = 0 x t + 1/2 x (1 x [tex]10^{17}[/tex] m/s²) x t²

(0.1m) x 2 = (1 x [tex]10^{17}[/tex] m/s²)x t²

[tex]t = \sqrt{\frac{0.2m}{(1*10^{17} m/s^{2} )} }[/tex]

t = 1.414 x [tex]10^{-9}[/tex]s

Thus, the time taken by the electrons to be accelerated from rest is t = 1.414 x [tex]10^{-9}[/tex]s

Electrons are accelerated from rest by a potential difference of V volts. The speed of individual electrons in metal wires is typically millions of kilometers per hour. In contrast, drift velocities are typically only a few meters per hour, while signal velocities are 100 million to 1 billion kilometers per hour.

Learn more about The acceleration here:-https://brainly.com/question/460763

#SPJ1

The combination of a force's constituent acting inside the displacement's direction as well as its magnitude would be known as the work done mostly via force.

1) Work is done when an applied force produces mobility in a body.

Mathematically , Work = Force x displacement

2) Unit for energy is Joule.

3) Energy can be calculated by such as:

Work = F s

750 x 100 = 75000J would be transferred by engine if car moved a distance of 100m.

4)For the case of Rehana : 200 cm converted to 2m .

again using same concept , W=FS

50 x 2=100J of work done in raising the object.

Energy consumed = 700 J

Distance (Displacement) = 10 m

7) We know work done is also a type of energy which tells the energy consumed by anything in order to move a distance, We know

⇒ Work done = Force × Displacement

⇒ 700 = F × 10

⇒ F = 70 newton

Hence, The force exerted by the person as walked the distance is 70 newton.

6) For the hifza case:- 200N will take more height because it is lighter than 350N so we can do it upward and downward as it is lighter and the energy used is 1000J .

To understand more about concepts of work & energy

https://brainly.com/question/17290830

#SPJ1

Answer:

yes

Explanation:

Because doubting is thinking something is

wrong

Statement is accurate C. You would weight more on planet A because the distance between you and the planet's of center of gravity would be smaller.

You would weigh less on planet A due to a closer proximity to the planet's center of gravity, which is the statement that best represents your weight on each planet.

According to Newton's rule of universal gravitation, "the force of gravity between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distances between them,"

Given that weight is a function of both mass and gravity, objects on planets with stronger gravitational pull will have heavier masses.

The weight will be lighter since there is less space between the individual and the planet's center.

To know more about masses of planet visit:-

https://brainly.com/question/13851553

#SPJ1

The greatest energy or the greatest extension from its equilibrium positions is equal to 0.12 J.

Mechanical energy is the sum of potential energy and kinetic energy that is used to do work. Mechanical energy defines the energy of a system because of its motion or position.

The total mechanical energy is conserved as we know the energy can neither be created nor destroyed. The mechanical energy of a system can only be changed from one form to another whenever the forces used to do work are conservative in nature.

The energy is stored in the form of potential energy in a compressed string.  If the elastic potential energy is changed into kinetic energy as it is used to accelerate the mass.

The total mechanical energy required to compress the spring is the maximum amount of elastic potential energy stored in the spring. The greatest energy of the spring will be at the maximum displacement. Therefore, the spring will have the greatest potential energy at equilibrium positions equal to 0.12 J.

Learn more about mechanical energy, here:

brainly.com/question/13552918

#SPJ1

Answer:

A. The maximum is 8cm. B. 5 pieces of wire.

Explanation:

To find each pieces' length we need to find what can divide both wires = 8cm

A. The maximum is 8cm.

The amount of pieces = 16m/8m = 2 pieces and 24m/8m = 3 pieces. 2 pieces + 3 pieces = 5 pieces of wire.

B. 5 pieces of wire.

If N placed one of these on top of item M, the acceleration when M is dragged by a force od 20 N is 10 m/s. N weighs 2 kg, but M is 4 kg in weight.

The correct answer is D

Acceleration is the rate at which the direction and speed of a moving object change over time. Anything is said to be accelerated when it goes straighter and faster or slower. Therefore, even though the speed is constant, travel on a circle increases due to the constant change in direction.

Slow acceleration can be dangerous as well as unpleasant, especially when entering a busy state road when you must accelerate rapidly to avoid being rear-ended. When you are moving slowly up a slope while driving, acceleration can sometimes be a hassle.

To know more about acceleration visit:

https://brainly.com/question/2303856

#SPJ13

Answer:

The first one is the right answer

Explanation:

This is because a period is only completed when there is the completion of only one oscillation

Answer: A

Explanation: The research mentions both the insulin resistance and the increased heart rate. But one thin I noticed is that the increased heart rate happens at night while they sleep, but the question asks for the next morning, so A.

There’s really no exact citation found but this is as close as I can get you.

A power plant generator does easily generate alternating current and not direct

current simply because the AC current is far cheaper to produce.

The simple reason why a power plant generator generate an alternating current cheaply is because the plant loses a very few energy when electricity is being transmitted with it through a long distance. Whereas, the direct current usually, frequently and most of the time loses more energy.

So therefore, we can now deduce from above that it is easy to generate alternating current from a power plant.

Read more on generator:

https://brainly.com/question/12475693

#SPJ1

The exact centripetal acceleration experienced by passenger  ∝ₙ and  driver ∝ⁿ is 80m/s²  & 66.67m/s² respectively.

Mathematically , Centripetal acceleration ∝= v²/r

In the given question velocity will be same for passengers and driver because of common frame.

But the radius is different since distance from each points of frame to the Centre of road will vary. so their centripetal acceleration will differ.

∝= v²/r using this we can find out the exact centripetal acceleration experienced by passenger  ∝ₙ and  driver ∝ⁿ

∝ₙ= 20²/5= 80m/s²

∝ⁿ=20²/6= 66.67m/s²

To Know more about Centripetal acceleration - https://brainly.com/question/15285661?referrer=searchResults

#SPJ1

Jovian planets are less dense than terrestrial planets.

The Jovian planets lack solid surfaces, in contrast to the terrestrial planets that make up our inner solar system—Mercury, Venus, Earth, and Mars. They are made mostly of hydrogen and helium instead, with minute amounts of other gases like methane, ammonia, water, and others in their atmospheres.

Terrestrial planets formed from metal and rock-based planetesimals, but they were ultimately too small to hold much of the solar nebula's rich hydrogen and helium gas. The Jovian planets, on the other hand, originated distant from the Sun where there were abundant ices and rocks.

To know more about Jovian planets

https://brainly.com/question/14016527

#SPJ1

TRUE: The total change in momentum for this interaction is zero.

FALSE: The change in the space bug's momentum is greater than the change in the spaceship's momentum.

UNDETERMINED: If the space bug had stuck to the spaceship instead of bouncing off, momentum would not have been conserved for this interaction.

The mechanical advantage of the crow bar is 3 while the velocity ratio is 4. The efficiency of the machine is 75%.

We know that a machine is any device that can be used to make work a lot much easier. Thus, the machine is the object that could make less effort to be applied in making a greater work to be done as we can see in this case we have here.

From the question, the pieces of information that we can get are;

Distance moved by Effort = 200 cm

Distance moved by load = 0.5 m or 50 cm

Velocity ratio = Distance moved by Effort/Distance moved by load

= 200 cm /50 cm

= 4

Mechanical advantage is found to be; Load/Effort

= 600 N/200 N

= 3

Efficiency = Mechanical advantage/ Velocity ratio * 100/1

= 6/4 * 100/1

=3/4 * 100/1

= 75%

Learn more about crow bar:https://brainly.com/question/24285325

#SPJ1

The approximate centripetal force on an astronaut of mass 80Kg if the centrifuge rotates once every 2s is 3.94 KN

ac = v² / r

v = 2 π r / T

ac = Centripetal acceleration

v = Linear / Tangential velocity

T = Time period

r = Radius

r = 5 m

T = 2 s

v = 2 * 3.14 * 5 / 2

v = 15.7 m / s

ac = 15.7 * 15.7 / 5

ac = 49.298 m / s²

Fc = m ac

m = Mass

m = 80 kg

Fc = 80 * 49.298

Fc = 3943.8 N

Fc = 3.94 KN

Therefore, the approximate centripetal force on the astronaut is 3.94 KN

To know more about centripetal force

https://brainly.com/question/11324711

#SPJ9

The acceleration of the sled of combined mass 62.5 kg is 1.018 m/s².

Acceleration is the rate of change of velocity.

To calculate the acceleration of the sled, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the acceleration of the sled is 1.018 m/s².

Learn more about acceleration here: https://brainly.com/question/22048837

#SPJ1

[tex]66.015 \mathrm{~m}[/tex] will the feather have fallen if it reaches the surface in 9.00 seconds.

Given:

[tex]$$\begin{aligned}&t=9 \mathrm{~s} \\&a=1.63 \mathrm{~m} / \mathrm{s}^2\end{aligned}$$[/tex]

The distance traveled by the feather onto the surface of the moon can be computed using the following equation:

[tex]d=\frac{1}{2} a t^2=(0.5)\left(1.63 \mathrm{~m} / \mathrm{s}^2\right)(9 \mathrm{~s})^2=66.015 \mathrm{~m}$$[/tex]

Kinematics in classical mechanics explains the motion of a specific item in a system. We're looking at the motion of a feather on the moon's surface.

Kinematics is the study of mechanical points, bodies, and systems in their motion without regard for their related physical qualities or the forces acting on them. The discipline is known as geometry of motion, and it mathematically describes these motions using algebra.

To learn more about Kinematics visit:https://brainly.com/question/7590442

#SPJ9

Answer: (1) C, (2) B

Explanation: I took the test, but to solve question 1 use the inelastic collision formula m1v1+m2v2 = (m1+m2)v2 to get the answer. Question 2 is b because it states that the ball is perfectly elastic as it collides with the floor. A perfectly elastic collision is when objects collide and no net energy is lost, hence the bouncy ball still has 30 J worth of kinetic energy.

The speed of the dog as it runs with its newfound treasure is 3.75 m/sec.

The kinetic energy of the bouncy ball after it collides with floor is 30 J.

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

According to the given in question,

a.) Using inelastic collision formula

[tex]m_1v_1+m_2v_2 = (m_1+m_2)v_2[/tex]

[tex]v_2[/tex] = 60/16 m/sec = 3.75 m/sec

b.) Because it states that the ball is perfectly elastic as it collides with the floor. A perfectly elastic collision is when objects collide and no net energy is lost, hence the bouncy ball still has 30 J worth of kinetic energy.

The speed of the dog as it runs with its newfound treasure is 3.75 m/sec.

The kinetic energy of the bouncy ball after it collides with floor is 30 J.

To learn more about speed refer to the link:

brainly.com/question/28224010

 #SPJ1

The number of significant digits is 6.

The crucial or important digits that accurately represent the meaning of a certain number are known as the significant figures of that number. 6.658, for instance, has four significant digits. These huge amounts give the numbers accuracy. Additionally, they are known as significant digits.

Given that: -3.22 x 5.1.

The product of  -3.22 and 5.1 is 16.442.

In the number 16.442, there have 6 significant figures. Hence, The number of significant digits is 6.

Learn more about significant figures here:

https://brainly.com/question/29153641

#SPJ1

A race car is traveling in a uniform circular motion around a race track, the radial acceleration of the car when the velocity is doubled and the radius of the circle is halved will increase by a factor of 8 (Option D)

To arrive at the above conclusion, we must recall that radial acceleration is defined by:

Ac = v²/r; where

Ac - is the magnitude of radial acceleration

v -  is the linear or tangential speed

r - is the radius of the circular path

A′c -  is the new magnitude of the radial acceleration.

Given that the linear velocity is duplicated and simultaneously the radius is split in two, then the new radial acceleration increases by a factor of 8, according to the following calculation:

A'c = (2v²)/(0.5r)

= 4v²/(0.5r)

= 8 · (v²/r)

= 8 · Ac

Learn more about radial acceleration:
https://brainly.com/question/3388038
#SPJ1

Full Question:

A race car is traveling in a uniform circular motion around a race track what happens to the radial acceleration of the car if the velocity is doubled and the radius of the circle is halfed?

A. It remains the same.

B. It increases by a factor of 2.

C. It increases by a factor of 4.

D. It increases by a factor of 8.

E. It decreases by a factor of 2.

A 3 kilogram object traveling at 7 m/s and possessing a 42 J potential energy has a mechanical energy of 115.5 J.

Performing a specific task results in the accumulation of mechanical energy. It is the total of an object's potential energy and kinetic energy. It is stated as;

Potential and kinetic energy are the components of mechanical energy.

Given the information in the query;

The object's mass is 3 kg.

The object's speed is 7 m/s.

Object's potential energy is 42 J.

Calculate the object's kinetic energy.

Kinetic energy = 1/2 × mass × ( velocity )²

Insert the specified values.

Kinetic energy is = 1/2 x 3 kg x 7 m/s2.

Kinetic energy = 0.5 x 3 kg x 49 m2/s2.

Kinetic energy = 73.5 kg/m2/s2.

Kinetic energy = 73.5 J.

Now, the object's mechanical energy will be;

Potential energy plus kinetic energy equals mechanical energy.

Put the values in.

Mechanical energy = 42J + 73.5J

Mechanical energy = 115.5 J.

To know more about mechanical energy visit:

https://brainly.com/question/29310597

#SPJ13

The correct statement about the right ascension is "it is 3 hours to the east of zero hours right ascension.

option C is the correct answer

The right ascension of stars is the astronomical equivalent of longitude.

Right ascension is also the angular distance of the star measured eastward from the first point of Aries, also called the Vernal Equinox.

In other words, the right ascension describes how far a star is displaced from a given point towards the eastward direction along the longitude.

Lines of longitude runs from east to west. But the right ascension runs towards the east.

Thus, the correct statement describing the right ascension would measure it towards the east.

Learn more about  right ascension  here: https://brainly.com/question/4715723

#SPJ1

Answer:

3.16 × 10‐⁶

Explanation:

through coulomb's law

the force of attraction or repulsion of charges is given by the relation

F = k.q1.q2/r²

where your k = 9 × 10⁹

Answer:

Charge 3.16 mkC  microcoulomb

Explanation:

 Given:

q₁ = q₂ = q - Electrical charges

r = 60.00 sm = 0.60 m - Distance between charges

F = 0.250 N - Repulsive force between charges

___________________

q - ?

F = k·q₁·q₂ / r² = k·q·q / r² = k·q² / r²

Charge:

q = √ (F·r² / k )

q = r·√ (F / k )

q = 0.60· √ (0.250 / 9·10⁹) ≈  3.16·10⁻⁶ C or:

q = 3.16 mkC  (microcoulomb)

For one length of wire the potential difference across the wire was 1.68 V . The current in the wire was 0.70 A . The resistance of the of this length of wire will be 2.4 ohm

using ohm's law

V = IR  

I = current

R = resistance

R = V/I

  = 1.68 / 0.70 = 2.4 ohm

The resistance of the of this length of wire will be 2.4 ohm

To learn more about ohm's law here :

https://brainly.com/question/14874072

#SPJ1

Answer:

You can only stop (or start) your body moving through space if you can cause an external force to be applied to it.

Explanation:

The displacement of the runner according to the graph is obtained as 250 m.

The term displacement has to do with the distance that is covered in a specified direction. The difference between distance and displacement is that displacement is a vector while distance is a scalar quantity.

Thus we bring the direction into play when we are talking about the displacement of the object. Now we have a graph that shows the displacement of the runner in the vertical axis and then shows the time that is taken in the horizontal axis.

Given the graph as we have it, we can be bale to pick out the following from the graph;

1) Displacement of the runner at 100 s = 500 m

2) Displacement of the runner at 300 s = 750 m

Therefore;

Displacement of the runner between 100 and 300 seconds;

750 m - 500 m = 250 m

Learn more about displacement:https://brainly.com/question/11934397

#SPJ1

On research on animals they must given proper care and housing. And the purpose of the research must have a scientific reason. Thus option B  is  correct.

Animal research includes various scientific investigation on animals such as testing various doses of some drugs, effect of various chemicals, level of toxicity of some compounds etc.

According to the research ethics, no animals can be used to conduct any unscientific works. There must be a scientific purpose which is very important to conduct any animal research.

If any animals irrespective of its nature,it must be provided proper care, food and housing. No harmful things must be there which make them more suffering. Hence, option B is correct.

To find more on animal research, refer here:

https://brainly.com/question/6140246

#SPJ1