If the luminosity of a star changes, all but one of the following properties must change as well. Which property is the exception?
The star's absolute magnitude
The distance form the star to Earth
The rate at which the star uses nuclear energy
The rate at which the star releases electromagnetic energy

The system that is colliding maintains its momentum. As a result, the ball B's speed is 2m/s (option -a) when it has the same mass as the ball A.

A body's capacity to produce the greatest displacement from an applied force is known as momentum. It is the result of adding mass and speed. The two bodies' total initial momentum and total final momentum are equal in a collision.

Consequently, let u be the starting velocity and v be the ending velocity.

m₁ u₁+ m₂ u₂ = m₁ v₁ + m₁ v₂

m₁ =  0.17 kg

u₁ = 4 m/s

m₂ = 0.17 kg

u₂ = 0

Then initial momentum = 0.17 × 4 m/s + 0 = 0.68 kg m/s

v₁ = v₁ cos 30° = 3.5×√3/2

v₂ = v₂cos 60 = v/2

0.68 kg m/s = (0.17 × 3.5×√3/2 ) +  (0.17 × v₂/2)

3.5×√3/2/2 + v₂/2 = 4

3.5√3 + v₂ = 8

then v₂ = 8-3.5(1.732)

v₂ = 1.94m/s. = 2m/s

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The following information is provided in the problem: A sled with a weight of 19.7 kg is pulled with a force of 42.0 N at an angle of 43.0° across ground where μ₁ = 0.130. We need to find out the normal force that is exerted on the sled.

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Answer:

\(v_{f}=63\ \frac{m}{s}\)

Explanation:

\(v_{f}=v_{i}+a\cdot t\)

\(v_{f}=15\ +\ 6\cdot8\)

\(v_{f}=63\ \frac{m}{s}\)

Therefore, the speed of the car is 63m/s after 8 seconds while accelerating at it maximum capability.

Answer:

upward

Explanation:

:)

Answer:

Ok, because the cannon fired to the right the reactive force from the cannonball will head right

Explanation:

the reactive force from the cannonball will be faced backwards leading it to go and follow the cannonball

Explanation:

Given data

distance = 5km

time taken to travel to school= 30 min

1. the total distance traveled is

from home to school+ school to home+ home back to school

5km+5km+5km= 15 km

2. Determine the students average speed

average speed is the total distance divided by the total time taken

= (5+5+5)/(30+30+27)

= 15/87 km/min

3  What is the student total displacement

the displacement tells how far a place is  hence the displacement is 5km (i.e the school is 5km from his home)

4. Determine the students average velocity

a. speed home to school

      v= 5/30= 0.166 km/min

b. school back home

      v= 5/30= 0.166 km/min

c. speed home to school

      v= 5/27= 0.185 km/min

Average velocity =  (0.185 + 0.166 + 0.166)/3= 0.517/3= 0.17 km/min

Answer:

The answer is "36 grams".

Explanation:

In this question, the weight of the ball is not mentioned but is the weight of the cookies is declared, which is equal to 36 grams, and all the cookies are squeezes into the ball and after that, it calculates the overall weight so, let assume that ball weight is =0 and then the overall weight is:

\(=\text{weight of ball + cookies weight}\\\\=0+36 \ grams \\\\=36 \ grams\)

a. If the separation between two charged bodies is doubled, then the force between them will become one-fourth of its initial value. According to Coulomb's law, the force (F) between two charged bodies is given by: `F = (kq₁q₂)/r²`Where k is the Coulomb's constant, q₁ and q₂ are the magnitudes of charges, and r is the separation distance between the charges.

Now, if the separation distance is doubled, then the new separation distance would be 2r. Hence, the new force between them will be: `F' = (kq₁q₂)/(2r)²` = `(kq₁q₂)/4r²`Therefore, the force between them if the separation is doubled will be one-fourth of its initial value. b. If the separation between two charged bodies is halved, then the force between them will become four times of its initial value. Now, if the separation distance is halved, then the new separation distance would be r/2. Hence, the new force between them will be: `F'' = (kq₁q₂)/(r/2)²` = `(kq₁q₂)/(r²/4)` = `4(kq₁q₂)/r²`Therefore, the force between them if the separation is halved will be four times its initial value.

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To answer parts (d), (e), and (f) of your question, we need to use the law of conservation of angular momentum and the law of conservation of energy.

d) The angular speed of the skaters after they pull the pole towards them is approximately 0.019 rad/s

e) The kinetic energy of the system increases from approximately 2.22 J to approximately 0.024 J.

f)The energy for the increased kinetic energy of the system comes from the work done by the skaters in pulling the pole towards them.

(d) Angular speed of the skaters:

Before the skaters pull the pole towards them, the system is rotating with an angular speed of:

ω1 = L / I1

where L is the initial angular momentum of the system and I1 is the initial moment of inertia of the system. From part (c), we know that L = 2.5 kg·m²/s and I1 = 1.15 kg·m². Substituting these values, we get:

ω1 = 2.5 kg·m²/s / 1.15 kg·m² = 2.17 rad/s

After the skaters pull the pole towards them, the moment of inertia of the system changes to I2 = I1 + 2mR², where m is the mass of each skater and R is the radius of the circle. From part (c), we know that R = 2.5 m. Substituting these values, we get:

I2 = 1.15 kg·m² + 2(50 kg)(2.5 m)² = 131.25 kg·m²

By conservation of angular momentum, the angular momentum of the system remains constant. Therefore, we have:

L = I1ω1 = I2ω2

where ω2 is the angular speed of the skaters after they pull the pole towards them. Solving for ω2, we get:

ω2 = I1ω1 / I2 = (1.15 kg·m²)(2.17 rad/s) / 131.25 kg·m² ≈ 0.019 rad/s

Therefore, the angular speed of the skaters after they pull the pole towards them is approximately 0.019 rad/s.

(e) Kinetic energy of the system:

The initial kinetic energy of the system is:

KE1 = (1/2)I1ω1² = (1/2)(1.15 kg·m²)(2.17 rad/s)² ≈ 2.22 J

After the skaters pull the pole towards them, the kinetic energy of the system increases due to the work done by the skaters. The final kinetic energy of the system is:

KE2 = (1/2)I2ω2² = (1/2)(131.25 kg·m²)(0.019 rad/s)² ≈ 0.024 J

Therefore, the kinetic energy of the system increases from approximately 2.22 J to approximately 0.024 J.

(f) Energy source for the increased kinetic energy:

The energy for the increased kinetic energy of the system comes from the work done by the skaters in pulling the pole towards them. When the skaters pull the pole towards them, they exert a force on the pole over a distance, doing work on the system and increasing its kinetic energy. This work is done at the expense of the chemical energy stored in the skaters' muscles.

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Answer:

Force arrows are used to represent both the magnitude and direction of forces. The length of the arrow corresponds to the magnitude of the force, with longer arrows indicating forces with larger magnitudes. The direction of the arrow corresponds to the actual direction that the force is being exerted. Force arrows are used by scientists and engineers to predict the motion of an object based on the forces that are applied to it.

Let's go back to Amil and his box for a moment. To represent the force that he is exerting on the box, we can draw the box and then show the force using a force arrow, like this:

Explanation:

How would our force arrow change if he pushed the box with twice as much force? Because the magnitude of the force is doubled, the length of the force arrow should also be doubled.

Now, what if he didn't push directly to the right, but instead his arms made a 30-degree angle with the ground? In that case, the direction of the force arrow needs to change to show the direction in which the force is applied.

96 km per hour is the rate at which the space between the ships is reducing.

Speed is what it means. the speed at which an object's location changes in any direction. The distance travelled in relation to the time it took to travel that distance is how speed is defined. Speed is a scalar quantity since it just has a direction and no magnitude.

The ratio of distance travelled to time taken can be used to determine speed.

Ships A and B have travelled a combined distance of d.

Given that the two ships have travelled a total distance of, the two ships' distance at time t hours equals;

d(t) = √[(90 - 0)² + (10 - (-20))²]

d(t) = √(8100 + 900t²)

Let's differentiate utilising the chain rule now to determine how quickly the distance between the ships is changing;

d'(t) = [1/(2√(8100 + 900t²))] × 7200t

d'(t) = 3600t/√(8100 + 900t²)

d'(t) = 3600t/10√(81+ 9t²)

d'(t) = 360t/√(81 + 9²)

Now, at 4pm would have been 4 hours from noon. Thus, t = 4.

So;

d'(t) = (360×4)/√(81+ 9(4²))

d'(t) = 1440/√(81 + 144)

d'(t) = 1440/√225

d'(t) = 1440/15

d'(t) = 96 km/h

Hence, The rate that the distance between the ships is changing is 96 km per hour

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Answer: 90 Km

Explanation:

15 Km/hr X 6/hr = 90Km

The maximum length of foil that can be made from 1.34 kg of foil is approximately 9575.045 cm. Steps are discussed below:

To calculate the maximum length of foil that can be made from a given mass, we need to consider the volume of the foil and its density.

First, let's calculate the volume of the foil using its width and thickness:

Volume = Width x Thickness x Length

Since we want to find the maximum length, we can rearrange the equation as:

Length = Mass / (Width x Thickness x Density)

Given:

Width = 304 mm

Thickness = 0.017 mm

Density = 2.7 g/cm³

Mass = 1.34 kg = 1340 g

Converting the width and thickness to centimeters:

Width = 30.4 cm

Thickness = 0.0017 cm

Now, we can calculate the maximum length of foil:

Length = 1340 g / (30.4 cm x 0.0017 cm x 2.7 g/cm³)

Simplifying the equation:

Length = 1340 / (30.4 x 0.0017 x 2.7) cm

Length ≈ 1340 / 0.14005608 cm

Length ≈ 9575.045 cm

Therefore, the maximum length of foil that can be made from 1.34 kg of foil is approximately 9575.045 cm.

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Answer:

oil and gas drilling across the country. is an example

Explanation:

Answer:

Oil and Gas would be a drawback

Explanation:

Hope this helps ^^

Have a great day!

Answer:

The gas will change to a liquid

Explanation:

Basically condensation happens

Answer:A compound is a substance formed when two or more elements are chemically joined.

Explation:Water, salt, and sugar are examples of compounds.

I hope this helps<3

Answer:

Yes

Explanation:

the human body is able to emit light but I. small portions often difficult for the human eye to see.

Since this is a circular motion, we know that the we have a centripetal acceleration; we know that this type of acceleration always points towards the center of the circle. This means that the acceleration is represented by the vectors that point towards the center. Looking at them we notice that at point Z the acceleration is pointing to the right.

Therefore, the object is accelerating to the right at Z

The phenomenon in hearing that is analogous to spatial frequency channels in vision is critical bands. Hence, the correct option is A: Critical bands.

Critical bands are regions of the audible frequency range in which a complex sound is divided into individual, discrete frequency bands by the human auditory system.

For instance, when different frequencies in a complex sound, such as a musical instrument or a human voice, are picked up by the ear, they are sent to the brain via various channels that respond to specific frequencies.

These channels are referred to as critical bands. The frequency range of these bands varies depending on the loudness of the sound.

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Answer:

Cretacious-Tertiary

Explanation:

I hope this helps!

Answer:

i think its 644

Explanation:

Answer:

the first question is B, if not then its C

Explanation:

sorry if I am wrong

Tempreture √12 is  degrees Celsius per meter.

What is tempreture?

tempreture is the degree of hotness or coldness of any kind of objects.

Sol-

The highest rate of temperature increase is given as 6degrees as per the question

imagine this high rate as a diagonal vector pointing in the northeast direction.

This vector has an x component (horizontal, or east) and a y component (vertical, or north).

The highest rate (maximum) is found as the magnitude of these two components.

It is the square root of (x^2)+(y^2).

6= √((x^2)+(y^2))

-> Take the square of both sides to remove the square root on the right side of the equation.

36 = (x^2)+(y^2)

-->The x^2 and y^2 values each must equal 8 in order to get:  12

(x^2) = 12

x = √12

(y^2) = 12

y = √12

If the object moves directly north, it is therefore moving only in the y-direction.

Thus, it is increasing tempreture at a rate of √12 degrees Celsius per meter.

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Answer:

d. circuit

Explanation:

the parts of the circuit consists of a load or resistance

Question:

What is a disadvantage of using nuclear power to produce electricity?

Answer:

Disadvantages of Nuclear Power

The further implementations of nuclear power are limited because although nuclear energy does not produce CO2 the way fossil fuels do, there is still a toxic byproduct produced from uranium-fueled nuclear cycles: radioactive fission waste.

Answer:

Disadvantages of nuclear energy include the high cost of building a power plant and safety concerns about the operation of the plant and disposal of spent fuel rods.

Explanation:

Hope this helps.

From the calculations and the free body diagram, the net force that acts on the body is 34.5 N

The net force refers to the force that is acting on a body. Let us note that the gravitational force and the normal force cancel out each other. Thus the two force that act on the body are the applied force and the frictional force.

Thus;

The  net force that acts on the body is;

40.2 N - 5.7 N = 34.5 N

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an electromagnetic wave emitted with a frequency of 5.0*10^15 hz would be classified as an ultraviolet ray.

The term for the collection of all electromagnetic radiation in the cosmos is the electromagnetic spectrum or EM spectrum. In the form of electric and magnetic waves, this kind of energy permeates the cosmos and enables the transmission of information and energy.

The entire range (electromagnetic spectrum) is given by radio waves, microwaves, infrared radiation, visible light, ultra-violet radiation, X-rays, gamma rays, and cosmic rays in the increasing order of frequency and decreasing order of wavelength.

the type of radiation as per the value of frequency is shown in the table below:

As we can see in the table an electromagnetic wave emitted with a frequency of 5.0*10¹⁵ hz will be classified as an ultraviolet ray.

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The main force(s) acting on the puck after receiving the kick is a downward force of gravity, an upward force exerted by the surface, and a horizontal force in the direction of motion.

Friction can be defined as that resistance that one surface or object encounters when moving over another.

So therefore, the main force(s) acting on the puck after receiving the kick is a downward force of gravity, an upward force exerted by the surface, and a horizontal force in the direction of motion

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