the luminosity of star a is 26 time bigger than luminosity of star b. star a is also known to be 3 times closer than star b

Given,

Radius of the circle r=7 m

The tangential velocity is v=15 m/s.

The acceleration is

The acceleration is towards the centre.

Answer:

I really don't want to go out for a week and I deserve to be wit me she said that she would have been able even better then again this year moma and she was the one that was earlier than you and my parents are going through a tough time and it was broken down into the last time I was coming from but I see an feel a lot of hate

Explanation:

no exceptions

The Kinetic energy of the cell phone of mass 0.08 kg is 9 J.

Kinetic energy is the energy of a body in motion.

To calculate the kinetic energy of the cell phone, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the Kinetic energy of the cell phone is 9 J.

Learn more about kinetic energy here: https://brainly.com/question/25959744

#SPJ1

Answer:

(a) The resistance of 25m of wire is 3 ohms

(b) the length of this wire that has resistance 22 ohms is 183.33 m

Explanation:

Given;

resistivity of the wire, ρ = 0.12 ohms per meter

(a) The resistance of 25m of wire is calculated as follows;

\(R = \rho L\\\\R = 0.12 \ \frac{ohms}{m} \times 25\ m\\\\R = 3 \ ohms\)

(b) the length of this wire that has resistance 22 ohms is calculated as;

\(L = \frac{R}{\rho} \\\\L = \frac{22 \ ohms }{0.12 \ ohms/m} = 183.33 \ m\)

The momentum of an object is the product of its mass and velocity. Among the given objects the 950 kg Chevrolet minivan moving at 18 m/s has the greatest momentum.

Momentum of n object is the product of its mass and velocity. Hence, an increase in the mass or velocity or in both will increase the momentum of the object.

Momentum = mass × velocity

hence the 3000 kg truck stopped in the traffic has no momentum because it has no velocity.

Momentum of 950 kg Chevrolet minivan moving at 18 m/s is:

950 kg × 18 m/s = 17100 kg m/s.

Momentum of 0.040  kg bullet traveling  at 120m/s is:

0.04 kg × 120 m/s = 4.8 kg m/s.

Momentum of 52 kg figure skater gliding at 7 m/s is:

52  kg × 7 m/s = 364  kg m/s.

Therefore, the Momentum of 950 kg Chevrolet minivan moving at 18 m/s has the greatest momentum.

Find more on momentum:

https://brainly.com/question/30677308

#SPJ9

The polynomial relationship between position and time for the bowling ball is linear.

A linear relationship between two variables is a term used to describe a straight-line relationship between the two variables.

Linear relationships can be expressed either in a graphical format or as a mathematical equation of the form y = mx + b.

From the equation of linear relationship between two variable, the highest power of x is one.

The given equation for position and time;

x(t) = vot + xo

From this given equation, the highest power of t is one, hence it is called linear relationship.

Thus, the polynomial relationship between position and time for the bowling ball is linear.

Learn more about linear relationship here: https://brainly.com/question/6691346

#SPJ1

Based on Newton's first  and second law of motion most people would find it less painful to catch a flying baseball than a bowling ball flying at the same speed as the baseball because the mass of the baseball is smaller and will require smaller force to be stopped.

Newton's first law of motion first law of motion states that a body at rest or uniform motion in a straight line will continue in that path unless acted upon by an external force.

Newton's first law of motion is also called law of inertia because it depends on mass of the object.

An object with a greater mass will require greater force to be stopped or get moving.

Based on Newton's first law of motion most people would find it less painful to catch a flying baseball than a bowling ball flying at the same speed as the baseball because the mass of the baseball is smaller and will require smaller force to be stopped.

Also according to Newton's second law of motion, the force applied to an object is proportional to the product of mass and acceleration of the object. Thus, a baseball with smaller mass will require smaller force to be stopped.

Learn more about Newton's first law of motion here: https://brainly.com/question/10454047

#SPJ1

Answer:

W = 10000J

Explanation:

W = F • s

W = Work in J

F = Force in N

s = displacement in m

W = 5000N • 2m

W = 10000J

Answer:

15X30 + 3 e = 12Y30

Above an atom with 15 electrons (15 neutrons) accepts 3 electrons and thus reduces its charge by 3, but the number of neutrons remains the same

If the atom had a charge of 18 before accepting the electrons, it's charge would be reduced by three to 15

18X30 + 3e = 15Y30

From the question I am not sure the atomic number of 15 is before or after accepting the electrons

In any case the charge is reduced by three and the atomic mass is unchanged

Given:

Height = 25 m

Distance from the edge to where it lands = 27 m.

Let's find the final horizontal velocity of the tennis ball.

To find the final horizontal velocity of a projectile motion, apply the formula:

The initial horizontal velocity and the final horizontal velocity are the same since there is no force acting on the object.

Now, to find the horizontal velocity, let's first make a free sketch of this situation:

Let's find the time of flight:

Where:

h = 25 m

g is acceleration due to gravity = 9.8 m/s²

Thus, we have:

The time of flight if the projectile is 2.26 seconds.

Now, to find the final horizontal velocity, we have:

Where:

x is the horizontal distance = 27 m

Thus, we have:

Therefore, the final horizontal velocity is 11.96 m/s.

ANSWER:

11.96 m/s

Answer:

\(c=0.45\ J/g^{\circ} C\)

Explanation:

Given that,

A 25 g sample of iron (initially at 800.00°C) is dropped into 200 g of water (initially at  30.00°C). The final temperature of the system is 40.22°C.

We need to find the specific heat of iron.

It can be calculated as:

Cooler water gains = hot metal loses

mc∆T = - mc∆T

Put all the values,

\(200g(4.184\ J/g^{\circ} C)(T_f-T_i) = -25g(c)(T_f-T_i) \\\\200g(4.184 )( 40.22-30.00) = -25\times (c)\times (40.22-800.00)\\\\8552.096 = 18994.5c\\\\c=\dfrac{8552.096 }{18994.5}\\\\c=0.45\ J/g^{\circ} C\)

So, the specific heat of iron is \(0.45\ J/g^{\circ} C\)

The density of the metal is  determined as  6.1 g / cm³.

The density of the metal is defined as the ratio of the mass per unit volume of the metal.

Mathematically, the formula for density is given as;

ρ = m / V

where;

The density of the metal is  calculated as follows;

ρ = ( 0.47 kg x 1000 g/kg ) / ( 77 cm³ )

ρ = 6.1 g / cm³

Learn more about density here: https://brainly.com/question/6838128

#SPJ1

Answer:

(a) m = 1.6 x 10²¹ kg

(b) K.E = 2.536 x 10¹¹ J

(c) v = 7.12 x 10⁵ m/s

Explanation:

(a)

First we find the volume of the continent:

V = L*W*H

where,

V = Volume  of Slab = ?

L = Length of Slab = 4450 km = 4.45 x 10⁶ m

W = Width of Slab = 4450 km = 4.45 x 10⁶ m

H = Height of Slab = 31 km = 3.1 x 10⁴ m

Therefore,

V = (4.45 x 10⁶ m)(4.45 x 10⁶ m)(3.1 x 10⁴ m)

V = 6.138 x 10¹⁷ m³

Now, we find the mass:

m = density*V

m = (2620 kg/m³)(6.138 x 10¹⁷ m³)

m = 1.6 x 10²¹ kg

(b)

The kinetic energy will be:

K.E = (1/2)mv²

where,

v = speed = (1 cm/year)(0.01 m/1 cm)(1 year/365 days)(1 day/24 h)(1 h/3600 s)

v = 3.17 x 10⁻¹⁰ m/s

Therefore,

K.E = (1/2)(1.6 x 10²¹ kg)(3.17 x 10⁻¹⁰ m/s)²

K.E = 2.536 x 10¹¹ J

(c)

For the same kinetic energy but mass = 77 kg:

K.E = (1/2)mv²

2.536 x 10¹¹ J = (1/2)(77 kg)v²

v = √(2)(2.536 x 10¹¹ J)

v = 7.12 x 10⁵ m/s

Answer:

The answer is 196

Explanation:

Because the on the test I got it right

Their power output in watts as they do so will be "200 W". To understand the calculation, check below.

According to the question,

Person's mass, m = 50 kg

Distance, d = 2 m

Time, t = 5 seconds

As we know,

Force = Mass × Acceleration

          = 50 × 10

          = 500 N

Now,

Work done = Force × Distance

                   = 500 × 2

                   = 1000 J

hence,

The Power will be:

= \(\frac{Work \ done }{Time}\)

By substituting the values,

= \(\frac{1000}{5}\)

= 200 W

Thus the above answer is correct.

Find out more information about power here:

https://brainly.com/question/1634438

Answer:

The kinetic theory of matter -all matter consists of many, very small particles which are constantly moving or in a continual state of motion. The degree to which the particles move is determined by the amount of energy they have and their relationship to other particles.Explanation:

Answer:

The first set of errors, which include friction and imperfect elasticity, are systematic errors because they arise from consistent factors that affect the measurements in a predictable way. These errors will be present in every trial of the experiment and will cause a consistent deviation from the true value.

The second set of errors, which include small amounts of friction and the initial velocity of glider 2, are also systematic errors because they arise from consistent factors that affect the measurements in a predictable way. These errors will also be present in every trial of the experiment and will cause a consistent deviation from the true value.

Explanation:

If there is no existence of capacitors in our world there would be no electrical or electronic engineering.

A capacitor is a device that stores electrical energy in an electric field. It has two terminals and is a passive electrical component. Capacitance refers to a capacitor's effect. A capacitor commonly referred to as a condenser is one of the fundamental parts needed to create electronic circuits. Without fundamental parts like resistors, inductors, diodes, transistors, etc., a circuit's design is incomplete or it won't work properly.

Energy storage is capacitors' most popular application. Power conditioning, signal coupling or decoupling, electronic noise filtering, and remote sensing are further applications. Capacitors are employed in a wide variety of industries and have integrated into daily life due to their numerous applications.

There are numerous significant uses for capacitors. They are employed in digital circuits, for instance, to prevent the loss of data saved in big computer memories during a brief loss of power. The electric energy held in such capacitors keeps the data from being lost during a brief power outage.

To know more about capacitors refer to:  https://brainly.com/question/14126841

#SPJ9

Answer:

C. 30

Explanation:

current = power / voltage

-> 3600/120 = 30

The angle I can rightly be called the angle of reflection.

The incident ray, the reflected ray, and the normal all reside on the same plane, according to the angles of reflection. This suggests that reflection may occur when two angles are in the same plane as the normal.

The angle I and depicted can appropriately be referred to as the angle of reflection in light of the aforementioned information.

Lastly, it is obvious from the image that angle I is the angle of reflection.

Learn more about reflection at:

brainly.com/question/12029226

#SPJ1

Answer:

20 Hz

15.8 times

Explanation:

A

Although the range of frequency for any human's ear is usually said to be between 20 Hz and 20 kHz. And since the question asked for the least intense frequency, that has to be 20 Hz. Essentially the frequency most people perceive the least intense sound is 20 Hz.

B

A 100-Hz sound must be 10^1.2 times or 15.8 times more intense compared to a 1000-Hz sound to be perceived as equal to 60 phons of loudness

Change in velocity per unit time.

Explanation

Acceleration is defined as rate of change of velocity w.r.t time.

\(\boxed{\sf Acceleration=\dfrac{dv}{dt}}\)

Answer:

The loss in rotational kinetic energy due to the collision is 36.585 J.

Explanation:

Given;

mass of the disk, m₁ = 1.64 kg

radius of the disk, r = 0. 61 m

angular velocity of the disk, ω₁ = 17.6 rad/s

mass of the rod, m₂ = 1.51 kg

length of the rod, L = 1.79 m

angular velocity of the rod, ω₂ =  5.12 rad/s (clock-wise)

let the counter-clockwise be the positive direction

let the clock-wise be the negative direction

The common final velocity of the two systems after the collision is calculated by applying principle of conservation of angular momentum ;

m₁ω₁  + m₂ω₂ = ωf(m₁ + m₂)

where;

ωf is the common final angular velocity

1.64 x 17.6    + 1.51(-5.12) = ωf(1.64 + 1.51)

21.1328 = ωf(3.15)

ωf = 21.1328 / 3.15

ωf = 6.709 rad/s

The moment of inertia of the disk is calculated as follows;

\(I_{disk} = \frac{1}{2} mr^2\\\\I_{disk} = \frac{1}{2} (1.64)(0.61)^2\\\\I_{disk} = 0.305 \ kgm^2\)

The moment of inertia of the rod about its center is calculated as follows;

\(I_{rod} = \frac{1}{12} mL^2\\\\I_{rod} = \frac{1}{12} \times 1.51 \times 1.79^2\\\\I _{rod }= 0.4032\ kgm^2\)

The initial rotational kinetic energy of the disk and rod;

\(K.E_i = \frac{1}{2} I_{disk}\omega _1 ^2 \ \ + \ \ \frac{1}{2} I_{rod}\omega _2 ^2 \\\\K.E_i= \frac{1}{2} (0.305)(17.6) ^2 \ \ + \ \ \frac{1}{2} (0.4032)(-5.12) ^2\\\\K.E_i = 52.523 \ J\)

The final rotational kinetic energy of the disk-rod system is calculated as follows;

\(K.E_f = \frac{1}{2} I_{disk}\omega _f ^2 \ \ + \ \ \frac{1}{2} I_{rod}\omega _f ^2\\\\K.E_f = \frac{1}{2} \omega _f ^2(I_{disk} + I_{rod})\\\\K.E_f = \frac{1}{2} (6.709) ^2(0.305+ 0.4032)\\\\K.E_f = 15.938 \ J\)

The loss in rotational kinetic energy due to the collision is calculated as follows;

\(\Delta K.E = K.E_f \ - \ K.E_i\\\\\Delta K.E = 15.938 J \ - \ 52.523 J\\\\\Delta K.E = - 36.585 \ J\)

Therefore, the loss in rotational kinetic energy due to the collision is 36.585 J.

Answer:

5502 kg m/s

Explanation:

Force = mass x (velocity/time) 

Force = (mass x velocity)/time 

Force = momentum/time

Let’s calculate change in momentum:

p/6 = 917N

p = 5502 kg m/s

Hence, we got the change in momentum.

Hope it helps! :)

Answer:

The force and texture of an object matter a lot.

Explanation:

If you were to try and run up a glass hill, could you? You maybe could, but it would be harder to than up carpet.

Answer:

C

Explanation:

The thermal energy from her hand will go up into the smoothie.

Answer:

C bois

Explanation:

I = M g sin / (L  B), where M, L,, and B are the provided variables and g is the acceleration due to gravity (9.81 m/s2), determines the amount of current in the wire that will keep it at rest.

The magnitude of the magnetic field is inversely related to the perpendicular distance from the wire and proportionate to the current.

We need to use the equation for the force on a current-carrying wire in a magnetic field to estimate the size of the current in the wire that will keep it at rest:

F = I L × B

The weight of the wire's component moving down the incline must be balanced by the force acting on the wire:

F = M g sinθ

For the wire to remain at rest, these two forces must be equal:

I L × B = M g sinθ

Solving for I, we get:

I = M g sinθ / (L × B)

To know more about acceleration visit:-

https://brainly.com/question/12550364

#SPJ1

The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

Know more about  potential energy    here:

https://brainly.com/question/21175118

#SPJ8

The answer for the experiment is obtained by the principle of Newton's law of cooling. The initial temperature of the Room is taken as 32°C.

The ice cubes are mixed with room-temperature water, the ice starts to melt and the water becomes cold. This is because the ice and water have two different temperatures and when they are mixed there is an exchange of heat is taken place. When the ice cubes mixed with water the room temperature is decreases from 32°C. After stirring the mixture because of the heat released, the temperature increases.

When the ice-water mixture is stirred, the heat energy is evolved which melts the ice in the mixture, and therefore the temperature increases gradually. And stirring of water for every 5 minutes leads ice cubes to melt completely to form water and the level of water increases in the final stage. This was given by Newton's law of cooling.

To learn more about Newton's law of Cooling:

https://brainly.com/question/14643865

#SPJ1

Answer:

j120

Explanation:

qll energy for residential is 120 and that's what ruffly is always used for wiring