help.....please science​

Answer:

If I'm not wrong; I think the answer is A

Explanation:

A. Increasing kinetic energy

Answer:

Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.Explanation:

Answer:

C: 3.93 x 10^22 free electrons

Explanation:

The no. of free electrons can be found out using the following formula:

[tex]N = V\rho\\[/tex]

where,

N = No. of free electrons = ?

V = Volume = 2.55 cm³

ρ = density of electrons = 1.54 x 10²² free electrons/cm³

Therefore, using these values in the equation, we get:

[tex]N = (2.55\ cm^3)(1.54\ x\ 10^{22}\ free\ electrons/cm^3)\\[/tex]

N = 3.93 x 10²² free electrons

Therefore, the correct option is:

C: 3.93 x 10^22 free electrons

Answer:

B is the answer.

Explanation:

I am doing the same Assignment.

Answer: Microtrauma stimulates muscle growth!

Explanation - I hope that helped!

Check the images.. it has a few different questions and answers! Hope it helps

Answer:

what are the A B C D E

Explanation:

Answer:

Because here is a number of electrons more applied to the balloon

Answer:

The impulse experienced by the car is 52,500 kg.m/s.

Explanation:

Given;

mass of the car, m = 1500 kg

initial velocity of the car, u = 55 m/s

final velocity of the car, v = 90 m/s

The impulse experienced by the car is the change in linear momentum, calculated as follows;

J = ΔP = mv  - mu

ΔP = m(v - u)

ΔP = 1500(90 - 55)

ΔP = 52,500 kg.m/s

Therefore, the impulse experienced by the car is 52,500 kg.m/s.

Answer:

The shape of a screw is a cylindric shape that grows in diameter at the top. Along the cylindar portion, it has horizantal ridges that circulate around the screw.

Hope this helps, brainliest pls :D

Answer:

consider rabies injections if the animal is not found

hope it helps

Answer:

I think flush it out with soap and water for a while but for first aid Consider rabies injections

Explanation:

Miniature circuit breakers is called the developed form of fuse because MCBs are more sensitive to current than fuses. They immediately detect any abnormality and switch off the electrical circuit automatically. This prevents any permanent damage to electrical appliances and human beings

Answer:

Surface tension.

Explanation:

Water has this thing called surface tension, where the water, most of the time, is hard to split.

A few examples of surface tension in action:

Hope this helps you!

Answer:

F = 2.49 x 10⁻⁹ N

Explanation:

The electrostatic force between two charged bodies is given by Colomb's Law:

[tex]F = \frac{kq_1q_2}{r^2}\\[/tex]

where,

F = Electrostatic Force = ?

k = colomb's constant = 9 x 10⁹ N.m²/C²

q₁ = charge on proton = 1.6 x 10⁻¹⁹ C

q₂ = second charge = 1.4 C

r = distace between charges = 0.9 m

Therefore,

[tex]F = \frac{(9\ x\ 10^9\ N.m^2/C^2)(1.6\ x\ 10^{-19}\ C)(1.4\ C)}{(0.9\ m)^2}[/tex]

F = 2.49 x 10⁻⁹ N

31.5N

I have confirmed it is the right answer.

Answer:Newton's 2nd law

Explanation:Newton's 2nd law also states that the rate at which an object changes speed is proportional to the force that is exerted. Engines provide thrust and accelerate a plane forward along the runway. If the engines supply a small force, only a small acceleration will result.

Answer:

A thin wire has more resistance than a thick wire

A short wire has less resistance than a long wire

A warm wire has more resistance than a cool wire

Answer: More, less, more

Explanation:

Edge 2021

The speed of wave with a wavelength of 4 m and a frequency of 85 Hz is 340m/s

The speed of a wave is the product of the frequency of the wave and its wavelength. Mathematically, it is expressed as:

[tex]v = f \lambda[/tex] where:

f is the frequency

[tex]\lambda[/tex] is the wavelength

Given the following:

f =85Hz

[tex]\lambda[/tex] = 4 m

Substitute the given parameter into the formula:

v = 85 × 4

v = 340m/s

Hence the speed of wave with a wavelength of 4 m and a frequency of 85 Hz is 340m/s

Learn more here: https://brainly.com/question/15721131

Answer:

The answer is d i think so yea

Explanation:

hope u hae  a really good  day

Answer:

14.4

Explanation:

distance / time

so

72/5

14.4

Answer:

The Answer is gonna be A. It will speed up

Explanation :if it has the same velocity it will only change if the weight is less

This is the Answer

I hope I helped

I hope you are having a great day :3:3:3:3:3:3

Answer:

B

Explanation:

Why would it speed up if it is the same velocity??

It would stay at teh same speed. It would only increase if it weighed less.

Answer:

A. 4 m³

B. 1 m³

Explanation:

A. Determination of the new volume.

Initial Volume (V₁) = 2 m³

Initial temperature (T₁) = 27 °C + 273 = 300 K

Final temperature (T₂) = 327 °C + 273 = 600 K

Final volume (V₂) =?

V₁ / T₁ = V₂ / T₂

2 / 300 = V₂ / 600

Cross multiply

300 × V₂ = 2 × 600

300 × V₂ = 1200

Divide both side by 300

V₂ = 1200 / 300

V₂ = 4 m³

B. Determination of the new volume.

Initial Volume (V₁) = 2 m³

Initial temperature (T₁) = 27 °C + 273 = 300 K

Final temperature (T₂) = –123 °C + 273 = 150 K

Final volume (V₂) =?

V₁ / T₁ = V₂ / T₂

2 / 300 = V₂ / 150

Cross multiply

300 × V₂ = 2 × 150

300 × V₂ = 300

Divide both side by 300

V₂ = 300 / 300

V₂ = 1 m³

Answer:

Los coeficientes de fricción estática y cinética son [tex]\frac{1}{15}[/tex] y [tex]\frac{1}{60}[/tex], respectivamente.

Explanation:

Por la Primera Ley de Newton, sabemos que la fuerza externa debe tener igual magnitud y dirección contraria a la fuerza de reacción (fricción). Puesto que el trineo se mueve sobre una superficie horizontal, la magnitud de la fuerza normal es la del peso ([tex]W[/tex]), en newtons. El coeficiente de fricción estática ([tex]\mu_{s}[/tex]), sin unidad, es la razón de la fuerza de fricción justo antes del movimiento inminente ([tex]F[/tex]), en newtons, a la fuerza normal ([tex]N[/tex]), en newtons:

[tex]\mu_{s} = \frac{F}{W}[/tex] (1)

Si sabemos que [tex]F = 40\,N[/tex] y [tex]W = 600\,N[/tex], entonces el coeficiente de fricción estática es:

[tex]\mu_{s} = \frac{F}{W}[/tex]

[tex]\mu_{s} = \frac{40\,N}{600\,N}[/tex]

[tex]\mu_{s} = \frac{1}{15}[/tex]

El coeficiente de fricción cinética ([tex]\mu_{k}[/tex]), sin unidad, es la razón de la fuerza de fricción experimentada por el trineo en movimiento ([tex]F[/tex]), en newtons, a la fuerza normal:

[tex]\mu_{k} = \frac{F}{W}[/tex] (2)

Si sabemos que [tex]F = 10\,N[/tex] y [tex]W = 600\,N[/tex], entonces el coeficiente de fricción cinética es:

[tex]\mu_{k} = \frac{F}{W}[/tex]

[tex]\mu_{k} = \frac{10\,N}{600\,N}[/tex]

[tex]\mu_{k} = \frac{1}{60}[/tex]

Los coeficientes de fricción estática y cinética son [tex]\frac{1}{15}[/tex] y [tex]\frac{1}{60}[/tex], respectivamente.

Explanation:

The energy of a wave is given by :

[tex]E=\dfrac{hc}{\lambda}[/tex]

Where

h is Planck's constant

c is the speed of light

[tex]\lambda[/tex] is wavelength

Energy is inversely proportional to wavelength. Also, the relation between frequency and wavelength is inverse.

If the frequency is high, the wavelength will be shorter.

Hence, the correct options are :

Higher frequencies have shorter wavelengths.

Shorter wavelengths have lower energy.

Lower frequencies have lower energy.

Answer:

In coastal areas, strong winds and powerful waves break off soft or grainy rocks from hardier rocks. Too much weathering occurs, it might break off parts of the cliff and be dangerous to humans, or animals.

Rain has acid in it which could eat up the cliff.

Explanation:

Answer:

c.

Explanation:

Answer:

The Letter answer that best fits the question is C(It authorized construction of interconnected highways.)

Explanation:

I took the test