What happens to density of the metal when immersed in different liquids?​

Answer:

18.02

Explanation:

Answer:

C) 18.02

Explanation:

A.P.E.X

Answer:

yes

Explanation:

The plants use water (H2O) from the soil and carbon dioxide (CO2) from the air and recombine them to form carbohydrates (CH2O) and oxygen (O2).

Answer:

 When an electric current flows, the shape of the magnetic field is very similar to the field of a bar magnet

Explanation:

Answer: Contact force

a. Applying break in a vehicle.

d. The speed of ball rolling on ground is reduced

Non contact force

b. A coconut falling from a coconut tree.

c. The planets revolving around the sun.

Explanation:

The contact force is the force which exerts when one object or entity comes in contact with other object or entity. For example, on application of break the vehicle stops, the force is applied on the breaks to stop the vehicle. The ball rolling on the ground the speed reduces so the application of force on the ground also reduces.

The non contact force is the force one object exerts on the other without coming in direct contact with the other object. The force exerted by one object on other due to gravity is a non contact force. The coconut falling on the ground and planets revolving around the sun are examples of non contact force due to gravity.

Answer:

We conclude that the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s is 393.75 N.

Explanation:

Given

To determine

We need to determine the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s.

We know a centripetal force acts on a body to keep it moving along a curved path.

We can determine the centripetal force using the formula

[tex]F_c=\frac{mv^2}{r}[/tex]

where

substitute m = 7, r = 4, and v = 15 in the formula

[tex]F_c=\frac{mv^2}{r}[/tex]

[tex]F_c=\frac{7\left(15\right)^2}{4}[/tex]

[tex]F_c=\frac{1575}{4}[/tex]

[tex]F_c=393.75[/tex] N

Therefore, we conclude that the centripetal force needed to keep a 7kg mass moving in a circle of 4 meters radius at 15m/s is 393.75 N.

Answer:

Hey heres your ans

Explanation:

Wavelength will increase

Tq

Answer:

it will be base on the climate change.

Explanation: so let just say tomorrow it will be cold so the atmosphere will circle on the coolest atmosphere away from the sun.

An object's position in the solar system affects both its motion and temperature. Objects closer to the Sun experience a stronger gravitational force, causing faster or slower orbits. Other planets and moons also influence an object's orbit and speed. Objects closer to the Sun receive more solar radiation and are hotter, while those farther away receive less radiation and are colder. Additionally, the composition of an object's surface can affect its temperature.

The solar system refers to the group of celestial bodies that orbit around the Sun, including planets, dwarf planets, moons, asteroids, comets, and other small bodies. It is located in the Milky Way galaxy and spans a distance of about 4.6 billion years in age. The eight planets in the solar system, in order from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The solar system is held together by the gravitational force of the Sun and is a subject of scientific study to understand the formation and evolution of our own planet and the other bodies in the solar system.

Here in the Question,

An object's position in the solar system can affect both its motion and temperature. Here's how:

Motion: The motion of an object in the solar system is affected by its distance from the Sun and the gravitational forces of other celestial bodies. An object closer to the Sun will experience a stronger gravitational force than an object farther away. This can cause the object's orbit to be faster or slower depending on its position. Additionally, the gravitational pull of other planets and moons can affect the object's orbit and speed.

Temperature: An object's temperature in the solar system is affected by its distance from the Sun and the composition of its surface. Objects closer to the Sun receive more solar radiation and thus have a higher temperature. Objects farther away receive less radiation and are colder. Additionally, the composition of the object's surface can affect its temperature. For example, objects with high albedo (reflectivity) will reflect more solar radiation and have a lower temperature than objects with low albedo.

Therefore, an object's position in the solar system has a significant impact on its motion and temperature. By studying the positions of celestial bodies and their effects on each other, scientists can gain a better understanding of the dynamics of the solar system and the properties of objects within it.

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Answer:

b. B, A, C

Explanation:

To solve this problem, let us find the net forces they are experiencing.

 Net force  = mass x acceleration

Object A;  mass  = 8kg and acceleration  = 4m/s²

                 Net force  = 8 x 4  = 32N

Object B;  mass  = 10kg and acceleration  = 3m/s²

                 Net force  = 10 x 3  = 30N

Object C:   mass  = 7kg  and acceleration  = 5m/s²

                   Net force  = 7 x 5 = 35N

So, increasing order of their net force;

              B < A < C

Answer:

8.83m below I hope I got it

Answer:

f. 500N

Explanation:

The force exerted by the wagon on the horse is 500N directed in the opposite path .

This is premised on the Newton's third law of motion which states that "action and reaction forces are equal and opposite in direction".

So, as the action force of 500N is used by the horse to drag the wagon, the wagon also exerts an oppositely directed force of 500N on the horse.

This way, the acceleration can continue.

Answer:

true

Explanation:

because u will use more force to start an object rather than to push moving object

If you only know its speed, that's not enough information to catch it. You could even chase it at DOUBLE that speed, and you'd never catch it if you were chasing in the wrong direction.

You also have to know the DIRECTION the runaway car is going, so that you can chase in the same direction.

Now that you know its speed AND direction, you know its velocity. You need that information to have any chance of catching it.

Answer:

The spring constant is k=7031.25

Explanation:

We start by using the conservation of mechanical energy:

Ui + Ki = Uf + Kf

the Ui (initial potential energy) is zero since the spring is relaxed.

In the final situation, the Kf (final kinetic energy is zero since the car and spring are NOT in motion)

Then we have:

[tex]K_i=U_f\\\frac{1}{2} m*v^2=\frac{1}{2} k*(\Delta x)^2\\\frac{1}{2} 2000*15^2=\frac{1}{2} k*(8)^2\\k=7031.25[/tex]

Answer:

5000N

Explanation:

Given parameters:

Area of the book cover  = 0.05m²

Atmospheric pressure  = 100kPa  = 100 x 10³Pa

Unknown:

Downward force of the atmosphere on the book  = ?

Solution:

Pressure is defined as the force per unit area on a body.

 So;

 Downward force  = Atmospheric pressure x Area

  Downward force  = 100 x 10³ x 0.05  = 5000N

Answer:

upward thrust, makes the rocket go up

and kentic energy, you swing and the energy that was built up before you hit the ball was transferred

Explanation:

Answer:

concave

Explanation:

the middle of the concave lens is narrow and the edges are flattened.

Answer:

A.

Explanation:

During the fall the day gets shorter hence less sunlight this results to leaves stopping their food making process. The chlorophyll breaks down, the green color disappears and the yellow to orange color becomes visible

Answer:

magnitude of v = 2.5 m/s, and in the same direction as the initial velocity of the 5 kg ball.

Explanation:

We use conservation of linear momentum in an elastic collision to solve for the unknown velocity v:

Pi = Pf

5 kg * 5 m/s + 10 kg * 0 m/s = 5 kg * 0 m/s + 10 kg * v

25 kg m/s = 10 kg * v

v = 25/10 m/s

v = 2.5 m/s

and in the same direction as the initial velocity of the 5 kg ball.

Answer:

45000kgm/s due east

Explanation:

Given parameters:

Mass of the car  = 1.5 x 10³kg

Velocity  = 30m/s

Time taken  = 60s

Unknown:

Momentum  = ?

Solution:

Momentum is the quantity of motion a body possess,

     Momentum  = mass x velocity

So;

  Momentum  = 1.5 x 10³ x 30  = 45000kgm/s due east

Answer:

it transfers to other objects so as time goes on it becomes negative

Explanation:

In other words, the carpet took the charge from your socks

Answer:

B.) 0.3s

Explanation:

The period of a wave that has a frequency of 3 Hz is 0.3s. Hence option B is correct.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave.

Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave. Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a transverse wave.

Time period of the wave is inverse to the frequency of the wave.  

T = 1/f

T = 1/3

T = 0.333 s

Hence option B is correct.

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Answer:

I think it would be A

Explanation:

Air, water, and warmth

Excuse my mistake if I get it wrong.

Answer:

I think it would be A

Explanation:

Air, water, and warmth

hopes this helps

Answer:

If an object is at rest, then there are no forces acting upon the object.

Explanation:

It would take an unbalanced force to keep an object in motion at a constant velocity. It is the natural tendency of all objects to eventually come to a rest position.

Answer:

I know one answer is an observer on earth sees a lunar eclipse

Answer:An observer on the Moon sees a solar eclipse. and An observer on Earth sees a lunar eclipse.

Explanation:from the moon the sun is completly if not just mostly invisible(solar eclipse) and from earth the moon would be in lunar eclipse from the earth blocking the sun.

Answer:

1.4s

Explanation:

Given parameters:

Mass of ball  = 2kg

Force  = 8N

Time  = 0.35s

Unknown:

Change in velocity  = ?

Solution:

To solve this problem, we use the expression obtained from Newton's second law of motion which is shown below:

      Ft  = m(v  - u)

 So;

         Ft  = m Δv

F is the force

t is the time

m is the mass

Δv is the change in velocity

             8 x 0.35  = 2 x Δv

                  Δv  = 1.4s

Answer:

[tex]\boxed {\boxed {\sf 126 \ Newtons}}[/tex]

Explanation:

According to Newton's 2nd Law of Motion, force is the product of mass and acceleration.

[tex]F=ma[/tex]

The mass is 42 kilograms and the acceleration is 3 meters per square second.

[tex]m= 42 \ kg \\a= 3 \ m/s^2[/tex]

Substitute the values into the formula.

[tex]F= 42 \ kg * 3 \ m.s^2[/tex]

Multiply.

[tex]F= 126 \ kg*m/s^2[/tex]

[tex]F= 126 \ N[/tex]

The object's force is 126 Newtons.