The planets move around the stars in different orbits .which planet will have the shortest of revolution (year)?
Planet 1
Planet 2
Planet 3
Planet 4

Answer:

Convex lenses concentrates the light energy to one spot on the paper so that the heat energy accumulates on that one small spot of paper. ... As the heat increases, combustion will occur when the spot becomes too hot and the paper will burn.

Explanation:

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Answer:

Seeing as how the balloon is mainly negatively charged and the paper being positively charged, the answer would be B: The tissue paper will stick to the balloon because the tissue paper is positively charged!

Answer:

10 kg

Explanation:

Answer:

The force used

Explanation:

This has to be because of the force used. Both Susie and her younger brother might have hit the ball with the same velocity, but they surely couldn't have hit it with the same force. The force with which Susie hurts it is heavier than that with which her younger brother hits it, and as such, Susie gets to fall down more pins than her brother will be able to. The ball has to have a lot of force in it for it to be able to knock off all the pins there. So basically, the more the force, the higher it's chances of hitting all the pins

Answer:

Golf

Explanation:

Golf is NOT considered an invasion game or sport

I believe the answer for 1) is

PEgrav = mass • g • height

PEgrav = m *• g • h

Answer:

The weight of the object X is approximately 3.262 N (Acting downwards)

The weight of the object Y is approximately 8.733 N (Acting downwards)

Explanation:

The question can be answered based on the principle of equilibrium of forces  

The given parameters are;

The weight of Z = 12 N (Acting downwards)

The weight of the pulleys = Negligible

From the diagram;

The tension in the in the string attached to object Z = The weight of object Z = 12 N

The tension in the in the string attached to object X = The weight of the object X  

The tension in the in the string attached to object Y = The weight of the object Y

Given that the forces are in equilibrium, we have;

The sum of vertical forces acting at a point, [tex]\Sigma F_y[/tex] = 0

Therefore;

[tex]T_{1y} + T_{2y} + T_{3y} = 0[/tex]

[tex]T_{1y} = -( T_{2y} + T_{3y} )[/tex]

Where;

[tex]T_{1y}[/tex]  = The weight of object Z = 12 N

[tex]T_{1y}[/tex]  = 12 N

[tex]T_{2y}[/tex] = The vertical component of tension, T₂ = T₂ × sin(24°)

∴  [tex]T_{2y}[/tex] = T₂ × sin(156°)

Similarly;

[tex]T_{3y}[/tex] = T₃ × sin(50°)

From [tex]T_{1y} = -( T_{2y} + T_{3y} )[/tex], and [tex]T_{1y}[/tex]  = 12 N, we have;

12 N = -(T₂ × sin(156°) + T₃ × sin(50°))...(1)

Given that the forces are in equilibrium, we also have that the sum of vertical forces acting at a point, ∑Fₓ = 0

Therefore at point B, we have;

T₁ₓ + T₂ₓ + T₃ₓ = 0

The tension force, T₁, only has a vertical component, therefore;

∴ T₁ₓ = 0

∴ T₂ₓ + T₃ₓ = 0

T₂ₓ = -T₃ₓ

T₂ₓ =  T₂ × cos(156°)

T₃ₓ = T₃ × cos(50°)

From T₂ₓ = -T₃ₓ, we have;

T₂ × cos(156°) = - T₃ × cos(50°)...(2)

Making T₃ the subject of equation (1) and (2) gives;

Making T₃ the subject of equation in equation (1), we get;

12 = -(T₂ × sin(156°) + T₃ × sin(50°))

∴ T₃ = (-12 - T₂ × sin(156°))/(sin(50°))

Making T₃ the subject of equation in equation (2), we get;

T₂ × cos(156°) = - T₃ × cos(50°)

∴ T₃ = T₂ × cos(156°)/(-cos(50°))

Equating both values of T₃ gives;

(-12 - T₂ × sin(156°))/(sin(50°)) = T₂ × cos(156°)/(-cos(50°))

-12/(sin(50°)) = T₂ × cos(156°)/(-cos(50°)) + T₂ × sin(156°)/(sin(50°))

∴ T₂ = -12/(sin(50°))/((cos(156°)/(-cos(50°)) + sin(156°)/(sin(50°))) ≈ -8.02429905283

∴ T₂ ≈ -8.02 N

From T₃ = T₂ × cos(156°)/(-cos(50°)), we have;

T₃ = -8.02× cos(156°)/(-cos(50°)) = -11.3982199717

∴ T₃ ≈ -11.4 N

The weight of the object X = -T₂ × sin(156°)

∴ The weight of the object X ≈ -(-8.02 × sin(156°)) = 3.262 N

The weight of the object X ≈ 3.262 N (Acting downwards)

The weight of the object Y = -(T₃ × sin(50°))

∴ The weight of the object Y = -(-11.4 × sin(50°)) ≈ 8.733 N

The weight of the object Y ≈ 8.733 N (Acting downwards)

Answer:

В. An object with mechanical energy is always able to perform work.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body and it is measured in Joules.

Mathematically, it is given by the formula;

Mechanical energy = G.P.E + K.E

Hence, the true statement is that an object with mechanical energy is always able to perform work.

Answer:

B

Explanation:

Answer:

В. An object with mechanical energy is always able to perform work.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body and it is measured in Joules.

Mathematically, it is given by the formula;

Mechanical energy = G.P.E + K.E

Hence, the true statement is that an object with mechanical energy is always able to perform work.

Answer:

i believe it's the last one

Explanation:

because the first law of thermodynamics states that energy can be changed from one form to another, but it cannot be created or destroyed.

good luck :)

i hope this helps

have a great day !!

Explanation:

Given:

Speed of sound = 1400 m/s

Total time taken = 0.4 seconds

To find:

The depth of water

Solution:

As it take 0.4 seconds for the burst to reach the seabed and return (both ways), we can deduce that it takes 0.2 seconds to reach the seabed (one way).

This is because the speed of sound is a constant.

Now, to find the depth, we use the equation

Speed = Distance/Time

Here, we know the values of speed (1400 m/s) and time (0.2 seconds). Distance is the depth of the water, which we need to find. Let the distance be x.

Therefore

1400 = x/0.2

x = 1400 * 0.2

x = 280 m

We get the depth as 280 metres.

Feel free to ask me if you didn't understand any part.

Hope this helps! :D

Answer:

ok i don't know the answer but I send you tomorrow

Answer:

i dont know about this

Explanation:

Answer: The mesocyclone

Explanation: The unsaturated air, if moved upward, will be cooler than the surrounding air and it will sink. ... This convective action (that is, the circulation of air as a result of heat transfer) produces the huge clouds commonly associated with thunderstorms and tornadoes.

Hopes this help um pls mark me as brainliest

Answer:

what i commented.

Explanation:

Answer:

he relative velocity (also or ) is the velocity of an object or observer B in the rest frame of another object or observer A.

Answer:

a. The thickness of the wire is 2.5 mm.

b. The wire is 0.25 cm thick.

Explanation:

Number of turns of the wire = 10

The length of total turns = 25 mm

a. The thickness of the wire can be determined by;

thickness of the wire = [tex]\frac{length of total turns}{number of turns}[/tex]

                           = [tex]\frac{25}{10}[/tex]

                           = 2.5 mm

Therefore, the wire is 2.5 mm thick.

b. To determine the thickness of the wire in centimetre;

10 mm = 1 cm

So that,

2.5 mm = x

x  = [tex]\frac{2.5}{10}[/tex]

   = 0.25 cm

The wire is 0.25 cm thick.

Answer:

0.013N

Explanation:

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

m=0.04, v=4.4m/s, r=60

F=0.013 N

Answer:

Momentum is the product of the mass and velocity of an object.

[tex]p = m \times v[/tex]

[tex]p = 1000kg \times 20 \frac{m}{s} = 20000kg \times \frac{m}{s} [/tex]

Answer:

G.P.E = 368.3

Explanation:

Given the following data;

Mass = 2.63kg

Height, h = 14.29m

We know that acceleration due to gravity is equal to 9.8m/s²

To find the gravitational potential energy;

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

[tex] G.P.E = mgh[/tex]

Where;

G.P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

[tex] G.P.E = 2.63*9.8*14.29 [/tex]

G.P.E = 368.3

Note: the unit of gravitational potential energy is Joules.

Answer:

solar energy

Explanation:

Please mark as the brainliest.

Answer:

The Name of the heat energy from the is called solar energy.

Answer:

a. Centrifugal force = 1230.77 Newton.

b. Centrifugal force = mv²/r

c. Centrifugal force = 4923.08 Newton.

Explanation:

Given the following data;

Mass = 800kg

Radius = 65m

Velocity = 10m/s

a. To find the force;

Centrifugal force = (800*10²)/65

Centrifugal force = (800*100)/65

Centrifugal force = 80000/65

Centrifugal force = 1230.77 Newton.

b. The force associated with the car is generally referred to as centrifugal force because it's the force required to keep the car in a curved or circular path. It can be calculated using the formula;

Centrifugal force = mv²/r

c. To find the force at twice the speed;

Velocity = 2 * 10 = 20m/s

Centrifugal force = (800*20²)/65

Centrifugal force = (800*400)/65

Centrifugal force = 320000/65

Centrifugal force = 4923.08 Newton.

a. To achieve a car of mass 800 kg goes round a corner of radius 65 m at a            speed of 10 m/s , needed 1230.77 Newton centripetal forces.

b. When an object goes round a corner then centripetal forces keep that object moving in a curved path.

c. When speed is twice. then, 4923.07 Newton centripetal forces needed.

a. Given that car of mass 800 kg goes round a corner of radius 65 m at a

    speed of 10 m/s.

  Centripetal force ,[tex]F=\frac{mv^{2} }{r}[/tex]

  Where m is mass, v is speed of object and r is radius.

   Substituting all values in above equation.

                    [tex]F=\frac{800*10^{2} }{65} =1230.77Newton[/tex]

b. Centripetal force is defined as, the force that is necessary to keep an    object moving in a curved path and that is directed inward toward the center of rotation.

As a car makes a turn, the force of friction acting upon the turned wheels of the car provides centripetal force required for circular motion.

c. When speed is twice, then  [tex]v=10*2=20m/s[/tex]

      Centripetal force,[tex]F=\frac{800*20^{2} }{65} =4923.08Newton[/tex]

Learn more:

https://brainly.com/question/17381741

Answer:

Option C. The force between them would be 4 times larger than with the

initial masses.

Explanation:

To know which option is correct, we shall determine the force of attraction between the two masses when their masses are doubled. This can be obtained as follow:

From:

F = GMₐM₆/ r²

Keeping G/r² constant, we have

F₁ = MₐM₆

Let the initial mass of both objects to be m

F₁ = MₐM₆

F₁ = m × m

F₁ = m²

Next, let the masses of both objects doubles i.e 2m

F₂ = MₐM₆

F₂ = 2m × 2m

F₂ = 4m²

Compare the initial and final force

Initial force (F₁) = m²

Final (F₂) = 4m²

F₂ / F₁ = 4m² / m²

F₂ / F₁ = 4

F₂ = 4F₁ = 4m²

From the above illustrations, we can see that when the mass of both objects doubles, the force between them would be 4 times larger than with the

initial masses.

Thus, option C gives the correct answer to the question.

Answer:

500 kg

Explanation:

using the formula Potential energy (p.e)=mgh where g= acceleration due to gravity whose value is 9.8

so,pe =mgh

622300=m*9.8*127

m=500kg