Which of these objects has kinetic energy?

Answer:

before this type of attack, high acceleration is the most important thing.

Explanation:

As the zebra is ambushed by the crocodile the most important thing is a quick reaction, in this attack the most likely is that the crocodile is in the water so it cannot run after the zebra.

Consequently, before this type of attack, high acceleration is the most important thing.

Thus Kinetic energy of the object is 200J when mass is 25 kg and velocity is 4 m/s.

Answer:

no i haven't. i will

Explanation:

Answer:

same

step by step explanation:

Answer:

a. 4.99 × 10⁻⁴ N b. 1.46 × 10⁻³ N c. 4.83 nC

Explanation:

(a) Find the magnitude of the electric force acting on each ball.

The tension in the string, T is resolved into horizontal and vertical components Tsin20° and Tcos20° respectively, since the string makes an angle of 20° with the vertical.

Let F = electric force and W = mg be the weight of the ball where m = mass of ball = 0.14 g = 0.14 × 10⁻³ kg and g = acceleration due to gravity = 9.8 m/s²

The electric force acts in the opposite direction to the horizontal component of the tension in each string. Since the masses are in equilibrium,

Tsin20° = F (1)

Also, the weight of the ball acts downwards, opposite to the direction of the vertical component of the tension in the string. Since the masses are in equilibrium,

Tcos20° = W = mg

Tcos20° = mg (2)

Dividing (1) by (2), we have

Tsin20°/Tcos20° = F/mg

tan20° = F/mg

F = mgtan20°

So, F = 0.14 × 10⁻³ kg × 9.8 m/s²× tan20°

F = 0.4994 × 10⁻³ N

F = 4.994 × 10⁻⁴ N

F ≅ 4.99 × 10⁻⁴ N

(b) Find the tension in each of the threads.

Since  Tsin20° = F

T = F/sin20°

=  4.99 × 10⁻⁴ N/sin20°

= 4.99 × 10⁻⁴ N/0.3420

= 14.59 × 10⁻⁴ N

= 1.459 × 10⁻³ N

≅ 1.46 × 10⁻³ N

(c) Find the magnitude of the charge on the balls.

From Coulomb's law, the electric force between the masses of charge q and separated by a distance r = 2.05 cm = 2.05 × 10⁻² m

F = kq²/r² where k = 9.0 × 10⁹ Nm²/C²

q² = Fr²/k

q = √(Fr²/k)

q = [√(F/k)]r

Thus,  

q = [√(F/k)]r

q = [√( 4.99 × 10⁻⁴ N/9.0 × 10⁹ Nm²/C²)]2.05 × 10⁻² m

q = [√(0.5544 × 10⁻¹³ C²/m²)]2.05 × 10⁻² m

q = [√(5.544 × 10⁻¹⁴ C²/m²)]2.05 × 10⁻² m

q = [2.355 × 10⁻⁷ C/m]2.05 × 10⁻² m

q = 4.83 × 10⁻⁹ C

q = 4.83 nC

Answer: Heat transfer due to emission of electromagnetic waves is known as thermal radiation.

Explanation: Heat transfer through radiation takes place in form of electromagnetic waves mainly in the infrared region. Radiation emitted by a body is a consequence of thermal agitation of its composing molecules.

Answer: Thermal Radiation is the right answer.

Explanation:

Answer:

0.8sec

Explanation:

Σf= 7.5-5= 2.5 N to the left

Σf=m*a=>2.5=2a=>a=1.25 m/s²

Lets say that the speed is 1m/s

a=speed-0/x=>x=1/1.25=>x=0.8

Hence the time will be 0.8sec

Answer:

5. 343j

Explanation:

Answer:

fiction

Explanation:

When two opposite forces act perpendicular to an axis, it causes rotational motion or torque.

Torque and couple are both related to rotational motion and are often used interchangeably, but they refer to slightly different concepts.

Torque is a measure of the force that causes an object to rotate around an axis or pivot point.

It is equal to the force applied multiplied by the perpendicular distance between the axis and the line of action of the force. Torque is a vector quantity, meaning it has both magnitude and direction. Its unit of measurement is Newton-meters (Nm) or foot-pounds (ft-lbs) in the English system.

A couple, on the other hand, is a pair of equal and opposite forces that act on a body but do not cause it to translate. Instead, they create a pure rotational motion.

A couple generates torque, but unlike a single force, it doesn't have a line of action or a specific point of application. Instead, a couple is characterized by its magnitude and the distance between the forces. Couples are often used in mechanics to model rotational systems and analyze the behavior of rotating bodies.

Torque is the measure of the force that causes rotational motion, while a couple is a pair of forces that create pure rotational motion without causing any translation.

Therefore, If two opposite forces act perpendicular to an axis, it causes rotational motion or torque.

To learn more about torque click:

https://brainly.com/question/17816858

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Under the Big Top elephant, Ella (2500 kg), is attracted to Phant, the 3,000 kg elephant. They are separated by 8

hope this helps you !

Answer:

It is called reverberation.

Explanation:

The phenomenon of prolongation of sound is the process in which sound produced is reflected from plane surfaces in a continuous manner, which leads to reverberation of sound waves. It can also be referred to as a condition of continuous echo production.

It occurs when sound produced get reflected from a hard plane surface, and in the process hits another surface and another reflection occurs. This continuous reflection leads to prolongation of sound.

The sound produced is heard for some specific period of time before it dies down or get absorbed finally.

Answer:

ghj

Explanation:

Answer:

C

Explanation:

The other answers don’t make sense

Answer:

See the answer below

Explanation:

The literal meaning for infinitesimal is for something to be small.

Other meanings include, but not limited to minute, insignificant, tiny, microscopic, minuscule.

Thus, the statement can be reconstructed by saying:

Compared to the amount of carbon atoms on the earth, the amount of radioactive carbon atoms is small.

Answer:

Friction

Explanation:

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

Answer:

360km/hr=360×1000m

a 1×60×60s

=360 000

3600

=100m/s²

PLEASE GIVE BRAINLIEST

2,945.04

2,945.04 to 2d.p

2945 as a whole number

Answer:

200 N/m²

Explanation:

Pressure = Force / Area

Force =100N

Area = 100cm x 50 cm= 5000cm² =0.5m²

Hence Pressure = 100N / 0.5m²

Pressure = 200N/m²

Answer: True

Explanation: Hope this helps :)

See the attached diagram for reference and free body diagrams. The acceleration a of each body will be the same since each connecting string is in tension.

By Newton's second law, we have

• net force on the train:

- - horizontal

[tex]\sum F = F - F_{k,T} - T_1 = m_Ta[/tex]

(where F = 12 N)

- - vertical

[tex]\sum F = N_T - m_Tg = 0[/tex]

• net force on wagon 1:

- - horizontal

[tex]\sum F = T_1 - T_2 - F_{k,1} = m_1a[/tex]

- - vertical

[tex]\sum F = N_1 - m_1g = 0[/tex]

• net force on wagon 2:

- - horizontal

[tex]\sum F = T_2 - F_{k,2} = m_2a[/tex]

- - vertical

[tex]\sum F = N_2 - m_2g = 0[/tex]

We want to determine T₂, the tension in the string connecting the two wagons.

For each body, the corresponding normal force has magnitude

N = mg

where m is the respective mass, and the kinetic friction has magnitude

Friction = 0.05 N = 0.05mg

So if µ = 0.05, then the frictional force on each body is

[tex]F_{k,T} = 0.05 (2.7\,\mathrm{ kg}) g = 1.323\,\mathrm N[/tex]

[tex]F_{k,1} = 0.05 (1.8\,\mathrm{ kg}) g = 0.882\,\mathrm N[/tex]

[tex]F_{k,2} = 0.05 (1.0\,\mathrm{ kg}) g = 0.49\,\mathrm N[/tex]

which leaves us with the system of equations,

[1] … 12 N - 1.323 N - T₁ = (2.7 kg) a

[2] … T₁ - T₂ - 0.882 N = (1.8 kg) a

[3] … T₂ - 0.49 N = (1.0 kg) a

Adding [1] and [2] eliminates T₁ :

(12 N - 1.323 N - T₁) + (T₁ - T₂ - 0.882 N) = (2.7 kg) a + (1.8 kg) a

[4] … 9.795 N - T₂ = (4.5 kg) a

Divide through both sides of [3] by 1.0 kg to solve for a :

a = (T₂ - 0.49 N) / (1.0 kg)

Substitute this into [4] and solve for T₂ :

9.795 N - T₂ = (4.5 kg) (T₂ - 0.49 N) / (1.0 kg)

(9.795 N - T₂) (1.0 kg) = (4.5 kg) (T₂ - 0.49 N)

9.795 N - T₂ = 4.5 T₂ - 2.205 N

12 N = 5.5 T₂

T₂ = (12 N) / 5.5 ≈ 2.1818 N ≈ 2.2 N

Answer:

for your first question it is the first answer that is there for your second question it is the second answer that is there

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

Answer:

I think the correct answer would be the third option. As the elements around the star begins to emit more and more electromagnetic radiation, the rocky materials are pulled in by the electromagnetic radiation. They are being drawn closer to the star and there would be a very high chance of a nuclear

Explanation:

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

Answer:

B

Explanation:

Answer:

greater than

Explanation:

thats my answer