Which of the following can break solid rock

Answer:

mechanical energy

Explanation:

Answer:

When you fill it up its chemical energy but it gets transformed into mechanical energy.

Explanation:

The internal combustion engine, which is utilized in most automobiles, has allowed for the transfer of chemical energy into mechanical energy. This provides locomotion for the vehicle as it is driving.

Answer:

228 m/s

Explanation:

f = 32 Hz

λ = 9 m

v = ?

v = f λ

v = (32 Hz) (9 m)

v = 288 m/s

Answer: the velocity is not changing bc the speed is constant

Explanation:

A student rides the Ferris wheel when visiting an amusement park. She moves at a constant speed of 3 m/s which means that the velocity is not changing because the speed is constant.

The overall distance the object covers in a given amount of time is its average speed. The scalar quantity represents the average speed. It does not have direction; it is represented by magnitude.

Average Speed = [tex]total\ distance/total\ time[/tex]

Average velocity is a vector quantity. The change in position or displacement divided by the periods during which the displacement happens is known as average velocity. Depending on how the displacement is displaced, the average velocity may be positive or negative. Meters per second (m/s), the SI unit of average velocity, is used.

According to the question, she is moving at a constant speed of 3 m/s means that the velocity is constant, and its acceleration will also be equal to zero because there is no change in velocity then acceleration is zero.

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Answer:

60N

Explanation:

Given parameters:

Combined mass = 50kg

Acceleration  = 1.2m/s²

Unknown:

Force to propel  = ?

Solution:

From Newton's second law of motion, we know that;

       Force  = mass x acceleration

 So;

         Force  = 50 x 1.2  = 60N

Answer:

60N

Explanation:

Answer:

μ = 0.391

Explanation:

The friction force is defined as the product of the coefficient of friction by the normal force. In this way, we have the following equation.

F = μ*N

Where:

F = friction force = 403 [N]

μ = static coefficient

N = Normal force [N]

And the normal force of a body lying on a horizontal surface can be calculated by means of the product of mass by gravitational acceleration.

[tex]N=m*g\\N=105[kg]\\g=9.81 [m/s^{2} ]\\N=105*9.81\\N=1030.05[N][/tex]

Now we can clear the  static coefficient

[tex]403=u*1030.05\\u=0.391[/tex]

Answer:

the average speed on this trip is 75 km/h

Answer:

75 km/h

Explanation:

Answer:

Time = 600 seconds

Explanation:

Given the following data;

Power = 60W

Energy = 36000

To find the time;

Energy = power * time

Substituting into the equation, we have;

36000 = 60 * time

Time = 36000/60

Time = 600 seconds.

Therefore, the bulb was on for 600 seconds.

Answer: Work is done when a spring is extended or compressed . Elastic potential energy is stored in the spring. The elastic potential energy stored can be calculated using the equation: elastic potential energy = 0.5 × spring constant × (extension) 2.

Explanation: can you please mark me as brainliest

Answer:

James Clerk Maxwell

Who observed and discovered the electromagnetic field concept? Many physicists experimented with electromagnetic fields, but it was James Clerk Maxwell who discovered that they are actually electromagnetic in nature and they (at the classical level) are accurately described by his famous equations.

Explanation:

Answer:

B: It is moving north.

Explanation:

We are told that a train is moving with a velocity of 70 km/h.

Now, we are also told that the positive direction is north.

This means that the train is moving in the northern direction.

We can't say if it is speeding up or not because we are not given the acceleration.

Thus, option B is correct

Answer:

It is moving north.

Explanation:

I took the test.

Answer:

B - The model does not move or behave like a real atom.

Explanation:

The solid ball does not show how the nucleus is composed of protons and neutrons, or the relationship between the electrons and the nucleus.

Answer:

2.5m/s²

Explanation:

Given the following:

Initial velocity u = 0m/s

Final velocity v = 20m/s

Time t = 4s

Required

average acceleration over this time in time interval​

Using the equation of motion

v = u + at

10 = 0 + a(4)

10 = 4a

a = 10/4

a = 2.5m/s²

Hence its average acceleration over this time in time interval​ is 2.5m/s²

Answer:

the velocity of the car is 30 m/s.

Explanation:

Given;

Centripetal force on the car, F = 900 N

mass of the car, m = 10 kg

diameter of the circular path, d = 20 m

radius of the circular path, r = 10 m

The velocity of the car is calculated as follows;

[tex]F = \frac{mv^2}{r} \\\\mv^2 = Fr\\\\v^2 = \frac{Fr}{m} \\\\v = \sqrt{\frac{900 \times 10}{10} } \\\\v = 30 \ m/s[/tex]

Therefore, the velocity of the car is 30 m/s.

Answer:

Newtons first law states that:

If a body is in rest or motion in a straight line, it remains at rest or at motion in a straight line with constant speed until and unless and external unbalanced force acts on it.

'This law is also known as the law of Inertia.'

Answer:

15m

Explanation:

change in real depth = 80 - 60 = 20m

Let us assume that the index is 4/3

Refractive index = change in real depth ÷ change in apparent depth

change in apparent depth = change in real depth÷ refractive index

= 20÷(4/3) = 20×(3/4) = 5×3 = 15m

The solubility of the salt. : 24 g/100 g solvent(water)

Given

48 gram of a salt in 200 gram of water at 35°C

Required

The solubility of the salt.​

Solution

Solubility : the amount of a substance that can be dissolved in a solvent

Can be formulated(for 100 g solution)⇒grams solute per 100 g of solvent(100 ml water)

[tex]\tt solubility=\dfrac{mass~solute}{mass~solvent}\times 100[/tex]

Input the value :

[tex]\tt solubilty=\dfrac{48~}{200~g}\times 100=24~g[/tex]

Answer:

The maximum height is determined by the initial vertical velocity. Since steeper launch angles have a larger vertical velocity component, increasing the launch angle increases the maximum height.

Explanation:

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Answer:

14 x 0.27 = 3.78 is your answer

Explanation:

the question is asking for the weight of the object so you multiply and get 3.79

Answer:

B. distillation

Explanation:

The technique that will separate the components of crude oil based on their boiling points is distillation.

Fractional distillation is the approach used by oil industries to separate the different components of crude oil.

Answer:

option D is correct

Explanation:

cl has 17 electrons if it has 18 it becomes cl-

The particle that is negatively charged is Chlorine (CI) with 17 protons, 18 neutrons, and 18 electrons. The correct option is D.

An ion is a gross electrically charged molecule or atom. By convention, the charge of an electron is considered to be negative, and this charge is equal to and opposite to the charge of a proton, which is considered to be positive.

These are found in a wide range of instruments, including mass spectrometers, optical emission spectrometers, particle accelerators, ion implanters, and ion engines.

They are also used in air purification by disrupting microbes, as well as in household items such as smoke detectors, as reactive charged particles.

When particles acquire or lose electrons, ions form. Because electrons are negatively charged, losing one or more electrons causes an atom to become positively charged; gaining one or more electrons causes an atom to become negatively charged.

Thus, the correct option is D.

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Answer:

Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion

Explanation:

Answer:   oa

Explanation:

Answer:

0.407 kg

Explanation:

Given :

Coefficient of static friction, µs = 0.276

Force, F = 1.1 N

Using the relation :

μ = F/N

N = normal reaction ; N = mg

μ = F / mg

g = acceleration due to gravity = 9.8 m/s²

0.276 = 1.1 / m * 9.8

0.276 = 1.1 / 9.8m

0.276 * 9.8m = 1.1

2.7048m = 1.1

m = 1.1 / 2.7048

m = 0.4066844

Mass = 0.407 kg

Answer:

The answer is 4.0 m

Explanation:

Answer:

B) 4.0

Explanation:

Jus took the test on E D G E

Answer:

2 per s

Explanation:

divid 40 and 20 it gives you = 2

Answer:

2m in 4s

Explanation:

Answer:

v = 15,267 m/s

Explanation:

Kinetic Energy

Is the type of energy of an object due to its state of motion. It's proportional to the square of the speed.

The formula to calculate the kinetic energy is:

[tex]\displaystyle K=\frac{1}{2}mv^2[/tex]

Where:

m = mass

v = speed

The kinetic energy is often expressed in Joules (J)

We are given the mass of a fly m=0.638 g and we need to calculate its speed in order to have a kinetic energy of 74354.5 J.

Converting:

m=0.638 g /1000 = 0.000638 kg

To find the speed, we solve the formula for v:

[tex]\displaystyle v=\sqrt{\frac{2K}{m}}[/tex]

[tex]\displaystyle v=\sqrt{\frac{2K}{m}}[/tex]

Substituting:

[tex]\displaystyle v=\sqrt{\frac{2*74354.5}{0.000638}}[/tex]

v = 15,267 m/s

(The fly should move faster than a rocket)

Answer:

180Ns

Explanation:

Given parameters:

Force applied  = 90N

Velocity  = 15m/s

Time taken  = 2s

Unknown:

Impulse applied to the cart  = ?

Solution:

The impulse is effect of force acting on a body through time.

 It is mathematically expressed as;

 Impulse  = Force x time

 So;

 Impulse on the car  = 90 x 2  = 180Ns

Answer:

I think u have to do 580N times 40KG

Answer: DONT MULTIPLY, YOU DIVIDE THEM

Explanation:

F = mass x acceleration

580 N = (40 kg)(a)

580/40 = 14.5

a = 14.5 m/s²

Answer:

1470J

Explanation:

Given parameters:

Mass of the block  = 30kg

Height  = 5m

Unknown:

Gravitational potential energy  = ?

Solution:

The Gravitational potential energy of body is due to its position above the ground level.

 Gravitational potential energy  = mass x acceleration due to gravity x height

So;

Gravitational potential energy  = 30 x 9.8 x 5 = 1470J