A 6700-kg boxcar traveling at 16 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.5 m/s . What is the mass of the second car?

Business writing is used in professional formal settings. For example:

In business writing it is expected messages are:

Based on this, clarity and conciseness are important because they make the documents effective.

Note: This question is incomplete because the documents are missing; due to this, I answered it based on general knowledge.

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Yes, it is possible to draw a Gaussian surface to compute the electric field around a charged dipole.

To do so, draw a closed surface that encloses the charges of the dipole and apply Gauss' Law. This will allow you to calculate the electric field at any point on the surface.

The Gaussian surface should be chosen so that it encloses both charges from the dipole, and should be large enough to ensure that the electric field is uniform across the surface. The electric field can then be calculated by using Gauss' Law, which states that the total electric flux through the surface must be equal to the charge enclosed by the surface divided by the permittivity of free space.

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The magnitude of the average force that the water exerts on the diver will be 1895 N after neglecting air resistance .

To solve this problem, we can use the principle of conservation of energy, which states that the initial potential energy of the diver is equal to the final kinetic energy and the work done by the water on the diver. Assuming the water resistance is negligible and the only external force acting on the diver is the force of gravity, we can write:

Initial Potential Energy = Final Kinetic Energy + Work done by water

Mgh = (1/2)Mv² + Fd

where M is the mass of the diver, g is the acceleration due to gravity, h is the height of the tower, v is the velocity of the diver just before hitting the water, d is the distance traveled by the diver underwater, and F is the average force exerted by the water on the diver.

(67.0 kg)(9.81 m/s²)(3.00 m) = (1/2)×(67.0 kg)v² + F(1.10 m)

F = [(67.0 kg)(9.81 m/s²)(3.00 m) - (1/2)(67.0 kg)v²] / (1.10 m)

To find v, we can use the equation of motion for an object in free fall:

v²= 2gh

where g is the acceleration due to gravity and h is the height of the tower. Plugging in the given values, we get:

v² = 2(9.81 m/s²)(3.00 m) = 58.9 m²/s²

Therefore, v = √(58.9 m²/s²) = 7.68 m/s

Substituting this value into the previous equation, we get:

F = [(67.0 kg)(9.81 m/s²)(3.00 m) - (1/2)(67.0 kg)(7.68 m/s)²] / (1.10 m)

F = 1895 N

Therefore, the magnitude of the average force that the water exerts on the diver is 1895 N.

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Answer:

3 767 400 joules

Explanation:

4.186 J/g-C   is the specific heat of water

25  to 115  is 90 degrees C change

10 000 g   is 10 kg of water

10 000 * 90 * 4.186 = 3 767 400 Joules

The net force on an object is zero that is pulled with forces of 80 newtons to the right and 80 newtons to the left.

Net force is equal to sum of all the force acting on a body.

The formula for net force if n force are acting on it:

                       \(F_{net}=F_{1}+ F_{2}+F_{3}.....F_{n}\)

In this case the two forces are equal but opposite in direction.

Putting the values in the formula

\(F_{net} = 80+(-80)\) (since forces are equal but opposite)

\(F_{net}= 0\)

So the net force acting on the object is zero because the forces are equal and opposite.

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The net force on an object that is pulled with forces of 80 newtons to the right and 80 newtons to the left is: 0 newtons

To solve this problem the formula of net force and the procedure that we have to use is:

Fr = ∑F

Where:

Information about the problem:

Applying the resultant force formula we get:

Fr = ∑F

Fr = F1 + F2

Fr = 80 newtons - 80 newtons

Fr= 0 newtons

We can say that the resultant force is the algebraic sum of all the forces acting on a body.

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For this assignment, you will develop several models that show how light waves and mechanical waves are reflected, absorbed, or transmitted through various materials. For each model, you will write a brief description of the interaction between the wave and the material. You will also compose two typewritten paragraphs. The first will compare and contrast light waves interacting with different materials. The second will explain why materials with certain properties are well suited for particular functions.

A wave is any disturbance that carries energy from one place to another. There are two different types of waves: mechanical and electromagnetic. A mechanical wave carries energy through matter. Energy is transferred through vibrating particles of matter. Examples of mechanical waves include ocean waves, sound waves, and seismic waves. Like a mechanical wave, an electromagnetic wave can also carry energy through matter. However, unlike a mechanical wave, an electromagnetic wave does not need particles of matter to carry energy. Examples of electromagnetic waves include microwaves, visible light, X-rays, and radiation from the Sun.

Answer:

Here the other guy is right I’m answering so he can be marked brainliest

Explanation:

An automobile accelerates at the rate of 57 m/s² with a final velocity of 15 m/s. Then, the distance covered by the automobile will be equal to 1.97 meters.

A moving object's speed and orientation vary over time at a certain rate, which is known as acceleration.

An object or location is considered to be accelerated when it moves more quickly or more slowly in a straight path. A circle's motion increases despite its constant speed because its direction is always changing. For all other motions, by and to velocity is used.

Because of its magnitude and direction, it is a vector quantity.

As per the given information in the question,

Acceleration, a = 57 m/s²

Final velocity, v = 15 m/s

Use the equation of motion,

v² - u² = 2as

Put the values in the equation,

15² - 0 = 2(57)(s)

s = 225/114

s = 1.97 meters.

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The given function is f(t)=t3(1−2t2)The velocity of a particle is represented by the derivative of the position of the particle with respect to time. Thus, we need to find the derivative of the given function f(t) to find the velocity of the particle.

Let us differentiate f(t) by using the product and chain rule of differentiation:f(t)=t3(1−2t2)⇒ f′(t)=3t2(1−2t2)+t3(−4t)⇒ f′(t)=3t2−6t4−4t4The velocity of the particle at any given time is the absolute value of the derivative of the position function at that time. Thus, to find the velocity of the particle at t = 1, we will substitute t = 1 in the derivative function:f′(1)=3(1)2−6(1)4−4(1)4=3−6−4=−7.

Therefore, the speed of the particle at t = 1 is 7, which is option C).The definition of speed and velocity:Speed is the magnitude of velocity. It can be calculated as follows:|v|=|dx/dt|Where v is velocity, and x is the position of the object. The absolute value of the velocity of the particle is the speed of the particle.

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Answer:

force pushed the object = 10 × 5 = 50N

The centripetal force (Fc) of the ball is 0.64N.

Centripetal force is the force on a rotating or orbiting body in the direction of the centre of rotation.

Centripetal force is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.

Centripetal force formula is given as the product of mass (in kg) and tangential velocity (in meters per second) squared, divided by the radius (in meters) as follows:

Fc = mv²/r

Where;

According to this question, a boy spins a ball on a string over his head with a rotational velocity of 6.3m/s. The length of the string is 0.50 m and the mass of the ball is 0.008 kg. The centripetal force is as follows:

Fc = 0.008 × 6.3²/0.5

Fc = 0.31752 ÷ 0.5

Fc = 0.64N

Therefore, 0.64N is the centripetal force of the ball.

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Answer:

most potential is someone in an airplane. second is position A, third is position c, fourth is position D, fifth is position B and least potential is a person standing on the ground.

Explanation:

hopefully you understand what I wrote

The mineral group that makes up the largest percentage of rock-forming minerals and comprises over 90% of the earth's crust material is Silicate minerals.

Over 90% of the crust of the Earth is made up of the roughly 1,000 silicate minerals. The largest mineral group by far is the silicate family. The two silicate minerals that are most prevalent are feldspar and quartz. Both minerals are very widespread rock-forming minerals. This pyramid-shaped structure is frequently bonded to additional elements, such as calcium, iron, and magnesium, to produce the great range of silicate minerals. There are six different ways to assemble silica tetrahedrons to produce various silicates. Tetrahedrons can be used singly, in pairs, in single and double chains, in the shape of vast flat sheets of pyramids, or in three-dimensional connections. Atoms from one type of element exclusively are found in native elements. This group of minerals only contains a few minerals.

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Answer: when you increase or decrease your speed.

Explanation:

Moving a skate at rest, you need to apply force in order to cause acceleration.

F = ma Where

F = force applied

m = mass of the skate

a = acceleration

The initial velocity u will be equal to zero and the skate will acceleration to a certain velocity.

as you skate down your neighborhood sidewalk, you will accelerate when you increase your speed. Because

Acceleration is the rate of change of velocity. That is,

Acceleration = change in velocity/ time.

And also, you will decelerate when you reduce the speed or velocity down your neighborhood sidewalk.

Answer:

Since heated materials give off infrared radiation, the warm greenhouse soil, water, sand and other materials emanate this thermal radiation in longer wavelengths than the radiation that heated the materials. A greenhouse gas (GHG) is any gas in the atmosphere that absorbs and emits radiation in the thermal infrared range. These are the fundamental cause of the greenhouse effect, which results in increased temperatures on Earth. Less heat radiates into space, and Earth is warmer.

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True. When a muscle contracts, the actin myofilaments slide past the myosin myofilaments.

This process, called cross-bridge formation, is the basis of skeletal muscle contraction. It occurs when myosin heads bind to actin filaments and create tension, which causes the actin filaments to slide past the myosin filaments and shortens the muscle. The energy for this process is provided by adenosine triphosphate (ATP). Cross-bridge formation is a continuous cycle of the myosin head binding to the actin filament, pulling the filament forward, and then releasing the filament in order to bind to a new site. As this cycle is repeated, the muscle fibers contract.  

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Answer:

40,000 m/s²

Explanation:

The formula is given as Force = mass × acceleration, so then acceleration = Force / mass.

Therefore...

5800 N ÷ 0.145 kg = 40,000 m/s²

The kinetic energy of an object is the energy it possesses due to its motion. In this problem, the car comes to a stop without skidding, meaning that all of its initial kinetic energy is dissipated as work done by the brakes.

The work done by the brakes is given as 50,000 J, and we know that work is equal to the change in kinetic energy. Therefore, the initial kinetic energy of the car is also 50,000 J. This means that the car was moving with a significant amount of energy before the brakes were applied, which highlights the importance of braking systems in ensuring safety on the road.

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Answer:

The maximum speed of the oscillating object doubles as well.

Explanation:

The oscillatory motion of the object on the spring can be modelled using this equation below:

\(Vmax= A\omega\)

Where

Vmax = the maximum speed of the oscillating object.

A = Amplitude of the oscillating object.

\(\omega\) = angular velocity of the oscillating object.

If the amplitude, A becomes doubled, the new amplitude will be = 2A.

As a result,  \(Vmax = 2 A \omega\)

This shows that the maximum speed has doubled in its value

Answer:

I = 2 [amp]

Explanation:

To solve this problem we must use ohm's law, which tells us that the voltage is equal to the product of the current by the resistance.

The resistances in the diagram are connected in series, in this way the total resistance will be equal to the algebraic sum of the resistivity.

R = R1 + R2

R = 3 + 2

R = 5 [ohm]

Now, using ohm's law we have:

V = I*R

where:

V = voltage = 10 [V]

I = current [amp]

R = resistance = 5 [ohm]

I = V/R

I = 10/5

I = 2 [amp]

Answer:

12.78metres

Explanation:

it is a falling body projectile motion that Range

R = VoCosøt but ø= 0 no angle

R = Vot

and t is given by Newton's second eqn as

t=√(2h/g)

thus R=Vo√(2h/g)

upon substitution

R= 12.78

The rocket engine that fires against the direction a spacecraft is headed so the spacecraft slows down is called Retro engine.

Spacecraft are the space automobiles that might be capable of flying out of doors of the Earth’s ecosystem in the area. They offer us a method of transportation from the Earth to the area and objects in it. There may be numerous spacecraft that are familiar to most of people e.g. Apollo 11 which took Neil Armstrong and his group to the Moon.

Crewed Spacecraft – Crewed spacecraft are the ones that carry people to the area. There have been several crewed spacecraft to the area consisting of Vostok 1 – the first crewed spacecraft in records dispatched by way of the United States of America.

Earth-Orbit Satellites – all of the satellites, which orbit across the Earth, fall in this class. The maximum tremendous satellite in orbit on the Earth is Hubble Telescope.

Space Probe – these are unmanned spacecraft that might be fitted with medical instruments for exploring objects in space e.g. planets, Moon, and solar.

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Answer:

Yes.

Explanation:

Food provides units of energy in the form of calories that give our bodies fuel to perform all functions from the most basic like breathing to more complicated activities. We need a minimum amount of calories from food to sustain basic metabolic functions and more to carry out physical activities. The more active we are, the more food we need.

Answer:

yes

Explanation:

because Our body uses energy for all of its functions and food is the main source of energy. Food contains nutrients that when broken down in the gastrointestinal tract release energy that can be used by the body's cells, tissues and organs for normal function, growth and repair.

A heat engine is operating between 287 c and 32 c. if the engine extracted 400 mj of energy from fuel, 4109.6 Jews mj of energy could be used as mechanical energy

Using the temperatures, a heat engine's efficiency is determined (lowest and highest).

The ratio of the system's provided heat to the desired work is considered the system efficiency. An engine's efficiency ranges from 0 to 1.

The efficiency of the engine is 27%, or 0.27. Since the heat was turned down due to the 3000 gems, we must find productive employment. Heat input and network efficiency are connected. That is the line. Qc was rejected by two W plus heat, leading to Qh. The cost of networking is composed of Nita W and Nita Qc. The network completed is identical to Nita. Q C is split into two halves. As a result, we must divide our efficiency, which is 0.27, by 3000. The engine's work is represented by this. Let's calculate the result of 0.27 multiplied by 3000 divided by 1. 1109 and 0.6 gems are the answer. He rejected our quote, which is +110 9.6 plus three thousand. 4109.6 Jews is quite close to the heat input.

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a) 52.0 V battery and 14.0 Ω and 68.0 Ω resistors, find the current (in A) and power (in W) for each when connected in series:

a) I14.0 Ω = 3.71 A

P14.0 Ω = 192.92 W

I68.0 Ω = 0.765 A

P68.0 Ω = 39.78 W

b) Repeat when the resistances are in parallel:

I14.0 Ω = 3.71 A

P14.0 Ω = 192.92 W

I68.0 Ω = 0.765 A

P68.0 Ω = 39.78 W

(a) When resistors are connected in series, the current passing through each resistor is the same.

Using Ohm's Law, we can calculate the current (I) and power (P) for each resistor:

For the 14.0 Ω resistor:

I14.0 Ω = V / R = 52.0 V / 14.0 Ω = 3.71 A

P14.0 Ω = I14.0 Ω * V = 3.71 A * 52.0 V = 192.92 W

For the 68.0 Ω resistor:

I68.0 Ω = V / R = 52.0 V / 68.0 Ω = 0.765 A

P68.0 Ω = I68.0 Ω * V = 0.765 A * 52.0 V = 39.78 W

Therefore:

I14.0 Ω = 3.71 A

P14.0 Ω = 192.92 W

I68.0 Ω = 0.765 A

P68.0 Ω = 39.78 W

(b) When resistors are connected in parallel, the voltage across each resistor is the same.

Using Ohm's Law, we can calculate the current (I) and power (P) for each resistor:

For the 14.0 Ω resistor:

I14.0 Ω = V / R = 52.0 V / 14.0 Ω = 3.71 A

P14.0 Ω = I14.0 Ω * V = 3.71 A * 52.0 V = 192.92 W

For the 68.0 Ω resistor:

I68.0 Ω = V / R = 52.0 V / 68.0 Ω = 0.765 A

P68.0 Ω = I68.0 Ω * V = 0.765 A * 52.0 V = 39.78 W

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Answer:B

Explanation:

Being familiar with the different types of galaxies that exist in the universe is the action which might lead the scientists to develop new explanations about the universe. Thus, the correct option is D.

Many religious person, including many great scientists, hold that the God has created the universe and the various processes which are the driving physical and biological evolution and that these processes then resulted in the creation of the different galaxies, the solar system, and life on the planet Earth.

The Big Bang theory states that the universe came into being from a single, unimaginably hot and dense point more than about 13 billion years ago. This did not occur in an already existing space. Rather, it initiated from the expansion and cooling of space itself.

Therefore, the correct option is D.

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Answer:

Both particle and wave properties

Explanation:

Light is defined as a particle and a wave, and even as a combination of a particle and a wave. A unit of light is the photon. Higher energy photons behave like particles and low energy photons behave like waves.

Experiments performed with light indicate that light exhibits both particle and wave properties.

Answer:

32

Explanation:

When the speed of a car increases by a factor of 50%, the minimum braking distance will also be increased by a factor.

Braking distance will increase by a factor  2.25

Solution

From Newton's equation of motion, we can say that;

v² = u² + 2as

Where initial velocity is zero, we have;

v² = 2as

s = v²/2a

s is the distance and v is the final speed.

50% increase in speed means it has increased by a factor of 1.50

Hence we have

1.50²v² is directly proportional to the 1.50²d

Distance = 1.50²v² = 2.25d

Hence, breaking distance will increase by a factor 3.0625

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The input voltage is 120 V and the transformer is a step up transformer due to increase in the voltage induced in the secondary coil.

The input voltage of the transformer is the voltage of the primary coil and it is calculated as follows;

Ns/Np = Es/Ep

where;

2X/X = 240/Ep

2 = 240/Ep

Ep = 240/2

Ep = 120 V

Thus, the transformer is a step up transformer due to increase in the voltage induced in the secondary coil.

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The correct answer is centripetal force keeps electrons in orbit around the nucleus.

What is Rutherford model?

Rutherford Atomic Model - J. J. Thomson's "plum pudding" model was unable to account for some experimental findings related to the atomic structure of elements. British scientist Ernest Rutherford carried out an experiment, and using the results of this experiment, he proposed Rutherford's Atomic Model and explained the atomic structure of the elements.

Thus, in the Rutherford model, the centripetal force that maintains the electron in orbit is produced by the electrostatic attraction between the (positive) nucleus and the (negative) electron.

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