a train is running at a speed of 72 km per hour how long will it take to cover a distance of 300 km​

The average force exerted by the bat on the ball will be 2571.6 N (newtons).

To find the average force exerted by the bat on the ball, we need to use the formula:

Average force = impulse / time

Where impulse is the change in momentum of the ball, and time is the duration of contact between the bat and the ball.

Assuming that the ball is initially at rest and the bat imparts all the momentum to the ball, we can write:

Impulse = final momentum - initial momentum
       = m*v - 0

Where m is the mass of the ball, and v is its final velocity after being hit by the bat.

Since we don't know the value of v, we need to use the conservation of energy principle to relate it to the initial speed of the ball and the speed of the bat:

(m/2)*v^2 = (m/2)*u^2

Where u is the speed of the bat before hitting the ball.

Solving for v, we get:

v = u*sqrt(2)

Substituting this into the impulse formula, we get:

Impulse = m*u*sqrt(2)

Finally, we can plug in the given values and solve for the average force:

Average force = impulse / time
             = (m*u*sqrt(2)) / 0.00207
             = (0.145 kg * 24 m/s * sqrt(2)) / 0.00207 s
             = 2571.6 N

Therefore, the average force exerted by the bat on the ball is 2571.6 N (newtons).

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Answer:

It should be fibre optic cable , buried underground

Series connection is advantageous over parallel connection as a parallel circuit consumes more power than a series circuit.

While the voltage across each appliance is the same in a parallel connection, the current passing through each appliance is different in a series connection. A parallel circuit also consumes more energy than a series circuit despite being more dependable.

The quantity of current flowing through each of the circuit's components is the primary distinction between a parallel and a series circuit. The quantity of current flowing through each component in a series circuit is the same.

In comparison to a parallel circuit, a series circuit extends the battery's life. Compared to parallel or series-parallel wiring, this technique of electrical wiring is the most straightforward, and errors are much easier to spot and fix.

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Answer:

  15.8 N

Explanation:

The component in a given direction is the magnitude of the applied force, multiplied by the cosine of the angle between its application and the direction of interest.

The horizontal component is ...

  (20 N)cos(38°) ≈ 15.8 N

A string exerts a force of 20 N on a box at an angle of 38° from the horizontal. What is the horizontal component of the force on the box?

15.8 N

Waveform shaping is a solution that involves adding a pre-distortion filter to the transmitter circuit. The resulting waveform is narrower and more accurate. For differential signaling systems, pre-emphasis and de-emphasis filters can be used.

The "lonely pulse" waveform is a signal integrity issue caused by reflections and interference in digital communication systems. The waveform appears as a single pulse that is wider and distorted compared to the original pulse.

To solve this problem, waveform shaping can be used, which involves adding a pre-distortion filter to the transmitter circuit. This filter modifies the pulse shape to compensate for the distortion during transmission, resulting in a more accurate pulse shape at the receiver. The resulting waveform is narrower, more accurate, and has reduced overshoot and undershoot.

For a differential signaling system, the technique can be implemented using pre-emphasis and de-emphasis filters at the transmitter and receiver, respectively. The implementation is simple and requires only passive components, such as resistors and capacitors. This technique compensates for frequency-dependent attenuation and distortion and results in a more accurate pulse shape at the receiver.

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Answer:

Scientists are developing techniques to detect signatures from space in their search for alien life.

The Very Large Array (VLA) telescope, at the National Radio Astronomy Observatory (NARO) site in Socorro, New Mexico, will be used to constantly seek evidence of technosignatures.

Hope this helps

The sun's thermal energy serves as the primary energy source for producing atp during the photosynthesis process. Essentially, it serves as the primary catalyst for all metabolic processes in plants. Protons diffusing through the F0 section of ATP synthase

All living things contain the energy-carrying molecule adenosine triphosphate (ATP) in their cells. When food molecules are broken down, chemical energy is released that is captured by ATP and used to power other cellular operations.

To drive metabolic events that would not happen naturally, to transfer necessary molecules across membranes, and to do mechanical labor, such as moving muscles, cells need chemical energy.

Chemical energy cannot be stored by ATP; lipids and carbohydrates such as glycogen serve this purpose. ATP is created when energy from storage molecules is required by the cell.

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Answer:

Answer:- Volume of the balloon is 5.78 L.

Solution:- There are 0.24 moles of hydrogen gas in a balloon at 35 degree C and 1.05 atm pressure. It asks to calculate the volume of the balloon.

This problem is based on ideal gas law equation:

P = 1.05 atm, n = 0.24 mole, T = 35 + 273 = 308 K

R =

V = ?

The equation could be rearranged for the volume as:

Let's plug in the values and do the calculations to get the volume of the balloon:

V = 5.78 L

So, the volume of the gas balloon is 5.78 L.

Answer:

mechanical energy

Explanation:

it is a vector energy

Answer:

You spent 1680000 cents, or $16,800

If a bullet moving at 100 m/sec, mass 100 grams, strikes a block of wood hanging from a light rope 3.0 meters long. the bullet sticks in the block and they swing to an angle of 30 degrees from the vertical. Then the mass of the block must be approximately 0.424 kg for the given conditions.

To solve this problem, we can use the conservation of momentum and conservation of energy principles. Let's start by finding the initial momentum of the bullet:

p = mv = 0.1 kg x 100 m/s = 10 kg m/s

After the collision, the bullet and the block of wood move together as one object. Let the mass of the block be "M". The final velocity of the combined object can be found using conservation of momentum:

p = (m + M) v_final

where v_final is the final velocity of the combined object. Since the bullet is lodged in the block, we can assume that the final velocity is much smaller than the initial velocity of the bullet (i.e. v_final << 100 m/s). Therefore, we can neglect the mass of the bullet compared to the mass of the block and write:

v_final = p / M

Next, we can use conservation of energy to find the height the block rises to after the collision. At the top of its swing, all of the initial kinetic energy of the bullet-block system will have been converted into gravitational potential energy:

1/2 (m + M) v_final² = (m + M) g h

where g is the acceleration due to gravity (9.81 m/s²) and h is the height the block rises to. Substituting the expression for v_final from the momentum equation gives:

1/2 p² / M² = (m + M) g h

Solving for M, we get:

M = p^2 / (2 g h)

Substituting the given values, we get:

M = (10 kg m/s)² / (2 x 9.81 m/s² x 3.0 m x sin(30 degrees)) = 0.424 kg

Therefore, the mass of the block must be approximately 0.424 kg for the given conditions.

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Answer:

cellular respiration , note how it says oxygen

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 75 × 35

We have the final answer as

Hope this helps you

Answer:

Explanation:

Visible light has a wavelength that ranges from 380 nm – 750 nm on the electromagnetic spectrum while infrared light is just beyond it, ranging from 700 nm – 1 mm, the start of the non-visible portion of the spectrum. As a result, infrared cannot be seen except with special equipment like a security camera

Visible light is the common lighting method and we see it all around us. It is used in homes, work areas, factory floors, parking lots, loading docks, etc. They are also used as warning systems and to provide lighting for CCTV cameras in public places. The presence of floodlights warns intruders that their actions are being monitored.

Infrared light, however, is used when the intention is to monitor intruders covertly. Without a bright light to warn them about the presence of security cameras, intruders no longer feel the need to avoid surveillance, leaving them exposed to the IR-illuminated cameras.

Answer:

1. For humans, we can only see visible light, but can't see infrared.

2. Infrared have longer wavelengths than visible light.

Answer:

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.[1] The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.[2][3]

The boundary of the region from which no escape is possible is called the event horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, according to general relativity it has no locally detectable features.[4] In many ways, a black hole acts like an ideal black body, as it reflects no light.[5][6] Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe directly.

Objects whose gravitational fields are too strong for light to escape were first considered in the 18th century by John Michell and Pierre-Simon Laplace.[7] The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958. Black holes were long considered a mathematical curiosity; it was not until the 1960s that theoretical work showed they were a generic prediction of general relativity. The discovery of neutron stars by Jocelyn Bell Burnell in 1967 sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality.

Black holes of stellar mass are expected to form when very massive stars collapse at the end of their life cycle. After a black hole has formed, it can continue to grow by absorbing mass from its surroundings. By absorbing other stars and merging with other black holes, supermassive black holes of millions of solar masses (M☉) may form. There is consensus that supermassive black holes exist in the centers of most galaxies.

The presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light. Matter that falls onto a black hole can form an external accretion disk heated by friction, forming quasars, some of the brightest objects in the universe. Stars passing too close to a supermassive black hole can be shred into streamers that shine very brightly before being "swallowed."[8] If there are other stars orbiting a black hole, their orbits can be used to determine the black hole's mass and location. Such observations can be used to exclude possible alternatives such as neutron stars. In this way, astronomers have identified numerous stellar black hole candidates in binary systems, and established that the radio source known as Sagittarius A*, at the core of the Milky Way galaxy, contains a supermassive black hole of about 4.3 million solar masses.

On 11 February 2016, the LIGO Scientific Collaboration and the Virgo collaboration announced the first direct detection of gravitational waves, which also represented the first observation of a black hole merger.[9] As of December 2018, eleven gravitational wave events have been observed that originated from ten merging black holes (along with one binary neutron star merger).[10][11] On 10 April 2019, the first direct image of a black hole and its vicinity was published, following observations made by the Event Horizon Telescope in 2017 of the supermassive black hole in Messier 87's galactic centre.[12][13][14]

Blackness of space with black marked as center of donut of orange and red gases

The supermassive black hole at the core of supergiant elliptical galaxy Messier 87, with a mass about 7 billion times that of the Sun,[15] as depicted in the first false-colour image in radio waves released by the Event Horizon Telescope (10 April 2019).[16][12][17][18] Visible are the crescent-shaped emission ring and central shadow,[19] which are gravitationally magnified views of the black hole's photon ring and the photon capture zone of its event horizon. The crescent shape arises from the black hole's rotation and relativistic beaming; the shadow is about 2.6 times the diameter of the event horizon.[12]

Schwarzschild black hole

Simulation of gravitational lensing by a black hole, which distorts the image of a galaxy in the background

Gas cloud being ripped apart by black hole at the centre of the Milky Way (observations from 2006, 2010 and 2013 are shown in blue, green and red, respectively).[20]

Answer:

Imprinting is a form of learning in which an animal gains its sense of species identification. Birds do not automatically know what they are when they hatch – they visually imprint on their parents during a critical period of development. After imprinting, they will identify with that species for life.

Explanation:

Answer:

read explanation

Explanation:

Due to this reason a gas (air) a conductor of electricity at low pressure. ... It is because when the gas is at very low pressure positive charged ions are not available to eject out the electron from the cathode hence the discharge current stops.No, vacuum cannot conduct electricity.

The force should be applied at an angle of approximately 34.6 degrees with respect to the handle.

The torque produced by a force applied to a lever arm is given by the equation:

Torque = Force × Lever Arm × sin(θ)

Where Torque is the torque produced, Force is the applied force, Lever Arm is the length of the lever arm, and θ is the angle between the force and the lever arm.

Rearranging the equation, we have:

sin(θ) = Torque / (Force × Lever Arm)

Plugging in the given values:

sin(θ) = 0.56 Nm / (11 N × 0.091 m)

sin(θ) ≈ 0.559

To find the angle θ, we take the inverse sine (sin⁻¹) of 0.559:

θ ≈ sin⁻¹(0.559)

θ ≈ 34.6 degrees

Therefore, the force should be applied at an angle of approximately 34.6 degrees with respect to the handle.

To achieve a torque of 0.56 Nm with an applied force of 11 N and a spanner length of 9.1 cm, the force should be applied at an angle of approximately 34.6 degrees with respect to the handle. This angle ensures that the force component perpendicular to the lever arm generates the desired torque.

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I = 0.00744 A (Amps)

Hi there !

Ohm's law formula

I = V/R

I = 3.5V/470Ω

I = 0.00744 A

Good luck !

Answer:

techtonic

Explanation:

Answer:

kinetic energy

Explanation:

Answer:

1609.3

Explanation:

If the communication lifetime of civilizations in our galaxy is 100 million years and our galaxy is 13 billion years old, The chance of us detecting another intelligent civilization now is 1 in 130.

The Milky Way is the galaxy that includes our Solar System, with the name describing the galaxy's appearance from Earth:

A hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the human eye.

The Milky Way is a large spiral galaxy. Earth is located in one of the spiral arms of the Milky Way (called the Orion Arm) which lies about two-thirds of the way out from the center of the Galaxy.

Our Milky Way galaxy is just one of the billions of galaxies in the universe.

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Answer: Depends on their adaptions such as they may be able to change their color of their skin to camouflage to hide from predators or they are able to survive in harsh weather where they live in.

Explanation:

Answer: An adaptation is a very particular skill which helps an animal do the things they do in every day life .  Adaptation basically helps an animal survive in the environment they have decided to live in .

Hoped I helped -

Sleepy~

Answer:

3 N

Explanation:

From the question given above, the following data were obtained:

Mass of block = 100 Kg

Net force = 3 N

From the question given above, we were told that the net force acting on the block is 3 N.

Thus, 3 N remains the net force acting on the block.

Answer:

temperature inside the balloon so it is warmer than the surrounding air

Explanation:

For the balloon to get an uplift , it should be lighter than air . That means the density of the gas inside should be less than the density of air outside . only then ,  weight of the balloon plus the weight of the air inside balloon  will become less than the weight of displaced air outside . This can be achieved by warming up the air inside. Its temperature must exceed that of outside air.

The option that best explain how the pilot can make the balloon rise is option D. The pilot can increase the temperature inside the balloon so it is warmer than the surrounding air

An object will float in air when the density of the object is lower than the density of the air.

Increase in temperature of a gas decreases the density of the gas.

For the pilot to make the balloon rise, he must find a way to make the balloon more lighter than air. To do this, he has to increase the temperature of the balloon.

In this question, the pilot can increase the temperature inside the balloon so it is warmer than the surrounding air in order for the balloon to quickly rise several feet higher above some trees in distance.

Therefore, option D best explain how the pilot can make the balloon rise.

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Answer:

c

Explanation:

bnbbbn nbnbnb bbbb bnbb

Answer:

\(\boxed {\boxed {\sf 96 \ m/s}}\)

Explanation:

We are asked to find the final velocity of the car given the acceleration and time. We can use the following kinematics equation to calculate the final velocity.

\(v_f=v_i+(a \times t)\)

The car starts from rest, so the initial velocity is 0 meters per second. It accelerates a rate of 40 meters per square second over a period of time of 2.4 seconds.

Substitute the values into the formula.

\(v_f= 0 \ m/s + ( 40 \ m/s^2 \times2.4 \ s)\)

Solve inside the parentheses.

\(v_f= 0 \ m/s + (96 \ m/s)\)

Add.

\(v_f= 96 \ m/s\)

The final velocity of the car is 96 meters per second.

All of the following are major body tissue types except Lymphatic tissue.

Tissue is the mass of the cell of body of human.

The lymphatic system is an extensive network of vessels, nodes, and ducts that pass through almost all bodily tissues. It allows the circulation of a fluid called lymph through the body in a similar way to blood.

The lymphatic system is a network of vessels, nodes, and ducts that collect and circulate excess fluid  in the body.

The lymphatic system is part of the immune system. It also maintains fluid balance and plays a role in absorbing fats and fat-soluble nutrients.

The lymphatic system drains excess fluid that accumulates in bodily tissue, filters out foreign bodies, and transports it back into the bloodstream.

Failures of the lymphatic system can cause swelling, venous dysfunction, and life threatening complications.

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The thickness of lead required to block a 20MeV electron beam to only 5% transmission is approximately 1.4mm.

An electron beam is a stream of electrons that can be directed and manipulated using magnetic and electric fields. An electron beam can be used to make the beams of charged particles, synchrotron light, or X-rays, which are widely used in research, medicine, and engineering.

The penetration of electrons through a substance is determined by the speed of the electrons, the density and composition of the substance, and the thickness of the substance.To calculate the thickness of the lead needed to block a 20MeV electron beam to only 5% transmission, we will use the exponential attenuation equation given below:

I = I₀e⁻μx

Where:

I₀ = initial intensity of electron beam

I = intensity of electron beam after passing through x thickness of lead

μ = mass attenuation coefficient of lead at 20Me

Vx = thickness of lead required to reduce the electron beam to 5% of its original intensity (95% absorption)

To calculate x, we can use the equation:

I/I₀ = 0.05 = e^(-μx)

Taking the natural logarithm of both sides of the equation gives:

-ln(0.05) = μx

Thus:

x = (-ln(0.05))/μ

The mass attenuation coefficient of lead at 20MeV is 0.206 cm²/g. We can convert this to m²/kg by dividing by the density of lead, which is 11.34 g/cm³. Therefore,

μ = 0.206/11.34 = 0.01816 m²/kg

Substituting this value for μ gives:

x = (-ln(0.05))/0.01816= 1.4 mm

Therefore, the thickness of lead needed to block a 20MeV electron beam to only 5% transmission is approximately 1.4mm.

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