A ball is dropped from a height h and falls the last half of its distance in 4 seconds. How long does the ball fall? From what height is the ball originally dropped?

To calculate the amount of boiling water that must be added to the beaker, you need to use the heat capacity equation. This equation is given by:

Q = mcΔT

An equation is a mathematical statement that expresses the equality of two expressions. It is typically used to describe the relationship between two variables or an expression and an unknown value. An equation is usually written as a statement of equality between two expressions separated by an equal sign.

Where Q is the amount of heat, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

Since you are starting with 750 g of water at 10°C and you want to end up with a final temperature of 75°C, you can rearrange the equation to solve for m, the mass of boiling water:

m = Q/(cΔT) = (750g × 4.19 × 103 J/(kg•K) × 65°C)/(4.19 × 103 J/(kg•K)) = 1950 g

Therefore, you need to add 1950 g of boiling water at 100°C to the beaker in order to reach the desired final temperature of 75°C.

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Interior dome light provide Glare and Contrast while driving at night and it also offers Adaptation to Darkness along with preventing Distraction.To ensure optimal visibility while driving at night, it is generally recommended to keep the interior dome light off or dimmed.

Glare and Contrast: When driving at night, it is important to have proper visibility to see the road, objects, and potential hazards.

Having the interior dome light on can create glare on the windshield or windows, which can reduce overall visibility by reducing contrast. Glare from the interior light can make it harder to see objects outside the vehicle, particularly in darker areas.

Adaptation to Darkness: Human eyes undergo a process called dark adaptation in low-light conditions, which allows them to adjust and see more clearly in the dark. The interior dome light, even if it is dim, can impede the dark adaptation process by providing a constant source of light, preventing the eyes from fully adjusting to the darkness outside the vehicle.

Distraction: The interior dome light can be distracting while driving at night, as it creates additional light sources inside the vehicle. This can divert attention from the road and decrease overall focus and reaction time.

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The magnitude of the magnetic field generated by an electromagnet is directly proportional to the magnitude of the current in the coil.

Magnetic field lines are the lines in a magnetic field the tangent of which at any point will give the field direction at that point and its density gives the magnitude of the field. The magnitude of an electromagnet can easily be changed by changing the amount of electric current that flows through it. Increase in the flow of electric current increases the magnitude of the magnetic field.

magnitude of the magnetic field is 6.00 \times 10^{-6}T.

To increase the magnitude of magnetic fields, these have to be done:

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Answer:

D : Add more soil

Explanation:

Answer:

current?

Explanation:

To calculate the Taguchi quality cost, we need to multiply the length of each piece by the Taguchi parameter T, and then sum up the costs.

Given:

Length of the first metal rod = 49.19 cm

Length of the second metal rod = 49.93 cm

a) Taguchi parameter T:

Since we don't have the specific value of T, we cannot calculate it.

b) Taguchi Quality Cost of the second metal rod:

Taguchi Quality Cost = Length of the second metal rod * Taguchi parameter T

c) Taguchi Quality Cost of the first metal rod:

Taguchi Quality Cost = Length of the first metal rod * Taguchi parameter T

d) Total Taguchi Quality Cost of the two units:

Total Taguchi Quality Cost = Taguchi Quality Cost of the first metal rod + Taguchi Quality Cost of the second metal rod

Since we don't have the Taguchi parameter T, we cannot calculate the specific values for parts (b), (c), and (d).

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Answer:

a.ionic bond is kinds of bonds make up a formula unit of sodium chloride.

Answer:

A

Explanation:

This lamp's estimated current consumption is 8 amperes.

Electric current is the rate of charge (electron) passing in a conductor. The SI unit for electric current is the ampere. As current does not obey vector addition, it is a scalar quantity.

Given information:

amount of charge flowing through the lamp, Q = 28800 C;

The charge flow time was t = 1 hour = 3600 seconds.

Hence, the current passing through the bulb as a result.

I = Q/t

= 28800/3600 ampere,

= 8 ampere

Therefore, this lamp consumes 8 amperes of current.

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1) Gravity is a force of attraction acting between bodies or objects that have masses. It pulls the bodies towards each other.

Answer:

A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays.

Explanation:

its right dawg  

The magnitude of the linear acceleration of the falling bucket is 9.8 m/s^2. The magnitude of the linear acceleration of the falling bucket is equal to the acceleration due to gravity, which is 9.8 m/s^2.

A bucket with a mass of a kg is attached to a cylindrical, massive pulley with a radius of b m. The bucket starts from rest and falls for c s into a well. The tension in the rope is d N. To find the magnitude of the linear acceleration of the falling bucket, we can use the following equation:

F_net = ma

Where F_net is the net force acting on the bucket, m is the mass of the bucket, and a is the acceleration of the bucket.

We can find the net force acting on the bucket using the tension in the rope: F_net = T - mg, where T is the tension in the rope, and mg is the weight of the bucket. Since the bucket is falling, we know that a = -g (where g is the acceleration due to gravity, which is a constant -9.8 m/s^2). So we can set up the following equation: T - mg = maT - mg = m(-g)T = mg - mgT = m(-g)T = -mg

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The force needed to keep the space shuttle moving at constant speed is 0.

The given parameters;

The mass of the space shuttle is calculated as follows;

\(W = mg\\\\m = \frac{W}{g} \\\\m = \frac{750,000}{9.8} \\\\m = 76,530.61 \ kg\)

The force needed to keep the space shuttle moving at constant speed is calculated as follows;

\(F = ma\)

\(F = 76,530.61 \times a\)

where;

a is the acceleration of the space shuttle

At a constant speed, acceleration is zero.

F = 76,530.61 x 0

F = 0

Thus, the force needed to keep the space shuttle moving at constant speed is 0.

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When a circuit reaches a steady state, the voltage source has done work to charge the capacitor to its final voltage. The amount of work done can be calculated by the equation:

W = 1/2 * C * (V_final)^2

where W is the work done by the voltage source, C is the capacitance of the capacitor, and V_final is the final voltage across the capacitor.

In a steady state, the voltage across the capacitor is equal to the voltage of the voltage source, E, and the current through the circuit is zero. Therefore, the final voltage across the capacitor is:

V_final = E

Substituting this into the equation for work done, we get:

W = 1/2 * C * (E)^2

This equation shows that the amount of work done by the voltage source is proportional to the capacitance of the capacitor and the square of the voltage source. It does not depend on the resistance of the circuit. In summary, the work done by the voltage source when a circuit reaches a steady state can be calculated using the equation W = 1/2 * C * (E)^2, where C is the capacitance of the capacitor and E is the voltage of the voltage source.

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Displacement is the movement of unfavorable emotions from one thing or person to another.

As a kind of self-preservation, displacement is the act of shifting one's unfavorable emotions from one thing or person to another.

According to the notion, releasing stress or worry on a non-threatening target helps a person deal with negative emotions like fear or rage.

For instance, if a person feels angry because their boss yells at them, they might project those feelings onto someone or something else, such a member of their family or a piece of furniture.

For fear of losing their work, the person could feel unable to face their manager. As a result, they might vent their rage on a less dangerous person like their partner or housemate.

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Answer:

Explanation:

Answer:

James Chadwick

Explanation:

James Chadwick discovered that the nucleus of each atom contains neutrons in 1932. Shortly after this, Eugene Wigner suggested that the electromagnetic force is not involved in holding the nucleus together and that there are two different nuclear forces. We now refer to these as the strong and weak nuclear forces.

Answer:

James Chadwick

Explanation:

i just searched it up lol

No, the driver of the northward-moving vehicle was not within the speed limit when the collision occurred.

To determine whether the driver of the northward-moving vehicle was within the speed limit, we need to analyze the collision and the resulting skid marks.

Given that the skid marks left by the collided vehicles are parallel and at an angle of 55.0 degrees north of east, it indicates that the vehicles were not moving directly along the east or north direction. Instead, they were moving at an angle.

If the northward-moving vehicle was within the speed limit of 35 mi/h, its speed would not have been sufficient to result in skid marks at an angle of 55.0 degrees. The collision and the resulting skid marks indicate a significant impact and angular momentum, which would require a higher speed than the speed limit allowed.

Therefore, based on the skid marks and the collision angle, the driver of the northward-moving vehicle was likely exceeding the speed limit when the collision occurred, and his claim of being within the speed limit is not valid.

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Answer to the first question-

Ans- The net force of the runner will be 280 N

Data obtained from the question-

The net force of the runner could be obtained by -

Net force = Exerting force - resistance force

Net force = 305 - 35

Net force = 280 N

So we can conclude that the runner's net force is 280 N

Answer to the second question-

Ans- The book will stay at rest

Explanation-

As we can see that the pushing force applied to the book is 3 N and the frictional force applied by the table is 7 N, so due to the overpowering frictional force in the opposite direction of the pushing force, the book will remain on its place until and unless a pushing force more significant than 7 N is applied on the book, in that case, the book will start moving in the right direction or in the direction of the pushing force.

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At 0.0804 km altitude the 1% of the mass of the atmosphere lies above and 99% of the mass lies below. Assumptions made are the global mean surface pressure of 1000 hPa is a representative value and the scale height is assumed to be constant throughout the entire atmosphere.

First, we need to calculate the pressure at the desired percentiles (1% and 99%) relative to the surface pressure.

For 1% of the mass lying above, we consider the pressure to be 1% of the surface pressure:

1% of 1000 hPa = 0.01 × 1000 hPa

= 10 hPa.

For 99% of the mass lying below, we consider the pressure to be 99% of the surface pressure:

99% of 1000 hPa = 0.99 × 1000 hPa

= 990 hPa.

Next, we use the exponential relationship between pressure and altitude:

P = P0 × exp(-z/H),

where P is the pressure at a given altitude, P0 is the surface pressure, z is the altitude, and H is the scale height.

To find the altitude z at which the pressure is equal to 10 hPa (1% of the surface pressure), we rearrange the equation:

10 hPa = 1000 hPa × exp(-z/H).

Taking the natural logarithm (ln) of both sides, we have:

ln(10 hPa / 1000 hPa) = -z / H.

ln(0.01) = -z / 8 km.

z = -8 km × ln(0.01).

Evaluating the expression:

z = -8 km × (-4.605)

= 36.84 km.

Therefore, 1% of the mass of the atmosphere lies above an altitude of approximately 36.84 km.

Similarly, to find the altitude z at which the pressure is equal to 990 hPa (99% of the surface pressure), we follow the same procedure:

990 hPa = 1000 hPa × exp(-z/H).

ln(990 hPa / 1000 hPa) = -z / H.

ln(0.99) = -z / 8 km.

z = -8 km × ln(0.99).

Evaluating the expression:

z = -8 km × (-0.01005)

= 0.0804 km.

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Answer:

A

Explanation:

i think a is the answer because if you take an example of group 1 and 2 metals on the periodic table you will notice that they are highly reactive but they have a few electrons in their outer most shells.

I hope this helps

The absorption of energy occurs in endothermic reactions. The correct option is D.

The type of chemical reaction that results in the absorption of energy is endothermic. In an endothermic reaction, energy is absorbed from the surroundings, resulting in an increase in the internal energy of the system.

This means that the products of the reaction have more energy than the reactants, and the reaction requires an input of energy to proceed.

Examples of endothermic reactions include the reaction of baking soda and vinegar, the melting of ice, and the reaction of ammonium nitrate and water.

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Answer:

satellite B

Explanation:

A .F= G (mM)/r²

B .F= G (2mM)/r² = 2G (Mm)r²

C .F= G (3mM)/(2r)² = ¾G (mM)/r²

D .F= G (4mM)/(2r)² = G (mM)/r²

Answer:

15km/hr

Explanation:

The average speed for the entire trip is the sum of the total distance traveled divided by the total time of the trip.

Total time  = 4hr

distance for the first 3hrs  = 50km

distance for the last 1hr  = 10km

  Total distance  = 50km + 10km  = 60km

Now;

  Average speed  = \(\frac{total distance }{time taken}\)  

 Insert the parameters and solve;

 Average speed  = \(\frac{60km}{4hr}\)   = 15km/hr

Answer:

To find the volume of a rectangular object, measure the length, width and height. Multiply the length times the width and multiply the result by the height. The result is the volume. Give the result in cubic units, such as cubic centimeters.

Explanation:

Answer:

Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. The amount of kinetic energy depends on mass and speed.

Explanation:

The wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.

Wavelength is defined as the space between waves' crests, particularly between electromagnetic or sound wave points. A recurring event's frequency is measured by how many times it occurs in a unit of time. To underline the difference from spatial frequency, it is also occasionally referred to as temporal frequency.

There is an inverse relationship between the frequency and the wavelength of the waves as the wavelength increases the frequency decreases and if the wavelength decreases the frequency increases.

Given that a wave has 5 complete waves occupying a length of 20m. The wavelength of the wave will be calculated as below:-

λ = Distance / frequency

λ = 20 / 5

λ = 4 meters

Therefore, the wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.

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Answer:

Its also know as atomic mass its the mass of isotopes.

Explanation:

relative atomic masses of sources in the local environment of the Earth's crust and atmosphere as determined by the atomic weight.

Answer:

440kgm/s

Explanation:

Momentum= mass × velocity

= 110× 4

= 440kgm/s

Given:

Thermal energy is denoted by W

Chemical energy is denoted by X

Electrical energy is denoted by Y

Kinetic energy is denoted by Z

To find the order of energy while converting bagasse to electricity.

Explanation:

The bagasse has chemical energy stored in it.

The bagasse is burned, so chemical energy gets converted into thermal energy.

The thermal energy gets converted into kinetic energy.

The kinetic results in the motion of electrons.

Thus, producing electrical energy.

Hence, the conversion order is XWZY

Answer:

Mass of substance m = 0.050Kg

Initial Temperature T₁ = 20°C

Final Temperature T₂ = 100°C

we have to calculate the heat absórbed by the lead .

Since spècific heat of lead is not gíven so we will take spècific heat of lead 128 J/kg°C

\( \diamond \bf \: Q\: = m \times c( \Delta \: t) \)Put the given value

\(\sf \longrightarrow \: Q = 0.050 \times 128 \times (100 - 20) \\ \\ \\ \sf \longrightarrow \: Q = 0.050 \times 128 \times (80) \\ \\ \\ \sf \longrightarrow \: Q = 6.4 \times 80 \\ \\ \\ \sf \longrightarrow \: Q = 512 \: joules\)

Therefore,