how many km would you have to go above the surface of the earth to for your weight to decrease by half

The roof of a building is 0.20 km². During a rainstorm, 5.5 cm of rain was measured to be sitting on the roof. The volume of water that was measured to be sitting on the roof during the rainstorm will be measured as:

We know that 1 cm is equivalent to 10 mm.

Therefore, 5.5 cm is equal to 55 mm.

Area of the roof of the building

= 0.20 km² = 0.20 × (1000 m)²

= 0.20 × 10⁶ m²

The volume of water on the roof of the building

= (Area of the roof of the building) × (height of water on the roof of the building)

= (0.20 × 10⁶ m²) × (55 mm)

= (0.20 × 10⁶ m²) × (55/1000 m) = 11,000 m³

Therefore, the volume of water that was measured to be sitting on the roof during the rainstorm was 11,000 m³.

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Explanation:

To convert from scientific notation to decimal, move the decimal point 5 places to the left.

5.93×10⁻⁵ = 0.0000593

The efficiency of the engine is 60%.

The efficiency of a heat engine describes the amount of input energy converted into useful work.

It also entails the amount of useful work done by the engine. The greater the amount of useful work done by the engine, the greater the efficiency of the engine.

The efficiency of an engine ranges from 0 to 100%.

If there four stages in the energy conversion cycle, and 10% energy is wasted in each cycle, the total energy wasted in the four cycles is calculated as;

Total wasted energy = 4 x 10% = 40%

Efficiency of the engine = Useful energy = 100% - 40% = 60%

Thus, the efficiency of the engine is the useful work done by the engine.

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Electrical burns can occur in a variety of ways, including arc burns, low voltage burns, high voltage burns, mouth burns, flash burns, and flame burns.

Electric shock, a serious electrical mishap, or a fatal electrical event are all considered electrical incidents.

For the purposes of reporting and analysis, incident definition types let you attribute the appropriate type to safety events. Having only the two types of incidents—Accident and Near Miss—is one strategy.

An occurrence or scenario that has a number of serious repercussions and necessitates the implementation of special measures by one or more emergency responder agencies is referred to as a big incident.

Any electrical incident that results in or has the potential to result in: death or serious bodily harm to a person; significant property damage; or a serious risk to the public safety must be reported, according to the Electrical Safety (General) Regulations of 2019.

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The gravitational potential energy of the stone is +2.5 J.

Gravitational capability strength is electricity an item possesses because of its function in a gravitational area. The most common use of gravitational ability power is for an object near the floor of the Earth in which the gravitational acceleration may be assumed to be regular at about nine.eight m/s2.

Gravitational strength or gravitational potential energy is the capacity power a large item has when it comes to any other large item because of gravity. it's far the ability power associated with the gravitational area, that is released when the gadgets fall closer to each different.

(a) y = 1.3m: U = mgh = (0.20kg)(9.80m/s*)(1.3m) = +2.5T

(b) y =-5.0m : U = mgh = (0.20kg)(9.80m/s”)(-5.0m) = —9.83

(0) AU =U,--U; = (-9.83)-(2.5J) = -12.3 = -123

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If the energy input to an electric motor is 560J/s and 170J/s of energy is transferred to thermal energy when in use, the efficiency of the motor would be

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

As given in the problem If the energy input to an electric motor is 560J/s and 170J/s of energy is transferred to thermal energy when in use,

Useful energy = electrical energy - thermal energy lost

                        =560 J/s - 170 J/s

                        = 390 J/s

the efficiency of the motor = useful energy /electrical energy ×100

                                            = 390/560 ×100

                                            =69.64%

Thus, the efficiency of the motor would be 69.64%.

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Calibrating a thermometer is important to ensure that the temperature readings are accurate.

By using a set of standards with a range of known melting points, the thermometer can be calibrated against known temperatures to ensure it is providing accurate readings.

This ensures that when the thermometer is used in experiments or other applications, the measurements taken are reliable and can be trusted. Calibration also allows any potential errors in the thermometer readings to be identified and corrected.

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Answer:

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

Explanation:

Answer:

Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system that takes in nutrients, breaks them down, and creates energy-rich molecules for the cell.

Answer:

méthode if séparation muddy water

As per the given scenario, Ram will cross the river first.

Ram chooses the quickest route and crosses the river without turning. Ram and Hari can both swim in still water at the same speed, hence their respective speeds when crossing the river will be equivalent. Ram will be able to get to the opposing bank the fastest as a result.

Hari, on the other hand, is swimming upstream at an angle and is being dragged downstream by the water.

Hari's overall travel distance will increase due to the downstream current, however his effective speed will drop in comparison to the other bank. Hari will therefore take longer than Ram to get to the opposing bank.

Thus, Ram will cross the river first in this scenario.

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Answer:

b

Explanation:

because the metalloids are the thing in the middle

a)The aperture size of the radio telescope needs to be approximately 0.27 meters b)The aperture of a radio telescope needs to be much larger than that of an optical telescope because radio waves have much longer wavelengths compared to visible light. c)the resolving power of a telescope depends on the ratio of the wavelength of light.

a. To determine the aperture size of a radio telescope to achieve a resolution at 21 cm, we can use the Rayleigh criterion, which states that the minimum resolvable separation (δθ) is given by:

δθ = 1.22 * (λ / D)

Where λ is the wavelength of the radiation and D is the diameter of the telescope's aperture.

Given that the radio wavelength is 21 cm (or 0.21 m), and we want to achieve the same resolution as the optical telescope (1 second of arc), we can rearrange the formula to solve for D:

D = 1.22 * (λ / δθ)

D = 1.22 * (0.21 m / 1 second of arc)

Calculating the result:

D ≈ 0.27 m

Therefore, the aperture size of the radio telescope needs to be approximately 0.27 meters to achieve a resolution of 1 second of arc at a wavelength of 21 cm.

b. The Rayleigh criterion tells us that the resolution of an instrument is inversely proportional to the wavelength.

Since radio waves have longer wavelengths, the telescope's aperture needs to be larger to achieve the same resolution as an optical telescope. This is because a larger aperture collects more incoming waves and allows for finer spatial detail to be resolved.

c. The ability to resolve two objects using a telescope depends on the size of the aperture relative to the wavelength of the radiation. When it comes to resolving stars, the resolving power of a telescope depends on the ratio of the wavelength of light to the size of the telescope's aperture (λ/D).

Blue light has a shorter wavelength compared to red light. Since the resolving power is directly proportional to the wavelength, a shorter wavelength of blue light allows for better resolution.

Therefore, two predominantly blue stars can be resolved because their shorter wavelength allows for finer detail to be distinguished, while the same separation between two predominantly red stars cannot be resolved due to the longer wavelength.

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Answer:

Heat

Explanation:

All materials have go some sort of heat.

Answer:Since the friction  force is non-conservative as potential energy. All the work done by the friction forces results in a transfer of energy into thermal energy of the box  floor  system.

Explanation:

Answer:

A. So that you can see if the answer to a problem makes physical sense.

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.

An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).

This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.

Measurements refers to the process which typically involves the process of identifying and determining the dimensions of a physical object. The dimensions include important parameters such as width, height, length, area, volume, circumference etc.

In Science, making rough estimates of physical quantities is useful so that you can see if the answer to a problem makes physical sense.

For example, you could make a rough estimate of a storage tank and deductively determine whether or not it's in tandem with its physical size in reality.

Answer:

The mass of the squirrel is 0.51kg

A squirrel runs at a speed of 9.9 m/s with 25 J of kinetic energy.

What is the squirrel’s mass?

Answer: 0.51 kg

Answer:

A Newton's First Law of Motion

The device consumes 84 watts of power.

Power is calculated by multiplying the voltage by the current, or P=VI. In this case, the device operates on 12 volts and draws 7 amps, so the power consumption is 12 x 7 = 84 watts. This is the amount of power that the device is using at any given moment, and it is an important consideration when determining the electrical needs of a system or selecting an appropriate power supply.

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Explanation:

the pressure is given by P=hpg

where h is height,p is density, g is 10m/s²

thus P= 0.05m•13.6x10³•10

P=6.8x10³ Hgmm

Explanation:

a) What is the weight of the crate?

W = m*g = 60 kg *9.81 m/s^2 = 588.6 N

Sum of the forces in the vertical direction on the box (up is +) = F - W = 500 N - 588.6 N = -88.6 N

Since the forces do not add up to 0, then there is a net force on the crate which will cause the crate to accelerate.

b) F = m*a ==> a = F/m

a = -88.6 N / 60 kg = -1.48 m/s^2 (- means down since above we declared up as +)

c) Assume it starts from rest, vi = 0 m/s

Equation of motion in the vertical direction

h = h0 + v0*t + 1/2*a*t^2

h0 = 1.4 m

h = 0 m

v0 = 0 m/s

a = -1.48 m/s^2

0 = 1.4 m + 0 - 1/2* 1.48 m/s^2 * t^2

1.4 m = 1/2 * 1.48 m/s^2 * t^2

t = 1.38 s

d) vf = vi + a*t

vi = 0 m/s

vf = a*t = -1.48 m/s^2 * 1.38 s = -2.04 m/s

The coefficient of kinetic friction between the bag and the ground is found to be 0.0251. It represents the ratio of the frictional force to the normal force acting between them.

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If the trailer breaks away and pulls apart both air lines, it would result in a loss of air pressure in the trailer's braking system.

As a result, the emergency brakes on the trailer should activate automatically. This is because trailer brakes are typically designed to engage in such situations where there is a sudden loss of air pressure.

When the emergency brakes engage, it helps to bring the trailer to a stop and prevent it from freely rolling away. However, it's important to note that the braking effectiveness may vary depending on the specific design and condition of the trailer's braking system.

Additionally, the actions you should take in response to this situation would depend on various factors, such as the speed of the vehicle, the surrounding traffic conditions, and the availability of safe stopping options. In any case, it is crucial to prioritize safety and take appropriate measures to control the vehicle and ensure the safety of yourself and others on the road.

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Answer:

They store floodwater

Explanation:

Answer:

20 m

Explanation:

The ball travels 4 m up, then 16 m down.  It travels a total distance of 20 m.

The order of events when a neuron fires an action potential is as follows:

1. Depolarization: The neuron's membrane potential is changed from its resting potential to a more positive voltage.

2. Threshold: The membrane potential reaches a critical level, known as the threshold potential, which triggers the action potential.

3. Action potential: An all-or-none electrical impulse is generated and propagates along the axon.

4. Repolarization: The membrane potential returns to its resting potential.

The given quantities are to be tabulated in the following manner: Quantities Current i in a long wire of radius RE(r) for a long uniform cylinder of charge of radius RB(r) for a parallel-plate capacitor, with circular plates of radius R.

Current i in a long wire of radius Rμoi/2πrThe expression is obtained by applying Ampere's Law to a long wire. In this expression, i is the current in the wire, r is the distance from the wire, and μo is the permeability of free space.E(r) for a long uniform cylinder of charge of radius Rρr/εoThe expression is obtained by applying Gauss' Law to a cylindrical charge distribution.

In this expression, ρ is the charge density of the cylinder, r is the distance from the axis of the cylinder, and εo is the permittivity of free space.B(r) for a parallel-plate capacitor, with circular plates of radius R, in which E is changing at a constant rate2μoεoR2(dE/dt)/rThe expression is obtained by applying Faraday's Law to a changing electric field.

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A passenger weighing 500N is inside an elevator weighing 24500 N that rises 30 m every minute is 12500 W (12.5 kW).

What is Power?

Power is the amount of work that is done per unit of time. It can be associated with the speed of a change of energy within a system, or the time it takes to perform a job.

There are different types of power,

Mechanical power: is that work performed by an individual or a machine in a certain period of time.

Electric power: which is the result of the multiplication of the potential difference between the ends of a load and the current flowing there.

P= W/t

Where, P- Power,

W- Work

T- Time

The total weight of the passenger + elevator is

Fg = 500+24500

    = 25000

The total work done to rise the elevator + passenger is equal to the product between the total weight and the distance covered during the trip (d = 30 m):

W = Fgd

   = 25000×30

   =7,50,000 J.

The power needed for the trip is equal to the ratio between the work done (W) and the time taken (t):

P = W/t

Since the time taken is t = 1 min = 60 s, the power needed is

P = 750000 / 60

   = 12,500 W

P = 12.5 kW

Thus, Power was calculated as P = 12.5 kW.

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