Form hypothesis: How do you think objects will fall when there is no air?

The lightbulb has a 5% efficiency. Accordingly, only 5% of the energy input is transformed into usable light energy, with the remaining 95% being lost as heat or other kinds of energy.

Efficiency is referred to as the useful energy input to output ratio, represented as a percentage. Efficiency (η) can be calculated mathematically as:

η = (Useful output energy / Input energy) * 100%

In this case, the useful output energy is given as 10 J each second, and the input energy is 200 J each second. Plugging these values into the efficiency formula:

η = (10 J / 200 J) * 100%

Calculating the expression above:

η = (0.05) * 100%

η = 5%

Therefore, The lightbulb has a 5% efficiency. Accordingly, only 5% of the energy input is transformed into usable light energy, with the remaining 95% being lost as heat or other kinds of energy.

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Answer:

orce = rate of change of momentum which is m a if the mass is constant

10 Newtons = change of momentum/0.10 second

so change of momentum = 1 kg m/s

by the way the change in speed would be 1/5 = .2 m/s

Explanation:

If a 5-kg object experiences a 10-N force for a duration of 0. 10-second then the impulse exerted by the force on the object would be 1 Ns, and the change in the momentum would be  1 Ns.

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.

As given in the problem If a 5-kg object experiences a 10-N force for a duration of 0. 10-second then we have to find out what the impulse exerted by the force on the object.

P = force × time

  = 10 × 0.1

  = 1  Ns

Thus, If a 5-kg object experiences a 10-N force for a duration of 0. 10-second then the impulse exerted by the force on the object would be 1 Ns, and the change in the momentum would be  1 Ns.

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Answer:

7 seconds

Explanation:

please see paper!

vf² = vo²+2ad

vf=vo+at

vf²=3.5²+2.2.75

vf²=312.25

vf=17.67 m/s

vf=vo+at

17.67 = 3.5 +2t

t=7.085 s

Given data:

* The mass of the shuttle is,

* The acceleration of the shuttle is,

Solution:

According to newton's second law, the lifting force of the shuttle is,

Hence, the lifting force of the shuttle is 6000 kN.

Answer:

a chemical reaction where electrons mix.

Explanation:

A nuclear reaction is when atomic nuclei combine, forming a new chemical element

A chemical reaction occurs when electrons from the last layer of atoms mix, forming molecules that have the same chemical elements as the reactants.

According to these definitions

           C + 2 S → CS2

in a chemical reaction where electrons mix.

Answer:

This is a chemical reaction, because only the electrons were rearranged.

Explanation:

4.2 km / 7 min

IS already speed.

as

speed = distance / time

but it probably means a standardized speed like

km/h = km / 1 hour

so, we have the fraction (every ratio is audio a fraction)

4.2 km / 7 min = 0.6 km / 1 min

aha, and now we only need to multiply this by 60/60 to get the speed as per 1 hour (remember, 1 hour = 60 minutes) :

0.6/1 × 60/60 = 0.6×60 / (1×60) = 36/60 = 36 km/h

Answer:

36

Explanation:

v=d/t

where

d=4.2 km

t=7 minutes/60 minutes (using conversion)
t=.1166666667 H
so,
v=4.2 km/.117 H
v=36 km/H

When resistors are connected in series, their equivalent resistance is equal to the sum of the individual resistances.

In a series circuit, resistors are connected one after the other, so the same current flows through each resistor. The total resistance experienced by the current is the sum of the resistances of all the resistors in the series. This can be calculated using the formula: Rt = R1 + R2 + R3 + ... + Rn, where Rt is the total resistance and R1, R2, R3, etc., are the individual resistances.

In conclusion, when resistors are connected in series, the equivalent resistance is determined by adding up the values of each resistor. This concept is important in understanding the behavior of series circuits and calculating the overall resistance encountered by the current flowing through the circuit.

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Given that the speed of red light is slower in air and water than in a vacuum, but its frequency does not change ;

The wavelength changes (decreases) as the light enters water.

When light such as red light travels from air into water, the speed of the light will change, but the frequency of the light traveling through vacuum, water and air will remain constant. But as light travels from air into water, the wavelength will decrease.

Hence, we can conclude that the wavelength changes (decreases) as the light enters water.

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The four things that the astronomer has to do to read messages he receives from space are as follows: Data Collection, Data Processing, Data Analysis, Interpretation and Communication.

Data Collection: The astronomer uses specialized instruments, such as radio telescopes, optical telescopes, or spectrographs, to collect the incoming signals or light from space.

These instruments capture the electromagnetic radiation emitted by celestial objects or any other signals of interest.

Data Processing: Once the data is collected, it needs to be processed and converted into a usable format. This involves removing noise, calibrating the data, and applying various correction techniques.

The astronomer may use computer software or algorithms to enhance the quality and interpret the data effectively.

Data Analysis: After the initial processing, the astronomer analyzes the data to extract meaningful information. This involves studying patterns, identifying specific features, and comparing the data with known models or theoretical predictions.

The analysis may include techniques like statistical analysis, image processing, spectral analysis, or data visualization.

Interpretation and Communication: Based on the analysis, the astronomer interprets the findings and draws conclusions about the messages or phenomena observed.

This may involve identifying the presence of specific signals, understanding their characteristics, determining their origin or nature, and assessing their significance in the context of astrophysics or extraterrestrial communication.

The astronomer then communicates the results through research papers, scientific conferences, or other means to share the findings with the scientific community and the public.

It's important to note that the exact steps and techniques involved may vary depending on the nature of the received messages and the specific instruments and technologies used by the astronomer.

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The speed in m/s equal to 78.0 mi/h AND  the area in ft2 of a rectangle with sides 18.6 m and 3.82 m AND the height in cm of a person who is 5 ft 7 in tall.

a) To find the speed in m/s equal to 78.0 mi/h, we use the conversion factor,

1 mi = 1609.344 meters and 1 h = 3600 s.78.0 mi/h = (78.0 mi/h) x (1609.344 m/mi) x (1 h/3600 s)= 35.0 m/s

Therefore, the speed in m/s equal to 78.0 mi/h is 35.0 m/s.

b) The area in ft2 of a rectangle with sides 18.6 m and 3.82 m is calculated as follows:

First, we convert the sides from meters to feet using the conversion factor

1 m = 3.281 ft.18.6 m = 18.6 m x (3.281 ft/m) = 61.024 ft3.82 m = 3.82 m x (3.281 ft/m) = 12.532 ft

The area is given by the formula A = L x W, where L is the length and W is the width.

A = (61.024 ft) x (12.532 ft)A = 765.69 ft2Therefore, the area in ft2 of a rectangle with sides 18.6 m and 3.82 m is 765.69 ft2.

c) The height in cm of a person who is 5 ft 7 in tall can be found by converting the height to inches and then to centimetres.

1 ft = 12 in5 ft = 5 ft x 12 in/ft = 60 in5 ft 7 in

= 60 in + 7 in = 67 in1 in = 2.54 cm67 in

= 67 in x (2.54 cm/in) = 170.18 cm

Therefore, the height in cm of a person who is 5 ft 7 in tall is 170.18 cm.

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The total resistance in a series circuit is equal to the sum of the individual resistances. Therefore, the total resistance in this circuit would be 1 + 2 + 10 = 13 Ohms. So the answer is A) 13 Ohms.

the total resistance in a series circuit consisting of three resistances: 1 Ohm, 2 Ohms, and 10 Ohms.

To find the total resistance in a series circuit, you simply add the individual resistances together.
Add the resistances
1 Ohm + 2 Ohms + 10 Ohms = 13 Ohms

So, the total resistance in this series circuit is 13 Ohms.

The total resistance in a series circuit is equal to the sum of the individual resistances. Therefore, the total resistance in this circuit would be  13 Ohms.

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In the electromagnetic spectrum the greater the frequency the smaller the wavelength, then is the frequency is the lowest in the light spectrum the light will have the longest wavelength. Therefore, the answer is b.

Answer:

The energy will be increased by a factor 16

Explanation:

Mathematically, we have it that the energy carried by the sound wave is directly proportional to the square of the amplitude

So we have it that;

E = k * A^2

where E is the wave energy

K is the constant value

A is the amplitude value

So;

If E1 = k * (A1)^2

E2 = k * (A2)^2

But A2 = 4A1

E2 = k * (4A1)^2

E2 = k * 16(A1)^2

Divide E2 by E1

E2/E1 = k/k * 16(A1)^2/(A1)^2

E2/E1 = 16

E2 = 16 * E1

so simply, the energy will be increased by a factor of 16

A heat engine operates by converting thermal energy into mechanical energy. The efficiency of a heat engine is defined as the ratio of the useful work output to the heat absorbed from the hot reservoir.

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A discordant igneous intrusion cuts across bedding planes. Here is the detailed explanation of the given question:Explanation:The Discordant igneous intrusion is the formation of an igneous rock mass when magma is injected into a host rock and cools there.

This form of igneous intrusion does not conform to the stratification or layering of the existing rock mass because it cuts across it.Therefore, a discordant igneous intrusion cuts across bedding planes.Option (a) is correct. It is the only option that describes the features of discordant igneous intrusion. Hence, the correct answer is option (a).

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Followers of the humanistic perspective are said to have a(n) optimistic view of human nature. The best answer is c.

The humanistic perspective emphasizes the positive aspects of human nature, such as personal growth, self-awareness, and self-actualization. According to this perspective, people have the potential to lead fulfilling lives and to realize their full potential. Humanistic psychologists believe that individuals have free will and the capacity to make conscious decisions about their lives.

This perspective emphasizes the importance of individual experience and personal choice in shaping behavior and personality. In contrast to the pessimistic views of other schools of psychology, humanistic psychology emphasizes the potential for positive growth and change in individuals. Hence, c is the correct choice.

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A 9.0-V battery is connected to a lightbulb with a resistor of 100 ohms. The power delivered to a light bulb is 0.81 watts.

In physics, power is the rate at which work is done or energy is transferred. It is a scalar quantity that measures the amount of energy transferred per unit time. The SI unit of power is the watt (W), which is defined as one joule of work per second.

To calculate the power delivered to a light bulb, we can use the formula:

Power = (Voltage)² / Resistance

Here, Voltage = 9.0 V and Resistance = 100 ohms

Substituting these values in the formula, we get:

Power = (9.0 V)² / 100 ohms

Power = 81.0 / 100

Power = 0.81 W

Therefore, the power delivered to the light bulb is 0.81 watts.

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Answer:

the keys will make it back to John.

Explanation:

In order to find out if the keys will reach John or not, we can use the formula of projectile motion to find the maximum height reached by the keys:

H = V²Sin²θ/2g

where,

V = Launch Speed = 18 m/s

θ = Launch Angle = 40°

g = 9.8 m/s²

Therefore,

H = (18 m/s)²[Sin 40°]²/(2)(9.8 m/s²)

H = 6.83 m

Hence, the maximum height that can be reached by the projectile or the keys is greater than the height of John's Balcony(5.33 m).

Therefore, the keys will make it back to John.

Yes, Key will surely reach back to John.

Given that;

Velocity v = 18 m/s

θ Angle = 40°

g = 9.8 m/s²

Computation:

By using maximum height formula

H = [v²][sin²θ]/2g

H = (18)²[Sin 40°]²/[(2)(9.8)]  

H = 6.83 m

6.83 meter is more then 5.33 meter,

So,

Key will surely reach back to John.

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Static electricity represents charges without movement, while electric current represents charges in motion (electric flow).

The fuse is a component of electrical installations that is interrupted or melts when the current is excessive. Fuses are composed of a sheet or filament made of an alloy or metal that is characterized by a low melting point. This element is located at a strategic point in the electrical installation so that it melts if the intensity of the current exceeds a certain value. Thus, the fuse interrupts the current and safeguards the integrity of the conductors, minimizing the risk of fire or breakdown.

The statement that best fits the given description of Venus is: "Venus' rotation on its axis is retrograde, unlike most other solar system objects."

This means that Venus rotates in the opposite direction to the direction in which it orbits the sun. The statement "is the fastest of the terrestrial planets" is incorrect, as Venus has a slower rotation period than Mercury, which has the fastest rotation.

The statement "shows it is tidally locked in its orbit around the sun" is also incorrect, as Venus is not tidally locked to the Sun, although its rotation is relatively slow compared to its orbital period. The statement "is highly tilted to its orbital plane, causing large seasonal changes" is incorrect, as Venus has a very small axial tilt, meaning it experiences very little seasonal variation.

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The biggest advantage of using the trigonometric parallax method at a telescope on Pluto would be the ability to accurately measure the distances to nearby stars.

The trigonometric parallax method involves measuring the apparent shift in position of a star against the background of more distant stars as the observer's position changes due to the Earth's motion around the Sun.

By measuring this apparent shift in position, astronomers can determine the angle between the direction of the star and the direction of the Sun, known as the parallax angle. Using basic trigonometry, the distance to the star can then be calculated.

The trigonometric parallax method is most effective for measuring distances to stars that are relatively close to the Sun, as the parallax angle decreases rapidly with distance.

Therefore, using this method from a telescope on Pluto, which is over 5 billion kilometers away from the Sun, would allow for extremely accurate measurements of the distances to nearby stars that are otherwise difficult to measure accurately.

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The angle of incline of the hill above the horizontal is 8.81°.

Since the hill has a 15.5% grade is one that rises 15.5 m vertically for every 100.0 m of distance in the horizontal direction.

The tangent of the angle of the incline of the hill, Ф is

tanФ = vertical rise/horizontal distance = grade of hill

Now, the vertical rise = 15.5 m and the horizontal distance = 100.0 m

So, substituting the values of the variables into the equation, we have

tanФ = vertical rise/horizontal run

tanФ = 15.5 m/100.0 m

tanФ = 0.155

Taking inverse tan of both sides, we have

Ф = tan⁻¹(0.155)

Ф = 8.81°

So, the angle of incline of the hill above the horizontal is 8.81°.

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Answer:

cannibalism

Explanation:

because she is eating her body!

The potential energy at the top of the falls is converted into kinetic energy as the water falls. Equating the initial potential energy to the final kinetic energy,the height of the Canadian Falls is approximately 49.7 meters.

To determine the required height of the Canadian Falls, we can use the principle of conservation of energy. The initial kinetic energy of the falling water is zero (assuming initial speed is zero), and at the bottom of the falls, the entire gravitational potential energy is converted into kinetic energy. Using the equation for gravitational potential energy, PE = mgh, where m is the mass of the water, g is the acceleration due to gravity, and h is the height of the falls, we can solve for h. Rearranging the equation to solve for h, we find that the height of the Canadian Falls must be approximately 49.7 meters.

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The refracting telescope uses large lenses. The larger lenses increase the weight of the telescope. The weight of the refracting telescopes makes it difficult for the observer to keep them aligned.

Thus the correct answer is option b, refracting telescopes.

Answer:

Is Reflecting telescope

Explanation:

I took the test

Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :

Step 1: Calculate the velocity using the equation:

\(v = u + at\)

where:

- \(v\) is the final velocity

- \(u\) is the initial velocity (0 m/s, as the car starts from rest)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)

Step 2: Calculate the distance traveled using the equation:

\(s = ut + \frac{1}{2}at^2\)

where:

- \(s\) is the distance traveled

- \(u\) is the initial velocity (0 m/s)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)

Now, let's simplify these equations:

\(v = 3 \times 50\)

\(s = \frac{1}{2} \times 3 \times 50^2\)

Calculating the results:

\(v = 150\) m/s

\(s = 3750\) meters

Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.

Given:

The mass of the pendulum, m=1.29 kg

The length of the simple pendulum, L=0.830 m

The period of the pendulum, T=1.809 s

To find:

(b) The spring constant of the spring so that the period of the oscillation of the spring will be T.

Explanation:

The period of oscillation of a spring-mass system is given by the equation,

On rearranging the above equation,

On substituting the known values,

Final answer:

The spring constant of spring is 15.56 N/m

Answer:

ummmmmwm whattt

Explanation:

wuhsnnsnsnsnms

Answer:

medicines

band-aids

aqua liquid

paracetamol

Explanation:

Extra items:

alcohol

cottons

bitadine

cotton buds

mask

Answer:

2. Ahead of the package

Explanation:

The plane is going straight without stopping while the package is going straight down.