what two quantities did edwin hubble plot against each other to discover the expansion of the universe?

Answer:

33.33%

Explanation:

take efficiency =power output/power input multiply by 100%

Answer:

Batteries are systems that store chemical energy and then release it as electrical energy when they are connected to a circuit. Batteries can be made from many materials, but they all share three main components: a metal anode, a metal cathode and an electrolyte between them. The electrolyte is an ionic solution that allows charge to flow through the system. When a load, such as a light bulb, is connected, an oxidation-reduction reaction occurs that releases electrons from the anode while the cathode gains electrons

Explanation:

If a baseball has a negative velocity and a negative acceleration, its speed is decreasing.

Velocity is a vector quantity that includes both magnitude (speed) and direction. In this case, the negative velocity indicates that the baseball is moving in the opposite direction of a chosen positive reference direction. Acceleration, on the other hand, represents the rate of change of velocity and also includes both magnitude and direction.

When the velocity and acceleration have the same sign (both negative in this case), it means that the baseball is slowing down. This is because the acceleration is acting in the opposite direction to the velocity, which results in a decrease in speed. Therefore, the speed of the baseball is decreasing.

Saturn is a planet in solar system. It's ring is made out of small covered ice particle. It has over 30 moons.

Answer:

(9.4 times / 8.5 minutes) x (1 minute / 60 seconds)

= (9.4) / (8.5 x 60) times/second

= 0.013 Hz .

Maximum error in the result of the sum of measurement is equal to the sum absolute error of the individual observed measurements

(a) The maximum error in D is 0.09

(b) The standard error in D is approximately 0.034

The procedure for arriving at the above values is as follows;

The given measurements and the sited errors are;

A = 15.21 + 0.01

B = 10.82 + 0.05

C = 11.00 + 0.03

D = A + B + C

(a) Required parameter;

To calculate the maximum error in D

The equation for the propagation of error in addition is presented as follows;

Given that we have;

x = a + b

Therefore;

x + ±Δx = (a ± Δa) + (b ± Δb) = a + b ± (Δa + Δb)

∴ Δx = Δa + Δb

From the above formula, we have;

Where;

D = A + B + C

The maximum error in D = The sum of the maximum error in A, B, C

∴ The maximum error in D = 0.01 + 0.05 + 0.03 = 0.09

(b) Required parameter:

To find the standard error in D

The standard error is the sampling distribution's standard deviation, SD

Variance = SD²

The combined variance, SD² = The sum of the squares of individual standard deviations

Given that the standard errors represents the standard deviation, we get;

The combined variance, SD² = 0.01² + 0.05² + 0.03²

The combined variance, SD = √(0.01² + 0.05² + 0.03²) = 0.059

\(Standard \ error = \dfrac{SD}{\sqrt{n} }\)

Where n = 3, for the three measurement, we get;

\(Standard \ error = \dfrac{\sqrt{0.01^2 + 0.05^2 + 0.03^2} }{\sqrt{3} } \approx 0.034\)

The standard error in D is approximately 0.034

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It is 1.93 metres away from the post.

for vertical motion

\(S= u t + \frac{1}{2} g t^{2}\)

S = 0 +  \(\frac{1}{2} g t^{2}\)

1.7 = \(\frac{1}{2} 9.8 t^{2}\)

t = 0.589 sec

using law of  conservation of momentum, on the horizontal motion

\(m_{bullet} \ v_{bullet i} = m_{bullet} \ v_{bullet f} + m_{tin} \ v_{tin}\)

\(0.0020 = 0.0020 \ 3 \ 720 + 0.11 \ v_{tin}\)

\(v_{tin}\) = 3.273 m/s

S = \(v_{tin} \ t\)

   = 3.273 m/s * 0.589 s

   = 1.93 m

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According to the metric system, 1 metric ton (also known as a tonne) = 1,000,000 grams.  In the United States and some other countries, a ton is often used to refer to a unit of weight.

The metric system is a system of measurement used in most of the world that is based on the International System of Units (SI). The SI unit for mass is the kilogram (kg), which is defined as the mass of a specific cylinder of platinum-iridium alloy kept at the International Bureau of Weights and Measures in France.

The metric ton, also known as the tonne, is a unit of bin the metric system that is equal to 1,000 kilograms. This unit is commonly used to measure large masses of objects such as vehicles, cargo, and building materials.

Since 1 kilogram is equal to 1,000 grams, 1 metric ton is equal to 1,000 x 1,000 = 1,000,000 grams. This means that if you have a mass of 1,000,000 grams, you have a mass of 1 metric ton. Similarly, if you have a mass of 2,000,000 grams, you have a mass of 2 metric tons, and so on.

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The strap's tension needs to be changed to 4.11 N in order to deliver the required upward force, since there are no other forces acting in the upward direction.

To generate the required upward force, the tension on the strap must be adjusted, which equals T.

R²  = T²  + T²  - 2T² Cosθ

where;

The resulting force, R, is

5² = 2T²  - 2T² cos (75), where is the angle of inclination of the tension

25 = 1.482T²

T² = 25/1.482

T² = 16.87

T = √16.87

T = 4.11 N

In order to deliver the required upward force, the strap's tension must be set to 4.11 N.

This is due to Newton's third law, which states that for every action, there is an equal and opposite reaction. In this case, the force that the strap exerts on the chin (the action) must be equal and opposite to the force that the chin exerts on the strap (the reaction).

Therefore, to provide the necessary upward force of 5.00 N, the tension in the strap must be 4.11 N.

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Given, Speed of the sound, v=675 m/s

The wavelength of the wave, λ=15 m

Relation between speed, wavelength, and frequency of a wave is given by

Where f is the frequency of the sound.

On substituting the known values,

Which gives us,

Therefore the frequency of the sound in the given medium is 45 Hz.

According to the three trial durations, the average times to for car to traverse 0.25 metres and 0.50 kilometers are as tries to follow:

0.25 miles divided by 2.23 seconds

0.50 metres divided by three seconds

Average total distance in 0.25 metres:

Challenges 1 though 3 are compounded by three.

(2.24 + 2.21 + 2.23) ÷ 3

3.x equals 6.68 outcomes in 2.226667/2.23 minutes ( rounded to 2 decimal places).

Average distance covered in 0.50 miles:

(Trials 1 minute + Trials 2 duration + Court hearing 3 minute) / 3

(3.16 + 3.08 + 3.15) ÷ 3

9.39 x 3 = 3.13 seconds

As a consequence, it takes 2.23 and 3.13 seconds, respectively, to reach 0.25 and 0.50 kilometers.

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Complete Question:

Calculate the average time it took the car to travel 0.25 and 0.50 meters with three washers attached to the pulley. Record the averages, rounded to two decimal places, in Table C of your Student Guide. What is the average time it took the car to travel 0.25 meters? seconds What is the average time it took the car to travel 0.50 meters? seconds

When the term 'light and variable' is used in reference to a winds aloft forecast, the coded group is typically represented by '00000' and the windspeed is indicated as less than 3 knots.

In meteorological forecasts, winds aloft are often expressed using coded groups called METAR or TAF codes. The coded group '00000' indicates that the wind direction is indeterminable or has no significant direction, and the wind speed is very low or negligible.When 'light and variable' is mentioned in a winds aloft forecast, it means that the wind direction is not well-defined or consistent, and the wind speed is below 3 knots, which is considered very light. This forecast suggests minimal or no significant wind movement at the indicated altitude.

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The substance that forms due to a chemical reaction is product. The correct option is G.

A chemical reaction is a process that converts one or more substances, known as reactants, into one or more various substances, known as products.

Chemical elements or substances are examples of substances. A chemical reaction reconfigures the constituent atoms of the reactants to produce various products.

Living things (cells, animals, humans, and insects) use chemical reactions to grow, develop, reproduce, and adapt.

When chemical bonds between molecules are formed or broken, chemical reactions occur.

The substances that initiate a chemical reaction are known as reactants, and the substances that result from the reaction are known as products.

Thus, the correct option is G.

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The magnitude of the resultant vector is 4.14m and the direction is 50°.

The resultant magnitude of the vector is the sum of the algebraic forces acting at the point.

The magnitude of the resultant vector, F is calculated below:

\(F = \sqrt{3.14^{2} + 2.71^{2}} = 4.14m\)

The direction is given below as follows:

\(x = tan^{-1} × \frac{3.14}{2.71} = 50\)

Therefore, the magnitude of the resultant vector is 4.14m and the direction is 50°.

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The efficiency of the system of the levers is  122%.

We have to note that the efficiency is the ratio of the work out put to the work out put multiplied by 100. In this case, we are told that a lift is used to carry boxes to the top floor of a hotel 20 m high. A total weight of 100 kg of boxes was carried up in 20 seconds. and that  the useful output of the engine driving the lift mechanism is 1.2 kilowatt.

Work input = 100 Kg * 9.8 m/s^2* 20 m = 19600 J

Work output = 1.2 kilowatt * 10^3 * 20 = 24000 J

Then we have;

Efficiency = Work out put/ Work input * 100

= 24000/19600 * 100

= 122%

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Answer:

.78 m/s north

Explanation:

Pls give brainliest if I correct

Answer:

2100 m

2804 g

4 '2 mm squares'

20,000 photos

Explanation:

1.5 km = 1500 m

1500 m + 600 m = 2100 m

2.8 kg = 2800 g

2800 g + 4 g = 2804 g

8mm tube / 2 mm squares

4 can fit

1 Gb = 1000 mb

40 Gb = 40,000 mb

40,000 mb / 2 mb = 20,000 photos

Here's all the help you need:

1).  1 km  =  1,000- m

2).  1 kg  =  1,000 g

3).  Freebie.  2 fits into 8 four times.

4).  1 mega...  =  1,000 kilo...

5).  1 Giga...  =  1,000 Mega...

Answer: The image is at a distance of 24 cm on the right of the lens, it will be an inverted, real image and has a height of 7 cm.

Explanation: To determine the position of the image of the object, use the Lens Equation, which is described by:

\(\frac{1}{f} = \frac{1}{u} +\frac{1}{v}\)

where

f is focal length;

u is distance of the object from the lens;

v is distance of the image of the pbject from the lens;

Calculating the position of the image will be:

\(\frac{1}{v} =\frac{1}{f} - \frac{1}{u}\)

\(\frac{1}{v} = \frac{1}{8} - \frac{1}{12}\)

\(\frac{1}{v} = \frac{1}{24}\)

v = 24 cm

Note that the distance of the image from the lens is positive. This means that the formed image is positioned at the right of the lens and is inverted.

For the height of the image, it can be used the Magnification (M) of an image:

M = \(\frac{h_{i}}{h_{o}} = \frac{v}{u}\)

where:

\(h_{i}\) is the height of the image

\(h_{o}\) is the height of the object

For this image:

\(\frac{h_{i}}{3.5} = \frac{24}{12}\)

\(h_{i} =\) 2 * 3.5

\(h_{i}\) = 7 cm

The image formed for this lens is 24 cm on the right of the lens, inverted related to the object and has height of 7 cm.

Answer:

The volume of a gas is dependent on pressure and temperature.

Explanation:

Pressure and temperature affect different gases differently giving varied conclusions to the exact volume of that gas.

:-befrank

The sum of the given masses expressed decimally in grams is 5.524 g.

To add the following masses and express the sum decimally in grams: 0.75 cg, 19 mg, 0.35 dg, 0.005335 kg, 0.127 g, we need to convert the units to the same base units.

The common base unit is gram (g). Therefore,

Therefore, 0.75 cg = 0.75 × 0.01 g = 0.0075 g

                 19 mg = 19 × 0.001 g = 0.019 g

                 0.35 dg = 0.35 × 0.1 g = 0.035 g

                 0.005335 kg = 0.005335 × 1000 g = 5.335 g

                 0.127 g = 0.127 g

Adding these masses together, we get:0.0075 g + 0.019 g + 0.035 g + 5.335 g + 0.127 g = 5.524 g. Therefore, the sum of the given masses expressed decimally in grams is 5.524 g.

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Answer:

b. 1.1 m/s c. -1.1 m/s

Explanation:

b.

m x v=f x t

The mass is 10 kg

10 x v (equation for momentum) = f x t (impulse)

you would find the impulse by finding the area under the graph, and then dividing by the mass

So in this case:

10 x v = 11

then divide by the mass

v = 11/10

v= 1.1 m/s

c.

F x t = impulse

we are trying to find force (magnitude)

impulse/t = F

we said that in order for it to stop the impulse for b would be 11, so if thats the case it would be 11 but it would be negative because when going in a positive direction and suddenly stopping the direction changes.

-11/t = F

to find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

-11/10 = F

F= -1.1 m/s

Answer B:

The velocity of the box at 10 seconds is :

              m x v=f x t

Given Information :

Mass(m)=10kg

Therefore, the velocity of the box at 10 seconds is 1.1m/s.

Answer C:

The magnitude and direction of that force be :

F x t = impulse

To find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

The magnitude and direction of that force will be -1.1m/s.

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a) Circuit b represents a circuit where the ammeter correctly measures the current in the headlight.

b) The current flowing in the ammeter for Circuit a would be 6.67 A.

c) The current flowing in the ammeter for Circuit b would be 6 A.

To ensure that the ammeter correctly measures the current in the headlight, it should be placed in series with the headlight, as shown in Circuit b.

To calculate the current flowing through the ammeter in Circuit a, we can use Ohm's Law, which states that I = V/R, where I is the current, V is the voltage, and R is the resistance. In this case, the voltage across the headlight and the ammeter is 12 V, and the resistance of the ammeter is 0.1 ohms. Therefore, the current flowing through the ammeter would be I = V/R = 12/1.8 = 6.67 A.

To calculate the current flowing through the ammeter in Circuit b, we can use the same formula. Since the ammeter and the headlight are in series, they have the same current flowing through them. Therefore, the current flowing through the ammeter would be 6 A, which is the same as the current specified by the manufacturer.

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Answer:

1kg =1000g

2.5kg

D=12m

t=11s

F=2.5KG

Explanation:

work done =f.d

=2.5×12

=30Nm

55-30

average speed

final - initial

divide by time t(s)

The minimum allowed length for the runway is  1170m.

a=3.30m/s2 is the acceleration of the plane

v=88.0 m/s is the final velocity of the plane

u=0m /s is the initial velocity of the plane

The acceleration of the object is the slope of the v-t graph, therefore,

Slope=Change in y component / Change in the x component

a = u- v / T f - T i

T f - T i =  v/a

T f - T i = 88/3.3

T f - T i = 26.67 s

The displacement,

d=1/2 b h

d=1/2(T f - T i ) * v

d = 1/2 * 26.67 s * 88.0 m / s

d = 1173.33

   = 1170m nearest three significant figures

Hence, the minimum allowed length for the runway is 1170m answers.

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The phase difference occurs at both transitions.

When light passes from one medium to another with a different refractive index, it undergoes a change in speed and direction, resulting in the phenomenon known as refraction. In this case, light travels from water (n = 1.5) to oil (n = 1.2), and then from oil to air (or vice versa).

At the first transition, when light passes from water to oil, there will be a phase difference. This is because the speed of light changes as it enters the oil, causing the wavefronts to bend and the phase of the wave to shift.

At the second transition, when light passes from oil to air, there will also be a phase difference. Again, the change in speed and direction of light as it enters the air causes the wavefronts to bend and the phase of the wave to shift.

Therefore, the correct answer is c) at both transitions

A phase difference occur: A phase difference occurs at both transitions. The correct option is c.

When light travels from one medium to another with a different refractive index, a phase difference occurs. In this case, the light travels from the pool of water (n = 1.5) to the layer of oil (n = 1.2), and then from the oil back to the water. At each transition, there is a change in the refractive index, causing the light waves to undergo a phase shift.

The phase shift is determined by the difference in the optical path length traveled by the light in the two media. Since the refractive index of oil is lower than that of water, the light waves experience a shorter optical path length in the oil compared to the water. This leads to a phase difference when the light waves pass through the interface between the water and oil, as well as when they pass back from the oil to the water.

Therefore, at both transitions, there will be a phase difference between the light waves due to the difference in refractive indices. The correct option is c.

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Complete question:

On a pool of water (n = 1.5) there is a thin layer of oil (n = 1.2). Where does a phase difference occur?

a) only at the first transition

b) only at the second transition

c) at both transitions

d) no phase difference

One step of copper mining requires blasting ore to be able to blasted and extracted from mine.

Mercury is used to recover minute pieces of gold that is mixed in soil and sediment. Sometimes Mercury can be lost in this process resulting in widespread contamination of local rivers and lakes.

Hundreds of tons of rock are unearthed, moved and crushed in mining operation significantly increasing the amount of dust and particulates in the air.

Strip mining (also known as mountaintop removal) involves scraping away earth and rocks to get to coal buried near the surface. This often results in the destruction of ecosystems.

one step of copper mining requires blasting ore to be able to blasted and extracted from the mine

⇢During this process,the destruction caused will affect the soil and the ground ( Lithosphere)

Mercury is used to recover minute pieces of gold that is mixed in soil and sediment. Sometimes mercury can be lost in this process resulting in widespread contamination of local river and lakes

⇢ The widespread contamination of local river and lakes will pollute the water bodies ( hydrosphere)

Hundreds of tons of rock are unearthed, moved, and crushed in mining operations significantly increasing the amount of dust and particulates in the air.

⇢The particles which will get mixed in the air,will make it poisonous to breath, resulting in a polluted atmosphere

Strip mining (also known as mountaintop removal) involves scraping away earth and rocks to get to coal buried near the surface. This often results in the destruction of ecosystems

⇢This process has potential to destroy the ecosystem which comes under the biosphere

An object of mass “15kg” is in free fall in a vacuum where there is no resistance determine the acceleration of the object -9.8 m/s^2

An object of mass “15kg” is in free fall in a vacuum where there is no resistance

During a free fall motion an object acquires acceleration

a = g  ( gravity)

a = 9.8 m/s^2

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(a) The acceleration of the masses is determined as 1.1 m/s² in the direction of the 5 kg mass.

(b) The tension in the string in terms of gravity is T = g.

(a) The acceleration of the masses is calculated by applying Newton's second law of motion.

F(net) = ma

where;

(5 kg x 9.8 m/s² ) - (1 kg + 3 kg )9.8 m/s² = ma

9.8 N = (5kg + 1 kg + 3 kg )a

9.8 = 9a

a = 9.8 / 9

a = 1.1 m/s² in the direction of the 5 kg mass.

(b) The tension in the string in terms of gravity is calculated as follows;

T = ( 5kg)g - (1 kg + 3 kg ) g

T = 5g - 4g

T = g

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Answer:

it is c

Explanation:

a.p.e.x

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