4
suzanna notices that when she rolls a marble on the carpet, the marble slows down and stops. what
force causes the marble to change its motion? how does this force act?

The equivalent distance in miles is 3.78 miles.

The distance Randy needs to travel in miles is calculated as follows;

5280 ft = 1 mile

20,000 ft = ? miles

= 20,000 ft / (5280 ft/mile)

= 3.78 miles

If after the potato sack race, Randy needs to drive to an office chair race that is 20,000 feet away. The equivalent distance in miles is 3.78 miles.

Learn more about distance conversion here: https://brainly.com/question/2695274

#SPJ1

Answer: Hubble's discovery in the 1920's of a relationship between a galaxy's distance from Earth and its speed; and the discovery in the 1960's of cosmic microwave background radiation.

Explanation:

Answer:

Light travels at 3.0 x 108 m/s in a vacuum.

Explanation:

Light travels at 3.0 x 108 m/s in a vacuum.

In ohms, the resistance of the unknown resistor is 6.19 amps.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Therefore in ohm's law, V = IR

V = voltage

I = current

R = resistance

To calculate the resistance, we have

R = V/I

where Voltage = 29.7

Current , I = 4.8

Resistance= 29.7/ 4.8 = 6.19 amps

In conclusion, Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.

Learn more about the ohms law at:  https://brainly.com/question/231741

#SPJ1

The maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

To calculate the maximum possible speed of the train at the end of the first 4.0 km of the journey, we can apply the principle of conservation of energy.

Assuming there are no external forces like friction or air resistance, the initial potential energy of the train will be converted into kinetic energy.

The potential energy (PE) of the train at the beginning of the journey can be calculated as PE = mgh, where m is the mass of the train, g is the acceleration due to gravity (approximately \(9.8 m/s^2\)), and h is the height difference (in this case, we assume it to be zero).

The kinetic energy (KE) of the train at the end of the 4.0 km journey can be calculated as \(KE = (1/2)mv^2\), where v is the velocity of the train.

Since the potential energy is converted into kinetic energy, we can equate the two expressions:

PE = KE

\(mgh = (1/2)mv^2\)

Simplifying and canceling out the mass:

\(gh = (1/2)v^2\)

Substituting the values, \(g = 9.8 m/s^2\)and h = 0, we get:

\((9.8 m/s^2)(0) = (1/2)v^2\)

Simplifying further:

\(0 = (1/2)v^2\)

This equation tells us that the maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

For more questions on speed

https://brainly.com/question/26046491

#SPJ8

The efficiency of the machine is 50%.

What is an of efficiency of a machine?

The efficiency of a machine is determined by its ability to perform a task with minimal waste of energy or resources. Efficiency can be measured in terms of energy, time, cost, or quality of output. Factors that affect efficiency include the design of the machine, the quality of its components, and the skill of its operator.

 An example of the efficiency of a machine is a washing machine that uses less energy and water to get the same amount of clothing clean as a traditional machine.

The efficiency of the machine can be calculated using the formula:

Efficiency = (Output Work / Input Work) x 100%

Output Work = ma * height = 500 kg * 20 m = 10000 J (Joule)

Input Work = Power * Time = 2000 W * 10 s = 20000 J (Joule)

Efficiency = (10000 J / 20000 J) x 100% = 50%.

So the efficiency of the machine is 50%.

Therefore, 50% is the answer.

To learn more about efficiency of a machine from the link

https://brainly.com/question/11752408

#SPJ1

Answer:

there it is fella

we neglect the mass data

\(\bold{Heya!}\)

(b) comb induces a net dipole moment opposite to the direction of field.

When a comb rubbed with dry hair it's attracts pieces of piece of paper. This is because the comb that induces of the dipole net that of the moment thatopposite of the field. And, This happens the field dueing to charge of the comb induces of the dipole moment in the paper of the molecules in the dielectric.

Hopefully This Helps ! ~

#LearnWithBrainly

\(\underline{Answer :}\)

Jaceysan ~

Answer:

Option B

Explanation:

When a comb is rubbed with dry hair it induces some charge or its get charged either positive or negative

As paper remains in neutral hence it attracts the paper

Hence option B is correct

In parabolic solar cooker, the container of cooking is placed at the focal point of mirror of parabolic shape so that all rays that are falling on solar cooker can converge to one point and produce large amount of heat energy.

A parabolic solar cooker is a cooking device that works on the energy generated from solar panel.

Though solar cookers are slow to cook, they are green sources of energy utilizer as well as renewable source of energy.

Parabolic solar cookers make the use of a reflector which is parabolic in shape to concentrate sunlight into a smaller area in order to generate heat for cooking. They are able to reach high temperatures, which allows them to be used for grilling and frying. These temperatures are significantly higher than what can be reached by a solar box cookers or solar panel cookers .

#SPJ9

Answer:

(1) body composition, (2) flexibility, (3) muscular strength, (4) muscular endurance, and (5) cardiorespiratory endurance. 

Answer:

Is this a research paper?

If you stepped into a hole that passed completely through Earth, a one-way trip would take approximately 42 minutes, and a round trip would take approximately 84 minutes.

If you stepped into a hole that passed completely through Earth, the time it would take for a one-way trip would be approximately 42 minutes and 12 seconds. This is based on the assumption that the hole is a perfect vacuum and there is no air resistance, gravity is constant throughout the journey, and the Earth is a perfect sphere.

During the first half of the journey, you would accelerate due to gravity, reaching your maximum speed at the center of the Earth. You would then start to decelerate until you reached the other side of the Earth, where you would come to a momentary stop before falling back down and repeating the process. The total distance traveled would be approximately 12,742 kilometers, which is the diameter of the Earth.

The round trip would take approximately 84 minutes and 24 seconds. This is because the time it takes to travel from one side of the Earth to the other is the same as the time it takes to return back to the starting point.

More on earth: https://brainly.com/question/13031095

#SPJ11

Answer:

There should be a certain age limit Idon't know

Explanation:

This equation for angle_glass will give us the incident angle for 470 nm light in flint glass, which is approximately 71.3 degrees.

The incident angle at which 470 nm light must enter flint glass to have the same angle of refraction can be determined using Snell's Law. Snell's Law states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the refractive indices of the two mediums.

Incident angle of 610 nm light in fused quartz: 55.0 degrees

Refractive index of air (n_air): 1.00

Refractive index of fused quartz (n_quartz): 1.458

Refractive index of flint glass (n_glass): 1.66

To find the incident angle for 470 nm light in flint glass, we can set up the equation using Snell's Law:

n_air * sin(angle_air) = n_glass * sin(angle_glass)

We know the refractive indices and the incident angle for the light in fused quartz. Let's denote the incident angle for the light in flint glass as angle_glass.

n_air * sin(55.0 degrees) = n_glass * sin(angle_glass)

Solving this equation for angle_glass will give us the incident angle for 470 nm light in flint glass, which is approximately 71.3 degrees.

To know more about Snell's Law, refer here:

https://brainly.com/question/8757345#

#SPJ11

Answer:

I think its 1

Explanation:

The reason why I think it's 1 is because 0.5m/s^2 /0.5 m/s= 1 s

Answer:

10m per Second

Explanation:

Answer:

In general there are three sub-segments of "alternative" energy investment: solar energy, wind energy and hybrid electric vehicles

Answer:

vii. c

ix. a

x. d

Explanation:

trust

Given,

The current, I=0.25 A

The total charge flowing in the circuit is q=6812 C.

The electric current can be defined as the time rate of flow of the charges.

Thus, the electric current is given by,

Where t is the time duration.

Thus the batteries will fry out after 27248 s

Answer: The free - body diagrams for blocks A and B. frictionless surface by a constant horizontal force F = 100 N. Find the tension in the cord between the 5 kg and 10 kg blocks. The string that attaches it to the block of mass M2 passes over a frictionless pulley of negligible mass. The coefficient of kinetic friction Hk between M.

Explanation: Hope this helped :)

Answer:

Hi, thank you for posting your question here at Brainly.

To find the velocity of light or any electromagnetic wave, we use the equation: v = wavelength * frequency. Substituting,

v = 0.5 m * 930 1/s

v = 465 m/s

Brainiest please

Explanation:

The wind that is blowing over the house flows in the window and out the chimney.

Air Flow at Home:

Air is a solution of diatomic gas. Air will flow from a high pressure to low pressure. Usually, the roof area has low pressure thus, air flows from inside the house and out to the chimney; if there is any. In this case, the chimney should have a correct size to avoid updraft.

Air flows from a high pressure point to a low pressure point to find equilibrium. In this case, since the wind is blowing over the house, the pressure at that area will be low. With this, the lower part of the house will have a relatively high pressure compared to the roof. Thus, the air will flow in the window and outside of the chimney.

learn more about Air flow:

https://brainly.com/question/2491299

#SPJ4

A  human-designed system  is computer. Four important of computer is:

Learn more about computer here:

https://brainly.com/question/21080395

#SPJ1

( True ) Pluto is the farthest planet from the sun in our solar system. Its average distance from the sun is about 3.7 billion miles. Due to this vast distance, the intensity of sunlight reaching Pluto is significantly weaker than on Earth. From Pluto's perspective, the sun appears as a very bright star in the sky, rather than a massive glowing ball.

The sun's apparent magnitude, which is a measure of its brightness as seen from Earth, is about -26.7. However, when viewed from Pluto, the sun's apparent magnitude drops to about -19.5, which is more than a thousand times fainter. This is because the intensity of sunlight decreases with distance, following the inverse-square law. Therefore, the sun would appear much dimmer to an observer on Pluto than on Earth.

To Learn more about Pluto. Click this!

brainly.com/question/32308483

#SPJ11

Rather than issue an electrical signal over the cable as twisted pair cable testers do, a fiber optic cable transmits light-based signals of different wavelengths.

A fiber-optic cable, also known as an optical-fiber cable, is an assembly similar to an electrical cable but containing one or more optical fibers that are used to carry light. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable is used. Optical fiber consists of a core and a cladding layer, selected for total internal reflection due to the difference in the refractive index between the two. In practical fibers, the cladding is usually coated with a layer of acrylate polymer or polyimide. Different types of cable are used for optical communication in different applications, for example, long-distance telecommunication or providing a high-speed data connection between different parts of a building.

Learn more about fiber optic cable  at

https://brainly.com/question/30267683

#SPJ11

A decigram and a dekagram are both units of mass in the metric system, but they differ in magnitude. A decigram is a smaller unit of mass, while a dekagram is a larger unit of mass.

The decigram (dg) is equal to one-tenth of a gram (1 dg = 0.1 g). It is commonly used for measuring small amounts of substances or for precise measurements in laboratory settings. For example, a typical paperclip has a mass of approximately 1 gram, which is equivalent to 10 decigrams.

On the other hand, the dekagram (dag) is equal to ten grams (1 dag = 10 g). It is a larger unit of mass and is often used to measure quantities of food or ingredients in cooking. For instance, a typical serving of meat may weigh around 100 grams, which is equivalent to 10 dekagrams.

Therefore, the relationship between a decigram and a dekagram is that a dekagram is ten times larger than a decigram. They represent different magnitudes of mass within the metric system, with the decigram being smaller and the dekagram being larger.

Learn more about magnitudes

https://brainly.com/question/30337362

#SPJ11

a) The A-parameters of the cascaded network are defined by (4 points)Answer:a_11 = 0.149 S^0.5 - 0.0565a_12 = -0.115 S^0.5 - 0.0352a_21 = 136 S^0.5 - 133a_22 = -89.5 S^0.5 + 135b) Find ZL such that maximum power is transferred from the cascaded network to ZL. (2 pointsZ). The maximum power transfer to load impedance ZL occurs when the load is equal to the complex conjugate of the source impedance.

We can calculate the source impedance as follows: Rs = 30 Ω || 1/0.167^2 = 31.2 ΩThe equivalent impedance of circuits 2 and 3 connected in cascade is: Zeq = Z2 + Z3 + Z2 Z3 Y2Z2 + Y3 (Z2 + Z3) + Y2 Y3If we substitute the corresponding values: Zeq = 6.875 - j10.75ΩNow we can determine the value of the load impedance: ZL = Rs* Zeq/(Rs + Zeq)ZL = 17.6 - j8.9Ωc) Evaluate the maximum power that the cascaded two-port network can deliver to ZI. (2 points). The maximum power that can be delivered to the load is half the power available in the source.

We can determine the available power as follows: P = (I_s)^2 * Rs /2P = 558 mW. Now we can calculate the maximum power transferred to the load using the value of ZL:$$P_{load} = \frac{V_{load}^2}{4 Re(Z_L)}$$$$V_{load} = a_{21} I_s Z_2 Z_3$$So,$$P_{load} = \frac{(a_{21} I_s Z_2 Z_3)^2}{4 Re(Z_L)}$$Substitute the corresponding values:$$P_{load} = 203.2 m W $$. Therefore, the maximum power that can be delivered to the load is 203.2 mW.

To know more about cascaded network click here:

https://brainly.com/question/31689242

#SPJ11

The lens will further magnify the specimen to form a virtual image received by the eye as an objective, projection. Option A.

Compound microscopes combine two sets of lenses an eyepiece, and an objective, and are used to observe specimens at high magnification. The objective collects light from the sample magnify the image of the sample, and project the magnified image onto the tube.

The microscope with the highest magnification and resolution is the electron microscope. This is an optical instrument designed to allow us to see minute details down to the atomic scale. Compound microscopes have two lens systems for increased magnification. Before purchasing or using a microscope it is important to understand the function of each part.

Learn more about Magnification here:-https://brainly.com/question/15744335

#SPJ4

Answer:

jsjsjsjsmkskskskksksks

Answer:

1) e

2)c

3)b

4)d

i dont know if these are right, but something along these lines if you understand the pattern

Explanation: