a system absorbs heat q and has an equal amount of work done on it. what is the change in thermal (internal) energy of the system?

When standing on a train accelerating at 0.30 g, there is an effective force acting on you due to the acceleration. This force is equivalent to the force that would be experienced by an object with mass m = your mass under the influence of gravity and this force is resisted by the static friction force:

F = m * a

where a is the acceleration of the train and g is the acceleration due to gravity (approx. 9.81 m/s^2).

To avoid sliding on the floor of the train, the static friction force between your feet and the floor must be greater than or equal to the force due to the acceleration of the train. Therefore, we have:

f_s >= m * a

where f_s is the static friction force.

The maximum static friction force that can act between your feet and the floor is given by:

f_s = μ_s * N

where μ_s is the coefficient of static friction between your feet and the floor, and N is the normal force acting on your feet.

Since you are standing still relative to the train, the normal force acting on your feet is equal to your weight, which we can express as:

N = m * g

Substituting this into the expression for the maximum static friction force, we get:

f_s = μ_s * m * g

Substituting this expression for f_s into the inequality above, we get:

μ_s * m * g >= m * a

Simplifying this expression, we get:

μ_s >= a / g

Substituting a = 0.30 g and g = 9.81 m/s^2, we get:

μ_s >= 0.30

Therefore, the minimum coefficient of static friction that must exist between your feet and the floor to avoid sliding on the train is 0.30.

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Answer:

B

Explanation:

 A Mechanical Advantage is when you use a piece of machinery to help you do work, and it is an easy advantage.

The correct option is B. The spectrum of a signal is the range of frequencies in the signal.

A spectrum (plural spectra or spectrums) is a condition that isn't restricted to a specific set of values but can vary, without gaps, across a continuum. The word became first used scientifically in optics to explain the rainbow of colors in visible light after passing via a prism. As clinical information of mild superior, it got here to apply to the whole electromagnetic spectrum. It thereby has become a mapping of a variety of magnitudes (wavelengths) to a range of traits, which are the perceived "shades of the rainbow" and different houses which correspond to wavelengths that lie outdoors of the visible light spectrum.

Spectrum has due to the fact that been implemented via analogy to topics outside optics. therefore, one would possibly communicate approximately the "spectrum of political opinion", the "spectrum of interest" of a drug, or the "autism spectrum". In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such makes use of implying a wide variety of situations or behaviors grouped together and studied under an unmarried identity for ease of discussion. Nonscientific makes use of the time period spectrum is once in a while deceptive.

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Complete Question:

The spectrum of a signal is:

A. the lowest frequency value subtracted from the highest

B. the range of frequencies in the signal

C. all of the frequencies from 0 to the highest frequency used

D. the average of the highest frequency and the lowest

Answer:

Explanation:

General concepts of physics

Newton's laws of motion.

Mass, force and weight (Mass versus weight)

Momentum and conservation of energy.

Gravity, theories of gravity.

Energy, work, and their relationship.

Motion, position, and energy.

The important concepts of physics include -

We have to discuss about the important concepts of physics

Physics involves the study of matter, energy and interactions between them.

The five important concepts of physics include -

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Answer:

Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.

Answer:

here are six stages within each of the divisions, namely prophase, prometaphase, metaphase, anaphase, telophase and cytokinesis

Explanation:

The molality of the solution made by dissolving 4.08 g of hexane in 89.1 g of benzene is 0.527 M

This is simply defined as the mole of solute per kilogram of solvent. It can be expressed mathematically as:

Molality = mole of solute / mass (in Kg) of solvent

Mole = mass / molar mass

Mole of hexane = 4.08 / 86

Mole of hexane = 0.047 mole

The molality of the solution can be obtained as illustrated below:

Molality = mole of solute / mass (in Kg) of solvent

Molality = 0.047 / 0.0891

Molality = 0.527 M

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Answer:

0.120m

Explanation:

Answer:

G = 6.67

Explanation:

power = work done / time taken

= 20/4

= 5 watt

hope it helps

Other person is incorrect, I did the test on edg.

Answer:  

A. by providing water for irrigation and restoring trees to areas where forests once existed

The construction of dams positively affect natural resources by providing water for irrigation.

Natural resources serves as materials thst is found in nature which are used by humans. These natural substances are soil, water.

Therefore, building of dams can help irrigation by using water which is a natural resources.

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Answer: if the door knob is metal the static electricity will exit your body, but shock you in the process

Explanation:

Answer:

Processes are all the related activities (parts) inside the system that work together to make it function. ... It's important that processes are effective at what they do so that the system can run efficiently. Processes are the sequence of activities intended to produce a particular result.

Explanation:

Answer:A process is an instance of a program running in a computer. It is close in meaning to task, a term used in some operating system

Assuming that the man is standing still on a flat, horizontal surface and neglecting air resistance, the normal force produced by the ground upwards on the leg would be equal in magnitude to the weight of the man, which is given as approximately 84 kg.

Therefore, the normal force being produced by the ground upwards on the leg would be approximately 84 kg multiplied by the acceleration due to gravity (9.81 m/s^2), which gives a value of approximately 823.44 N (Newtons).

So the normal force being produced by the ground upwards on the leg is approximately 823.44 N.

Answer: As air rises the moisture in it slowly reaches its saturation point and when this happens, tiny crystals of water start to condense and form clouds.

Explanation:

Answer:the specific heat is the measure of how much heat per unfit mass required to raise the temperature by 1 degrees Celsius.the formula is given as Q= cm T where

Q= the amount of heat added

C= specific heat of a substance

T= change in temperature in degrees Celsius

Q=(4186 j/kg degrees Celsius (.109 kg) (8.93- degrees Celsius)=4974.53J

Explanation:

The mass of the copper coin placed in 101g of water is 135.3g.

The mass of the copper coin can be calculated using the following expression:

Since; Q = mc∆T

Where;

mc∆T (water) = mc∆T (copper)

According to this question;

COPPER METAL:

WATER:

101 × 4.18 × 8.39 = (0.385 × m × 68)

3542.09 = 26.18m

m = 3542.09 ÷ 26.18

m = 135.3g

Therefore, the mass of the copper coin placed in 101g of water is 135.3g.

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Answer:

A. Potassium

C. Hydrogen

Explanation:

\(F=k(l_1-l_2)\)

\(10=5k\)

\(k=2\)

\(15=2*(30-l_2)\)

\(15=60-2l_2\)

\(2l_2=45\)

\(l_2=22,5cm\)

Answer:

all the resistors are connected in series.

Answer:

B. 1.750 x 10^3

Explanation:

1/2 * 35 * 10^2

To position the cable so that it is not under tension, it is necessary to have Train conductors or train drivers.

A person who operates a train, multiple unit, or locomotive is known as a train driver, engine driver, engineman, or locomotive driver. In the United States and Canada, these terms are frequently used to refer to engineers or railroad engineers. The train's mechanical operation, speed, and overall train handling are under the driver's control and responsibility (also known as brake handling). In American English, a hostler (also known as a switcher) moves engines around train yards, but does not take them out on the normal tracks; the British English equivalent is a shunter.

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Answer:

the ball travels 0.85 miles per second

Explanation:

Answer:

0.85

Explanation:

Answer:

Kinetic energy is 2886.5Joule

To find the weight, we can use the formula weight = mass × acceleration due to gravity. Substituting the values, we have weight = 10 kg × 9.8 m/s², which gives us a weight of approximately 98 newtons. A bag of groceries that has a mass of 10 kilograms weighs approximately 98 newtons.

Weight is the force experienced by an object due to gravity. It is calculated by multiplying the mass of the object by the acceleration due to gravity. On Earth, the standard acceleration due to gravity is approximately 9.8 meters per second squared (m/s²).

In this case, the bag of groceries has a mass of 10 kilograms. To find the weight, we can use the formula weight = mass × acceleration due to gravity. Substituting the values, we have weight = 10 kg × 9.8 m/s², which gives us a weight of approximately 98 newtons.

Therefore, a bag of groceries with a mass of 10 kilograms weighs approximately 98 newtons when measured on Earth. It's important to note that weight can vary depending on the location, as the acceleration due to gravity may differ on different celestial bodies.

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The Earth has cooled for the past 2 million years.

Answer:

D

Explanation: need good posture other wise will injury yourself during activity

Answer:

720,000

Explanation:

change in momentum = m (v2-v1)

= 45,000(258-242)= 720,000

Answer:

what I do not understand :(

The best explanation for the baseball player's superstitious behavior is option A) Reinforced behavior, even if it is accidental, is more likely to be repeated.

This is because the player has associated tapping the plate with getting a hit, even though the two actions are not actually causally related. When the player taps the plate and then gets a hit, it is a coincidental reinforcement, but the player's brain associates the two events and reinforces the behavior of tapping the plate.

Option B) Operant behaviors are voluntary does not explain the superstitious behavior because even though the player may have started tapping the plate voluntarily, the behavior has become reinforced through coincidental reinforcement.

Option C) Immediate reinforcers are more effective when delayed in changing behavior is not relevant to this scenario because there is no delay in reinforcement.

Option D) Variable-ratio schedules produce high rates of responding is also not relevant because there is no clear schedule of reinforcement at play in the player's superstitious behavior.

Option E) Latent learning becomes apparent only when there is some incentive to demonstrate it is not applicable because the behavior is not learned through observation and imitation, but rather through coincidental reinforcement.

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