If an object goes through a
chemical reaction, but does not
change in mass, that object has
A. the same amount of gravity
B. more gravity
C. less gravity

Answer:

When we have irregular objects, it may become very hard to calculate the volume of the object, as we actually can not use any simple equation to find it.

The mass is less tricky, just find a scale and wheight it, now we know the mass of the irregular object.

One way to measure the volume of the object is using water... how we do it?

Get some recipient with water, measure the height of the water.

Introduce your object into the water and totally submerge it, now the level of the water will rise. This is because as you introduce the object under the water, you are displacing up a given volume of water that has the same volume as the irregular object.

Now that you know the height of the water before and after you put your object, you can easily calculate the volume of water displaced, and that will be the volume of the object (the tricky part may be totally submerging the object if, for example, is wood and it floats, here you can use a thin wire to push it down but it will affect a little bit the measures.)

Condensation and precipitation are two interrelated processes in the water cycle. Condensation refers to the transformation of water vapor into liquid form due to cooling or compression. Precipitation, on the other hand, is the release of condensed water droplets or ice crystals from clouds to the ground.

While the two terms are related, they are not synonymous. Condensation does not always result in precipitation. For instance, if the condensed water droplets are small and light enough, they may remain suspended in the air as clouds. However, if the droplets become too heavy and gravity overcomes the cloud's updraft, they will fall as precipitation. Precipitation can take many forms, including rain, snow, hail, and sleet.

It is an essential component of the water cycle, replenishing the earth's water supply and sustaining life. Overall, while condensation is a necessary precursor to precipitation, it is not always a guarantee that it will occur.

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Answer:

Soft serve ice cream

Explanation:

1g fat = 9 calories

take the fat numbers for each option and multiple by 9 and see who gives you 101

vanilla ice cream = 11.2 x 9 = 100.8 rounded to 101

frozen yogurt = 4 x 9 = 36

French fries = 24.7 x 9 = 222.3

pretzels = 1 x 9 = 9

Answer:

option b has the correct answer of given statement

The work done by the dog is 0.81J.

Work done is a measure of energy expended in moving an object; most commonly calculated by multiplying the force by the distance.

It is said that no work is done if the object does not move.

The work done on an object is the amount of energy transferred to an object through work.

According to this question, a dog lifts a 0.75 kg bone straight up through a distance of 0.11 m. The force applied to break the bone must be calculated first as follows:

Force = mass × acceleration

Force = 0.75kg × 9.8m/s²

Force = 7.35N

Work done = 7.35N × 0.11m = 0.81J

Therefore, 0.81J is the work done by the dog.

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Answer:

wt f i dont care

Explanation:

Answer:

All objects are composed of these atoms. ... Charged objects have an imbalance of charge - either more negative electrons than positive protons or vice versa. And neutral objects have a balance of charge - equal numbers of protons and electrons.

Explanation:

The power of the man is approximately 43.87 Watts.

First, let's convert the time taken to run up the hill from minutes to seconds:

t = 15 minutes = 900 seconds

Next, let's calculate the work done by the man to climb the hill:

Work = force x distance

= weight x height

= mgΔh

= (100 kg)(9.87 m/s^2)(40 m)

= 39,480 Joules

Now, let's calculate the power:

Power = Work / Time

= 39,480 J / 900 s

= 43.87 Watts

Therefore,  the power of a man weighing 100kg if he runs to the top of a hill of height 40meters on 15minutes is 43.87 Watts.

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Explanation:

the value of work done is zero because the man failed to move the wall through a distance.

Answer:

work done is force times the distance... FxD where both are zero....

The wavelength of a sound wave has a speed of 339 m/s and frequency of 640 hz.is 0.79 m. The correct answer is C.

The formula for finding wavelength is:

wavelength = speed of sound / frequency

Given the speed of sound as 339 m/s and the frequency as 640 Hz, we can substitute these values in the formula to get:

wavelength = 339 / 640

wavelength = 0.528125 meters

However, we need to round off this answer to the nearest hundredth, which gives us:

wavelength = 0.79 meters

Therefore, the correct answer is C. 0.79 meters.

Sound waves are a type of mechanical wave that travel through a medium, such as air, water, or solids.

They are characterized by their frequency, wavelength, and amplitude. Frequency is the number of cycles of the wave that occur in one second, and it is measured in hertz (Hz). Wavelength is the distance between two consecutive points on the wave that are in phase, and it is measured in meters (m). Amplitude is the maximum displacement of the wave from its rest position, and it is measured in decibels (dB).

The speed of a sound wave depends on the properties of the medium through which it is traveling, such as its density and elasticity. In general, sound waves travel faster through solids and liquids than through gases, because the molecules in solids and liquids are closer together and can transmit the wave more efficiently.

Therefore, the correct answer is C. 0.79 meters.

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Answer:

when a two bodies A and B are moving at an angle 180° with each other then the relative velocity is the sum of bodies the velocity .i.e,

when the bodies move the opposite direction

then their relative velocity is the sum of individual velocities.

In conclusion, developing and maintaining operational and process documentation for the HPC environment involves identifying services, documenting procedures and workflows, providing examples, and regularly updating the documentation. This ensures that the HPC environment continues to support complex campus research requirements effectively.

To develop and maintain operational and process documentation for the HPC (High Performance Computing) environment, there are several steps you can follow:
1. Identify the diverse set of services required: Understand the specific research requirements of the campus and determine the different services that the HPC environment needs to support.
2. Document operational procedures: Create step-by-step instructions for tasks such as system setup, software installation, user access management, and data backup. These documents should provide clear guidelines for administrators to follow.
3. Document process workflows: Define the processes involved in running specific research tasks on the HPC environment. This could include data preprocessing, job submission, monitoring, and result analysis. Documenting these workflows helps ensure consistency and reproducibility.
4. Provide examples and illustrations: Include examples and diagrams to make the documentation more understandable. For instance, you could include screenshots of the user interface, sample scripts, or flowcharts to illustrate the workflows.
5. Update and review regularly: As the HPC environment evolves, ensure that the documentation remains up-to-date. Regularly review and revise the content to reflect any changes in hardware, software, or research requirements.
In conclusion, developing and maintaining operational and process documentation for the HPC environment involves identifying services, documenting procedures and workflows, providing examples, and regularly updating the documentation. This ensures that the HPC environment continues to support complex campus research requirements effectively.

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Answer:

It would lift the object to the same height than before you move it 3 centimeters to the left. You see, the height doesn't change if you move the inclined plane horizontally, because height is a vertical variable.

Therefore, if the inclined plane has a height of 1 meters, then the object will be lifted 1 meters up, no matter if you move the inclined plane 50 meters horizontally, it won't change its height.

The net force is the vector

∑ F = (450 N) (cos(42°) i + sin(42°) j)

and two of the forces provided by the girls are

F₁ = (310 N) (cos(115°) i + sin(115°) j)

F₂ = (250 N) (cos(285°) i + sin(285°) j)

Then the force provided by the third girl is the vector

F₃ = ∑ F - F₁ - F₂

F₃ = ((450 N) cos(42°) - (310 N) cos(115°) - (250 N) cos(285°)) i

… … … + ((450 N) sin(42°) - (310 N) sin(115°) - (250 N) sin(285°)) j

F₃ ≈ (400.722 N) i + (261.635 N) j

So, the third girl provided a force of magnitude

||F₃|| = √((400.722 N)² + (261.635 N)²) ≈ 478.572 N ≈ 480 N

pointing in a direction

arctan((261.635 N)/(400.722 N)) ≈ 33.1409° ≈ 33°

relative to East which refers to 0°; that is, 33° N of E or E33°N. Since the other forces are given relative to North or South, we can write this direction as N57°E.

So, the third girl pushed with force 480 N [N57°E].

BMI (body mass index), which is based on the height and weight of a person, is an inaccurate measure of body fat content and does not take into account muscle mass, bone density, overall body composition, and racial and sex differences.

Body Mass Index:

The body mass index (BMI) is a measurement based on a person's mass (weight) and height. The BMI is calculated by dividing the body weight by the square of the height, and it is expressed in kilogrammes per square metre (kg/m2) since weight is measured in kilogrammes and height is measured in metres.

Using BMI as a sole metric can actually be misleading because people who have large amounts of lean muscle mass can actually be characterized as being overweight or obese based on their height and weight. Weight versus height is a somewhat crude measurement as it doesn't distinguish the amount of body weight that comes from lean versus fatty tissue.

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The rotational energy of the system after the distance between the astronauts is shortened to 5.00m can be calculated using the equation for rotational kinetic energy. The equation is given by the formula KE_rot = 0.5 * I * ω^2, where KE_rot is the rotational kinetic energy, I is the moment of inertia, and ω is the angular velocity.

In this case, since the astronauts are treated as particles, the moment of inertia can be calculated using the equation I = m * r^2, where m is the mass of the astronauts and r is the distance between them. Substituting the given values, we have I = (2 * 75.0kg) * (5.00m)^2 = 3750 kg * m^2.

The angular velocity ω can be calculated using the equation ω = v / r, where v is the speed of the astronauts. Substituting the given values, we have ω = 5.00m/s / 5.00m = 1.00 rad/s.

Now, substituting the calculated values for I and ω into the formula for rotational kinetic energy, we have KE_rot = 0.5 * 3750 kg * m^2 * (1.00 rad/s)^2 = 1875 J.

Therefore, the rotational energy of the system after the distance between the astronauts is shortened to 5.00m is 1875 J.

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C) South

As we know that, north is considered as negative, and south as positive. Now, the charge on particle is negative; so, when we will release it, it will move towards the south.

In the scenario where the negatively charged particle is placed in a uniform electric field, the direction will be C. South.

It should be noted that an electric field simply means the physical field which surrounds electrically charged particles.

Since the negatively charged particle is placed in a uniform electric field directed from South to North, the direction that the particle move after it is released is South.

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Answer:

a and c

Explanation:

a)light moves in a straight line and distracts when it encounters an obstacle forming a shadow

c)the light rays from that object or also tgose from the image must enter your eye for you to see that image

Answer:

3000 N

Explanation:

We have,

• Mass, m = 1000 kg

• Acceleration, a = 3 m/s²

We have to find force required, F.

\(\longrightarrow\) F = ma

\(\longrightarrow\) F = 1000 × 3 N

\(\longrightarrow\) F = 3000 N (Answer)

From the question, the compression that is able to produce the maximum speed is 1.73 m.

We can see that there is potential energy stored in the spring. This energy can be converted into kinetic energy when a spring is released. In this case, the spring can now be able to do a meaningful work as we can see.

The image that shows the set up of the question can be seen clearly in the image that is attached to this answer as we can see. We can now write the following;

W = dmgsin∅

Where W is the work done by the spring, we have;

1/2 kx² = dmgsin∅

k = force constant

x = compression

d = distance covered

∅ = angle covered

Thus we can substitute the values as;

(0.5 * 170 * x²) = 4 * 13 * 9.8 * sin 30

x² = 4 * 13 * 9.8 * sin 30/0.5 * 170

x² = 254.8/85

x = 1.73 m

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Answer:

W = 1250 J = 1.25 KJ

Explanation:

The work done by the boy is due to the change in the position of the cement vertically. Hence, the work done in this case will be equal to the potential energy of the cement:

\(W = P.E\\W = mgh\)

where,

W = Work done = ?

mg = W = weight of cement = 500 N

h = height covered = 2.5 m

Therefore,

\(W = (500\ N)(2.5\ m)\)

W = 1250 J = 1.25 KJ

The equilibrium height h will the wire cd rise, assuming that the magnetic force on it is due entirely to the current in the wire ab is h = (μ0 × I² × λ) / (4 × π × g).

The magnetic force acting on wire CD due to the current in wire AB causes it to rise. The equilibrium height of wire CD is determined by balancing the magnetic force acting upward with the gravitational force acting downward.

The magnetic force is given by F = μ0 × I1 × I2 × L / (2 × π × r), where μ0 is the permeability of free space, I1 and I2 are the currents in wires AB and CD respectively, L is the length of wire CD, and r is the distance between the wires.

Since the currents in wires AB and CD are equal and opposite, we have I1 = -I2. Substituting this into the above equation and solving for L, we get L = (μ0 × I² × λ) / (2 × π × g), where λ is the mass per unit length of wire CD and g is the acceleration due to gravity.

The equilibrium height of wire CD is then h = L / 2, since the center of mass of wire CD rises to the midpoint of its length when it is in equilibrium. Thus, we have h = (μ0 × I² × λ) / (4 × π × g).

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The question is -

A long, horizontal wire AB rests on the surface of a table and carries a current I. Horizontal wire CD is vertically above wire AB and is free to slide up and down on the two vertical metal guides C and D (the figure ). Wire CD is connected through the sliding contacts to another wire that also carries a current I, opposite in direction to the current in wire AB. The mass per unit length of the wire CD is λ. To what equilibrium height (h) will the wire CD rise, assuming that the magnetic force on it is due entirely to the current in the wire AB? (Express your answer in terms of the variables I, λ, and appropriate constants (μ0,π, g))

With the use of the second equation of motion formula, the speed the car travelled when the rockets were fired is 12 m/s.

Linear motion depicts movement in a straight line. While speed is the distance travelled per time taken.

Given that In a test run, a rocket-powered car is driving down a test track at a constant speed when the rockets are fired. it then accelerates at 4 m/s2 for 8.0 s covering a distance of 224 m.

The given parameters are;

The speed the car travelled when the rockets were fired can be calculated by using the below formula

s = ut + 1/2a\(t^{2}\)

Substitute all the parameters into the formula

224 = 8u + 1/2 x 4 x \(8^{2}\)

224 =8u + 2 x 64

224 = 8u + 128

224 - 128 = 8u

8u = 96

u = 96/8

u = 12 m/s

Therefore, the speed the car travelled when the rockets were fired is 12 m/s.

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The light waves just below the frequencies in the visible spectrum extending up are called ultraviolet (UV) light waves.

The spectrum of light waves is categorized based on their wavelength and frequency. Visible light waves are the only waves that can be seen by the human eye and they range from violet to red. However, just beyond the violet end of the spectrum lie the UV light waves. These waves have shorter wavelengths and higher frequencies than visible light waves. UV light is invisible to the human eye but can be detected by specialized equipment such as UV lamps or black lights. UV light waves are commonly used in medical and scientific fields for sterilization, fluorescence, and DNA analysis.

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A piece of steel sinks in water because steel is denser than water. However, a steel ship is a hollow object made of steel and contains a lot of air in it. Due to presence of a lot of air in it, the average density of the ship becomes less than the density of water. Hence a ship floats in water.

Answer:

Cause its a steel block

Explanation:

thats like putting a brick in the water and expecting it to float

Answer:

c

step by step explanation  

discharges let electric charge move freely

Answer:

definitely b

Explanation:

conductors let electric charges move freely whereas insulators and discharge don't

hope this helps