A student measured the maximum mass of salt that can dissolve in 100 mL of water at five different temperatures.

Which variable should go on the x-axis?


the volume of water

the mass of salt

the temperature of water

the mass of water
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The reason behind these materials being used to specifically protect against electrical hazards is that, they are insulators, at least to some degree; this means that when electricity enters in contact with the material it has trouble moving through and thus protects the user from the electricity (To certain degree).

Answer:

The correct answer is - radiant.

Explanation:

Electromagnetic waves are the transverse waves that get energy as radiation from the source and transfer to an absorber so, the radiant energy is the energy of electromagnetic waves.

Electromagnetic waves are can travel in space unlike mechanical waves and are made up of photons, tiny packets of energy. Electromagnetic waves or spectra include radio waves, infrared, light, microwaves, UV, X-rays, and gamma rays.

The density of a metal block having a mass of 10 cg and sides equaling 10, 15, and 20 centimeters is 3.33 × 10-⁵g/cm³.

The density of a substance can be calculated by dividing the mass of the substance by its volume.

That is;

Density = mass ÷ volume

According to this question, a metal block has a mass of 10 cg and sides equaling 10, 15, and 20 centimeters.

Volume of the metal block = 15 × 20 × 10 = 3000cm³

Mass of metal block in grams = 0.1g

Density of metal block = 0.1g ÷ 3000cm³

Density = 3.33 × 10-⁵g/cm³

Therefore, the density of a metal block having a mass of 10 cg and sides equaling 10, 15, and 20 centimeters is 3.33 × 10-⁵g/cm³.

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Answer:

Wood helps in home insulating because logs have both a proper structure and insulation. Since the log has so much heat storage, its huge mass will have a lot more thermal energy than other materials for insulating.

Use Newton's second law.

The object's mass is the same everywhere, so first compute the mass using the object's weight on Earth:

F = ma   ⇒   59 N = m (9.8 N/kg)   ⇒   m ≈ 6.02041 kg

Now compute the acceleration on the other planet:

F = ma   ⇒   40.5 N ≈ (6.02041 kg) a

⇒   a ≈ 6.72712 m/s² ≈ 6.7 m/s² ≈ 1.5g

where g = 9.8 m/s², just to express this acceleration relative to the gravitational acceleration at Earth's surface.

Answer:

in probability theory, a balance equation is an equation that describes the probability flux associated with a Markov chain in and out of states or set of states.

Explanation:

Answer:

mnnnnnbmbmmmmnnmmmmmmnnnnnnmmm.mm nooooo

Explanation:

awer some folom myy thans for dog

Answer:

The car stops in 7.78s and does not spare the child.

Explanation:

In order to know if the car stops before the distance to the child, you take into account the following equation:

\(x=x_o+v_ot-\frac{1}{2}at^2\)        (1)

vo: initial speed of the car = 45km/h

a: deceleration of the car = 2 m/s^2

t: time

xo: initial distance to the child = 25m

x: final distance to the child = 0m

It is necessary that the solution of the equation (1) for time t are real.

You first convert the initial speed to m/s, then replace the values of the parameters and solve the quadratic polynomial for t:

\(45\frac{km}{h}*\frac{1h}{3600s}*\frac{1000m}{1km}=12.5\frac{m}{s}\)

\(0=25+12.5t-2t^2\\\\2t^2-12.5t-25=0\\\\t_{1,2}=\frac{-(-12.5)\pm \sqrt{(-12.5)^2-4(2)(-25)}}{2(2)}\\\\t_{1,2}=\frac{12.25\pm 18.87}{4}\\\\t_1=7.78s\\\\t_2=-1.65s\)

You take the first value t1 because it has physical meaning.

The solution for t is real, then, the car stops in 7.78s and does not spare the child.

Answer:

C)

Explanation:

Earth's Rotation

Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution.

Answer: A

Explanation:

Pulmonary - is lungs

Systemic - is body system

This phenomenon is caused by the refraction of light as it passes from one medium (air) to another (water).

Light refraction breaks the stick where it reaches the water. Light refracts when it goes from air to water. Light changes speed and direction when it flows from air to water. Refraction causes this alteration. The angle light enters the water determines refraction.

In this situation, the stick appears to move because light rays from the submerged section bend or refract as they transit from water to air. This optical illusion makes the stick look shattered at the water's surface.

Light refraction at the air-water contact makes the stick seem shattered.

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The diagram of the eye correctly focuses a distant object onto the retina when the eye is air-filled. The image formed will be behind the retina if the eye is filled with water.

The diagram of the eye is shown below: It correctly focuses a distant object onto the retina when the eye is air-filled. If the eye is actually filled with water, the image formed will be behind the retina. This is because the refractive index of water is higher than that of air, and this causes the image to be formed further back. The diagram below shows this change when the eye is filled with water.

The diagram of the eye correctly focuses a distant object onto the retina when the eye is air-filled. The image formed will be behind the retina if the eye is filled with water.

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Answer:

v = 15.23 m/s

Explanation:

Given that,

Mass of a car, m = 1110 kg

Initial velocity, u = 21 m/s

Force,F = -8000 N

Time, t = 0.9 s

We need to find the final velocity of the car.

Force, F = ma

\(F=\dfrac{m(v-u)}{t}\\\\v-u=\dfrac{Ft}{m}\\\\v=\dfrac{Ft}{m}+u\\\\v=\dfrac{-8000\times 0.8}{1110}+21\\\\v=15.23\ m/s\)

So, the final velocity of the car is 15.23 m/s.

Answer:

44J

Explanation:

Given parameters:

Mass of rock  = 0.22kg

Initial velocity  = 20m/s

Distance moved  = 10m

Unknown:

Initial kinetic energy of the rock  = ?

Solution:

To solve this problem, we need to understand that kinetic energy is the energy due to the motion of a body.

It is mathematically expressed as;

     Kinetic energy  = \(\frac{1}{2}\) m v²

m is the mass

v is the velocity

   Kinetic energy  =  \(\frac{1}{2}\) x 0.22 x 20²   = 44J

Answer:

Using the grid, graph, and given data, estimate the distance traveled by the walker during the two hour interval from t= 0 t = 0 to t= 2. t = 2. You should use time intervals of width Δt= 0.5.

Explanation:

Using the grid, graph, and given data, estimate the distance traveled by the walker during the two hour interval from t= 0 t = 0 to t= 2. t = 2. You should use time intervals of width Δt= 0.5.

Answer:

this is the answer the required questions

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Answer:

D

Explanation:

There are no exceptions to these laws under specific stated conditions..

The laws of science are statements that describe or predict a range of phenomena as they appear in nature. Laws explain facts determined by experiment. Laws do not have absolute certainty and be changed by future experiments and observations.

Answer:

there are no exceptions to these laws under specific stated conditions.

Explanation:

There are no exceptions to scientific laws under certain stated conditions. This is the main factor that distinguishes scientific theories from scientific laws.

Both scientific theories and laws are based on extensive observations, experimentation, and reasoning, but scientific theories are subject to change over time as new technology is invented and new evidence emerges.

Answer:

v = -5 m/s

Explanation:

It is given that,

The initial velocity of the ball, u = 25 m/s

We need to find its velocity after 2 seconds in the air.

Let v is the velocity of the ball after 2 seconds. Using equation of motion to find it.

v = u + at

Here, a = -g

v = u -gt

Putting all the values,

v = 25 - (10)(3)

= 25-30

= -5 m/s

So, the velocity of the ball after 3 seconds is 5 m/s and it is in downward direction.

Answer:24 hours

The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.

Explanation:

Answer: 24 hours

The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.

Explanation:

Answer:

Atoms of elements with the same electons in the outer most shell they are put in the same group on the periodic table

Ventifacts are created in the desert environment through the process of abrasion, where wind-blown particles erode and shape rocks over time.

Abrasion occurs when wind-blown particles, such as sand or small rock fragments, are transported by the wind and collide with exposed rock surfaces. Over time, these particles act as natural sandblasting agents, gradually wearing down and shaping the rocks they come into contact with.

As the wind continuously blows particles against the rocks, the impact causes the rocks to undergo attrition, which is the process of wearing away through repeated collisions. The softer and less resistant portions of the rock are gradually eroded, while harder and more resistant parts remain. This differential erosion leads to the development of distinct features on the rock surface.

Ventifacts often exhibit flat surfaces, facets, and polished areas that are aligned with the prevailing wind direction. The abrasive action of wind-blown particles smoothens and polishes the rock, giving it a characteristic appearance. The size and shape of ventifacts can vary, ranging from small pebbles to larger boulders.

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We can use the nebular theory to explain why the planets revolve around the Sun in the same direction, and it is because they inherited the same direction of rotation from the spinning protoplanetary disk during their formation.

The Nebular Theory is a theory about the formation of the Solar System. It proposes that our Solar System formed from a giant cloud of interstellar gas and dust called a nebula. This nebula eventually collapsed due to gravity, and it started to spin. As the nebula spun faster and faster, it flattened out into a disk-like structure called a protoplanetary disk.

Over time, small particles in the disk started to stick together and form larger and larger objects called planetesimals. These planetesimals then collided with each other and merged to form the planets that we see today.

The reason why the planets revolve around the Sun in the same direction is due to the conservation of angular momentum. Angular momentum is a measure of how much an object is rotating or spinning. According to the conservation of angular momentum, the total amount of angular momentum in a system remains constant unless an external torque acts on the system.

In the case of the Solar System, the protoplanetary disk was spinning in a particular direction. As the planets formed from this disk, they inherited the same direction of rotation. This is why all the planets in our Solar System orbit the Sun in the same direction.

Therefore, we can use the nebular theory to explain why the planets revolve around the Sun in the same direction, and it is because they inherited the same direction of rotation from the spinning protoplanetary disk during their formation.

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Answer:

100 m/s

Explanation:

Speed increases at a rate of 10 m/s (actually 9.8 m/s) every second. Thus after 10 seconds, the speed is 10 x 10 = 100 m/s.

Answer:

25N

Explanation:

The force the head of the nail is doing on the hammer is 25N. This is based on the newton's third of law of motion.

It states that "action and reaction are equal but opposite in direction".

A body exerting a force of 25N on another will get a reaction force of an equal but negative magnitude of force in the opposite direction.

Answer:

a phase change occurs when the pressure on the system changes. during pressure change on the system changes the object is going through the phase change of melted then solid, melting, liquid, and then vaporization. sense it is going from a solid state to a melting state. the particles are Freezing: liquid to solid. Melting: solid to liquid. Condensation: gas to liquid. Vaporization: liquid to gas. Sublimation: solid to gas. Deposition: gas to solid. during the a phase change the energy of the particles are The energy that is changing during a phase change is potential energy. During a phase change, the heat added increases or released decreases will allow the molecules to move apart or come together. a phrase change occurs because a phase change is when matter changes to from one state to another example: solid to liquid. another reason why a phase change occurs is because water is a substance that has many interesting properties that influence its phase changes. Most people learn from an early age that water melts from ice to liquid at 0°C, and boils from a liquid to a gas at 100°C  but this isn't true in all circumstances. The pressure affects these transition points, so for water, the boiling point actually decreases as the pressure decreases.

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Have a good day!

-Asher

Answer:

c

Explanation:

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When two charged objects are moved to 2  meters apart from 1 meter. Then, both Gravity and electrostatic forces will be weak.

The electrostatic force and gravity force is inversely proportional to square of distance between two objects.

                      \(F\alpha\frac{1}{r^{2} }\)

Where r is distance between both charged objects.

When two charged objects are moved to 2  meters apart from 1 meter. Then, both Gravity and electrostatic forces will be weak.

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Answer:

this effect is called SCREENING

Explanation:

When a positive charge is surrounded by several negative charges at a long distance, an apparent decrease in the positive charge is observed, this effect is called SCREENING and is noticeable in multielectronic atoms

This effect is responsible for the decrease in ionization energy in the larger atoms.

Answer:

B. The water collects in a low-lying area.

Explanation:

X Mudflow blocking a river can act like a dam, not making any puddles.

X Humans making a dam means the pond can't be formed naturally.

X An ice sheet covers the pond, and if it's connected to any other sheets of ice, it won't be a pond.