How can the creation of ice result in physical weathering? view available hint(s) how can the creation of ice result in physical weathering? ice dissolves the surrounding container. ice scrapes the sides of the container, making it bigger. ice contracts as it forms, allowing a container to collapse. water expands in volume when freezing, exerting pressure on a container. liquid water carries talus into a fracture, which wedges the container open?

Answer:

(a) The temperature increases, the lid expands

Explanation:

Running the lid under hot water will result in the transfer of heat from the water to the lid of the jar.

The heating up of the lid increases its temperature and the average kinetic energy of the molecules of the lid. Hence, the jar lid to expand and becomes easier to open.

The correct option is a.

Answer: The correct options are:

               A note being played on a saxophone

               An opera singer breaking glass with her voice a person pushing

               A swing at the rate it naturally oscillates back and forth

Explanation:

Resonance is a phenomenon which occurs when the applied frequency on the object is equal to its natural frequency.

When resonance occurs the amplitude of the vibrating object becomes large.

In the given options, the examples of the resonance are as follows:

"an opera singer breaking  a glass with her voice a person pushing": Here, the resonance will occur due to which the glass will break. The applied frequency of the voice of a person on the glass matches with the natural frequency of the glass.

"a note being played on a saxophone": Here, the resonance will occur. The sound energy is produced by saxophone. The air is blown through mouthpiece in it. It causes reed to vibrate rapidly against mouthpiece. Then, air moves through it. Then, the sound is amplified until it escapes through open tone holes.

"swing at the rate it naturally oscillates back and forth": when the applied frequency on the swing matches with the natural frequency of swing. The amplitude of the swing will increase. Here, the resonance will occur.

Answer:

B. a note being played on a saxophone

C. an opera singer breaking a glass with her voice

D. a person pushing a swing at the rate it naturally oscillates back and forth

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Explanation:

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Final answer:

The Doppler effect involves changes in frequency due to the relative motion between a wave source and its observer, not changes in the speed of sound.

Explanation:

What occurs with the Doppler effect are changes in frequency due to motion. The Doppler effect is a phenomenon observed with waves, where there is an alteration in the observed frequency of a sound or light due to the relative motion between the source and the observer. It's important to note that the Doppler effect does not involve a change in the speed of sound due to motion, but strictly involves changes in frequency.

The practical applications of the Doppler effect are vast, ranging from medical diagnostics using Doppler-shifted ultrasound to determine blood flow, to astronomy where it helps in the study of the motion of stars and galaxies. Fundamentally, the effect explains how the motion affects the perceived pitch of a sound for an observer; for example, the high pitch of an approaching ambulance siren that lowers as it moves away.

Answer:

Affects the dependent variable.

Explanation:

A dependent variable is defined as the variable which is being tested during an experiment.

The dependent variable is the variable which is always dependent on the independent variable.

As in the experiments if the the value of independent variable then this change in independent variable will change the value of dependent variable.

For example: A scientist is recording the effect of light and dark on the moth by turning it off and on. In this case, the amount of light is independent variable and the moth's reaction is dependent variable. It means a change in the independent variable directly affect the dependent variable

Question 1:

which subatomic particle has a negative charge?

Answer:

Electron

Explanation:

There are three subatomic particles

electron, neutron and proton

out of all electron is negatively charged, proton is positively charged while neutron is a neutral particle

Question 2:

if an atom has 2 protons, 3 neutrons, and 3 electrons, what is the electrical charge of the atom?

Answer:

Negative

Explanation:

As we know that

[tex]Q = (N_p - N_e) e[/tex]

[tex]N_p = 2[/tex]

[tex]N_e = 3[/tex]

[tex]Q = (2- 3)e = -e[/tex]

so it is negatively charged

Question 3:

A neutral atom that gains electrons will have what kind of charge?

Answer:

Negative

Explanation:

Since electron is a negatively charged particle so on gaining an electron it will get negative charge

Question 4:

which of the following describes the principle of the conservation of charge?

Answer:

Charge cannot be created or destroyed, just transferred

Explanation:

charge can transfer from one atom to other atom but we can not create a charge  or we can not destroy a charge

Question 5:

what law states that when there is an interaction between charged objects there is a non-contact force which acts over some distance of seperation?

Answer:

Coulomb's law

Explanation:

Coulombs law gives the force of attraction or repulsion between two charges which is given as

[tex]F = \frac{kq_1q_2}{r^2}[/tex]

Question 6:

which of the following describes an insulator?

Answer:

Does not allow electrons to move through it

Explanation:

in insulators all the charges are bounded and not free to move

Question 7:

what are most conductors made of?

Answer:

Metal

Explanation:

All conductors are source of free electrons in which they can move freely

Question 8:

which of the following describes why lightening rods are put on top of houses?

Answer:

conduct the lightening away from the house

Explanation:

lightening rod gives the path to excess charge to flow towards ground

Question 9:

your computer is powered by which of the following?

Answer:

Electrical current

Explanation:

All electrical device is powered by current source

Question 10:

wire is used to attach a battery to a penny and is then used to light a small light bulb. the light bulb is lit due to which of the following?

Answer:

electric current

Explanation:

electric current gives energy to glow the bulb

Answer: Option (C) is the correct answer.

Explanation:

A compound that is formed by transfer of electrons results in the formation of an ionic bond and it is known as an ionic compound.

For example, calcium has 2 valence electrons and bromine has 7 valence electrons. So, in order to complete their octet calcium donates its two valence electrons to two bromine atoms.

Therefore, it results in the formation of an ionic compound [tex]CaBr_{2}[/tex].

In an ionic compound there is partial positive charge on the cation and partial negative charge on the anion.

Whereas a compound formed by sharing of electrons is known as a covalent compound.

For example, [tex]CF_{4}[/tex], [tex]NH_{3}[/tex] and [tex]CO_{2}[/tex] are all covalent compounds.

Thus, we can conclude that [tex]CaBr_{2}[/tex] is the compound that is held together by the electrostatic force between two ions.

One can be able to determine the metal cylinders based on the time taken to unwrap them.

From the information given, there are two identical-looking metal cylinders and a long rope and the cylinders have the same size, shape, and weight.

One can be able to differentiate then by using only the rope and the two cylinders by wrapping the rope around the cylinder. The hollow cylinder will take longer to wrap when compared to the solid one.

Read related link on:

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Odd-shaped ceilings, decorative panels, draperies, and glass windows reduce echoes and noises.

An echo is a sound that is caused because of the reflection of sound.

In order to avoid echoes, we must avoid creating surfaces where the sound waves can be focused.

Now, as we know the reason why echoes are formed and how can they be avoided, therefore,

Making odd-shaped ceilings and decorative panels reduces the surfaces where the sound waves can be focused. While putting draperies and glass windows will absorb the sounds, As glass absorbs the sound waves and convert the energy into vibration energy.

Hence, odd-shaped ceilings, decorative panels, draperies, and glass windows reduce echoes and noises.

Learn more about Echo:

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Answer:Relative abundance.

Explanation:

Relative abundance is the percentage of a particular isotope that occur in nature.

... Speeding up or slowing down are two of the three forms of acceleration.

... The SLOPE of the line on a distance/time graph is the object's speed.

... If the graph is curved, then its slope is changing.

That means the object's speed is changing.

That means the object is accelerating.

Final answer:

A curve on a distance-time graph indicates acceleration because the slope of the graph reflects velocity, which changes when acceleration is present. A straight line represents constant velocity with no acceleration, while a changing slope means varying velocity, indicating acceleration.

Explanation:

On a distance-time graph, a curve indicates acceleration because the slope of the graph represents velocity, which is distance divided by time. When velocity changes, it means there is an acceleration present. If the graph is a straight line, the slope is constant, and the velocity is uniform, hence, no acceleration. When the slope (or the 'steepness' of the curve) changes, it indicates a changing velocity. A steeper slope means an increase in velocity, indicative of positive acceleration, while a slope that becomes less steep suggests a slowing down, or negative acceleration.

Accurate depiction of acceleration in physics requires consideration of the shape of the curve on a position vs. time graph. A parabolic curve suggests constant acceleration, while a hyperbola might represent acceleration defined in specific intervals. The 'cup' of the curve pointing up or down indicates the direction of acceleration. It's important to understand that while a velocity-time graph can show instantaneous acceleration as the slope of the tangent line, the position-time graph's relationship to acceleration is more indirect and is reflected in the curvature of the graph.

Answer:

A) Low Energy

Explanation:

Red colour light is light with larger wavelength due to which it can travel large distance. Due to this property of red colour light we use this colour to show different signals so that they are visible from distance

Here we also know by the formula of energy

[tex]E = \frac{hc}{\lambda}[/tex]

here we can see that the wavelength of light and energy of light is inversely depends on each other

So here we can say that red colour light is of larger wavelength and smaller energy due to which it can travel larger distance

so correct answer is

A) Low Energy

Answer:the number of protons

Answer:

the car is moving clockwise at 30 m/s

Explanation:

For an object moving in circular motion:

- The velocity is always tangential to the circle

- The acceleration (centripetal acceleration) is towards the centre of the circle, so perpendicular to the velocity)

In this case, the velocity is directed due east, while the acceleration is directed due south: so the car is "curved towards south while moving", this means that the car is travelling clockwise.

Moreover, the centripetal acceleration is given by:

[tex]a=\frac{v^2}{r}[/tex]

where

a = 3 m/s^2 is the acceleration

v is the speed

r = 300 m is the radius of the track

Solving for v,

[tex]v=\sqrt{ar}=\sqrt{(3 m/s^2)(300 m)}=30 m/s[/tex]

So the answer is

the car is moving clockwise at 30 m/s

In a clockwise circular motion, when a car's velocity is east, its inward or centripetal acceleration is due south. Circular motion rules dictate this because acceleration is towards the centre. However, the car's speed can't be deduced from this data.

The student's question pertains to the concept of circular motion dynamics, which is a topic in physics. The key is understanding that a car moving in circular motion always has an acceleration directed towards the center of the path, also known as centripetal acceleration. The direction of velocity, which is tangential to the path, continually changes due to this inward acceleration.

If we consider a car moving clockwise around a circular track when viewed from above - the east would be on its right and south would be below. In this scenario, when the car's velocity is directed due east, the centripetal acceleration (due to the car's need to change direction to stay on the circular path) will be facing due south.

Regarding the speed of the car, it can be moving either clockwise or counterclockwise at either 10 m/s or 30 m/s. However, this information cannot be determined from the acceleration data as there is no measure of the car's tangential acceleration, which is the acceleration that affects the car's speed.

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Answer:

b) The potential energy is at a maximum.

Explanation:

It happens because the equation for the potencial energy is a function of the height of the body (Epotential=mgh) and, when you reach the top of your jump, you obviously reach your maximum height.

Final answer:

The potential energy is at its maximum at the top of the jump on a trampoline, with kinetic energy being zero and mechanical energy equating to the potential energy. The correct option is b) The potential energy is at a maximum

Explanation:

The correct answer to the question is that at the top of your jump on a trampoline, the potential energy is at its maximum (b). This is because when you are at the peak of your jump, you have the maximum height above the ground, where the gravitational potential energy is highest when assuming gravitational force is the only significant force in play (air resistance being negligible).

Kinetic energy is zero at this point because you are momentarily stationary at the top of the jump before descending back down. The mechanical energy of the system is not zero, however, as it is the sum of kinetic and potential energy and therefore will equal the potential energy at the top of the jump.