A box sitting still on the ground by itself has a Normal Force of 700N, what is the mass? (gravity’s acceleration is 9.80 m/s²)

The right response is "The ice absorbs energy which causes chemical bonds to break, changing ice to water".

The binding power that binds two or more atoms in a molecule together is known as a chemical bond. To create a more stable and low-energy state, atoms share, transfer, or exchange electrons to establish these bonds.

It takes energy to overcome the intermolecular interactions of binding particles together when a material transforms from a solid to a liquid. The energy required for ice melting comes from the environment. This implies that ice melts by absorbing energy.

The water molecules in the ice get extra kinetic and potential energy as a result of the energy absorbed during the melting process. The intermolecular interactions keeping the particles in a solid structure gradually dissipate as they travel faster and become more disordered. This causes a liquid with more freedom of movement to develop.

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Answer:

Composition. The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic radiation (estimated to constitute from 0.005% to close to 0.01% of the total mass-energy of the universe) and antimatter.

Explanation:

your answer

Answer:

0.28m/s²

Explanation:

Force = mass•acceleration

F = m•a

50 = 176•a Divide both sides by 176:

50/176 = a ≈ 0.28 m/s²

Answer:

Lightning strikes help dissolve this unusable nitrogen in water, which then creates a natural fertilizer that plants can absorb through their roots. Lightning also produces ozone, a vital gas in our atmosphere that helps shield the planet from rays of harmful ultraviolet sunlight.

Explanation:

Answer:

WHEN LIGHTNING STRUCKS VOLCANIC SAND IT TURNS TO DIAMOND HUMANS CAN USE THESE DIAMOND'STO BARGAN

Answer: B: The car is speeding up in the same direction as it is traveling.

Explanation:

I took the test and got it right

The energy of the photon emitted during the transition is 33.6 eV.

When a photoelectron is emitted from the K shell of an atom with atomic number 24, an electron in the M shell moves down to fill the vacancy in the K shell. To determine the energy of the photon emitted during this transition, we can use the equation

ΔE=(Z−σ)2(nr21​−n121​)E0​

where Z is the atomic number, σ is the screening constant, nr1 is the principal quantum number of the initial state, and n12 is the principal quantum number of the final state.

In this case, Z=24 and σ=1, since the transition is to the K shell. The initial state is characterized by nr1=2 (for the K shell) and n12=3 (for the M shell). Substituting these values into the equation, we get ΔE=(24−1)2(22−32)E0​=(23)2(−1)E0​=(-529)eV=(-33.6)eV.

Therefore, the energy of the photon emitted during this transition is 33.6 eV.

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Given that a point on the sixth nodal line from the center is 24.0 cm from one source and 43.2 cm from the other source and the sources are separated by 18.5 cm.

To find the wavelength of the waves produced by the sources we can use the formula,d = nλ/2 Where, d is the distance between the sources, λ is the wavelength of the waves produced and n is an integer representing the number of nodal lines between the sources and the point.

The distance between the sources is given as 18.5 cm.

And the number of nodal lines between the sources and the point is 6.

So we can write,d = 6λ/2 or d = 3λor λ = d/3.

Substituting the value of d, we get,λ = 18.5/3= 6.17 cm.

Therefore, the wavelength of the waves produced by the sources is 6.17 cm.

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because the top part become weaker

Explanation:

Unfortunately, all trees have some potential to fail during heavy winds or other harsh elements, such as snow and ice. ... In these incidences, the tree trunk acts as a lever and the force applied to the roots and trunk increases with height and mass. Taller trees are more susceptible to windthrow.

"Windthrow" is a phenomenon that uproots a tree because the trunk acts as a lever applying force to the roots. ... Trees are more likely to uproot during strong winds especially if the tree is top-heavy which can also result in tearing, splitting and limb breakage

Answer:

Explanation:

Using Kirchhoff's laws, we can solve for the current i:

At the node where the 2Ω and 4Ω resistors meet, the current is split into two branches, i and i1. Applying Kirchhoff's current law (KCL), we have:

i + i1 = 12/2 = 6 A

At the loop with the 2Ω, 4Ω, and 5Ω resistors, applying Kirchhoff's voltage law (KVL), we have:

-20 + 2i + 4i1 + 5i1 = 0

-20 + 6i1 + 2i = 0

6i1 + 2i = 20

3i1 + i = 10

We can solve this system of equations by substitution, which gives:

i = 2 A

Therefore, the current through the 2Ω resistor is 2 A. The answer is (A) 2 A.

Answer:

the statement is TRUE

Explanation:

Most lenses are made of glass that has a strong absorption below 400 nm,

Only special evaporation lenses are made of quartz and fused silica which has a high absorption below 200 nm.

therefore the statement is TRUE

The angular momentum of a 265 kg motorcycle traveling at 25 m/s around a circular curve with a radius of 500 m is \(3,312,500 \;kg.m^2/s.\)

To calculate the angular momentum of the motorcycle, we need to first find its angular velocity. Since the motorcycle is traveling around a circular curve, we can use the formula:

\(v = r\omega\)

where v is the velocity of the motorcycle, r is the radius of the curve, and ω is the angular velocity.

Rearranging this formula to solve for ω, we get:

\(\omega = v/r\)

Substituting the values given, we get:

\(\omega = 25 \;m/s \;/ \;500 m = 0.05 \;rad/s\)

Next, we can use the formula for angular momentum:

\(L = I\omega\)

where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.

For a point mass moving in a circular path, the moment of inertia is simply mr², where m is the mass of the motorcycle and r is the radius of the curve.

Substituting the values given, we get:

\(L = (265 \;kg)(500 \;m)^2(0.05 \;rad/s)\)

\(L = 3,312,500 \;kg.m^2/s\)

Therefore, the angular momentum of the motorcycle is \(3,312,500 \;kg.m^2/s.\)

In summary, the angular momentum of a 265 kg motorcycle traveling at 25 m/s around a circular curve with a radius of 500 m is \(3,312,500 \;kg.m^2/s.\)

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The sound wave took 1.2 seconds to travel from one whale to the other.

Velocity is a physical quantity that describes the rate of change of an object's position with respect to time and includes both the speed and direction of motion. It is a vector quantity, meaning it has both magnitude and direction and is typically measured in meters per second (m/s) or other appropriate units.

The time it took for the sound wave to travel from one whale to the other can be calculated using the formula:

time = distance/velocity

In this case, the distance between the whales is 1,800 meters and the velocity of sound in water is 1,500 meters per second. Therefore:

time = 1,800 meters / 1,500 meters per second

time = 1.2 seconds

Hence, The distance between the two whales was covered by the sound wave in 1.2 seconds.

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Answer:

the time taken for the box to stop is 3.6 s.

Explanation:

Given;

initial speed with which the box was pushed, u = 5 m/s

time taken for the box to stop, t = 1.5 s

Assuming the box is moving at constant acceleration, a;

\(a = \frac{u}{t} \\\\a = \frac{5}{1.5} \\\\a = 3.33 \ m/s\)

When the box is pushed a speed of 12 m/s, the time taken for the box to stop is calculated as;

\(t = \frac{v}{a} \\\\t = \frac{12}{3.33} \\\\t = 3.6 \ s\)

Therefore, the time taken for the box to stop is 3.6 s.

Answer:

Brightness.

Explanation:

very bright.

Light energy with very high amplitude would be perceived as very bright or intense light.

Waves with a big maximum displacement or height relate to light energy with a very high amplitude.

This large amplitude equates to a greater intensity or brightness of light in terms of perception.

When high-amplitude light waves enter our eyes, they excite light-sensitive cells, such as the cones in our retinas, more powerfully.

As a result of the increased stimulation, the sense of a bright or powerful light source is formed. The magnitude of the light's amplitude is interpreted by the human visual system as a measure of its intensity, allowing humans to distinguish between dimmer and brighter light sources.

Thus, in human visual experience, light energy with a very high amplitude is related with a heightened feeling of brightness or intensity.

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The actual connecting or transmission medium that carries the message in a communication system is called the communication channel.

The channel is responsible for conveying information from the sender (source) to the receiver (destination) effectively and accurately. These channels can be either wired or wireless, depending on the type of communication system being used.

Examples of communication channels include:

1. Copper wires: Commonly used in traditional telephone systems and Ethernet cables.
2. Fiber-optic cables: Offer high-speed data transmission and are used for internet connections, television signals, and more.
3. Radio waves: Enable wireless communication for devices like mobile phones, radios, and Wi-Fi routers.
4. Infrared: Used for short-range communication, such as remote controls and wireless keyboards.
5. Satellite: Allows for global communication and data transmission, especially in remote areas.

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Answer:

C - Branden believes that he is not okay unless he is perfect.

Explanation:

sorry im late but good luck <3

Answer:

c

Explanation:

The skateboarder needs to regularly push with their foot when skateboarding along a level surface because of the presence of frictional forces that oppose motion. When the skateboarder gives themselves a push, they increase their forward velocity.

The skateboarder needs to regularly push with their foot when skateboarding along a level surface because of the presence of frictional forces that oppose motion. When the skateboarder gives themselves a push, they increase their forward velocity. However, over time, the velocity decreases due to the force of friction between the skateboard's wheels and the ground, which acts in the opposite direction to the skateboard's motion. During a push, the skateboarder exerts a force on the skateboard that propels it forward. Between pushes, the skateboard moves at a constant velocity due to the balanced forces acting upon it. However, as frictional forces act on the skateboard, it slows down until the next push is required. The net force acting on the skateboarder is unbalanced, as the force of friction acting against the skateboard's motion is greater than the force of the skateboarder's push. The resulting net force causes the skateboarder to slow down over time. Thus, by pushing themselves, the skateboarder overcomes the force of friction and maintains their forward motion.

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Answer:

As of right now the techology has not been invented to time travel

if we were to time travel to the future from where that person travled from would be the past and to them the people from where they came from are living in the past

Explanation:

Answer: The heat capacity and the specific heat are related by C=cm or c=C/m. The mass m, specific heat c, change in temperature ΔT, and heat added (or subtracted) Q are related by the equation: Q=mcΔT. Values of specific heat are dependent on the properties and phase of a given substance.

Explanation:

Answer:

Here Is An OverView of What I Know About Science:

To understand what science is, just look around you. What do you see? Perhaps, your hand on the mouse, a computer screen, papers, ballpoint pens, the family cat, the sun shining through the window …. Science is, in one sense, our knowledge of all that — all the stuff that is in the universe: from the tiniest subatomic particles in a single atom of the metal in your computer's circuits, to the nuclear reactions that formed the immense ball of gas that is our sun, to the complex chemical interactions and electrical fluctuations within your own body that allow you to read and understand these words. But just as importantly, science is also a reliable process by which we learn about all that stuff in the universe. However, science is different from many other ways of learning because of the way it is done. Science relies on testing ideas with evidence gathered from the natural world. This website will help you learn more about science as a process of learning about the natural world and access the parts of science that affect your life.

Explanation:

Science helps satisfy the natural curiosity with which we are all born: why is the sky blue, how did the leopard get its spots, what is a solar eclipse? With science, we can answer such questions without resorting to magical explanations. And science can lead to technological advances, as well as helping us learn about enormously important and useful topics, such as our health, the environment, and natural hazards. Without science, the modern world would not be modern at all, and we still have much to learn. Millions of scientists all over the world are working to solve different parts of the puzzle of how the universe works, peering into its nooks and crannies, deploying their microscopes, telescopes, and other tools to unravel its secrets. I Hope This Helps.

Answer:

Explanation

Give the initial velocity of am object as v =(4m/s)xi+(3m/s)yj

From the expression;

Vy = 3m/s

Vx = 4m/s

At the maximum height, the velocity of the body is zero i.e Vy = 0m/s

The velocity of the projectile as it reaches its highest point will be:

v = (4m/s)xi + 0

v = √4²+0²

v = √16

v = 4m/s

Hence he velocity of the projectile when it reaches its highest point is 4m/s

Answer:

True

Explanation:

Pre-questioning may help a reader focus on information s/he hopes to find in the reading selection.

Answer:

True!!

Explanation:

I took the practice thing on edge :))

A flywheel accelerates angularly at 11 rev/min2, reaching 45 revolutions per minute in about 4.10 seconds after being turned on. In physics, "angular acceleration" refers to the speed.

Changes in angular velocity. Since spin angular velocity and orbital angular velocity are two different forms of angular velocity, respectively, there are two different types of angular acceleration. Spin angular acceleration and orbital angular acceleration are the names for these. Because there is no directional component, speed must be a scalar variable. The average speed in physics can be calculated by dividing the total distance travelled by the total amount of time.

Initial angular acceleration = 0 rev/min

Final angular acceleration = 42 rev/sec 45 = + alpha *4.10 alpha = 45/4.10 = 11 rev/min

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Answer:0.563

Explanation:

The kinetic energy produced in a toy car is equal to 0.563 J.

The energy exhibited by a moving body because of its motion is said to be its kinetic energy. Work should be done which can change the kinetic energy of a moving object.

The kinetic energy of a moving object can be determined from the formula mentioned below:

K.E. = ½mv²     where ‘m’ and ‘v’ is the mass, velocity of the object.

Potential Energy (P.E.)is energy that is stored in an object due to its position and can be expressed as P.E = mgh where h, m, and g are the height, mass, and gravitational acceleration respectively.

Given, the mass of the toy car =, m = 0.500 Kg

The velocity of the toy car, v = 80 m/s

The kinetic energy = (1/2)× 0.500 ×(1.50)²

K.E. = 0.563 J

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Electric field strength decreases as the distance from the source increases.

The strength of an electric field is inversely related to square of the distance from the source. This means that the electric field strength decreases when the distance from the source increases.

So we can conclude that Electric field strength decreases as the distance from the source increases.

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Answer:

A is the answer

Explanation:

come on man

D. 1 N = 1 kg-m/s²

Explanation

Force can be defined as the push or pull on an object with mass that causes it to change its velocity, for example the force of gravity , this force pushes us to the cneter of the earth,

so

SI( international system of units) is the metric system that is used universally as a standard for measurements, the units for mass and acceleration are

therefore, the units of force would be

by definition

therefore, the answer is

D. 1 N = 1 kg-m/s²

I hope this helps you

The wavelengths in air is 8.8x10^-6 m for sounds in the maximum range of human hearing.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

The following equation can be used to compute wavelength: wavelength = wave velocity/frequency. In most cases, wavelength is measured in metres. Greek letter lambda is used to represent wavelength, so = v/f.

speed = wavelength x frequency or wavelength = speed / freq

for f = 20Hz, wavelength = 343m/s / 2.0 x 10^1 Hz = 17.2m

for f = 20,000 Hz, wavelength = 343m/s / 20,000Hz = 0.017 m

39MHz = 39x10^6 Hz so wavelength = 343m/s / 39x10^Hz = 8.8x10^-6 m

Hence, the wavelengths in air is 8.8x10^-6 m

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