transparent materials allow electromagnetic waves to be while trapping thermal energy

1. transmitted
2. reflected
3. absorbed

The average force the air exerted on the box as it fell is approximately 23.2N.

The formula is F = 0.5*Cd*p*A*v², where F is the force of air resistance, Cd is the drag coefficient of the object, p is the density of air, A is the cross-sectional area of the object, and v is the velocity of the object.

In this case, we can assume that the box is a simple rectangular shape with a cross-sectional area of 0.1m² and a drag coefficient of 1.0 (a conservative estimate for a box-shaped object). We also know that the density of air is approximately 1.2kg/m³.

Using the formula, we can calculate the force of air resistance on the box when it reaches its maximum velocity, which is likely close to the end of its fall. The maximum velocity can be estimated using the equation v² = u² + 2as, where u is the initial velocity (0), a is the acceleration due to gravity (9.8m/s²), and s is the distance fallen (20m). Solving for v, we get v = 19.8m/s.

Plugging in these values, we get:
F = 0.5*1.0*1.2*0.1*19.8²
F = 23.2N

Therefore, the average force the air exerted on the box as it fell is approximately 23.2N.

To know more about average force, refer

https://brainly.com/question/18652903

#SPJ11

Answer:

As the temperature increases, the volume of the material also increases. This is known as thermal expansion. It can also be explained as the fractional change in the length or volume per unit change in the temperature.

The relation between alpha, beta, and gamma is given in the form of a ratio and the ratio is 1:2:3 and can be expressed as:

alpha=fracbeta2=fracgamma3

Following is the relation between the three:

L = L (1 + α.ΔT)

Where, α is the coefficient of linear expansion  

A = A (1 + β.ΔT)

Where, β is the coefficient of aerial expansion

V = V (1 + γ.ΔT)

Where, γ is the coefficient of cubical expansion  

V = V + γV.ΔT

V = V (1 + γ.ΔT)  

L3 = L3 (1 + α.ΔT)3

L3 = L3 (1 + 3α.ΔT + 3α2.ΔT2 + α3.ΔT3)

L3 = L3 (1 + 3α.ΔT)

Alpha, beta, and gamma are related to one another in the form of a ratio, and that ratio is 1:2:3, and yes they are universal constants.

A substance's volume expands while its mass stays constant. Heating is typically the cause of expansion. When a substance is heated, the molecular bonds separating its particles weaken, the particles move more quickly, and the substance expands as a result.

Determine the relation as shown below,

L = L (1 + α × Δ T)

here, α is the coefficient of linear expansion  

A = A (1 + β × Δ T)

here, β is the coefficient of aerial expansion

V = V (1 + γ × Δ T)

here, γ is the coefficient of cubical expansion  

V = V + γ × V × Δ T

V = V (1 + γ × ΔT)  

L3 = L3 (1 + α × Δ T)3

L3 = L3 (1 + 3α × ΔT + 3α2 × ΔT2 + α3 × ΔT3)

L3 = L3 (1 + 3α × Δ T)

To know more about expansion:

https://brainly.com/question/28942019

#SPJ2

One key reason why gravitational waves are more challenging to detect than electromagnetic (EM) waves is their extremely weak interaction with matter.

Gravitational waves arise from the acceleration or movement of massive objects, causing ripples in the fabric of spacetime. However, these waves interact with matter so weakly that their effects are incredibly small.In contrast, electromagnetic waves interact with matter through electric and magnetic fields, allowing for more substantial interactions and easier detection. EM waves can be absorbed, reflected, or refracted by various materials, making them readily detectable with appropriate instruments.

Gravitational waves, on the other hand, interact so weakly that they can pass through matter almost unaffected. They only cause a minuscule stretching and compressing effect on the objects they encounter. This weakness of interaction poses significant challenges in detecting gravitational waves because the signals they produce are incredibly faint and require extremely sensitive detectors, such as interferometers like LIGO (Laser Interferometer Gravitational-Wave Observatory), to capture the minute changes in spacetime geometry.

Therefore, the weak interaction of gravitational waves with matter is a key reason why they are much harder to detect compared to electromagnetic waves.

Learn more about electromagnetic here

https://brainly.com/question/24319848

#SPJ11

The right end of the conductor will be positive.

What is charging by conduction ?

The charging by induction process is where the charged particle is held near an uncharged conductive material that is grounded on a neutrally charged material. The charge flows between two objects and the uncharged conductive material develop a charge with opposite polarity.

When an uncharged object is placed very close to a charged conductor without touching, the nearer end acquires a charge opposite to the charge on the charged conductors and the two bodies attract. This is called charging by induction. The net charge on the bodies remains the same and body is charged until they are kept close or brought in contact.  

To learn more about Induction click on the link below:

https://brainly.com/question/26366866

#SPJ4

First, find the weight of the object.

W = m g = 900 x 9.8 = 8,820 N

T2x = -t2 cos 20

t1 x = t1cos 40

mgx= 0

T2y= t2 sin 20

t1y= t1 sin 40

mgy= - mg

X and y components of resultant (R)

Rx = t1x -t2x + mgx

Rx= -t2 cos 20 + t1cos 40 (3)

Ry = t2 sin 20 + t1 sin 40 - mg(2)

Rx, and Ry = 0

0 = -t2 cos 20 + t1cos 40 (3)

0= t2 sin 20 + t1 sin 40 - mg (4)

Solve (3)

0 = -t2 cos 20 + t1cos 40

t2 cos 20 = t1 cos 40

t2 = t1 cos40/cos20

t2 = 0.815 t1

Substitute t2 in 4

0 = t2 sin 20 + t1 sin 40 - mg

0 = (0.815 t1) sin 20 + t1 sin 40 - 8,820

0= t1 ( 0.815 sin 20 + sin 40 ) -8820

0 = 0.921 t1 -8820

8820 = .921 t1

t1 = 8820/0.921

t1= 9570.261N (option D)

Multiple point perspective is a system of perspective in which: A. there are a number of vanishing points, usually created by multiple objects.

Multiple point perspective can be defined as a system of perspective in which each items (objects) has a number of interacting lines with different vanishing points.

This ultimately implies that, a multiple point perspective is a system of perspective which is created with a number of vanishing points, that are usually created by multiple objects.

Read more on multiple point perspective here: https://brainly.com/question/5398474

#SPJ4

Answer:

A

Explanation:

1) The direction it points depends on the direction of the electric current in the wires.

2) The magnetic field lines in the region would form circles around each individual wire carrying current.

3) This is because of the right-hand rule

The magnetic field produced by the electric current forms a circular magnetic field around the wire in accordance with the right-hand rule, which is applicable to conventional current flow.

The current's flow direction determines the direction of the magnetic field lines. The curled fingers of your right hand, which is holding the wire with your thumb pointing in the direction of the current flow, would point in the direction of the magnetic field.

Learn more about current:https://brainly.com/question/31686728

#SPJ1

The spiral arms in spiral galaxies contain primarily the hottest, newest stars. These stars are formed from the gravitational collapse of gas and dust clouds within the galaxy.

The spiral arms are the locations where the density of gas and dust is highest, leading to an increased rate of star formation. As these stars age and exhaust their fuel, they eventually explode in supernova events, enriching the surrounding gas and dust with heavy elements that will eventually form new generations of stars.

While there may be some older stars within the spiral arms, they are generally located closer to the center of the galaxy where the density of stars is highest. These older stars are typically not as hot as the newer stars found in the spiral arms. The coldest stars, such as red dwarfs, are generally located in the outer regions of the galaxy and are not typically found in the spiral arms.

In short, the spiral arms of spiral galaxies contain primarily the hottest, newest stars, which are formed from the dense gas and dust clouds found within these regions. So, the answer is A) the hottest, newest stars.

Learn more about gravitational collapse here:-

https://brainly.com/question/29370538

#SPJ11

Answer:

1000 units for breakeven

Explanation:

Let x be the number of units sold at breakeven.

The total sales at the point would be $2x.

Variable costs would be $1x and fixed costs are $1000.

Total costs are = $1x + $1000

At breakeven: Sales = Costs

Sales =m Costs

$2x = $1x + $1000

$1x = $1000

x = 1000 units.

At 1000 units the sales are equal to the costs ("breakeven").

The individual effect of salinity reduced organism performance in 43% of the observations, including decreased survival and growth, increased osmolyte content in bodily fluids, altered metabolic rates, etc.

To learn more about aquatic ecosystem with a different salinity refer to:

https://brainly.com/question/1563358

#SPJ1

Answer:

here's the answers!

Explanation:

A mover carries a box up a flight of stairs.

A mover carries a box across a room.

A weightlifter lifts a barbell off the ground.

hope it helps u!

Answer:

A, D, E

Explanation:

Did it

a. Work done = 2. 0648 Joules

b. Electrical potential, V = 4. 03 × 10^10 volts

a. Work done = force × distance

Force = density × acceleration due to gravity

Force = 5. 80 × 10

Force = 58 Newton

We have that distance = 3. 56cm = 0. 0356 m

Work done = 58 × 0. 0356

Work done = 2. 0648 Joules

b. The formula for electric potential is given thus,

Electric potential, V = \(k\frac{q}{r}\)

r = 0. 0356m

k = Coulomb's constant = \(8.98*10^9\)kg⋅m3⋅s−4⋅A−2.

q= 1.60x10^-¹C

substitute into the formula

Electric potential, V = \(8. 98\) × \(10^9\) × \(\frac{1. 6 * 10^-^-1}{0. 0356}\)

Electric potential, V = \(8. 98 * 10^9\) × \(4. 494\)

Electric potential, V = \(4. 03 * 10^1^0\) volts

Learn more about electric potential here:

https://brainly.com/question/14812976

#SPJ1

Answer:

t = 2.94 seconds

Explanation:

Given that,

The initial velocity of the football, u = 0

The final velocity of the football, u = 25 m/s

Acceleration, a = 8.5 m/s²

We need to find the time for which the football is accelerating. Let the time is t. We know that,

\(a=\dfrac{v-u}{t}\\\\t=\dfrac{v-u}{a}\\\\t=\dfrac{25-0}{8.5}\\\\t=2.94\ s\)

So, the football is accelerating for 2.94 seconds.

Answer:

45

Explanation:

because

The magnitude of the force that the baseball exerts on the bat is 500 N.

The given parameters;

According to Newton's third law of motion, action and reaction are equal and opposite. That is, when an object A exerts a certain force on another object B, the reaction of object B is equal to the magnitude of the force exerted by object A but in opposite direction.

Let the force the baseball exerts on the bat = F₂

then, from Newton's third law, we will have the following;

F₁ = -F₂

500 = -F₂

-500 N = F₂ (500 N is magnitude while the negative sign is the direction)

Thus, the magnitude of the force that the baseball exerts on the bat is 500 N.

Learn more here:https://brainly.com/question/23772134

Answer:

35%

Explanation:

Answer:

its 83

Explanation:

The natural length of the spring is approximately 3.67 meters, rounded to the nearest hundredth.

Using the given information, we can apply Hooke's Law, which states that the force required to stretch or compress a spring is proportional to the displacement from its natural length. Mathematically, this is represented as:

F = k * x

where F is the force applied, k is the spring constant, and x is the displacement from the natural length.

Let L be the natural length of the spring. When the spring is stretched from 4m to 5m, the displacement is 5 - L, and the work done is 4J. Similarly, when the spring is stretched from 5m to 9m, the displacement is 9 - L, and the work done is an additional 4J.

Using the work-energy theorem, the work done on the spring is equal to the change in potential energy, which can be represented as:

W = (1/2) * k * (x2^2 - x1^2)

We can set up two equations based on the given information:

4 = (1/2) * k * ((5 - L)^2 - (4 - L)^2)
4 = (1/2) * k * ((9 - L)^2 - (5 - L)^2)

We can solve these equations simultaneously to find the spring constant, k, and the natural length, L. Upon solving, we get:

L ≈ 3.67 meters

To know more about spring constant visit:-

https://brainly.com/question/29975736

#spj11

Yes, (-)menthol and (+) menthol will have an α of the different magnitudes

What is menthol?

Menthol is an organic compound, more specifically a monoterpenoid, synthesized or extracted from the oil of field mint, peppermint, or other mints.It is a waxy, clear or white, crystalline substance that is solid at room temperature, Melt slightly on top.

The major natural form of menthol is (-)-menthol, which is assigned the (1R,2S,5R) configuration. Menthol has local anesthetic and anti-irritant properties and is commonly used to soothe minor irritations in the throat. Menthol also acts as a weak kappa opioid receptor agonist. The (+) and (-) enantiomers of menthol are the most stable of these due to their cyclohexane conformation. All three bulky groups can be placed at the equator if the ring itself is in the chair conformation.

Yes, (-)menthol and (+) menthol will have an α of the different magnitudes

To know more about menthol, visit:

https://brainly.com/question/10983634

#SPJ4

The genetic and chemical variety of plant populations is influenced by environmental factors such as soil nutrients, temperature, water availability, and light intensity.

Sometimes a gene's DNA sequence or degree of activity is altered by the environment. Both of these effects have the capacity to change the proteins that a gene generates, which then affects traits. Some harmful environmental factors can change the nucleotide sequence of a gene. UV rays, for example, can harm DNA strands.

Successful competitors have a higher chance of surviving. Individual creatures with specific qualities are more likely to survive under specific environmental conditions than those without these traits.

To know more about natural selection visit:-

https://brainly.com/question/9830102

#SPJ4

We will have the following:

From the graph and the direction of the focus of the electric field assuming it is a negative electric field will be:

*Net torque: Clockwise.

*Net force: Zero.

If someone is a "weekend warrior," meaning they only participate in physical activity on the weekends, there are a few things a trainer could do to help them stay safe and get the most out of their workouts:

1. Be their coach: A trainer can act as a coach, guiding the individual through their workouts and helping them to improve their form and technique. They can also help the individual set realistic goals and create a training plan that takes into account their limited time for physical activity.

2. Include exercises that mimic the activity: To help the individual prepare for their chosen activity, the trainer can include exercises that mimic the specific movements involved in that activity. For example, if the individual enjoys playing tennis on the weekends, the trainer could include exercises that focus on improving their agility, footwork, and upper body strength.

3. Emphasize safety: It is important for the trainer to emphasize safety, especially if the individual is only participating in physical activity on the weekends. They can help the individual warm up properly before their workouts, use appropriate equipment, and avoid overexertion or pushing themselves too hard.

4. Modify the program: If the trainer determines that the individual's chosen activity is not safe for them due to pre-existing health conditions or injuries, they can modify the program to include other activities that are safer for the individual.

Therefore, a trainer can be a valuable resource for weekend warriors, helping them to stay safe, improve their performance, and achieve their fitness goals.

To learn more about healthy choices click:

https://brainly.com/question/30867423

#SPJ1

The goal of the lab is to investigate the relationship between density and buoyancy. The lab aims to determine how different objects or substances behave in fluids and understand the principles of density and buoyancy through experimental observations and calculations.

The goal of the lab or the question being addressed in the lab report is to investigate and understand the concepts of density and buoyancy. Density refers to the measure of how much mass is contained within a given volume, while buoyancy refers to the upward force exerted on an object submerged in a fluid, such as water or air.

The lab report aims to explore the relationship between density, mass, and volume by conducting experiments and analyzing data. It may involve measurements of different objects or substances, determining their masses and volumes, and calculating their densities. The report may also involve experiments related to buoyancy, such as determining the buoyant force on an object and investigating factors affecting buoyancy.

By conducting the lab and analyzing the obtained results, the lab report aims to provide a deeper understanding of these fundamental concepts in physics and to demonstrate the principles of density and buoyancy through practical experimentation. The report may also include discussions of the significance and applications of density and buoyancy in various fields, such as engineering, architecture, and fluid dynamics.

know more about density here:

https://brainly.com/question/1978192

#SPJ8

Answer:

the most important effect of the gravitational force is the change in the tide.

Explanation:

The gravitational force between the Moon and the Earth is given by

        F = G m M / r2

where m is the mass of the Moon, M the mass of the Earth, and r the distance between the two.

The magnitude that changes in this formula is the distance between the Moon and the Earth, due to the lunar rotation, at the points of maximum approach in the periods of high tide and in the periods of greater distance the tide is low.

It should be mentioned that the earth's crust is also affected, but its movement is much less than that of water, which is why in almost all cases it is taken as fixed.

Lately it has also been analyzed that the Earth-Moon structure creates greater stability in the rotation of the two bodies.

Consequently the most important effect of the gravitational force is the change in the tide.

(a) Acceleration at 30.0 m/s is 1.17 \(m/s^2\). (b) Drag force is 784 N. (c) Drag force is 540 N.

At the point when a skydiver leaps out of an airplane, she encounters the power of gravity pulling her down and air obstruction or drag force restricting her movement. At first, her speed increase is equivalent to the speed increase because of gravity (\(g = 9.81 m/s^2\)).

Be that as it may, as she falls, the drag force increments until it approaches her weight, and she arrives at maximum speed, where her speed increase becomes zero.

(a) When the skydiver's speed is 30.0 m/s, she is as yet speeding up however not yet at maximum speed. As of now, the drag force is not as much as her weight, so she encounters a net descending power and advances descending. The condition for the drag force is:

\(F_d = 1/2 * rho * v^2 * C_d * A\)

where rho is the air thickness, v is the speed of the item, \(C_d\) is the drag coefficient, and An is the cross-sectional region of the item. Expecting a drag coefficient of 1.0 and a cross-sectional area of 1.0 \(m^2\), the drag force on the skydiver at 30.0 m/s is:

\(F_d = 1/2 * 1.2 kg/m^3 * (30.0 m/s)^2 * 1.0 * 1.0 m^2 = 540 N\)

Utilizing Newton's subsequent regulation, we can compute the net power on the skydiver and her speed increase:

\(F_{net} = mama\)

\(F_{net} = F_d - mg\)

\(a = (F_d - mg)/m = (540 N - 784 N)/80.0 kg = 1.17 m/s^2\)

In this way, the skydiver's speed increase at 30.0 m/s is 1.17 \(m/s^2\).

(b) When the skydiver arrives at maximum speed, her speed increase becomes zero, and that implies that the drag force rises to her weight. Accordingly, the drag force at 50.0 m/s is equivalent to the skydiver's weight:

\(F_d = mg = 80.0 kg * 9.81 m/s^2 = 784 N\)

(c) We determined the drag force on the skydiver at 30.0 m/s to a limited extent (a), which is 540 N. In outline, the skydiver's speed increase at 30.0 m/s is 1.17 \(m/s^2\), the drag force on her at 50.0 m/s is 784 N, and the drag force on her at 30.0 m/s is 540 N.

To learn more about force and speed, refer:

https://brainly.com/question/16995460

#SPJ4

Label the rows as the electron energy levels:

The rows of the periodic table are also known as periods. There are seven periods, and each period corresponds to a particular energy level. You can label them from 1 to 7, starting from the top row.

Label the number of valence electrons in Columns 1, 2, and 13-18:

Columns 1 and 2 are the s-block elements, and they have 1 and 2 valence electrons, respectively. Columns 13-18 are the p-block elements, and they have 3 to 8 valence electrons, respectively. You can label the number of valence electrons in each column.

Label the metals, semi-metals, and non-metals using different colors:

Metals are on the left side of the periodic table, semi-metals are in the middle, and non-metals are on the right side. You can use different colors to label them without obscuring any of the information about different elements.

Label the ion charges for elements in the first 3 rows:

Elements in the first 3 rows of the periodic table have predictable ion charges. The alkali metals (Group 1) have a charge of +1, the alkaline earth metals (Group 2) have a charge of +2, and the elements in Group 13 have a charge of +3. For Groups 15, 16, and 17, the charges are -3, -2, and -1, respectively. The noble gases (Group 18) are unreactive and do not form ions. You can write these charges for each element in their respective positions.

Label the trends for atomic size, ionization energy, and electron affinity:

Atomic size generally decreases from left to right across a period and increases from top to bottom within a group. Ionization energy generally increases from left to right across a period and increases from bottom to top within a group. Electron affinity generally increases from left to right across a period and becomes less negative from top to bottom within a group. You can label these trends on your periodic table as well.

learn more about electron energy levels: https://brainly.com/question/28101665

#SPJ1

Answer:

united states

Explanation:

give brainiest please

Like Charges are the electroscope leaves repel, Ion is the charged atom. Magnetism is the alignment of atoms, Benjamin Franklin invented the lightning rod, Conductor carries a current.

Like charges refer to the positive-positive or negative-negative charges whereas the unlike charges refers to set of positive-negative or negative-positive charges. Repulsion occurs in the like charges which refers to the force which makes the two charges move away from each other.

Like Charges are the Electroscope leaves repel. Ions are the charged atoms. Magnetism is the alignment of atoms. Benjamin Franklin invented the lightning rod. Conductor carries a current. Thomas Edison developed the light bulb. Electromagnet is a wire-wrapped core. Ohm's Law expression: V= I × R. And, Power is equal to I × V.

Learn more about Like charge here:

https://brainly.com/question/24391667

#SPJ1