Look at the graph below. It shows the cost of heating a certain house month by month over the course of a year. During which times of the year is the most energy used for heating? Explain your answer.

A constant called Planck's constant directly connects the energy of a photon to the frequency of vibration of a charged particle.

E=hv 1.48 x 10-15 J

= (6.626 x 10-34) (v)

v= 1.48 x 10-15 J/6.626 x 10-34

v= 2.23 x 10 18 Hz

In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles .

In science and engineering, frequency is a crucial metric for describing the temporal rate of change seen in oscillatory and periodic processes.

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Answer:

Explanation:

The spectrum of the planet clearly shows the presence of iron, hydrogen and sulfur.

The spectrum of the planet shows the presence of iron, hydrogen and sulfur.

A spectrum is a state that may fluctuate without gaps over a continuum and is not constrained to a particular set of values (plural: spectra or spectrums)[1]. After passing through a prism, visible light takes on a rainbow of colours, which is how the term was first used scientifically in optics. As knowledge of light increased on a scientific level, it started to encompass the entire electromagnetic spectrum. As a result, it evolved into a mapping of a variety of magnitudes (wavelengths) to a variety of attributes, including the perceived "colours of the rainbow" and other features that correspond to wavelengths outside of the visible light spectrum.

Today, analogies with spectrum are used to discuss subjects unrelated to optics.

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The specific heat of this metal is  0.385 j/g°C.

The Specific heat ability of a substance is the heat potential of a pattern of the substance divided by the mass of the sample, also sometimes called massic heat ability.

The specific warmth ability is defined as the quantity of warmth (J) absorbed consistently with the unit mass (kg) of the cloth whilst its temperature will increase 1 k (or 1 °C), and its gadgets are J/(kg k) or J/(kg °C).

Specific heat is described by the quantity of warmth had to increase the temperature of 1 gram of a substance 1 diploma Celsius (°C). Water has a high precise heat, which means it takes more power to grow the temperature of water compared to different materials.

heat = msΔt

s = heat/mΔt

s =  14,014 /  2,800 × 13

s = 0.385 j/g°C

Hence the specific heat of this metal is = 0.385 j/g°C

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175 Newton  work is done in each stroke.

we have given the data

force=500 newton

distance=0.35 m

now,

work done= force×distance

[tex][W=Fd],[=(500N)(0.35m)],[=175N][/tex]

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There are 2.6 hours after sunrise with the moon rise.

The new moon rises with the sunrise and the sun is on the eastern horizon. On this day, the Moon crosses the daytime sky with the Sun. There is a new moon in the sky during the day, but it is not visible from Earth. On new moon days, the moon is between the earth and the sun. at 270 degrees.

The Moon completes its crescent phase enters the third quarter of its congressional period and becomes a waning crescent until it reaches a new lunar phase to restart the cycle. And indeed, the position of the Moon around the Earth plays a role in solar and lunar eclipses. His quarter of the Moon is visible from Earth. That is, the sun-side half of the moon is visible making it look like half a pie.

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720 kgf is the vertical force between the elevator floor and the desk.

Mass of table in elevator = 60 kg

Acceleration of table and elevator (upward movement) = 2.2 m/s²

To determine the vertical force between the elevator floor and table.

where:-

N = normal force between elevator floor and table

m = mass of the table

g = gravity (9.8 m/s²)

a = acceleration of table and elevator (upward motion)

N = mg + ma

N = 60 kg x 9.8 m/s² + 60 kg x 2.2 m/s²

N = 588 + 132

N = 720 kgf

∴ N=720 kgf is the vertical force between the elevator floor and the desk.

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The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.

What is intensity?

In physics, the power transferred per unit area is known as the intensity or flux of radiant energy, where the area is measured on a plane perpendicular to the direction of the energy's propagation. Watts per square metre (W/m2) and kilogrammes per square metre (kg/s3) are the units used in the SI system. With waves like acoustic waves (sound) or electromagnetic waves like light or radio waves, intensity is most usually employed to describe the average power transfer across one period of the wave. Other situations where energy is exchanged can also be described in terms of intensity. One could, for instance, figure out how much kinetic energy each drop of water from a sprinkler is carrying.

The intensity is Io/2 after going through the first polarizer.

At some point, let the angle between the polarizers be.

The intensity is then given as after going through the second polarizer.

I = cos2(Io/2).

Cos2 is 1 at 0°, 180°, and 360° and zero at 90° and 270° because ranges from 0 to 360°. Consequently, the transmitted light's intensity I,

The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.

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The reinforcement schedule is this variable interval.

Shaping is the use of iterative approximation enhancements to the desired behavior. In particular, when molding techniques are used the approximate desired motion exhibited is enhanced, but the motion that is not an approximation of the desired motion is not enhanced.

Continuous reinforcement is reinforcement that is repeated each time the behavior occurs. This may involve a positive applying the stimulus or negative reinforcement with the aim of encouraging a specific behavior. Continuous enhancement is one of the two basic types of enhancement plans. Associative learning occurs when organisms associate stimuli or events that occur simultaneously in their environment.

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You can obtain important information on this topic, such as the density of freshwater and ocean, in textbooks or online.

Pf for freshwater is 1x103 kg/m3.

Pf for seawater is 1025 kg/m3.

We may now compare the densities of the lady and the freshwater using the equation of fraction submerged, which compared the densities of both elements.

a). Pw + Pf = Fs

Put an end to the woman's density

Pw = Fs * Pf Pw = 1x103 kg/m3 * 0.96 = 960 kg/m3

Fs * Pf Fs = 1.0 - 0.04 = 0.96

Currently, the proportion of sea water is:

Fs = Pw/Ps = 960 / 1025 kg/m3 = 0.9366

Fs = 1.0 - 0.9366 = 0.0634 * 100

%v = 6.34

Density is defined as the measure of how closely a material is packed together. It is described as the mass per unit volume. D or ρ is the symbol for density. Density Formula: = m/V, where is the density, m is the object's mass, and V is its volume.

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work done = f.d cos x = 300* 400* cos 70 = 41040 J

Work done by the vertical component. = 281.9 x 400x cos 70 = 38563.9 J

Work done by horizontal component = 102.6 x 400x cos 70

 = 14035.68 J

The force and its displacement are 300N and 400m lalong the

direction of 70° horizontal.

work done = f.d cos x = 300* 400* cos 70 = 41040 J.

Work done by horizontal component = horizontal force x d cos x

horizontal force = 300 x cos 70 =300 x .342 = 102.6 N

Work done by horizontal component = 102.6 x 400x cos 70

 = 14035.68 J

force  by the vertical component. = 300x sin 70 =300x .939

= 281.9 N

Work done by the vertical component. = 281.9 x 400x cos 70 = 38563.9J

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Answer:

t

Explanation:

Answer:

C - 5.3s

Explanation:

a = v - u / t

so,

t = v - u / a

t = 180 - 100 / 15

t = 5.3s

According to  the given statement the resistance of a 37.0 m long piece of such wire is 3151Ω.

Resistance values are represented in ohms. When there is an electron difference between two endpoints, electricity can flow from high to low. In opposition to that flow is opposition. As critical stress intensity, the current decreases. On the other side, when the resistance decreases, the current rises.

Copper wire's resistance (R) at 20 degrees Celsius is 1.72x10^-8Ωm.

Coil length(L) of the wire=37.0m

Cross-sectional area of the conductor or wire (A) = π²

A= π * (1.291/1000)/2=2.02*10⁻⁶

To calculate for the resistance (R):

R=ρ*L/A

R=(1.72*10⁸)*(37.0)/(2.02*10⁻⁶)

R=3150.49Ω

Approximately, R=3151Ω

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Answer:

a solid = wood

a liquid = a puddle

a gas = oxygen

Explanation:

These are three things that you can find like in my backyard

Answer:

Q = 553 J = c M ΔT      heat released

ΔT = Q / (c * M)

ΔT = 553 J / (.13 J/g-K * 84 g) = 50.6 K      change in temperature

72 - 50.6 = 21.4 deg K        final temperature os metal

The velocity of the 2 Kg ball as it was launched, given that it has a kentic energy of 25 J is 5 m/s

From the question given above, the following data were obtained:

The velocity of the ball can be obtained as illustrated below:

KE = ½mv²

Plug in the variables

25 = ½ × 2 × v²

25 = v²

v = √25

v = 5 m/s

Thus, from the calculation made above, we can conclude that the velocity is 5 m/s

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In 15 seconds, the car has travelled a distance of  270 meters.

The three equations of motion are -

Given is a car at rest which begins accelerating at 2.4 m/s² for 15 s.

From the given data, we can write -

[u] = 0 m/s

[a] = 2.4 m/s²

[t] = 15 s

We will use the second equation of motion to find how far the car has gone.

S = ut + 1/2at²

Substituting the values, we get -

S = 0 x 15 + 0.5 x 2.4 x 15 x 15

S = 0.5 x 2.4 x 15 x 15

S = 270 meters

The car has travelled 270 meters.

Therefore, in 15 seconds, the car has travelled a distance of  270 meters.

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There are many forces that influence waves; they are classified as either generating or restoring forces. The generating forces are option A, C, D and E:

Wind is the most frequent cause of waves. The friction between the wind and the surface of the water produces wind-driven waves.

Note that A wave crest is produced when wind often disturbs the water's surface in an ocean or lake. The movement of the water, gravitational pull, and wind all contribute to the formation of waves.

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Wind

Animals

Physical displacement

Pressure differences

Earthquakes

Suki can go 0.854 meters to the end before the beam starts to tilt.

Beam length: L = 6.5 m

Beam weight: W b = 336 N

Suki's weight is W s = 590 N.

Suki stands in the middle of the steel beam and moves toward the end. Since the beam is supported by two posts that are spaced three meters apart, the distance she may go before the beam starts to lean is determined by how far she moves from the left support.

Thus;

according to formula

Wb × (3/2) = (Ws × x)

where:

Wb= Beam weight

Ws= Suki's weight

Adding the necessary values results in;

336 × 1.5 = 590 × x

x = (336 × 1.5)/590

x = 0.854 m

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Freefall is the state of a body that moves freely in any direction in the presence of gravity. The window is 15.01 meters above the ground.

According to free fall,

vf = g * t

here Vf = 17.2 m/s

g = 9.8 m/s^2

then t = vf/ g = 17.2/9.8 =1.75 sec

According to free fall Equation,

Distance d = 1/2 g * t^2

d= 1/2 *9.8 * 1.75^2= 15.01 m

Window is located 15.01 m height from the Ground.

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The Distance from the desk the can landed when it rolls off the horizontal desk with a velocity of 0.14 m/s is 3.66 m.

Distance is the total lenght between two points.

To calculate how far (Distance) from the desk the can landed, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The distance from the desk at which the can land is 3.66 m.

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The total resistance when generating power of 30 kW is 3 x 10¯⁶ Ω.

We need to know about power to solve this problem. Power is the energy dissipated because of resistance. The magnitude of power is proportional to current and voltage. It can be determined as

P = I . V

where P is power, I is current and V is voltage.

By using Ohm's Law, power also can be calculated using resistance.

P = V² / R

where R is resistance.

From the question above, we know that

P = 30 kW = 30000 W

V = 100 kV = 100000

By substituting the following parameters, we get

P = V² / R

30000 = 100000² . R

R = 30000 / 100000²

R = 3 x 10¯⁶ Ω

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Stellar equilibrium is a balance between Outward pressure and inward gravity.

As long as a balance is maintained between the gravity that pulls the star inwards and the pressure that pushes it outwards, the stars are fine. During most of a star's life, its internal heat and radiation are provided by nuclear reactions in the star's core. Star balance refers to the balance of forces that exist within a star.

Stars are composed of helium gas and hydrogen gas constantly undergoing nuclear reactions in their core. The pressure of these reactions pushes out of the star. At the same time gravity is pushing the star. At the main-sequence stage of stellar evolution, the outward-pushing radiation pressure and the inward-pushing gravitational pressure are precisely balanced. In a stable star, the pressure of gas pushing away from the center is the same as the gravitational force pulling atoms toward the center.

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In the Van de, Graaff generator is a rubber belt stretched over two pulleys. At the bottom is the drive pulley connected to the motor. In the generator above the drive, the pulley is covered with felt and the top pulley is bare plastic.

Van de Graaff Generators are devices used to generate large amounts of static electricity. Static electricity is created by an extra charge stored somewhere to keep things from moving. Fees generally don't like to accumulate in one place. They seek out opposite charges as partners and like to run away from particles with the same charge.

When switched on the dome of the Van de Graaff generator is charged positively or negatively depending on the design. Anything that touches the dome receives the same charge. When a person has a dome, it is charged and can stand on end if the hair is long and dry enough. Most Van de Graaff generators store a positive charge in the dome by separating the negative charge from the positive charge.

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The The force of friction acting on the car as you apply the brake is 13,230 N and the centripetal force of the car is 4,338 N.

The centripetal acceleration of the car is calculated as follows;

ac = v²/r

where;

substitute the given parameters and solve for the centripetal acceleration of the car.

ac = (19²) / (150)

ac = 2.41 m/s²

The force of friction acting on the car as you apply the brake to prevent you from hitting the deer is calculated as follows;

μ = Ff/W

μ = Ff / mg

where;

Ff = μ (mg)

Ff = 0.75(1800 x 9.8)

Ff = 13,230 N

The centripetal force of the car is calculated as follows;

F = mac

F = 1800 x 2.41

F = 4,338 N

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The complete question is below;

you are driving your 1800 kg car at 19 m/s over a circular hill that has a radius of 150 m. a deer running across the road causes you to hit the brakes hard while right at the summit of the hill, and you start to skid. the coefficient of kinetic friction between your tires and the road is 0.75. Find the force of friction on the car and the centripetal force of the car.

The smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

A recognized and accepted standard for measuring other amounts of the same sort is referred to as a unit of measurement. It is predetermined by custom or law.

As given in the problem, we have to find out what is the smallest particle size a scientist can observe using a scanning probe microscope.

1 millimeters = 1 × 10 ⁻³ meter

1 nanometer = 1 × 10⁻⁹  meters

Thus, the smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

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The horizontal force to be applied on the puck is  2.16 N

The horizontal force to be applied to a puck of given mass and acceleration on a friction-free table

Given:

A 1.2-kg puck is moved on a horizontal friction-free air table with an acceleration equal to that of 1.8 [tex]m/s^2[/tex]

Using Newton’s second law of motion, a body experiencing a force F gets accelerated in the direction of the force and its magnitude a is proportional to magnitude of the applied force. It also holds an inverse relation with the mass of the body m . This can be expressed as,

[tex]F = Ma[/tex]

Here, mass of the puck is 1.2kg. The acceleration is 1.8 [tex]m/s^2[/tex]

F = 1.2 x 1.8

F = 2.16 N    

Friction is a force that prevents the relative movement of solid surfaces, fluid layers and material elements sliding against each other. There are several types of friction:

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The  s-processes produce elements lighter than lead and the r-processes would produce heavier elements.

Most of the elements are produced through processes in  the stars. There are two types of processes the r-process and the s-process. In r-process,  a heavy atom captures the nearby neutron, it can  transfer to heavier isotope or element. And when this happens multiple times to an atom, heavy elements are produced. Thus,  r-processes would produce heavier elements.

The s-process is slower. It uses neutron capture and the subsequent decay of that neutron into a proton resulting in formation of the lighter elements. Thus s-processes produce elements lighter than lead.

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