The sun heats land faster than it heats water. As a result, the air above the water is usually cooler than that above land. Many times, early in the morning, the air above the water is very dense and is difficult to see through. What effect is observed from this difference in temperature?.

Complete question:

A hydraulic jack is used to lift a car by applying a force of 120N at the pump piston, if the area of the ram and pump piston are 100cm squared and 1m squared respectively. What is the weight of the car?

Answer:

the weight of the car is 1.2 N

Explanation:

Given;

applied force, F₁ = 120 N

area of the effort (pump), A₁ = 1 m²

area of the load (ram), A₂ = 100 cm² = 1 x 10⁻² m²

let the weight of the car = F₂

The applied pressure is constant and the following equations can be used to calculate the weight of the car.

\(P = \frac{F_1}{A_1} = \frac{F_2}{A_2} \\\\F_2 = \frac{F_1 \times A_2}{A_1} \\\\F_2 = \frac{120 \times (1\times 10^{-2})}{1} \\\\F_2 = 1.2 \ N\)

Therefore, the weight of the car is 1.2 N

The energy (in j) of one photon of this radiation is  \(2.518*10^{-23}\)J

Given,

frequency = 3. 8 x \(10^{10}\) hz, h = Planck's constant = 6.626*\(10^{-34}\)Js

E=frequency*Planck's constant=3. 8 x \(10^{10}\) hz*6.626*\(10^{-34}\)Js=\(2.518*10^{-23}\)J

In physics, energy is the quantifiable attribute that is transferred to a body or to a physical system, and it can be seen as heat and light as well as while work is being done. The law of conservation of energy asserts that although energy can change its form, it cannot be created or destroyed. Energy is a conserved quantity. The International System of Units (SI) uses the joule as the unit of measurement for energy, which is defined as "the energy transferred to an object by the work of moving it a distance of one metre against a force of one newton."

A radio wave has a frequency of 3. 8 x 1010 hz. what is the energy (in j) of one photon of this radiation? (use scientific notation in your answer: 1. 0e29)

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Answer:

The time in which the pendulum does a complete revolution is called the period of the pendulum.

Remember that the period of a pendulum is written as:

T = 2*pi*√(L/g)

where:

L = length of the pendulum

pi = 3.14

g = 9.8 m/s^2

Here we know that  L = 14.4m

Then the period of the pendulum will be:

T = 2*3.14*√(14.4m/9.8m/s^2) = 7.61s

So one complete oscillation takes 7.61 seconds.

We know that the pendulum starts moving at 8:00 am

We want to know 12:00 noon, which is four hours after the pendulum starts moving.

So, we want to know how many complete oscillations happen in a timelapse of 4 hours.

Each oscillation takes 7.61 seconds.

The total number of oscillations will be the quotient between the total time (4 hours) and the period.

First we need to write both of these in the same units, we know that 1 hour = 3600 seconds

then:

4 hours = 4*(3600 seconds) = 14,400 s

The total number of oscillations in that time frame is:

N = 14,400s/7.61s = 1,892.25

Rounding to the next whole number, we have:

N = 1,892

The pendulum does 1,892 oscillations between 8:00 am and 12:00 noon.

Biomass, Fossil Fuels, Hydroelectric, Solar Energy

Answer: 1. Spinning a magnet inside a coil. Electromagnetic induction IOW

2. Photo electricity

3. Thermo electricity

Answer:

(i) Half

(ii) 3 V

(iii) V₁

Explanation:

(i) The given parameters are;

The circuits have identical resistances

The number of resistors in circuit 1 = 1 resistor

The number of resistors in circuit 2 = 2 resistors

Let 'R' represent the value of each resistor, we have;

The total resistance of circuit 1 = R Ohm

The total resistance of circuit 3 = 2·R Ohm

∴ The total resistance of circuit 1  = (1/2) × The total resistance of circuit 3

∴ The resistance of circuit 1 is half the resistance of circuit 3

(ii) The potential difference of each cell, V = 1.5 volts

The number of cells in circuit 2 = 2 cells

The total potential difference of the cells of circuit 2 = 2 × 1.5 volts = 3 × volts = 3 V.

The voltmeter reading = The potential difference across the cell or cells it is applied

∴ The voltmeter reading on voltmeter, V₂, applied across the cells of circuit 2 = 3 V

(iii) The voltmeter reading V₁ = 1.5 V

The voltmeter reading V₂ = 3 V

The voltmeter reading V₃ = 4.5/(2·R) × R = 2.25 V

Therefore, the voltmeter reading with the smallest volt, is V₁ = 1.5 V

Refraction results from differences in light's speed. The correct answer is C) speed.

Refraction is the term for the bending of light as it passes through transparent materials (it also occurs with sound, water, and other waves). We are able to create lenses, magnifying glasses, prisms, and rainbows because to this bending caused by refraction.

Refraction occurs when light passes through different mediums and changes its speed. This change in speed causes the light to bend, creating the effect of refraction.

This is why objects appear to be in different positions when viewed through water or a lens. The frequency and incident angles of the light do not affect refraction, only the speed of the light does.

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Any point's electric field direction indicates the direction in which a charge would experience an electric force. An opposing force to the electromagnetic current is felt by a negative charge.

The force acting on a positive ions is exerted in the direction of an electric field. F = q E gives the real force applied to a particle having charge q. In the case of a negative charge, it points away from the electric field E.

These lines form a pattern that are sometimes known as "electric field lines," and they point in the If a positive test charge were applied to the line, it would accelerate. Because of this, the lines are pointed in the direction of negatively charged source charges rather than positively charged source charges.

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Answer:

1.....

2.....

Explanation:

1. For the elements in column 1,2 and 13-18 the atoms in the same column have the same amount of outermost electrons, called valence electrons. Atoms in column 1 (H, Li and Na for example) have 1 valence electron.

2. Electron affinity increases from left to right across the periodic table. This is caused by the decrease in atomic radius. As we already explained, moving from left to right across a period, atoms become smaller and smaller as the atomic number increases.

Answer:

10 kg

Explanation:

The mass of the object is always constant and does not depend on the gravitational force of the Earth or the Moon.

Answer:

28 will be the right answer I think

Explanation:

Density = Mass ÷ Volume

Density = 30.943 g ÷ 35.0 mL

             = 0.884 g/mL

Answer:

D

Explanation:

i did that yesterday and your welcome homie b

Answer:

M = 0.037kg

Explanation:

Given the following data

Height, h = 0.15 km to meters = 0.15*1000 = 150m

P.E = 55J

Acceleration due to gravity, g = 9.8m/s²

To find the mass

P.E = mgh

Substituting into the equation, we have

55 = m*9.8*150

55 = 1470*m

Mass, m = 55/1470

Mass, m = 0.037kg

Answer:

There is a right angle and it has three sides.

Explanation:

There are two 45 degree angles and since a triangles sides ALWAYS add up to 180 we know the the other side has to be 90 degrees because 45+45+90=180. And we know that every triangle has three sides because "tri" means three.

Carbon dioxide because that's what we breath out?

Answer:

a) The time it takes the ball to reach maximum height is approximately 3.06 seconds

b) The distance of the ball from the home plate once it is at the top is approximately 38.78 m

c) No

d) The height of the ball when it is at the top is approximately 45.92 m

e) The time it takes the ball to travel 100 m horizontally is 5 seconds

F) The height of the ball when it is 100 m away from the home plate is 27.5 m

G) The height of the ball above the ground when it 100 m away from the home plate, is 27.5 m

The height of the ball above the wall at 100 m from home plate is 3.5 m

Explanation:

The given parameters for the motion of the ball are;

The upward (vertical) velocity of the ball, \(u_y\) = 30 m/s

The across (horizontal) velocity of the ball, uₓ = 20 m/s

The distance from the home plate to the outfield fence = 100 m

The height of the outfield fence = 24 m

a) The time, '\(t_{mh}\)', it takes the ball to reach maximum height is by the following kinematic equation of motion;

\(v_y\) = \(u_y\) - g·t

Where;

\(u_y\) = 30 m/s

g = The acceleration due to gravity ≈ 9.8 m/s²

At maximum height, we have;

\(v_y\) = 0 m/s, t = \(t_{mh}\)

∴ 0 m/s = \(u_y\) - g·\(t_{mh}\)

\(u_y\) = g·\(t_{mh}\)

\(t_{mh}\) = \(u_y\)/g

∴ \(t_{mh}\) = \(u_y\)/g = (30 m/s)/(9.8 m/s²) = 150/49 s ≈ 3.06 seconds

The time it takes the ball to reach maximum height, \(t_{mh}\) ≈ 3.06 seconds

b) The horizontal distance travelled by the ball, when it is at maximum height, \(x_{mh}\), is given as follows;

\(x_{mh}\) = uₓ × \(t_{mh}\) = 20 m/s × 150/49 s

\(x_{mh}\) = 20 m/s × 150/49 s = 3000/49 m

\(x_{mh}\) = 3000/49 m

The distance of the ball from the home plate, 'd', once it is at the top (maximum height), is given as follows;

d = 100 m - \(x_{mh}\)

∴ d = 100 m - 3000/49 m = 1900/49 m ≈ 38.78 m

The distance of the ball from the home plate once it is at the top = d ≈ 38.78 m

c) The ball is yet to reach the fence when it gets to the top

The ball has approximately 38.78 meters to reach the fence

d) The height of the ball, \(h_{max}\), when it is at the top is given by the following kinematic equation

\(h_{max}\) = \(u_y\)²/(2·g)

Where;

\(u_y\) = 30 m/s

g = The acceleration due to gravity ≈ 9.8 m/s²

∴ \(h_{max}\) = (30 m/s)²/(2×9.8 m/s²) = 2,250/49 m ≈ 45.92 m

The height of the ball when it is at the top, \(h_{max}\) ≈ 45.92 m

e) The time, t₁₀₀, it will take the ball to get 100 m from home plate is found from the following relationship;

Velocity, u = Distance, x/(time, t)

∴ Time = Distance/(Velocity)

t = x/v

The given distance is the horizontal distance, therefore, we use the horizontal component of the velocity as follows;

v = Horizontal velocity of the softball = uₓ = 20 m/s

x = The given horizontal distance travelled by the ball = 100 m

t₁₀₀ = The time it takes the ball to travel 100 m horizontally

∴ t₁₀₀ = x/(uₓ) = 100 m/(20 m/s) = 5 s

The time it takes the ball to travel 100 m horizontally, t₁₀₀ = 5 seconds

F) The height of the ball above ground when it is 100 m away from the home plate is given as follows;

When the ball is 100 m from the home plate, the time, t₁₀₀ = 5 seconds

The height of the ball at 100m, \(h_{t_{(100 \, m)}}\), is given according to the kinematic equation of motion for vertical height reached by an object as follows;

h = \(u_y\)·t - 1/2·g·t²

∴ \(h_{t_{(100 \, m)}}\) =  \(u_y\)·t₁₀₀ - 1/2·g·t₁₀₀²

Plugging in the known values gives;

\(h_{t_{(100 \, m)}}\) =  30 m/s × 5 s  - 1/2 × 9.8 m/s × (5 s)² = 27.5 m

The height of the ball when it is 100 m away from the home plate, \(h_{t_{(100 \, m)}}\) = 27.5 m.

G) The height of the ball above the ground when it 100 m away from the home plate, is  \(h_{t_{(100 \, m)}}\) = 27.5 m

The height of the ball above the wall at 100 m from the home plate = The height of the ball when it is 100 m away from the home plate - The height of the wall at 100 m away from the home plate

∴ The height of the ball above the wall at 100 m from home plate = 27.5 m - 24 m = 3.5 m.

Answer:

G 20N of force

Explanation:

Every action has an equal and opposite reaction. The wall exterts as much force as you push on it.

Answer:

It is g

Explanation:

The wall is not moving nor is the kid therefore the force is equal

The rotor shaft of a generator is spun or rotated by the fluid's force on the blades.

When sunlight strikes a solar cell, electrons in the silicon are expelled, causing the silicon to generate "holes"—the voids the departing electrons left behind.

Electrons will be moved to the n-type layer and holes to the p-type layer if this occurs in the electric field. The bonds [between silicon atoms] in a crystal are created by electrons that are shared by all of the atoms in the crystal.

One of the electrons in one of the bonds is stimulated to a higher energy level by the absorption of the light and is thus given more freedom to move than when it was bound. Silicon is the chosen photovoltaic (PV) material because it has a high absorption rate and can generate power from solar energy.

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The force required to keep the sled from sliding down the inclined plane is 14.27 N.

To find the force required to keep the sled from sliding down the inclined plane, we first need to calculate the component of the weight acting parallel to the plane. This can be done using the formula:

Force parallel = Weight * sin(angle)

Given that the weight of the sled is 72 N and the angle of the plane is 20°, we can calculate:

Force parallel = 72 N * sin(20°) = 24.54 N

The force of static friction acts in the opposite direction of the force parallel, so it can be calculated as:

Force of static friction = Coefficient of static friction * Normal force

The normal force can be calculated using the formula:

Normal force = Weight * cos(angle)

Normal force = 72 N * cos(20°) = 67.97 N

Now, substituting the values into the formula, we have:

Force of static friction = 0.21 * 67.97 N = 14.27 N

Since the sled is at rest, the force of static friction is equal to the force parallel:

Force of static friction = Force parallel

Therefore, the force required to keep the sled from sliding down the inclined plane is 14.27 N.

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The energy transferred as heat for a reversible isothermal expansion of an ideal gas at 132∘ C is 18,630 J.

We can use the relationship between heat, temperature, and entropy for an ideal gas undergoing a reversible process:

ΔS = Qrev/T

where ΔS is the change in entropy, Qrev is the heat transferred in a reversible process, and T is the temperature in Kelvin.

We can rearrange this equation to solve for Qrev:

Qrev = ΔS x T

Now we can plug in the given values:

ΔS = 46.0 J/K (given)

T = 132 + 273 = 405 K (since the temperature is given in Celsius, we add 273 to convert to Kelvin)

Qrev = 46.0 J/K x 405 K

Qrev = 18,630 J

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The fundamental frequency of the tube is 0.240 m long, by taking air temperature to be \(37^o\)C is 367.42 Hz.

A standing wave is basically a superposition of two waves propagating opposite to each other having equal amplitude. This is the propagation in a tube.

The fundamental frequency in the tube is given by

\(f=\frac{v_T}{4L}\)

where, \(v_T=v\sqrt{\frac{T}{273} }\)

Since, T=37+273 K = 310 K

v = 331 m/s

\(\therefore v_T=331\sqrt{\frac{310}{273} } = 352.72 \ m/s\)

Using this, we get:

\(f=\frac{352.72}{4(0.240)} \\f=367.42 \ Hz\)

Hence, the fundamental frequency is 367.42 Hz.

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The maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

To calculate the maximum possible speed of the train at the end of the first 4.0 km of the journey, we can apply the principle of conservation of energy.

Assuming there are no external forces like friction or air resistance, the initial potential energy of the train will be converted into kinetic energy.

The potential energy (PE) of the train at the beginning of the journey can be calculated as PE = mgh, where m is the mass of the train, g is the acceleration due to gravity (approximately \(9.8 m/s^2\)), and h is the height difference (in this case, we assume it to be zero).

The kinetic energy (KE) of the train at the end of the 4.0 km journey can be calculated as \(KE = (1/2)mv^2\), where v is the velocity of the train.

Since the potential energy is converted into kinetic energy, we can equate the two expressions:

PE = KE

\(mgh = (1/2)mv^2\)

Simplifying and canceling out the mass:

\(gh = (1/2)v^2\)

Substituting the values, \(g = 9.8 m/s^2\)and h = 0, we get:

\((9.8 m/s^2)(0) = (1/2)v^2\)

Simplifying further:

\(0 = (1/2)v^2\)

This equation tells us that the maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

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Answer:   1470 N

Explanation:   mass = 15

                   weight is the product of mass and force due to gravity

                     AS WE KNOW THAT

                        W = mG

                        W = 15 X 9.8

                         W =  1470 N

Answer: 115 N

Explanation:

In this case, the ball has a weight of 15 N (force due to gravity) acting on it and the cannon is shooting it with a force of 100 N.

To find the net force on the ball, we add the forces acting on it.

Net force = force due to gravity + force due to the cannon

Net force = 15 N + 100 N

Net force = 115 N

So, the net force on the ball will be 115 N. ✅

PLEASEEEE GIVE BRANLIEST

Answer:

Because the sun gives off a type of light that carries energy, and light from the desk lamp does not.

Explanation:

All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.

Visible light are able to penetrate the atmosphere

A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. This length is often defined in wireless systems in metres (m), centimetres (cm), or millimetres (mm).

The electromagnetic spectrum is made up of a variety of electromagnetic radiations, including radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays, and gamma rays. Because the earth's atmosphere blocks off the majority of the electromagnetic spectrum's wavelengths, most electromagnetic energy from space cannot reach the planet's surface.

. A portion of the electromagnetic spectrum that humans can see with our eyes is the visible light or spectrum. The electromagnetic spectrum's band that can most easily reach Earth's surface is also this one.

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The displacement of the plane is equal to 809 Km.

The displacement can be defined as the shortest distance between two points on the path. The displacement is a vector parameter because it has both direction and magnitude. The displacement may be positive, negative, or zero as well as can change with time.

Consider that A is Pittsburg, B is Charlotte and C is Orlando as shown below:

A------------------B---------------C

Given, the distance between Pittsburg to Orlando, AC = 1562 Km

The distance  from Orlando to Charlotte, BC = 753 Km

Displacement is the distance between the starting point (Pittsburg) and the ending point (Charlotte).

Displacement of the plane, AB = AC - BC = 1562 - 753 = 809 Km

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