The principal absorber(s) of the solar radiation that is intercepted by the Earth-atmosphere system is (are)

Answer:

The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.

Explanation:

is the energy stored in moving objects. As the object moves faster, more energy is stored.

called MOVEMENT energy

Answer:

180 m/s

Explanation:

acceleration = 60 m/s2

time = 3 secs

u(initial velocity) = 0 m/s

v(final velocity) = ?

equation used is = v = u + at

0 + 60*3

v = 180 m/s

A dragster's top acceleration is 60 meters/second². If it accelerates for 3 seconds from the starting line, then the total distance covered by it would be

The rate of change of the velocity with respect to time is known as the acceleration of the object.

As given in the problem a dragster's top acceleration is 60 meters/second². If it accelerates for 3 seconds from the starting line, then we have to find out the total distance traveled by it,

top acceleration of the dragster = 60 meters/second²

time period to accelerate = 3 seconds

By using the second equation of motion,

s = ut + 1/2at²

s = 0 + 0.5×60×3²

s = 270 meters

Thus, the total distance covered by the dragster would be  270 meters

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The peak-to-peak voltage of this signal is 344 V if an electrician uses a multimeter to measure the AC voltage of an outlet and reads 122 V.

The AC voltage of an outlet is a sinusoidal signal that oscillates between positive and negative values. The voltage that the electrician measures using the multimeter is the root mean square (RMS) voltage, which is a measure of the average power of the AC signal. The RMS voltage is related to the peak-to-peak voltage by the following equation:

V_rms = V_p-p / (2*sqrt(2))

where V_rms is the RMS voltage, V_p-p is the peak-to-peak voltage, and sqrt(2) is the square root of two.

To find the peak-to-peak voltage, we can rearrange the equation as follows: V_p-p = 2*sqrt(2)*V_rms

Substituting the given value of RMS voltage, we get: V_p-p = 2*sqrt(2)*122 V = 343.6 V

Rounding this result to two significant figures, we get: V_p-p = 344 V

Therefore, the peak-to-peak voltage of this signal is 344 V.

In conclusion, we found that the peak-to-peak voltage of the AC signal measured by the electrician is 344 V, by using the RMS voltage and the formula for calculating the peak-to-peak voltage of a sinusoidal signal.

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Answer:

I want to say Liters but not 100% sure

Answer:

node jaer  le cotenidonv

Explanation:

escirbloa em cuietw n   bl********

Answer:

4 weight loss

Explanation:

Answer:

Radioactive Decay

Explanation:

The magnitude of the change in momentum of the ball is 8 kg m/s.

The change in momentum of the ball can be calculated using the equation

Δp = 2mv,

where Δp is the change in momentum, m is the mass of the ball, and v is the velocity of the ball.

In this case, the ball has a mass of 0.2kg and a velocity of 20m/s.

Since the ball rebounds elastically, its velocity changes sign after hitting the wall, so the change in velocity is 40m/s. Plugging in these values to the equation,

we get Δp = 2(0.2kg)(40m/s) = 8 kg m/s.

The magnitude of the change in momentum of the ball is 8 kg m/s, which means that the ball's momentum changes by 8 kg m/s after bouncing off the wall at a right angle with a speed of 20m/s.

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The amount of energy that the 500 W toaster uses if it is operated for 6.4 minutes is 0.0535 kWh.

To calculate the energy used by the 500W toaster in the morning, we need to convert the wattage to kilowatts and then multiply it by the time it was in operation.

500W = 0.5 kW

Energy used (kWh) = Power (kW) x Time (hours)

First, we need to convert 6.4 minutes to hours by dividing by 60:

6.4 min ÷ 60 = 0.106 hours

Now we can calculate the energy used:

Energy used (kWh) = 0.5 kW x 0.106 hours

Energy used (kWh) = 0.0535 kWh

Therefore, the 500W toaster uses 0.0535 kWh of energy in the morning if it is in operation for a total of 6.4 minutes.

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The velocity of the water in the hose is 4.5 m/s.

The pressure differential between the water in the hose and the water in the nozzle is 342750 Pa.

It will take approximately 0.00303 seconds to fill the tub with a volume of 60 liters using the hose.

The top of the ice block does not float above the water level.

Approximately 14,741 penguins of mass 23 kg each can stand on the ice block before their feet get wet.

The equation for continuity is:

A1v1 = A2v2

we can calculate the cross-sectional areas:

A1 = π *\((3.8/2)^2\)

A2 = π *\((1/2)^2\)

Substituting the values we have:

(π * \((3.8/2)^2\)) * v1 = (π *\((1/2)^2\)) * 18

Simplifying the equation,

v1 = (1/4) * 18 = 4.5 m/s

Therefore, the velocity of the water in the hose is 4.5 m/s.

The pressure differential between the water in the hose and the water in the nozzle can be calculated using Bernoulli's equation.

P1 + 1/2 * ρ * \(v1^2\) = P2 + 1/2 * ρ * \(v2^2\)

Since the water has no viscosity or other form of energy dissipation, we can neglect the effect of gravitational potential energy and simplify the equation further:

P1 = P2 + 1/2 * ρ * \((v2^2\)- \(v1^2\))

Substituting the known values, we have:

P1 = P2 + 1/2 * 1000 * (\(18^2\) - \(4.5^2\))

Calculating the expression, we find:

P1 = P2 + 342750 Pa

Therefore, the pressure is 342750 Pa.

The volume flow rate is given by:

Q = A * v

The cross-sectional area of the hose is given by:

A = π * \((3.8/2)^2\)

Substituting the values calculated we have:

Q = π *\((3.8/2)^2\) * 4.5

To convert the volume flow rate from m³/s to liters/s, we multiply by 1000.

Q = π * \((3.8/2)^2\) * 4.5 * 1000

The time it takes to fill the tub is given by:

t = V / Q

Converting 60 liters to m

V = 60 / 1000 = 0.06 m³

Substituting the values into the equation we get:

t = 0.06 / (π * \((3.8/2)^2\) * 4.5 * 1000)

Simplifying the equation, we find:

t ≈ 0.00303 seconds

Therefore, it will take approximately 0.00303 seconds

The rectangular block of ice floating in sea water:

Buoyant force = weight of displaced water

The weight of the displaced water is given by:

Weight = density of water * volume of displaced water * gravitational acceleration

The volume of displaced water is equal to the volume of the submerged portion of the ice block. Since the ice block is fully submerged, the volume of displaced water is equal to the volume of the ice block itself.

The volume of the ice block is given by:

Volume = length * width * height

Substituting the given values, we have:

Volume = 7 * 7 * 0.7 = 34.3 m³

Next, we can calculate the buoyant force:

Buoyant force = density of water * volume of displaced water * gravitational acceleration

Buoyant force = 1025 * 34.3 * 9.8

Simplifying the equation, we find:

Buoyant force ≈ 339039 N

The buoyant force is equal to the weight of the ice block. Therefore, the height the top of the ice block floats above the water level is determined by the equilibrium condition:

Weight of ice block = Buoyant force

Weight of ice block = density of ice * volume of ice * gravitational acceleration

Weight of ice block = 917 * (7 * 7 * 0.7) * 9.8

Simplifying the equation, we find:

Weight of ice block ≈ 341089 N

Since the weight of the ice block is greater than the buoyant force, the ice block sinks. Therefore, the top of the ice block does not float above the water level.

To determine how many penguins of mass 23 kg each can stand on the ice block before their feet get wet, we need to consider the maximum weight the ice block can support before it becomes fully submerged.

The maximum weight the ice block can support is equal to the buoyant force it experiences when fully submerged. We have already calculated the buoyant force to be approximately 339039 N.

To find the number of penguins, we divide the maximum weight the ice block can support by the mass of each penguin:

Number of penguins = Maximum weight / Mass of each penguin

Number of penguins = 339039 / 23

Calculating the expression, we find:

Number of penguins ≈ 14741

Therefore, approximately 14,741 penguins of mass 23 kg each can stand on the ice block before their feet get wet.

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The complete question is : A long horizontal hose of diameter 3.8 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1 cm. Water squirts from the nozzle at velocity 18 m/sec. Assume that the water has no viscosity or other form of energy dissipation.

1)What is the velocity of the water in the hose ?

2)What is the pressure differential between the water in the hose and water in the nozzle ?

3)How long will it take to fill a tub of volume 60 liters with the hose ?

A rectangular block of ice 7 m on each side and 0.7 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3.

1)How high does the top of the ice block float above the water level?

2)How many penguins of mass 23 kg each can stand on the ice block before they get their feet wet?

Answer:

16kg*m/s west

Explanation:

P=M*V

Momentum= Mass time velocity, plug it into the formula,

M is 4 and V is 4, 4*4=16, and since the object is moving west its going to be west.

basically saying in simpler terms,

16=4*4

Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

The average acceleration of the car is 0.88 m/s² but the displacement of the car is zero.

Displacement can be defined as the overall distance traveled by an object or length of a strait line between final and initial position of the object.

It can be fined as the overall change in velocity of the object in given time. It can be given as:

\(a_{avg} = \dfrac {v_f- v_i}{t}\)

Where,

\(v_f\) - final velocity

\(v_i\) - initial velocity

\(t\) - time

Put the values in the formula,

\(a_{avg}= \dfrac {(85 {\rm \ m/s} - 60{\rm \ m/s}}{8.57 {\rm \ s}} \\\\a_{avg}= 0.88 {\rm \ m/s^2}\)

Therefore, the average acceleration of the car is 0.88 m/s² but the displacement of the car is zero because the initial final position is the same.

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Answer: The average acceleration of the car is 0.88 m/s² but the displacement of the car is zero.

What is displacement?

Displacement can be defined as the overall distance traveled by an object or length of a strait line between final and initial position of the object.

Average acceleration:

It can be fined as the overall change in velocity of the object in given time. It can be given as:

Where,

- final velocity

- initial velocity

- time

Put the values in the formula,

Therefore, the average acceleration of the car is 0.88 m/s² but the displacement of the car is zero because the initial final position is the same.

Explanation:

The magnitude of the force due to q and 5q on each other is 5 times the force (5f) between charges q and q.

The magnitude of the force between two point charges with charge q separated by a distance r is given by Coulomb's law:

\(F = (k \times q_1 \times q_2 )/ r^2\)

where k is Coulomb's constant.

If we replace one of the charges with another charge q' = 5q, the force between the two charges becomes:

\(F' = (k \times q \times 5q) / r^2 = (5k \times q^2) / r^2\)

So the magnitude of the force on the remaining charge q is:

\(F_q = F' = (5k \times q^2) / r^2 = 5f\)

Therefore, the magnitude of the force on the q charge is 5 times the original force f.

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The overall efficiency (in %) of the plant is 30% if the steam power plant with a power output of 150 MW consumes coal at a rate of 60 tons/h.

Efficiency is the capacity to achieve something or get the desired outcome without wasting resources, time, money, energy, or effort.

It is given that:

A steam power plant with a power output of 150 MW consumes coal at a rate of 60 tonnes per hour.

As we know,

Thermal efficiency Te = (W/Q)x100

m(coal) = 60 tons/h = 50/3 kg/s

The heating value of the coal is 30,000 kj/k = 30 MJ/kg

Q = (50/3)30

Q = 500 MW

Te = (150/500)100

Te = 30%

Thus, the overall efficiency (in %) of the plant is 30% if the steam power plant with a power output of 150 MW consumes coal at a rate of 60 tons/h.

The question is incomplete.

The complete question is:

A steam power plant with a power output of 150 MW consumes coal at a rate of 60 tonnes per hour. If the heating value of coal is 30,000 KJ/kg, determine the overall efficiency (in %) of the plant.

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Heredity, also known as genetics, can influence personality traits in several ways.

Firstly, genetics can influence the temperament of an individual, which refers to their innate and consistent patterns of emotional reactivity and self-regulation. Some people are naturally more reactive and emotional, while others are more calm and more relaxed. These differences can be partially attributed to genetic factors.

Secondly, genetics can also play a role in determining certain personality traits, such as extraversion, agreeableness, and conscientiousness. Studies of identical twins, who share 100% of their genes, have shown that these traits are more similar between identical twins than between fraternal twins or non-twin siblings, who share only 50% of their genes on average.

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Answer:

220 seconds

Explanation:

Conduction: One example of a situation where heat flowed through conduction in the last 24 hours is when I held a hot mug of tea. As I grasped the mug, the heat from the hot liquid transferred to the ceramic material and then to my hand through direct contact.

This heat transfer occurred due to the conduction of thermal energy from the higher temperature object (the tea) to the lower temperature object (my hand) via physical contact. Convection: An example of heat flowing through convection in the last 24 hours is when I used a fan to cool down a room. As the fan circulated the air in the room, it facilitated convective heat transfer. The fan helped displace the warmer air near me and replaced it with cooler air, creating a convection current that carried away the excess heat and promoted a cooling effect.  Radiation: Throughout the day, I experienced heat flowing through radiation when I stood under the sun. The Sun emitted radiant energy, including visible light and infrared radiation. As these electromagnetic waves reached the Earth, they transferred heat energy to my body without the need for direct contact or a medium. The sensation of warmth on my skin was a result of the thermal energy absorbed from the Sun's radiation.

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The total cooling degree days (CDDs) of the two days is -10 CDDs. This is because the base temperature for cooling degree days is 65 degrees Fahrenheit, and both days had temperatures below 65 degrees Fahrenheit.

Cooling degree days (CDDs) are a measure of how much cooling is needed to maintain a comfortable indoor temperature.

They are calculated by subtracting the base temperature from the average temperature for a day or a period of days. The base temperature for cooling degree days is typically 65 degrees Fahrenheit.

In this case, the average temperature for day 1 is 45 degrees Fahrenheit and the average temperature for day 2 is 75 degrees Fahrenheit. Subtracting the base temperature from each average temperature gives us:

Day 1: 45 degrees Fahrenheit - 65 degrees Fahrenheit = -20 degrees Fahrenheit

Day 2: 75 degrees Fahrenheit - 65 degrees Fahrenheit = 10 degrees Fahrenheit

The total cooling degree days for the two days is the sum of the cooling degree days for each day, or -20 degrees Fahrenheit + 10 degrees Fahrenheit = -10 degrees Fahrenheit.

CDD_day_1 = 45 degrees Fahrenheit - 65 degrees Fahrenheit = -20 degrees Fahrenheit

CDD_day_2 = 75 degrees Fahrenheit - 65 degrees Fahrenheit = 10 degrees Fahrenheit

total_CDDs = CDD_day_1 + CDD_day_2 = -20 degrees Fahrenheit + 10 degrees Fahrenheit = -10 degrees Fahrenheit

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Answer:

2.22m/s^2

Explanation:

The third harmonic is equal to three times the fundamental frequency, the fifth harmonic is equal to five times the fundamental frequency, and the seventh harmonic is equal to seven times the fundamental frequency.

Harmonics are integer multiples of the fundamental frequency, which is the lowest frequency component of a complex wave. For example, if the fundamental frequency of a wave is 50 Hz, the third harmonic would be 150 Hz (3 x 50 Hz), the fifth harmonic would be 250 Hz (5 x 50 Hz), and the seventh harmonic would be 350 Hz (7 x 50 Hz). Harmonics play an important role in the formation of complex waveforms, and are commonly found in musical instruments and electronic circuits. Understanding the concept of harmonics is important in fields such as audio engineering, acoustics, and signal processing.

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Due to the lack of information on the frictional force acting on the book, we cannot determine the amount of work done by friction on the book during its displacement to the left by 3.0 m.

In order to find out the work done on a book by friction during a displacement of 3.0 m to the left, we first need to understand the concept of work and friction. Work is defined as the product of the force acting on an object and the distance through which the object is displaced in the direction of the force.

Whereas, friction is the force that opposes the motion of an object due to the contact between the surfaces of the object and its surroundings.

Now, let's assume that a book is placed on a surface and it experiences a frictional force while it is displaced to the left by 3.0 m. Here, we know that the work done by friction is given by the product of the frictional force and the displacement of the book.

However, we need to know the value of the frictional force in order to determine the work done by friction. Due to the lack of information on the frictional force acting on the book, we cannot determine the amount of work done by friction on the book during its displacement to the left by 3.0 m.

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Explanation:

The potential energy of an object has the following formula

         Potential energy = mgh

      where m = mass of the object

                   g = acceleration due to gravity

                   h = height of the object

This means that the potential energy of an object depends upon its mass, acceleration due to gravity, and height.

In the given situation we have a bucket full of water. If the mass and acceleration due to gravity are not changed, the only way the potential energy can be decreased is by reducing the height of the bucket full of water.

This can be done by: -

         (i) Lifting the bucket full of water in such a way that you

             decrease its height as compared to the bench.

        (ii) Put the bucket full of water on a stool whose height is

            lower than the bench.

Answer:

1.By decreasing it's contents- this decreases the weight of the bucket thus decreasing the potential energy of the bucket.

2.By decreasing the height of the bench we have decreased the amount of potential energy stored in the bucket

Answer:

Explanation:

The Horizontal velocity is expressed as:

Vx = -V cos 30

Vx = -150cos30

Vx = -150(0.8660)

Vx = -129.90m/s

The vertical component of the velocity is expressed as:

Vy = V sin 30

Vy = 150sin30

Vy = 150(0.5)

Vy = 75m/s