since you are made mostly of water, you are very efficient at absorbing microwave photons. if you were in intergalactic space, how many cmb photons would you absorb per second? (the assumption that you are spherical will be useful.) what is the rate, in watts, at which you would absorb radiative energy from the cmb?

Answer:

ans: 13.53 × 10^17 Newton

Answer:

1.0x10^7 Pa or 1,460 psi.

Explanation:

2000N is applied to an area of (0.02m)*(0.01m).  Pressure is in units of N/m^2.  1 N/m^2 is 1 Pascal (Pa).

 (2000N)/(0.002 m^2) = 1.0x10^7 Pa

This is equal to 1,460 psi

Answer:

increasing; speeding up is my answer

An appropriate value for the resistance in parallel with the smoothing capacitor would be 1.59 kΩ.

To ensure good tracking of the AM envelope, the resistance in parallel with the smoothing capacitor should be low enough to discharge the capacitor quickly during the troughs of the modulated signal, but high enough to avoid discharging it too quickly during the peaks of the signal.

The time constant (τ) of the RC circuit formed by the smoothing capacitor and the parallel resistance is given by the formula:

τ = RC

where R is the resistance and C is the capacitance.

To determine an appropriate value for the resistance, we need to calculate the time constant and compare it to the period of the modulated signal.

The period of a 500 kHz signal is T = 1/f = 2 μs. The modulating signal has a bandwidth of 5 kHz, which means its period is 200 μs.

Assuming a small signal approximation, we can use the formula for the time constant to calculate an appropriate value for the resistance:

τ = 20 nF × R = T/2π = 31.8 ns

Solving for R, we get:

R = τ/C = 31.8 ns / 20 nF = 1.59 kΩ

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Complete question is:

The input signal into an envelope detector is an am signal of carrier frequency 500 khz. the envelope detector employs a smoothing capacitor of 20 nf. the modulating signal has a bandwidth of 5 khz. specify an appropriate value for the resistance in parallel with the smoothing capacitor for a good tracking of the am envelope.

Answer:

Valence electrons are electrons that tend to stay in the highest energy levels of an atom and are involved in chemical bonding.

Answer:Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond contribute one valence electron in order to form a shared pair. ... Most atoms do not have eight electrons in their valence electron shell.

Explanation:

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Answer: The maximum displacement the spring is stretched or compressed from its equilibrium position is its AMPLITUDE.

Explanation:

In simple harmonic motion, the restoring force which pulls the oscillating body back towards its rest position is proportional in magnitude to the displacement of the body from the rest position.

The simple harmonic motion in terms of MASS AND SPRING, simple pendulum and loaded test tube is the motion or movement of a particle in a to and fro movement along a straight line under the influence of force.

Mass and spring: This means when a string of suspended mass, M, with initial level of the spring is at rest, the spring will start moving upward and downward due to the imbalance of the suspended mass.

The maximum displacement as the spring is stretched or compressed from its equilibrium position is its AMPLITUDE. This is measured in units of meter.

Answer:

Option C. 4.5×10¯² N

Explanation:

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

Charge 1 (q₁) = +5×10¯⁶ C

Charge 2 (q₂) = –4×10¯⁶ C

Distance apart (r) = 2 m

Electrical constant (K) = 9×10⁹ Nm²/C²

Force (F) =?

The magnitude of the force can be obtained as follow:

F = Kq₁q₂ / r²

F = 9×10⁹ × 5×10¯⁶ × 4×10¯⁶ / 2²

F = 0.18 / 4

F = 0.045

F = 4.5×10¯² N

Thus, magnitude of the force is 4.5×10¯² N

The current through wet hands when in contact with a 120 V electrical circuit would be 120 milliamps (mA).

Voltage (V) = 120 V

Resistance (R) = 1,000 ohms

According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them. According to Ohm's Law, we can compute the electrical current in a circuit by dividing the voltage by the resistance. If the resistance is reduced, the current will alter.

Calculating the current by using Ohm's law -

I = V / R

Substituting the values:

I = 120 / 1,000

= 0.12 A

Converting 0.12 A to milliamps by multiplying by 1,000 -

= 0.12 x 1,000

= 120

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Answer:

The speed of the bus moving at a speed of 45 km/h in m/s is (a) 1.25 x \(10^{1}\) m/s.

Explanation:

What is speed?

Speed is defined as the distance covered by a moving body in unit time (that is 1 s, 1 minute, or 1 h).

The bus is moving at a speed of 45 km/h.

i.e, in 1 hour, the bus moves a distance of 45 km.

Since 1 hour = 60 minutes and 1 km =  \(10^{3}\) m, so, we may say that

In 60 minutes the bus moves a distance of 45 x \(10^{3}\) m.

Since 1 minute = 60 seconds,

So 1 hour = 60 x 60 s = 3600 s. Thus,

In 3600 s, the bus moves a distance of 45 x \(10^{3}\) m.

In 1 s, the bus moves a distance of  \(\frac{45 * 10^{3} }{3600} m\)

Simplifying the expression we get,

The bus moves at a speed of 12.5 m/s or 1.25 x \(10^{1}\)m/s.

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Answer:

1530.4?

Explanation:

1500.0

+030.4

1530.4

Explanation:

D = M/V

We rearrange this equation to get V = M/D

So 14 g/7 g/mL,

the grams cancel out, and we're left with 2 mL.

D is the answer.

The volume of water displaced by the body is 2 ml.

Volume of a body is amount of space occupied by a body. As it has only magnitude (no direction), it is a scalar quantity. SI unit of volume is \(m^{3}\).

Now, it is given that,

Mass of the object  is 14 grams.

Density of the object is 7 g/ml.

So, volume of the object will be = (mass of the object)/(density of the object)

= 14 grams/(7 g/ml).

= 2 ml.

When the object is placed in water, it sinks. That's why, volume of water displaced by it is equal to the total volume of the body.

Hence, The volume of displaced water is 2 ml.

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Explanation:

The Sun is the center of the solar system. What is the Sun? Earth's Sun may seem different to us, but it is a star like all the other stars located outside the solar system.

Answer:

A- The image of the moon on the waters surface is distorted.

Explanation:

The most energy-efficient and quickly evolving type of lighting technology available today is the light-emitting diode (LED). High-quality LED bulbs outperform other types of illumination in terms of lifespan, toughness, and light quality.

A typical incandescent source emits around 2% of its energy as usable visible light and the rest 98% as waste heat. Incandescent light bulbs are prone to burning out frequently and need to be replaced annually.

Incandescent light bulbs use electric current to heat a filament until it begins to emit electromagnetic radiation, which is how they turn electricity into light. Because to the filament's high resistance, as current flows through it, its temperature rises until it lights.

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The speed of the river is 0.5 Km/hr

Let X be the speed of the boat.

Let Y be the speed of the river.

Downstream speed

X - Y = 4

Upstream speed

X + Y = 5

By solving, we get

2X = 9

X =  4.5 Km/hr

Y =  0.5Km/hr

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Answer:

.

The common velocity of the two bodies after the collision is 2.7 m/s.

This can be calculated using the equation of conservation of momentum:

m1v1 + m2v2 = (m1 + m2)v

where m1 is the mass of the first body (12 kg), v1 is the velocity of the first body (4.2 m/s), m2 is the mass of the second body (18 kg), v2 is the velocity of the second body (0 m/s), and v is the common velocity of the two bodies after the collision.

Substituting the given values into the equation, we get:

12(4.2) + 18(0) = (12 + 18)v

Solving for v, we get:

v = 2.7 m/s

The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Answer:

1) C, 2) C, 3) B, 4) D, 5) A/B, 6) D, 7) D, 8) A, 9) B, 10) A

Explanation:

1) Seconds, minutes and days are time units. (Correct answer: C)

2) The displacement is shortest distance between the point of origin and the point of destination. (Correct answer: C)

3) The velocity is the rate of change of position in time. (Correct answer: B)

4) Graphs are a very useful ressource to infer characteristics inherent to a studied physical variable. (Correct answer: D)

5) There are two possible answers, since both milimeters and meters are units for distance. (Correct answers: A/B)

6) The distance is the arc length of the entire path that object travelled. (Answer: D)

7) Traditionally, in a position vs. time graph we plot time in the x-axis. (Answer: D)

8) In this case, we use a distance-time graph, where travelled distance is the dependent variable and time is the independent variable. (Answer: A)

9) The point of origin is the initial position of the object. (Answer: B)

10) The point of destination is the final position of the object. (Answer: A)

A changing electric field is induced by changing magnetic field.

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. Electric charges in motion create magnetic fields. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field. Tesla is the magnetic field intensity unit in the International System (SI) (T). The region around a magnet where the magnetic force manifests itself is known as the magnetic field. Electrical charges can move and create magnetic fields.

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Answer:

Several cm of lead

Explanation:

Answer:

220÷4=550 per hour

2.4.3 550×4=2200

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An element of atomic number 88 decays radioactively to an element of atomic number 82. The emissions that achieve this result is one alpha particle. The correct option is D. The emission that achieves this result is one alpha particle. The correct option is C.

To determine the emissions that achieve the radioactive decay from an element with atomic number 88 to an element with atomic number 82, we need to consider the changes in atomic number and mass number during the decay process.

In a radioactive decay, the atomic number decreases by the emission of a particle, and the mass number decreases by a specific amount as well.

Atomic number of initial element = 88

Atomic number of final element = 82

From this information, we can conclude that the decay process involves the emission of an alpha particle.

The emission of an alpha particle corresponds to the emission of a helium nucleus, which consists of two protons and two neutrons. This emission reduces the atomic number by 2 and the mass number by 4.

Therefore, the emission that achieves this result is C, one alpha particle.

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Answer:

A. Measurements are made with tools; observations are not

Explanation:

Measurement: the assignment of numbers or codes according to prior-set rules.

Observation: data from an individual study subject or sampled unit.

Measurement error: differences between "true" answers and what appears on data collection instruments

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The velocity of the car when it began coasting was approximately 17.2 m/s.

If a car is coasting without any external force acting on it (such as friction), then its initial kinetic energy is converted entirely into potential energy as it moves uphill. Therefore, we can use the principle of conservation of energy to solve this problem.

The principle of conservation of energy states that the total energy of a closed system (in this case, the car and the Earth) remains constant over time. Therefore, the initial kinetic energy of the car is equal to the potential energy gained as it moves uphill. Mathematically, we can express this as:

1/2 mv^2 = mgh

where:

m = mass of the car

v = initial velocity of the car when it began coasting

g = acceleration due to gravity (9.8 m/s^2)

h = height gained by the car (15 m)

We can simplify this equation by canceling out the mass (m) on both sides:

1/2 v^2 = gh

Substituting the given values, we get:

1/2 v^2 = 9.8 m/s^2 * 15 m

v^2 = 2 * 9.8 m/s^2 * 15 m

v = √(2 * 9.8 m/s^2 * 15 m)

v ≈ 17.2 m/s

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When you push a pencil off your desk, the energy transformation that takes place is that potential energy transforms into kinetic energy.

The correct answer to the given question is option C.

Potential energy is the energy stored within an object because of its position or configuration.

In this scenario, the pencil has potential energy because of its elevated position on the desk. When the pencil is pushed off the desk, it begins to move, which means that it has kinetic energy. Kinetic energy is the energy of motion.

As the pencil falls off the desk, its potential energy is transformed into kinetic energy, which is the energy that results from its motion. The faster the pencil falls, the greater its kinetic energy will be because kinetic energy is directly proportional to the square of an object's velocity.

Therefore, when you push a pencil off your desk, the potential energy that it has because of its elevated position is transformed into kinetic energy as it falls towards the ground.

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Jill would measure the meter stick to be approximately 0.959 meters long while she is traveling at a speed of 0.280c according to special relativity.

According to special relativity, when an object is moving at a significant fraction of the speed of light, length contraction occurs. This means that the length of an object in motion appears shorter to an observer in another reference frame.

In this case, Jill is traveling at a speed of 0.280c relative to an observer on Earth. To calculate the length contraction, we can use the Lorentz contraction formula:

L' = L * √(1 - (v^2/c^2))

L' is the measured length (in the spaceship's frame of reference)

L is the rest length (length of the meter stick on Earth)

v is the relative velocity (0.280c)

c is the speed of light

Assuming the rest length of the meter stick is 1 meter (L = 1 m), we can substitute the values into the formula:

L' = 1 m * √(1 - (0.280c)^2/c^2)

L' = 1 m * √(1 - 0.0784)

L' = 1 m * √(0.9216)

L' ≈ 0.959 m

Therefore, Jill would measure the meter stick to be approximately 0.959 meters long while she is traveling at a speed of 0.280c.

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