A carrier wave is an electromagnetic wave that can be modulated, as in frequency, amplitude, or phase, to transmit speech, music, images, or other signals. True/False

Answer:

C

Explanation:

The radius of the circle is equal to 20m if the centripetal acceleration is 5m/s².

The centripetal force is perpendicular to the velocity in a circular motion. If the particles change their speeds in a circular motion then acceleration is produced and the acceleration from directing toward the center.

The mathematical Formula for the centripetal acceleration used:

a = v²/r

Where 'r' is the radius of the circle and a is the centripetal acceleration.

Given, the velocity of the ride, v = 10 m/s

The centripetal acceleration, a = 5 m/s²

The radius of the circle in which the ride is going on is :

r = v²/a

r = (10)²/5

r = 20 m

Therefore, the radius of the circle is equal to 20m.

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For the given current, voltage and time, Power rating of the lamp is 17250 J.

The "pressure" that pushes electricity is referred to as voltage. A voltage is measured in volts (V), and greater voltages result in more electricity flowing to an electrical equipment.

The voltage equation uses the volt standard unit of measurement, which is denoted by the letter "V".

Alternating current (AC) and direct current are the two ways that electric current can flow (DC). The direction in which the electrons travel is the primary distinction between AC and DC. While electrons continuously change directions in AC, moving ahead then backward, they move smoothly in one direction in DC.

The formula to calculate power is -

P=V × I × t

Given, V =  115 V

I =  .50 A

T = 5.0 min ( 1 min = 60sec, 5 mins = 300 sec)

P=115*0.5*300(sec)=17250 J

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Photovoltaic panels are used to produce alternating current using sunlight. It uses solar cells which are photoactive and produce a photoelectric effect and thereby a potential is created.

When photons from the light energy is hit on a metallic surface the photon collides with the electrons of the metals and electrons are ejected from the metal surface. This phenomenon is called photoelectric effect.

In a solar photovoltaic panel, photovoltaic cells layers of semi-conducting materials, such as silicon, are sandwiched photovoltaic cells. When photons from sunshine strike each layer, its unique electronic properties energise and produce an electric field.

The current required to generate electricity is produced through what is known as the photoelectric effect. Electricity produced by solar panels is in the direct current form. This is then transformed into an alternating current by passing via an inverter.

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1.5m/s2

F=ma

a=F/m

a=60/40

a=1.5m/s2

The acceleration of the cart is 1.5 meter per seconds square.

Given the following data:

To find the acceleration of the cart, we would use Newton's Second Law of Motion.

Mathematically, Newton's Second Law of Motion is given by the formula;

\(Acceleration = \frac{Net\; Force}{Mass}\)

Substituting the given parameters into the formula, we have;

\(Acceleration = \frac{60}{40}\)

Acceleration = 1.5 meter per seconds square.

Therefore, the cart's acceleration is 1.5 meter per seconds square.

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Answer:

Average speed = 541.67 mph

Explanation:

The weight of a person on the moon given that the mass of the person on Earth is 105 lbm is 17.3 lbf.

Force is defined as the influence that produces a change in motion of an object. The unit of force is newton (N), which is defined as the amount of force that can accelerate a mass of 1 kg at a rate of 1 meter per second squared (m/s²).

The weight of an object is the gravitational force acting on the object. It is directly proportional to the mass of the object and the acceleration due to gravity. The unit of weight is newton (N).

Formula to calculate weight:

Weight (N) = mass (kg) × acceleration due to gravity (m/s²)

Conversion from lbm to kg:1 lbm = 0.453592 kg

Acceleration due to gravity on the moon is 1.622 m/s².

Therefore, Weight (N) = mass (kg) × acceleration due to gravity (m/s²)

Weight on Earth = 105 lbm

= 47.63 kg

Weight on Moon = 47.63 × 1.622

Weight on Moon = 77.19 N

= 17.3 lbf

Therefore, the weight of a person on the moon given that the mass of the person on Earth is 105 lbm is 17.3 lbf.

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The pressure tendency would likely be growing if "good" weather was on the horizon.

The forecast calls for fair to good weather when the pressure tendency is rising. It is common to expect stormy or inclement weather while the pressure tendency is declining. Clouds and precipitation are linked to low pressure systems because warm air (which holds a lot of water vapour) rises because it is denser than the air above.

High-pressure regions are linked to calmer winds and sunny sky, while low-pressure regions are frequently connected with unfavourable weather (such as gloomy, windy, with potential for rain or storms).

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In an open system, both energy and matter are exchanged with the surroundings.

In a closed system, only energy is exchanged with the surroundings.

In an isolated system, neither matter nor energy is exchanged with the surroundings.

In the greenhouse, only energy is exchanged with the surroundings.

Thus, the greenhouse is a closed system.

Answer:

1.A

2.C

3.B

4. i.dk about that one

Explanation:

1. It is true that Tracking your exercise can help you stick with an exercise routine.

2. Yes, it is best to do as many different kinds of exercise as possible.

3. Building muscle strength helps with all aspects of fitness

4. Yoga would be the best exercise to achieve this goal.

Exercise is any activity that utilizes the physical movements of the body that improves a people's health, endurance, and wellbeing while lowering their chance of contracting illnesses. It enables the person to keep their body weight in a healthy weight range.

The benefits of fitness fluctuate depending on the sort of dying a person experiences. Even if a muscle is stretched, excessive sitting can cause a number of illnesses, many of which are fatal. The individual should engage in mobility activities as well as exercising to improve their stamina.

Thus, exercise is very necessary for health.

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Answer:

1-G

2-E

3-A

4-C

5-F

6-D

7-H

8-B

Answer:

63.0 x (6.02 x 10^23) = 3.79 x 10^25 atoms of gold

Explanation:

There are 6.02 x 10^23 representative particles in a mole of any substance. Multiply it by the number of moles, and you will get the number of representative particles (atoms, molecules, formula units)

Similar like magnets, opposites are drawn together. A magnet's north pole will adhere to another magnet's south pole. However, a magnet's north pole will push away from another magnet's north pole.

When two diametrically opposed poles combine, the same logic applies. The magnets are compelled to come together because of the intense attraction.

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The speed at the end of a 400 m run, starting from rest and accelerating at a constant rate of 1.47 m/s^2, is 10.4 m/s.

To find the final speed, we need to use the kinematic equation: vf^2 = vi^2 + 2ad, where vf is the final velocity, vi is the initial velocity (which is zero in this case), a is the acceleration (given as 1.47 m/s^2), and d is the distance (given as 400 m).

Solving for vf, we get vf = sqrt(2ad) = sqrt(2 x 1.47 m/s^2 x 400 m) = 10.4 m/s. Therefore, the speed at the end of the 400 m run, starting from rest and accelerating at a constant rate of 1.47 m/s^2, is 10.4 m/s.

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According to Archimedes' principle, the volume of the liquid displaced when the body is totally immersed in the liquid is equal to the volume of the body.

The volume of the body is equal to the volume of the immersed portion.

Thus, the volume of the liquid displaced is equal to the volume of the immersed portion of the body.

Hence, option B is the correct answer.

Answer:

6.4 Joules

Explanation:

For springs, Hooke's law states that;

F = ke

where F is a force applied, e is the extension and k is the spring constant.

Work done in a spring is the same as the potential energy stored in the spring. So that;

Work done = \(\frac{1}{2}\) k\(e^{2}\)

e = \(x_{2}\) - \(x_{1}\)

\(x_{2}\) = 4 cm = 0.4 m

\(x_{1}\) = 0

So that,

\(x_{2}\) - \(x_{1}\) = 0.4 m

Thus,

Work done = \(\frac{1}{2}\) x 80 x \((0.4)^{2}\)

                   = 40 x 0.16

                   = 6.4

Work done = 6.4 J

The work done by the force on the spring is 6.4 Joules.

The maximum current in the inductor is approximately 1.21 amperes when a 5.05 μF capacitor initially charged to 15.2 V is connected in series with a 3.75 mH inductor.

To determine the maximum current in the inductor when a 5.05 μF capacitor initially charged to a potential of 15.2 V is connected in series with a 3.75 mH inductor, we can use the formula for the resonant frequency of an LC circuit.

The resonant frequency (fr) of an LC circuit is given by:

fr = 1 / (2π√(LC))

Given:

C = 5.05 μF = 5.05 × \(10^{-6}\)F

L = 3.75 mH = 3.75 × \(10^{-3}\) H

Plugging the values into the formula:

fr = 1 / (2π√(5.05 × \(10^{-6}\) × 3.75 × \(10^{-3}\)))

  = 1 / (2π√(1.89125 ×\(10^{-8}\)))

  ≈ 530,012 Hz

The maximum current (Imax) in the inductor can be calculated using the formula:

Imax = V / Xl

Where:

V is the initial potential (voltage) across the capacitor (15.2 V), and

Xl is the inductive reactance.

The inductive reactance (Xl) is given by:

Xl = 2πfL

Plugging the values into the formula:

Xl = 2π(530,012)(3.75 × \(10^{-3}\))

  ≈ 12.556 Ω

Plugging the values into the formula for Imax:

Imax = 15.2 V / 12.556 Ω  ≈ 1.21 A

Therefore, the maximum current in the inductor is approximately 1.21 amperes.

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Answer:

V=3.57 × 10^6 m/s

hope it is helpful..

The speed of the proton in the magnetic field is 3.57×10⁶ m/s.

To determine the speed of the proton, we need to know about the magnetic force experienced by a charged particle in a magnetic field.

               F=q×v×B

  where, q= charge of the particle

              v= speed of the particle

              B= magnetic field

       v=F/(q×B)

                  F=2.40×10⁻¹⁴N

                  q= 1.6×10⁻¹⁹C

       Then, v= 2.40×10⁻¹⁴/ ( 4.20×10⁻²× 1.6×10⁻¹⁹)

                   = 3.57×10⁶ m/s.

Thus, we can conclude that the speed of the proton in the magnetic field is 3.57×10⁶ m/s.

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The side to side motion of a star due to gravitational tugs from an unseen planet is a method known as radial velocity or Doppler spectroscopy.

This technique works by measuring the tiny shifts in the star’s spectral lines that are caused by the gravitational pull of the planet as it orbits around the star. As the planet moves closer to the observer, the star’s light is blue-shifted, and as it moves away, the star’s light is red-shifted.

By measuring these small shifts in the star’s light, astronomers can calculate the planet’s orbital period and its minimum mass. This method is especially useful for detecting exoplanets that orbit close to their host star, as the gravitational tug from these planets has a more pronounced effect on the star’s radial velocity.

Additionally, because this method measures the star’s velocity, it is able to detect planets regardless of their albedo or atmosphere.

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Answer:

to heat spaces in buildingss

Explanation:

Answer:

your body is exerting a force on the chair and nothing is happening

Explanation:

Answer:

the second one

Explanation:

as you sit down you are using gravitational force which is pulling straight down but as you sit down there are currently no forces in motion while sitting

The prove of  Angle XYZ- Angle NYM is given below:

Note that from the image given;

Since ∠XYZ is said to be congruent to ∠NYM it can be proven by the use of the reflexive property.

The reflexive property is one that informs that any shape is regarded congruent to itself.

Since ∠NYM has a different way to call ∠XYZ that uses a different vertexes, but the sides are made up of the two angles which are said to be the same.

Therefore , ∠XYZ ≡ ∠NYM are proved by the reflexive property.

Since ΔXYZ is the same with Δ NYM, it can be proven by the AA (angle-angle) similarity theorem.

We have 2 angles Δ XYZ and Δ NYM:

Note that ∠YXZ ≡ ∠YNM

              ∠XYZ ≡ ∠NYM

So,  ΔXYZ is said to be the same to ΔNYM and it is proven by the AA similarity theorem.

Therefore, The prove of  Angle XYZ- Angle NYM is given below:

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Answer:

1. parrael

2. corresponding angles theorem

3. NYM

4. AA

Explanation:

just took it

For this problem, lets use the kinetic energy formula

Where m is equal to mass and v is equal to velocity

In our given, we have:

velocity = 60 m/s

kinetic energy = 6,025,000 J

Plug these numbers into the formula to get the mass

m = 3347.222 kg

Answer:

Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant.

In this state, Kinetic energy is equal to half of the product mass and velocity. SI unit is joules. So it's if the mass is doubled then the kinetic energy also gets doubled.

The speed of the water in the second part of the pipe is 76 m/s.

According to the principle of conservation of mass, the mass of water flowing through the pipe will remain constant. As the pipe contracts, the speed of the water will increase to maintain this principle. We can use the equation of continuity to solve for the speed of water in the second part of the pipe.
The equation of continuity states that the product of the cross-sectional area and the speed of the fluid is constant along the length of the pipe. Mathematically, we can express it as A1v1 = A2v2, where A1 and v1 are the cross-sectional area and speed of the water in the first part of the pipe, and A2 and v2 are the cross-sectional area and speed of the water in the second part of the pipe.
Substituting the given values, we get:
1.4 x 15.2 = 0.280 x v2
v2 = (1.4 x 15.2) / 0.280
v2 = 76 m/s (rounded to two decimal places)
Therefore, the speed of the water in the second part of the pipe is 76 m/s.

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Answer:

a is the correct answer

Explanation:

period T=1/f

where f=60hertz

then T= 1/60 which give 0.01666666 but putting it in standard form and rounding up give 1.7×10^-2

Answer:

a solid made of liquid solution

Explanation:

a trumpet for example has intrcuite valves , the only way to do this is by creating a liquid form of the metal to be able to create the solid formed instrument.

Answer:

a solid made of liquid solution

Explanation:

domne

The racket applies an average acceleration of

\(a_{\rm ave} = \dfrac{\Delta v}{\Delta t} \\\\ a_{\rm ave} = \dfrac{40\frac{\rm m}{\rm s} - \left(-30\frac{\rm m}{\rm s}\right)}{5.2\,\rm ms} = \dfrac{40\frac{\rm m}{\rm s} - \left(-30\frac{\rm m}{\rm s}\right)}{0.0052\,\rm s} = 13,461.5\dfrac{\rm m}{\mathrm s^2}\)

(Note that I'm taking the initial direction of the ball's motion to be negative.)

Then the average force exerted on the ball is

\(F_{\rm ave} = ma_{\rm ave} \\\\ F_{\rm ave} = (58.0\,\mathrm g)a_{\rm ave} = (0.058\,\mathrm{kg})a_{\rm ave} \approx \boxed{780\,\mathrm N}\)