What does it mean when someone says that radio waves can be modulated?

Given :

A wrecking ball of mass 500 kg hangs form a crane by a cable of length 25 m

this wrecking ball is released from an angle of 40 degrees.

To Find :

The height  from the lowest point of the arc.

Solution :

From the attached image we have to find the value of  h.

So,

\(cos \ 40^o = \dfrac{L-h}{L}\\\\0.76=\dfrac{25-h}{25}\\\\h = 25( 1- 0.76)\\\\h = 6 \ m\)

Hence, this is the required solution.

Answer:

-1.02 m/s²

Explanation:

The average acceleration of the train while stopping can be calculated using the formula: acceleration = (final velocity - initial velocity) / time. The initial velocity of the train is 22.9 km/h, which is equivalent to 6.36 m/s. The final velocity is 0 m/s since the train comes to a stop. The time taken to stop is 6.24 s. Plugging these values into the formula, we get: acceleration = (0 - 6.36) / 6.24 = -1.02 m/s².

So, the average acceleration of the train while stopping is -1.02 m/s².

The molar mass of the unknown gas is 17.15 g/mol.

The rate of effusion of a gas is directly proportional to the average speed of its molecules, which is inversely proportional to the square root of its molar mass. Therefore, we can use the following equation to relate the effusion rates of two gases:

Rate1/Rate2 = sqrt(ℳ2/ℳ1)

where Rate1 and Rate2 are the effusion rates of gases 1 and 2, and ℳ1 and ℳ2 are their molar masses.

In this problem, we are given that the effusion rate of argon is 0.653 times that of an unknown gas. Let's denote the molar mass of the unknown gas by ℳu. Then, we have:

Rate(Ar)/Rate(u) = 0.653

Using the equation above, we can solve for ℳu:

sqrt(ℳu/39.948) = Rate(Ar)/Rate(u) = 0.653

ℳu/39.948 = (0.653)^2

ℳu = 0.653^2 * 39.948 = 17.15 g/mol

Therefore, the molar mass of the unknown gas is 17.15 g/mol.

For such more questions on mass

https://brainly.com/question/831230

#SPJ11

Answer:

the angular acceleration of the gate is approximately 1.61  \(\frac{rad}{s^2}\)

Explanation:

Recall the formula that connects the net torque with the moment of inertia of a rotating object about its axis of rotation, and the angular acceleration (similar to Newton's second law with net force, mass, and linear acceleration):

\(\sum \tau_1=I\,\alpha\)

In our case, both forces contribute to the same direction of torque, so we can add their torques up and get the net torque on the gate:

\(\tau_{net}=(20*2+30*3.5) \,N\,m=145\,\,N\,m\)

Now we use this value to obtain the angular acceleration by using the given moment of inertia of the rotating gate:

\(\sum \tau_1=I\,\alpha\\145\,\,N\.m=(90\,\,kg\,m^2)\,\alpha\\\alpha= \frac{145}{90} \frac{rad}{s^2} = 1.61\, \frac{rad}{s^2}\)

Considering the definition of weight, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.

Mass is the amount of matter that a body contains and weight is the action exerted by the force of gravity on the body.

The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.

The weight is calculated as the product of the mass of the object and the value of the gravitational acceleration or gravity:

Weight= mass× gravity

The value of the acceleration constant on Earth is 9.8 m/s². The weight is proportional to the mass of the object. The unit of weight is expressed in Newton (N).

In this case, you know:

Replacing on the definition of weight:

Weight= 180 kg× 9.8 m/s²

Solving:

Weight= 1764 N

Finally, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.

Learn more about weight:

https://brainly.com/question/17490356

#SPJ1

Answer:

put a magnet on a conductive surface

Answer:

An egg with a thick shell.

Explanation:

Hope this helps.

Answer:

100 m/s^2

Explanation:

F=ma

50 g = 0.05 kg

5 = 0.05a

a=100m/s^2

Answer:

100MS

Explanation:

I did the test and got 100%

When a knowledgeable amateur astronomer tells you that she has a 14-inch telescope, the number 14 refers to the diameter of the telescope’s objective lens.

A telescope is a device used to view distant objects by utilizing electromagnetic radiation to either magnify their apparent size or gather more light than the human eye can. Telescopes are used for scientific, commercial, and amateur purposes. The telescope comprises an objective lens or mirror and an eyepiece to magnify the images created by the objective. Most telescopes have a viewfinder to make it simpler to aim the telescope precisely at the object of interest. They may also have a motorized mount to track celestial objects as they move across the sky.

Telescopes come in a variety of sizes, designs, and shapes and they range from large observatory telescopes to handheld amateur models. They are often classified into two types, reflecting and refracting telescopes and the size of a telescope is determined by the diameter of its objective lens or mirror. The bigger the diameter, the more light the telescope can collect, and the clearer the image. The diameter of the objective is the most significant aspect of a telescope when it comes to observing the heavens. For instance, a 14-inch telescope has an objective lens with a diameter of 14 inches, this large lens is capable of collecting a lot of light and providing clear images, making it a perfect tool for viewing the night sky.

Learn more about telescope at:

https://brainly.com/question/3841719

#SPJ11

if the robot accelerates along the rope, the direction of acceleration that increases the tension in the rope is the same direction as the tension in the rope.

Force is defined as an object which is in a state of motion then its rate of change of momentum is called force.

Here,
If a robot accelerates along a rope, the tension in the rope will increase if the acceleration is in the same direction as the tension in the rope. This can be understood using Newton's second law of motion, which states that the force (F) applied to an object is equal to its mass (m) multiplied by its acceleration (a),

F = ma

In this case, the robot is connected to the rope, and the tension in the rope is the force acting on the robot. If the robot accelerates in the same direction as the tension, the force (tension) will increase, because the mass of the robot remains constant. On the other hand, if the robot accelerates in the opposite direction to the tension, the force (tension) will decrease, because the mass of the robot remains constant.

Therefore, if the robot accelerates along the rope, the direction of acceleration that increases the tension in the rope is the same direction as the tension in the rope.

Learn more about force here:

https://brainly.com/question/26115859

#SPJ1

It takes around 100,000 years for photons to emerge from the Sun's core to the outside.

Photons are the elementary particles that make up light. In the Sun's core, nuclear fusion reactions produce high-energy photons, which are continually absorbed and re-emitted by the atoms in the dense plasma. These photons interact with other particles in the plasma, making their journey to the surface a slow and indirect process.

It takes a photon around 100,000 years to travel from the Sun's core to the outside. This is due to the high density and opacity of the Sun's interior, which causes the photons to undergo a random walk through the plasma, bouncing off atoms and being absorbed and re-emitted many times before they finally reach the surface. Once the photons reach the surface, they can escape into space and travel to Earth in just over 8 minutes. The process of photons escaping from the Sun's core and eventually reaching Earth is a crucial part of the solar energy that sustains life on our planet.

Learn more about the sun's core, below:

https://brainly.com/question/6443073

#SPJ11

The generalization that can be made about the relative speeds that the sun and the stars move through the sky over the course of a day is that the sun appears to move much slower than the stars. This is because the sun is much closer to Earth than the stars, so its movement is more noticeable.

The stars, on the other hand, are much farther away and their movement is less noticeable.

Another way to think about this is to consider the fact that the Earth is rotating on its axis. As the Earth rotates, the sun appears to move across the sky at a relatively slow speed because it is close to Earth. The stars, however, are much farther away and their movement is not as noticeable. This is why the stars appear to move much faster than the sun over the course of a day.

To know more about stars refer here:

https://brainly.com/question/7379319#

#SPJ11

The intensity reflection coefficient (irc) is 1.

The ratio of the intensity of the reflected wave to the incident (transmitted) wave is known as the intensity reflection coefficient.

Intensity of incident (transmitted) sound wave = 50 W/cm².

As it  is totally reflected,  intensity of the reflected sound  wave = 50 W/cm².

Hence,  intensity reflection coefficient =

intensity of the reflected sound wave ÷ Intensity of incident sound wave

= 50  W/cm² /  50 W/cm².

= 1.

Learn more about reflection coefficient here:

https://brainly.com/question/28145974

#SPJ4

Answer:

I'm not sure if the directions affect the speed tho

but I think it's 4? cause it's the speed relative to the ground

hope this helps:))

Answer:

False

Explanation:

I took the test  and true was incorrect so the answer is false

hope this helps

Answer:

False

Explanation:

False. A high gear ratio = less speed = more force

(a) The frequency observed by car B's driver when car B is moving east at 78 mph and is behind car A is higher than the original frequency of 638 Hz.

When car B is behind car A, both cars are moving in the same direction. In this case, the relative velocity between the cars is the difference between their individual velocities, which is 78 mph (since car B is moving at 78 mph and car A is moving at 63 mph).

As car B moves closer to car A, the frequency observed by car B's driver is given by the formula:

f_observed = (f_source * (v_sound + v_observer)) / (v_sound + v_source)

where:

f_observed is the observed frequency,

f_source is the source frequency (638 Hz in this case),

v_sound is the speed of sound,

v_observer is the velocity of the observer (car B), and

v_source is the velocity of the source (car A).

Since car A is moving away from car B, the sign of v_source is negative. Plugging in the values, we have:

f_observed = (638 Hz * (v_sound + 78 mph)) / (v_sound - 63 mph)

Since we don't know the speed of sound, we can't calculate the exact frequency observed. However, we can conclude that the frequency observed will be higher than the original frequency of 638 Hz due to the positive velocity term (78 mph) in the numerator and the negative velocity term (63 mph) in the denominator.

To know more about speed of sound, refer here:

https://brainly.com/question/32259336#

#SPJ4

Answer:

4b: comets

5a: supercluster

5b: they just changed 4b's solar system for milky way. I think it is still comets. if not, then just say black holes.

Answer:

A? what do you mean? ahhahhhhahhahahahahahahahhahahahahaaa

Answer:

the minimum frequency of ultrasound that will allow you to see the details is 1.92 x 10⁶ Hz.

Explanation:

Given;

wavelength, λ = 0.802 mm = 0.802 x 10⁻³ m

speed of sound in human tissue, v = 1540 m/s

The minimum frequency of ultrasound that will allow you to see the details is calculated as;

\(f = \frac{v}{\lambda} \\\\f = \frac{1540}{0.802 \times 10^{-3}} \\\\f = 1.92 \ \times \ 10^6 \ Hz\)

Therefore, the minimum frequency of ultrasound that will allow you to see the details is 1.92 x 10⁶ Hz.

Given that the balloon is negatively charged and it is touching a wooden wall, the ballon will perform all the actions given in the answer choices.

A negatively charged balloon will pull positive charge on the wall surface towards it, since opposite charges attract each other.

Also, the negatively charged balloon touching a wooden wall will push any negative charge in the wall away from it. This is because like charges repel each other.

The negatively charged balloon also polarizes the molecules on the wall. This is because in molecules, atoms are bonded together since protons in one atom attract the electrons in the cloud of another atom.

Therefore, the correct choice is All of the above

ANSWER:

All of the above

The graph can be used to obtain the speed of the snail at any instant.

A distance time graph is a graph in which the distance is indicated in the vertical axis and the time is indicated on the horizontal axis. We can use this plot to determine;

Now, the question is incomplete but the graph can be used to obtain the speed of the snail at any instant.

Learn more about speed: https://brainly.com/question/7359669

The mass of an object that requires 15.0N to accelerate it at rate of 3 m/s² is 1.17 kg.

The mass of an object is the quantity of matter present in an object.

The mass of an object is related to its acceleration and the applied force by the given formula below:

force = mass * acceleration

mass = force/acceleration

From the data provided:

force applied = 15.0 N

acceleration = 3 m/s²

The force applied overcomes the weight of the body.

Total force applied = weight + net force

Total force = mg + ma

Total force = m(g + a)

m = force/(g + a)

mass = 15(9.8 + 3)

m = 1.17 kg

Therefore, the mass of the object is 1.17 kg.

Learn more about mass and acceleration at: https://brainly.com/question/25545050

#SPJ1

Answer:

Sorry for being late. Hope this helps

Explanation:

No, in uniform circular motion, the magnitude of the position vector with respect to the center of rotation dose not change. Since the radius of a circle is same in all directions, the magnitude of the position vector in a uniform circular motion with respect to the center of rotatation does not change.

We talked about motion in a circle with constant speed and, consequently, constant angular velocity in the section on uniform circular motion. Nevertheless, rotational motion can occasionally speed up, slow down, or reverse directions, thus angular velocity is not always constant. When a person on a spinning skateboard pulls in her arms, when a youngster pushes a merry-go-round to make it revolve, or when a CD slows to a stop when it is turned off, the angular velocity is not constant. In each of these scenarios, the angular velocity varies, causing angular acceleration. The angular acceleration increases with the rate of change. The rate at which angular velocity changes is known as angular acceleration.

To learn more about rotational motion :

https://brainly.com/question/12995374

#SPJ4

two wires carry equal and opposite currents, as shown in the figure. at a point directly between the two wires, the field is zero.

Current is a flow of charges. it is denoted by i and expressed in ampere A. Mathematically it is expressed as i = q/t, where q is the amount of charge and t is time. Current is nothing but amount of charges flown in the unit time in the electric wire. Charge is expressed in coulomb C and time in second s. hence coulomb per second (C/s) is ampere A. Charge on electron is 1.60217663 × 10⁻¹⁹ which is called as elementary charge.

There are two types of the current, Convectional current and non-conventional current. Convectional current is the current flows from positive to negative. Non convectional current flows from negative to positive. Note that flow of electrons is from negative to positive. Hence direction of flow of conventional current is from positive to negative charge has field around it..

To know more about Current :

https://brainly.com/question/2264542

#SPJ1.

Answer:

Explanation:

The properties of magnets are used to make electricity. Moving magnetic fields pull and push electrons. ... Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current.

When there are balanced forces acting on a moving object, the object will continue to move with a constant velocity. This means that the object's speed and direction will remain unchanged.

Balanced forces are forces that have equal magnitude and opposite direction, canceling each other out and resulting in a net force of zero. When there are balanced forces acting on a moving object, it will continue to move with a constant velocity, as the forces cancel each other out and result in a net force of zero. The object will experience no acceleration and will maintain its current state of motion.

To know more about Balanced forces , here

brainly.com/question/30030881

#SPJ4

Answer: the motion of the object they are acting on remains unchanged

Explanation:

When the forces acting on an object have equal strength and act in opposite directions, they are balanced. These forces cancel out one another. Resulting in the object not moving.

The energy and power of the complex signal x[n] = re^(jπ/4)n can be determined by analyzing its mathematical properties.

To find the energy and power of the complex signal x[n] = re^(jπ/4)n, we need to evaluate the given expression. Let's break it down step by step. Here, "re" represents a real constant and "j" denotes the imaginary unit.

The signal x[n] = re^(jπ/4)n can be written as x[n] = r * 3^(n) * e^(jπn/4). The term r * 3^(n) is a geometric progression that grows or decays depending on the value of r. The exponential term e^(jπn/4) represents a rotating phasor with a phase angle of π/4.

To calculate the energy, we need to find the sum of the squared magnitudes of each sample of the signal over all time indices. Since the magnitude of e^(jπn/4) is constant (equal to 1), the energy of x[n] is proportional to the sum of the squared magnitudes of r * 3^(n). Depending on the value of r, the energy may vary.

The power of a discrete-time signal is the average energy per unit time. In this case, since the signal is defined in discrete-time, the power is determined by dividing the energy by the total number of samples in the signal.

In conclusion, to determine the energy and power of the complex signal x[n] = re^(jπ/4)n, we need to analyze the geometric progression component and consider the constant term r. The energy depends on the sum of squared magnitudes of r * 3^(n), while the power is calculated by dividing the energy by the total number of samples in the signal.

Learn more about complex signal here:

https://brainly.com/question/1932868

#SPJ11

Answer:

C is correct

Explanation:

The statement that best describes how the phase of the Moon changes from a full moon to a new moon is as follows:

Thus, the correct option for this question is C.

The different phases of the moon may significantly include the new Moon, waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, third quarter, and waning crescent. This cycle of phase change of the moon repeats once a month.

The Earth completes its one rotation around the sun in 365.25 days. While the moon completes its one rotation around the Earth in 29.5 days.  The rotation of the moon around the earth leads to phase change of it. This is because when the moon rotates around the sun, it directly or indirectly causes its exposure to the sun where its phase changes.

In the diagram above, when there is a full moon, the earth is present between the sun and the moon. But when a new moon arises, the moon is present between the earth and the sun.

Therefore, the correct option for this question is C.

To learn more about the Phases of the moon, refer to the link:

https://brainly.com/question/2626244

#SPJ7