if 5ev of energy is supplied to an electron with a binding energy of 2.3ev, with what kinetic energy will the electron be launched?

The magnitude of the angular momentum of the Earth in a circular orbit around the sun is 1.91 x 10^40 kg m^2/s.

To calculate the magnitude of the angular momentum of the Earth in a circular orbit around the sun, angular momentum, L = I * w where L is the angular momentum, I is the moment of inertia, and w is the angular velocity.

For a circular orbit, the angular velocity is given by, w = v / r, where v is the speed of the Earth in its orbit and r is the radius of the orbit.

The moment of inertia of a rotating object is given by,

I = 2/5 * m * r^2

where m is the mass of the Earth and r is the radius of the orbit.

We can find the speed of the Earth in its orbit using the formula,

v = 2 * pi * r / T

where T is the period of the Earth's orbit around the sun.

The radius of the Earth's orbit is approximately 1.496 x 10^11 meters, and the period of the Earth's orbit is approximately 365.25 days or 31,557,600 seconds.

Using these values, we can calculate the speed of the Earth in its orbit.

v = 2 * pi * 1.496 x 10^11 / 31,557,600 = 29,783 meters per second

We can also calculate the moment of inertia of the Earth.

I = 2/5 * 5.972 x 10^24 kg * (1.496 x 10^11 meters)^2 = 9.70 x 10^37 kg m^2

L = I * w = (9.70 x 10^37 kg m^2) * (29,783 meters per second / 1.496 x 10^11 meters) = 1.91 x 10^40 kg m^2/s

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Answer: I think the answer to this question is D.The rubbing moves electrons to the object that holds them more tightly

Explanation:

When one object is rubbed against another, static electricity can be created. This is because the rubbing creates a negative charge that is carried by electrons. ... Similarly, when you rub a balloon on your head it causes opposite static charges to build up both on your hair and the balloon

Answer:

\(a=32\ m/s^2\)

Explanation:

Given that,

The velocity of an astronaut in a circular path, v = 16 m/s

The radius of the accelerator, r = 8 m

We need to find his centripetal acceleration. The formula that is used to find the centripetal acceleration is given by :

\(a=\dfrac{v^2}{r}\\\\a=\dfrac{(16)^2}{8}\\\\a=32\ m/s^2\)

So, the required centripetal acceleration is \(32\ m/s^2\).

The centripetal acceleration arad and tangential acceleration atan compare at points P and Q by Q having a greater arad and atan than point P.

arad = v² / r

v = 2 π r / T

arad = 4 π² r / T²

Since time period will be constant at any point in the radius line,

arad ∝ r

So larger the radius, larger will be the centripetal acceleration. The radius at point P is smaller than the radius at point Q.

arad at Q > arad at P

atan = r α

α = 2 π / T²

atan = 2 r π / T²

Since time period will be constant at any point in the radius line,

atan ∝ r

So larger the radius, larger will be the tangential acceleration. The radius at point P is smaller than the radius at point Q.

atan at Q > atan at P

Therefore, Q has a greater arad and atan than point P.

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The attribute of any rotating object determined by the product of the moment of inertia and the angular velocity is known as angular momentum.

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The two aspects of a force do scientists need to measure are magnitude and direction.

The force is defined as the external effort applied in the form of push or pull to cause the acceleration of a body.

Mathematically it is expressed as the product of mass and acceleration of an object.

Then, the standard expression for the force as per Newton's second law is given as,

F = ma

Here,

m is the mass of the body.

a is the magnitude of the acceleration of the body.

Also, force is a vector quantity that has significance for its magnitude as well as the direction.

So any sort of scientific analysis regarding the force needs its magnitude along with the direction of application.

Thus, we can conclude that the two aspects of a force do scientists need to measure are magnitude and direction.

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The pre-collision velocity of car 2 is 9.64 m/s, see the calculation at the section below.

Given Data

Mass m1 = 5kg

Mass m2 = 7kg

Initial Velocity of car 1 v1 = 8m/s

Initial Velocity of car v2 = ?

final Velocity of car v1 = 3m/s

final Velocity of car v2 = 12m/s

Let v1 be the pre-collision velocity of car 1 and let v2 be the pre-collision velocity of car 2.

We can use the conservation of momentum equation to solve for v2:

m1*v1 + m2*v2 = m1*v1' + m2*v2'

5*8 + 7*v2 = 5*3 + 7*12

40 + 7v2 = 15 + 84

7v2 = 49

v2 = 7*49/7

v2 = 9.64 m/s

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If you are keeping the speed constant and increasing the radius then the centripetal acceleration would decrease. An example of this would be driving a curve with an increasing radius (a spiral) at a constant speed. To understand why to remember that acceleration is the rate of change of velocity.

Answer:

25 and 24

Explanation:

Answer:

Explanation:

The region where the magnetic field around a current-carrying solenoid is uniform is inside the solenoid.

Yes, some current will be induced in coil Q if coil P is moved towards Q. This is due to the phenomenon of electromagnetic induction. When a changing magnetic field passes through a coil, it induces an electromotive force (EMF) in the coil, causing a current to flow. The movement of coil P towards coil Q will result in a changing magnetic field, inducing a current in coil Q.

If coil P is moved away from coil Q, the magnetic field passing through coil Q will decrease, resulting in a change in the magnetic flux. This change in magnetic flux will induce an EMF in coil Q, causing a current to flow in the opposite direction compared to the previous scenario.

iii. Some methods of inducing current in a coil include:

Moving a magnet towards or away from the coil

Changing the magnetic field through the coil by varying the current in a nearby coil

Rotating a coil in a magnetic field

Changing the area of the coil within a magnetic field

Comparison between a permanent magnet and an electromagnet:

Permanent Magnet: It is made of materials that are naturally magnetic, such as iron, cobalt, or nickel. It has a constant magnetic field and does not require an external power source to generate the magnetic field.

Electromagnet: It is made by wrapping a current-carrying coil (usually around an iron core). The magnetic field of an electromagnet can be controlled by varying the current flowing through the coil. It requires an external power source (such as a battery) to generate the magnetic field.

(i) If the amount of current in the conductor increases, the displacement of the conductor will experience a greater force. According to the right-hand rule, the force experienced by a current-carrying conductor is directly proportional to the current and the magnetic field strength. Therefore, an increase in current will result in a larger force and may lead to a greater displacement of the conductor.

(ii) If the horse shoe magnet is replaced by a weak horse shoe magnet, the displacement of the conductor may be less pronounced. This is because a weaker magnetic field will exert a smaller force on the current-carrying conductor, resulting in a reduced displacement.

The description of the circular metallic loop above the wire AB is missing. Please provide additional information or context for a more accurate response.

The subtype of Elliptical 1 is 5.

To find the subtype of Elliptical 1, we need to measure the longest and shortest diameters of the galaxy using a ruler. Let's assume that the longest diameter measures 8 centimeters and the shortest diameter measures 4 centimeters.

Subtype = 10 x (longest side - shortest side) / longest side

Substituting the measured values into the formula, we have:

Subtype = 10 x (8 - 4) / 8

Subtype = 10 x 4 / 8

Subtype = 40 / 8

Subtype = 5

Therefore, the subtype of Elliptical 1 is 5.

The subtype calculation formula given is used to categorize elliptical galaxies based on the elongation or roundness of their shape. The formula compares the difference between the longest and shortest sides of the galaxy and normalizes it by dividing it by the longest side. The resulting value, multiplied by 10, gives the subtype of the galaxy.

In this case, the subtype of 5 indicates that Elliptical 1 has a relatively moderate elongation. Subtypes range from 0 (perfectly round) to infinity (highly elongated). As the calculated subtype of 5 is a relatively low value, it suggests that Elliptical 1 is not highly elongated and likely exhibits a more rounded shape compared to highly elongated elliptical galaxies.

It's important to note that the measurements used in this example are arbitrary and for demonstration purposes. To obtain accurate subtype classifications, precise measurements of the longest and shortest diameters should be taken using appropriate astronomical techniques and instruments.

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To support a sign with a mass of 180 g using two vertical strings, you need to ensure that the tension in each string can hold up half of the total weight of the sign.

Since the mass of the sign is 180 g, you first need to calculate its weight (W) using the formula W = mg, where m is the mass and g is the acceleration due to gravity (approximately 9.8 m/s²). Convert the mass to kilograms (0.18 kg) and then calculate the weight:
W = 0.18 kg × 9.8 m/s²
W = 1.764 N (Newtons)
Now, divide the total weight by 2 to find the tension (T) required in each string:
T = 1.764 N / 2
T = 0.882 N
So, each vertical string needs to support a tension of 0.882 N to hold the sign up.
To support a 180 g sign using two vertical strings, the tension in each string should be 0.882 N. This ensures that the sign is evenly supported and remains in equilibrium.

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Answer:

You pull on the oars. By the third law, the oars push back on your hands, but that’s irrelevant to the motion of the boat. The other end of each oar (the blade) pushes against the water. By the third law, the water pushes back on the oars, pushing the boat forward.

Answer:

i think it is car B because  the greater the speed, the greater the drag force acting on the vehicle

Explanation:

Answer:

Atomic nuclei

Explanation:

Gamma rays have a wavelength that ranges from 10 picometers to 100 femtometers, which makes them incredibly small. To put this into perspective, a picometer is one-trillionth of a meter, and a femtometer is one-quadrillionth of a meter. Objects of a similar size to gamma rays include atomic nuclei, which are typically on the order of femtometers in diameter.

Answer:

a= 1 m/s^2

Explanation:

Average acceleration can be found by dividing the change in velocity by the time.

a= ΔV/t

The change in velocity is the difference of the final velocity and initial velocity.

ΔV= final velocity - initial velocity

The final velocity is 30 m/s and the initial velocity is 25 m/s

ΔV= 30 m/s- 25 m/s

ΔV= 5 m/s

The time is 5 seconds.

Now we know the two values.

ΔV= 5 m/s

t= 5 s

Substitute the values into the formula.

a= 5 m/s / 5 s

Divide.

a= 1 m/s/s

a= 1 m/s^2

The average acceleration of the car is 1 meter per second squared.

1. Connect the DC motor with a potentiometer to the Arduino board, along with a temperature sensor and an IR sensor with an LED.

2. Write the necessary code to integrate all the sensors and control the motor based on the inputs.

To connect a DC motor with a potentiometer to an Arduino board, you will need to use a motor driver module that can handle the power requirements of the motor. The motor driver module allows you to control the speed and direction of the motor using the Arduino. Connect the motor to the appropriate terminals on the motor driver module and the potentiometer to an analog input pin on the Arduino. The potentiometer will act as a voltage divider, allowing you to vary the input voltage to control the motor speed.

Next, connect a temperature sensor that can measure temperatures in the range of -10 to +45 degrees Celsius. Depending on the type of temperature sensor you are using, you may need to follow specific wiring instructions provided by the manufacturer. Connect the temperature sensor to the appropriate digital or analog input pin on the Arduino board.

Lastly, connect an IR sensor with an LED to detect motor overspeed. The IR sensor can be used to measure the rotational speed of the motor by detecting interruptions in the infrared beam caused by the rotating motor shaft. If the motor speed exceeds the threshold of 25,000 rpm, the IR sensor will trigger an output to activate the LED as a signal.

To make all the sensors work together, you will need to write code using the Arduino programming language. Use appropriate libraries and functions to read the sensor values and implement the desired logic for motor control and overspeed detection. You can define temperature thresholds and motor speed limits in the code and take appropriate actions based on the sensor readings.

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Question: A ship anchored at sea is rocked by waves that have crests 100 m apart the waves travel at 70m/S, at what frequency do the waves reach the ship?

Answer:

0.7 Hz

Explanation:

Applying,

v = λf............... Equation 1

Where v = velocity of the wave, f = frequency fo the wave, λ = wavelength of the wave

make f the subject of the equation

f = v/λ................. Equation 2

From the question,

Given: v = 70 m/s, λ = 100 m ( distance between successive crest)

Substitute these values into equation 2

f = 70/100

f = 0.7 Hz

Hence the frequency at which the wave reach the ship is 0.7 Hz

the object moving at constant velocity so the answer is c

Answer:

The acceleration of the ball from 0.5 to 0.7 seconds is 10 m/s²

Explanation:

The data from the given velocity-time graph are as follows;

Velocity (meters per second)       \({}\)                       Time (seconds)

0                                                    \({}\)                          0.4

0.5                                                   \({}\)                        0.45

1.                                                 \({}\)                             0.5

1.5                                                   \({}\)                         0.55

2.2                                                   \({}\)                        0.6

2.5                                                   \({}\)                        0.65

3.0                                                   \({}\)                        0.7

3.5                                                   \({}\)                        0.75

4.0                                                   \({}\)                        0.8

4.5                                                   \({}\)                        0.85

Therefore, the average acceleration of the ball from 0.7 to 0.7 seconds is given as follows;

Acceleration = (Change in velocity)/(Related change in time)

Acceleration = (3.0 - 1)m/s/(0.7 - 0.5)s = 2/0.2 m/s²  = 10 m/s²

The acceleration of the ball from 0.5 to 0.7 seconds = 10 m/s².

Answer:

323.4N

Explanation:

Given parameters:

Mass of the box = 33kg

Unknown:

Normal force on the body  = ?

Solution:

The normal force of a body is the vertical force the body exerts on another body.

It is expressed as;

        Normal force  = mass x acceleration due to gravity

Acceleration due to gravity  = 9.8m/s²

Normal force  = 33 x 9.8  = 323.4N

Answer:

false

Explanation:

this is what google said

No because the path the electricity needs to follow is broken. In a parallel circuit, electricity has more than one path to follow. Electrons can follow different paths as they flow from the negative side of the battery to the positive side.

One of the frequencies for transmitting and receiving telephone phone signals in the United States is 850 MHz. The wavelength in meters of these radiowaves0.353 m.

A waveform signal transmitted through space or wire has a wavelength that is the interval between two identical locations (adjacent peaks) in consecutive cycles. This length is usually expressed in meters (m), centimeters (cm), or millimeters (mm) in wireless systems. Meter, commonly abbreviated m, is the SI unit of wavelength. Multiples or fractions of meters are also used to measure wavelength.

The wavelength of sunlight is an important characteristic that determines the properties of light. Green light has a different wavelength than both, and red light has a different wavelength than blue light. The longest wavelengths are found in gamma rays. Light with the longest wavelength is red, which is the extreme of the spectrum. Blue or violet light has the shortest wavelengths. All colors in the color spectrum combine to create white light.

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Answer:

it has to be ''G''

Explanation:

.

Answer:

J

Explanation:

Sexual reproduction includes 2 parents but asexual reproduction only requires 1.

If a student places two books on a table, the one with less mass will have less gravitational potential energy compared to the one with more mass if they are at the same height above the floor.

When a student places two books on a table, the gravitational potential energy of each book depends on its mass and the height from the reference point, which in this case is the floor. The formula for gravitational potential energy is U=mgh, where U is the potential energy, m is the mass, g is the acceleration due to gravity, and h is the height. Therefore, the book with less mass would have less gravitational potential energy compared to the book with more mass if they are placed at the same height.
This is because the potential energy of an object is directly proportional to its mass and height. Therefore, if two objects are at the same height, the one with less mass will have less potential energy. On the other hand, if two objects have the same mass, the one at a greater height will have more potential energy.
In conclusion, if a student places two books on a table, the one with less mass will have less gravitational potential energy compared to the one with more mass if they are at the same height above the floor.

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Answer:

get help with your work

try understand your work

ask your teacher for assistance or class

or maybe cheat but understand the work first if you wanna

The  value in terms of 1m of oil is 1.25

To convert the pressure at a point from 1 meter of water to its equivalent value in meters of oil, we can use the following formula:

Pressure = height × density × gravity

Let's first find the pressure exerted by 1 meter of water.

1 g x 0.8 = 0,8

1 x g x 1m = 0.8 x g * h2

We are to solve for h2

h2 = 1 / 0.8

= 1.25

Hence tghe  value in terms of 1m of oil is 1.25

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According to Newton's third rule of motion, whenever a first object applies a force to a second object, the first object feels a force that is both equal to and opposite from the force that it applies.

What is Force?

In physics, a force is an influence that can change the motion of an object. A force can cause a mass object's velocity or acceleration to change. Force can be described intuitively as a push or a pull. Because it has both magnitude and direction, a force is a vector quantity.

To find the work done by friction over the full length of the roller coaster, you will need to calculate the force of friction acting on the marble over the entire track. The force of friction can be calculated using the formula: F = μ * N, where μ is the coefficient of kinetic friction and N is the normal force. Once you have calculated the force of friction, you can then calculate the work done by multiplying the force of friction by the distance travelled. The formula for work is W = F * d, where F is the force of friction and d is the distance travelled.

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Given data,The first humid air stream is at 105°F and 10% relative humidity.The second humid air stream is at 40°F and 20% relative humidity.

The temperature and relative humidity of the product need to be found.Using the Mass Conservation Equation,Q1+Q2 = Q3Where Q1 = m1 * h1Q2 = m2 * h2Q3 = m3 * h3We know that equal volumes of two humid air streams are mixed adiabatically. Therefore, the mass flow rate can be assumed to be the same for both streams. Hence, m1 = m2 = m3.Now, using the psychrometric chart, we can find that h1 = 27.2 and h2 = 7.5.Implementing the values, m1 * h1 + m2 * h2 = m3 * h3m3 = m1 + m2Since the mass flow rates are equal, m1 = m2 = m3/2Substituting the values of h1, h2, and m1 in the equation,

we get (m3/2) * 27.2 + (m3/2) * 7.5 = m3 * h3h3 = (13.6 * 27.2 + 13.6 * 7.5)/27.2+7.5 = 9.13 + 5.46 = 14.59Using the formula,T = (h3 - i)/kWhere k = 1.08 for this case and i = More than 100 (Temperature cannot be greater than 100°F because the air is not superheated)T = (14.59 - 100)/1.08 = -78.61°F (Temperature cannot be negative, hence, this means that the humid air has become saturated and reached its dew point)Therefore, the temperature of the product is 100°F and its relative humidity is 100%.

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Answer:

Density = 2.66 g/cm³

Explanation:

Density = Mass / Volume

Since, the units are same as of kg/m³

==> Density = 400 / 150

==> Density = 2.66

Density = 2.66 g/cm³

\(\\ \sf\longmapsto Density=\dfrac{Mass}{Volume}\)

\(\\ \sf\longmapsto Density=\dfrac{400}{150}\)

\(\\ \sf\longmapsto Density=2.6g/cm^3\)