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Physics

I’d correct her in this way.

Electrical potential is the amount of energy acquired or lost per unit of charge when a charge is moved away from a reference point where the potential is assumed to be zero. Voltage is the difference in potential between any two places, where the potential may or may not be zero.

Suppose that point A's potential is 10000 volts and point B's potential is 10100 volts with respect to a stated reference point that is sometimes an infinite distance away. So 100 volts of voltage will exist between B and A.

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Answer:

Probably because it's not anytype of solid or liquid and it's not a gas

Explanation:

The correct answer is option B: there is a decrease in the speed of the emitted electrons.

If we increase the wavelength of the light and determine that electrons are still being emitted. The true statement is that there is a decrease in the speed of the emitted electrons.

The relation between wavelength and the energy of a light photon is given by the following equation;

E = hc / λ

Here 'E' represents the energy of light photons, h is the plank's constant, and c is the light speed where λ  is the wavelength of the light.

From the equation, we can see that the energy of photon and wavelength have an inverse relationship with each other.

So, as the wavelength increases, the value of energy decreases.

If the energy decreases then the speed and K.E of the emitted electron also decrease.

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Answer:

Both graphs are linear with positive slopes, but the second graph has a steeper slope than the first graph. I just took the quick check so I know the answer from Connexus.

Explanation:

Since the first graph goes over 1 second and up 2 meter/s then that would mean it is less steep than the graph that goes over 1 second and up 4 m/s; so this rules out option A. Now for C and B, it says a constant "Horizontal line" which would be wrong for the case because the slopes are not going sideways, the slopes in the question are going in a slanted vertical constant motion. I hope this helps!  

Both graphs are linear with positive slopes, but the second graph has a steeper slope than the first graph, therefore the correct answer is option A.

The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².

As given in the problem Suppose you are looking at two graphs of velocity vs time.

The first graph is of an object undergoing constant positive acceleration of 2 meters/second², and the second graph is of an object undergoing constant positive acceleration of 4 meters/second².

The second graph has a higher slope than the first, but both graphs are linear with positive slopes, thus option A is the right response.

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the mass of the car is 823.52 kg.

When a force is applied to a body, the momentum's magnitude, direction, or both can change. One of the most significant laws in all of physics is Newton's second law. F = ma, where F (force) and a (acceleration) are both vector values, can be used to represent a body whose mass m is constant. We can deduce a relationship between forces F and acceleration a from Newton's second law (via mass). The F is always the RESULTANT force on the item, and that is the important part. F=0 if there is no acceleration of the item.

Due to that,

F=7000 N

a=8.5 m/s²

we know that

F=ma

mass= 7000/8.5

=823.52 kg

Consequently, the mass of the car is 823.52 kg.

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The maximum velocity of an 89.0 kg person bouncing on a bathroom scale having a force constant of 1.63 x 10^6 N/m is 31.1 m/s.

The above situation represents a case of Simple Harmonic Motion(SHM).

Following are some general equations of SHM :

ω = √k/√m

Here ω is the angular frequency

k is the force constant

m is the mass of the body

And the maximum velocity is given by the formula,

v = ω^2 x A

Where A represents the amplitude

Putting the given values in the above equation,

v = k/m x A

V = 1.63 x 10^6 x 0.17 x 10^-2/ 89

v = 31.1 m/s

Hence, the maximum velocity of an 89.0 kg person bouncing on a bathroom scale having a force constant of 1.63 x 10^6 N/m is 31.1 m/s.

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Answer:

Sedimentary rocks are deposited in layers as strata, forming a structure called bedding. Sedimentary rocks are often deposited in large structures called sedimentary basins.

Explanation:

Answer: Strata

Explanation: Strata are layers of rock, or sometimes soil. In nature, strata come in many layers. It is a term in sedimentary and historical geology; the singular is stratum. The study of strata is called stratigraphy.

The sr-71 operating at its region of the atmosphere is it flying in -

take into account an sr-seventy one working at its maximum service ceiling.

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Answer:

Your answer is p=23.33 g/cm^3

Explanation:

We have that for the Question "a platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams" it can be said that The density of the platinum bar is

p=23.33g/cm^3

From the question we are told

a platinum bar measures 5.0 cm long, 4.0 cm wide and 1.5 cm thick. it has a mass of 700.0 grams

Generally the equation for the density  is mathematically given as

p=M/V

therefore

P=M/V

P=700/5x4x1.5

p=23.33 g/cm^3

The magnitude of the source charge is indicated by the outward arrows. The greater the number of arrows, the greater its strength. This is because each arrow represents the electrical force exerted by the source. If we add up all the arrows present, the electric force will be even greater. The descending order of the answers is C > A > B > D.

Electric charge is a physical property of matter that imparts a force on charged matter when placed in an electromagnetic field. Charge can be positive or negative (typically carried by protons and electrons, respectively). Similar charges repel and dissimilar charges attract. An object with no net electric charge is said to be neutral. Early knowledge of how charged matter interacts, now called classical electrodynamics, is still accurate for problems that do not require consideration of quantum effects. Charge is a conserved property. The net charge of the isolated system (the amount of positive charge minus the amount of negative charge) does not change. It is denoted by Q.

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The distance traveled in 10 sec is 250m

Given:

Initial velocity, u = 0

Acceleration, a = 5 m/s2

Time elapsed is t = 10 seconds

The distance traveled in 10 seconds by the particle when accelerating at 5 m/s2 is given by,

[tex]x= ut + \frac{1}{2} at^{2}[/tex]

Putting the values,

x= 0 x 10 + [tex]\frac{1}{2} (5) (10)^{2}[/tex]

x= 250 m

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The magnitude of the momentum of the proton is 4.233 × 10⁻¹⁹ kg m/sec

Momentum can be calculated by using the formula,

Momentum = Mass × Velocity

For this proton we have,

Mass of proton is a constant = 1.67 × 10⁻²⁷ kg

Velocity = 0.845 c, where c is the constant speed of light.

Velocity = 0.845 × 3 × 10⁸

Velocity = 253.5 × 10⁶ m/sec

Substitute with the mass and velocity to calculate the momentum as follows:

Momentum = 1.67 × 10⁻²⁷ × 253.5 × 10⁶

Or, momentum = 4.233 × 10⁻¹⁹ kg m/sec

Hence, the momentum of the proton is 4.233 × 10⁻¹⁹ kg m/sec.

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The symbol Si represent Silicon and the Symbol Ge represents Germanium.

A transistor is a semiconductor device which is used to  switch or amplify electrical signals and power. To amplify electric current or to block its passage these transistors are used. Bipolar transistors, Field-effect transistors, and Insulated-gate bipolar transistors are the three types of transistors. The first transistor is the point-contact transistor which is invented in 1947.

Transistors are  formed by connecting two diodes back to back. It has got two PN junctions. In the past transistors were made from Germanium and nowadays they are made from very pure Silicon. The symbol Si represent Silicon and the Symbol Ge represents Germanium.

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No of electrons in a circular wafer = 7.948 *10¹⁰

Density of silicon at 300k is =1.5*10¹⁰ electron/cm³

given diameter =15 cms

radius=diameter / 2= 15 /2= 7.5 cms

Thickness =300 um

                =300*10⁻⁶m=300*10⁻⁴cm=3*10⁻²cm

Voiume of the circular wafer=Пr²

                                              =П*7.5*7.5*3*10⁻²cm

                                              =П*7.5*7.5*3*10⁻²cm²

number of free electrons in circular wafer =e=ni*v electrons/cm³*cm³

                                                      =1.5*10¹⁰*П*7.5*7.5*3*10⁻²

                                                    =1.5*П*7.5*7.5*3*10⁸electron

                                                   =794.8125*10⁸ electron

                                                   =7.948*10⁸ electron.

In the electron cloud version of the atom, an orbital is described because the maximum probably area of an electron. An atomic orbital is a mathematical time period in atomic idea and quantum mechanics that describes the location and wavelike behaviour of an electron in an atom.

The area and wavelike behavior of an electron in an atom are described mathematically by the phrase "atomic orbital" in the fields of quantum mechanics and atomic theory. It is represented mathematically as a region that has a good chance of harboring electrons.

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The heat required to rise the temperature of 2.40 mol of an ideal gas by 50.0 k near room temperature is 2494.2J

What is Specific heats of ideal gas ?

The amount of energy required to raise a gas's temperature by 1 degree Celsius per mole is known as its molar specific heat. Additionally, the type of thermodynamic process and the molecularity of the gas affect the value of molar specific heat of a gas.

No. of moles , n = 2.40

Temperature rise,

ΔT=50K

For a diatomic gas, molar specific heat at constant volume, Cv =5/2R

therefore, Heat given can be calculated as :

Q =n×Cv×ΔT=2.40×5/2R×50 =2.40×5/2×8.314×50 = 2494.2J

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The momentum of the car is 4620 cm/s.

The momentum of an object is defined as the product of the mass of the object and its velocity. Momentum is denoted by the symbol 'M'. It is presented in the unit meter per second. Velocity is defined as the distance divided by time. It is also presented in the unit meter per second.

Mass of the car = 30 g

Height of the hill = 12 cm

Speed of the car = 154 m/s

Distance traveled by car = 275 cm

The momentum of the car is,

Momentum = Mass × Velocity

M = m × v

= 30 × 154

= 4620 cm/s

Therefore, the momentum of the car is 4620 cm/s.

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