Two planets move around a star. Which one has the higher speed

a)one which is closer to the star
b)one which is farther from the star

Answer:

In a series circuit, the equivalent resistance is the algebraic sum of the resistances. The current through the circuit can be found from Ohm's law and is equal to the voltage divided by the equivalent resistance. The potential drop across each resistor can be found using Ohm's law.

Answer:

wasnt it a key

Explanation:

The weight of a sheet of aluminum that is 36" long, 24" wide, and thick would be 7.776 lbs.

We need to first find the volume of the aluminum sheet in cubic inches, and then use its density to calculate its weight.

The volume of the aluminum sheet can be calculated as:

V = l x w x h = 36 in x 24 in x 0.1 in = 86.4 cubic inches

where l is the length, w is the width, and h is the thickness of the sheet.

The density of aluminum is 0.090 lb/in^3, as given in the problem.

Therefore, the weight of the aluminum sheet can be calculated as:

W = V x density = 86.4 cubic inches x 0.090 lb/in^3 = 7.776 lbs

Therefore, the weight of the aluminum sheet is 7.776 lbs.

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The substance is zircon, of which interference analysis is done.

Wavelength of light in solid = λ = 329 nm

Wavelength of light from he-ne laser = λ' = 633 nm

Interference effect = n =

= n =  λ' / λ

= n = 633 / 329

= n = 1.92

The interference, in physics, is the net effect of the combination of two or more wave trains moving on intersecting or coincident paths. The effect is that of the addition of the amplitudes of the individual waves at each point affected by more than one wave.

Thus the substance is zircon.

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ANSWER:

4 sec

STEP-BY-STEP EXPLANATION:

Given:

Mass (m) = 50 kg

Speed (v) = 2.5 m/s

Work (W) = 4900 J

Speed is constant then a = 0

Net applying force = 0 N

We make the vertical force balance:

Now we calculate the distance:

Now, we calculate the time using the speed formula:

The time of the elevator trip is 4 seconds

The first minimum of an a- wideslit is produced by 410-nm ultraviolet light at an angle of 11.8, and by 700-nm red light at an angle of 20.5.

The lens and cornea are impervious to light with UV wavelengths less than 360 nm. As a result, violet light, which ranges in wavelength from 360 nanometers to 400 nanometers, is the best light for controlling myopia from both an efficacy and safety perspective.

d

sin

θ

=

n

λ

2

(

sin

θ

)

=

(

1

)

(

410

×

10

−

9

)

sin

θ

=

410

×

10

−

9

2

=

2.05

×

10

−

7

θ

=

sin

−

1

(

2.05

×

10

−

7

)

=

1.17

×

10

−

5

Thus the angle is

1.17

×

10

−

5

.

(b.)

Given data

The width of slit is

d

=

2.00

m

.

The number of minimum is

n

=

1.

The wavelength is, \lambda =700 nm

The wavelength of violet light, which ranges from 380 to 450 nanometers, is at the higher end of the visible spectrum (in experiments, people have so far seen to 310 nm). In contrast to X-rays and gamma rays, ultraviolet light has a wavelength that is shorter than violet but greater than both of them. In general, light violet is used to compose violet items.

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increase kinetic energy of body

Answer:

yes it increases kinetic energy of body on which it is applying it also cause heat loss

The third statement (Magnetic forces can raise the trains off the track, reducing frictional forces acting against the train. Less work is needed to propel the train) describes how magnetic forces can be harnessed to increase the speeds at which trains travel.

The scientifically-recognized concept dubbed "magnetic force" dictates that there either exists attractive or repulsive forces created between opposing magnet poles and electrically-charged moving particles--thanks to electromagnetic activity taking place behind-the-scenes. Most notably, all magnets produce an invisible magnetic field with intensified strength around their polar regions.

If two standalone magnets confront one another with opposing polarities visible on either end, then an intrinsic attraction manifests itself due to their respective concentrated fields at those points; though if you flip both magnets around so that their identical polarity ends face each other instead, then repulsion happens thanks to stronger opposing fields.

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the answer is D) 17

i just took the quiz

Answer:

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question

mass = 20 kg

velocity = 4 m/s

We have

momentum = 20 × 4 = 80

We have the final answer as

Hope this helps you

a) The area of the enclosed region as a function of the width of the region, y, is A(y) = y(400 - y).

b) The maximum area the gardener can enclose is 10000 square feet.

c) The dimension that should be used to create the pen of maximum area is y = x = 200 feet.

a) The region that needs to be enclosed has three sides, so the length of the fence needed will be y + 2x, where x is the length of the fence that runs perpendicular to the existing fence. Since the gardener has 800 feet of fencing, we can write \(y + 2x = 800 - y\), or \(x =\frac{400-y}{2}\). The area of the enclosed region is A = xy, so substituting the expression for x, we get \(A(y) = y(400 - y).\)

b) To find the maximum area the gardener can enclose, we need to find the maximum value of the area function A(y). Taking the derivative of A(y) and setting it equal to zero, we get y = 200. To confirm that this is a maximum, we can check the second derivative, which is negative for y = 200. Therefore, the maximum area the gardener can enclose is \(A(200) = 200(400 - 200) = 10000 square feet\).

c) Since y = 200 is the value of y that maximizes the area, the gardener should use a width of 200 feet and a length of\(x = \frac{400-200}{2} = 100 feet\)for the fence perpendicular to the existing fence. Therefore, the dimension that should be used to create the pen of maximum area is y = x = 200 feet.

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9514 1404 393

Answer:

  8.04 m/s²

Explanation:

A suitable formula is ...

  v² = 2ad

  a = v²/(2d) = (45 m/s)²/(2(126 m))

  a ≈ 8.04 m/s²

The acceleration is about 8.04 m/s².

To calculate the pressure using different equations of state and determine the percentage error for each calculation, we'll consider the ideal gas equation of state, Van der Waals' equation, and Beattie-Bridgeman equation.

a) Ideal Gas Equation of State:

The ideal gas equation is given by:

PV = nRT

Where:

P = Pressure

V = Volume

n = Number of moles of gas

R = Ideal gas constant (8.314 J/(mol·K))

T = Temperature (in Kelvin)

First, we need to convert the given temperature from Celsius to Kelvin:

T = -48°C + 273.15 = 225.15 K

We know that 10.5 g of N2 is present in the tank. To calculate the number of moles, we'll use the molar mass of nitrogen gas (N2), which is approximately 28 g/mol.

Number of moles (n) = mass / molar mass

n = 10.5 g / 28 g/mol ≈ 0.375 mol

Now, let's calculate the pressure using the ideal gas equation:

P = nRT / V

Given:

V = 270 L (volume of the tank)

Substituting the values:

P = (0.375 mol)(8.314 J/(mol·K))(225.15 K) / 270 L

b) Van der Waals' Equation:

The Van der Waals' equation corrects for the volume and intermolecular forces of real gases. It is given by:

(P + a(n/V)²)(V - nb) = nRT

Where:

P = Pressure

V = Volume

n = Number of moles of gas

R = Ideal gas constant (8.314 J/(mol·K))

T = Temperature (in Kelvin)

a and b are Van der Waals' constants specific to the gas.

For nitrogen gas, the Van der Waals' constants are approximately:

a = 1.39 (L²·MPa)/(mol²)

b = 0.0391 L/mol

We'll use the same values for n, R, and T as before, and substitute them into the Van der Waals' equation.

c) Beattie-Bridgeman Equation:

The Beattie-Bridgeman equation takes into account the compressibility factor (Z) to correct for the non-ideal behavior of gases. It is given by:

P = ZRT / (V - bZ)

Where:

P = Pressure

V = Volume

R = Ideal gas constant (8.314 J/(mol·K))

T = Temperature (in Kelvin)

b = Beattie-Bridgeman constant specific to the gas

Z = Compressibility factor

For nitrogen gas, the Beattie-Bridgeman constant (b) is approximately 0.00365 L/mol. However, we don't have information about the compressibility factor, so we'll assume it to be 1.

Now, let's calculate the pressures using the three equations and determine the percentage error for each calculation:

a) Ideal Gas Equation:

Calculate P using the formula: P = (nRT) / V

b) Van der Waals' Equation:

Calculate P using the formula: (P + a(n/V)²)(V - nb) = nRT

c) Beattie-Bridgeman Equation:

Calculate P using the formula: P = (ZRT) / (V - bZ)

To calculate the percentage error for each equation, use the formula:

Percentage error = [(actual pressure - calculated pressure) / actual pressure] * 100

Given actual pressure: 2 MPa = 2,000,000 Pa

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Answer:

D. 100 J

Explanation:

Given

Mass (m) = 2 kg

Height (h) = 5 m

Acceleration due to gravity (g) = 10 m/s²

Now

Work done(W)

= m * g * h

= 2 * 10 * 5

= 100 Joule

Hope it will help :)❤

The work done in uplifting a brick having a mass of 2kg along with a height of 5m above ground level would be:

D). 100 J

Given that,

Mass of the brick \(= 2Kg\)

Height of the brick \(= 5m\)

As we know,

Work Done (W) \(= mgh\)

where

m = Mass

g = Acceleration due to gravity

h = height

A.T.Q.

By substituting the given values, we get;

\(Work Done (W)\) \(= 2\) × \(10\) × \(5\)            (taking \(g = 10 m/s^2\))

\(= 100 J\)

Thus, the work done is 100 J and hence, option D is the correct answer.

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To determine the number of storage bits required in the controller memory for the twisting joint (type T) of the industrial robot, we need to calculate the repeatability, round the deviations to a reasonable precision, and then calculate the number of addressable positions based on the range of the joint and the chosen accuracy level.

First, let's calculate the repeatability of the joint. Given that the range of rotation is 322°, the repeatability can be calculated as 6 times the standard deviation. Since the standard deviation is a measure of how spread out the data is, multiplying it by 6 ensures that the accuracy of the joint is as close as possible to, but less than, its repeatability.
Next, let's analyze the given data. The 10 samples of deviations from the commanded angles are: 0.176, 0.04, -0.345, 0.079, 0.309, -0.004, -0.102, 0.12, 0.075, and 0.1.
To calculate the standard deviation of these deviations, we need to find the mean and then calculate the differences from the mean. Squaring these differences and taking the average will give us the variance, which we can then take the square root of to obtain the standard deviation.

After calculating the standard deviation, we multiply it by 6 to obtain the repeatability.
Now, to determine the number of storage bits required, we need to consider the accuracy of the joint. The accuracy depends on the precision required for representing the deviations. Assuming a reasonable level of precision, we can round the deviations to, for example, 3 decimal places.
Finally, the number of storage bits required in the controller memory can be calculated by multiplying the range of the joint (322°) by the accuracy (e.g., 0.001°, considering 3 decimal places). This will give us the number of addressable positions, which can be represented by the required number of storage bits.

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Answer:

0.76 lbs (if shoes 2lbs)

Explanation:

Gravity on Mars is only ~38% as strong as it is on Earth, so objects would only weigh ~38% of their Earth weight.

About, Kuiper belt objects have been seen orbiting by Neptune, according to observations of these objects. forty thousand celestial units.

In contrast to rocks or other solid objects, Neptune has a core the size of Earth made of heated liquids, making it a gas giant like Jupiter and Saturn. Neptune's atmosphere is primarily made up of water, ammonia, and methane, same as that of Uranus, another "ice giant." Neptune's startling blue color is caused by methane.

It has a solid center the size of Earth covered in a dense fog comprising water, ammonia, and methane. Hydrogen, helium, plus methane make up its atmosphere. Neptune shares Uranus' blue tint thanks to the methane.

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Explanation:

Given:

Δx = 1400 m

v = 0 m/s

t = 10.4 s

Find: v₀ and a

Δx = ½ (v + v₀) t

1400 m = ½ (0 m/s + v₀) (10.4 s)

v₀ = 269 m/s

Δx = vt − ½ at²

1400 m = (0 m/s) (10.4 s) − ½ a (10.4 s)²

a = -25.9 m/s²

Answer:

A

Explanation:

Answer:

man yall stop deleting my answers, the other person just said A:(

but yeah its mostly occurs in individual sports

Explanation:

Answer:

78.2 km

Explanation:

km is greater unit than meter and 1 km has 1000m so divide 78200 by 1000 we get 78.2 km so answer would be 7.82 x 10^1

Explanation:

It is given that,

Object distance from the mirror, u = -30 cm

Focal length of the mirror, f = +15 cm

Size of the object, h = 7.5 cm

We need to find the image distance and the size of the image.

Mirror's formula, \(\dfrac{1}{v}+\dfrac{1}{u}=\dfrac{1}{f}\)

v is image distance

\(\dfrac{1}{v}=\dfrac{1}{f}-\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{(15)}-\dfrac{1}{(-30)}\\\\v=10\ cm\)

Let h' is the size of the image. So,

\(\dfrac{h'}{h}=\dfrac{-v}{u}\\\\h'=\dfrac{-vh}{u}\\\\h'=\dfrac{-10\times 7.5}{-30}\\\\h'=2.5\ cm\)

So, the image is located at a distance of 10 cm and the size of the image is 2.5 cm.

An object which starts from its resting place & accelerates at a speed of 4 rad/sec², the angular displacement is 8 rad.

An object's angular displacement is described in the following:

Angle displacement is equal to θ\(f\)-θ\(i\).

The following methodology must also be applied to determine angular displacement when the object's acceleration, starting velocity, and time are known:

θ=ωt+ 1/2αt²

[where θ= the angular displacement of an object,

ω= initial angular velocity,

α= angular acceleration,

t= time]

In this case, the object starts from the rest position.

So, the initial angular speed, ω= 0 rad/sec

Provided angular acceleration ,α = 4 rad/sec²

Time ,t= 4 sec

So, θ= \(0*4+ (1/2)*4*4\)

⇒θ= 0+ 8

⇒θ= 8 rad

Therefore, it is concluded that the angular displacement is 8 rad.

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Answer:

Yes they can stop or bat the puck with their open hand

Explanation:

Answer: Distance

Explanation:

When driving, it is important for one to always use safety belt and obey traffic rules.

During a collision, it is vital to always adhere to safety belts and also use occupant protection systems in order to help reduce the impact that an be felt during a collision. As you travel downhill, your vehicle needs less power to reach the bottom and your stopping distance increase.

14.56 moles of gas occupy 200 liters at a pressure of 2.8 atmospheres and a temperature of 292 K.

The ideal gas law is a fundamental equation in thermodynamics that describes the behavior of ideal gases. It relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas.

To determine the number of moles of gas occupying a given volume, pressure, and temperature, we can use the ideal gas law equation:

                                      PV = nRT

Where:

P = Pressure (in atmospheres)

V = Volume (in liters)

n = Number of moles

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature (in Kelvin)

Rearranging the equation to solve for the number of moles (n), we have:

n = PV / RT

Now, let's calculate the number of moles:

P = 2.8 atmospheres

V = 200 liters

R = 0.0821 L·atm/(mol·K)

T = 292 K

n = (2.8 atm * 200 L) / (0.0821 L·atm/(mol·K) * 292 K)

Simplifying the equation:

n = 14.56 moles

Therefore, approximately 14.56 moles of gas occupy 200 liters at a pressure of 2.8 atmospheres and a temperature of 292 K.

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approximately 22.86 moles of gas occupy a volume of 200 L at a pressure of 2.8 atmospheres and a temperature of 292 K.

The ideal gas law equation relates the pressure, volume, temperature, and number of moles of a gas. It is given by:

PV = nRT

Where:

P is the pressure of the gas,

V is the volume of the gas,

n is the number of moles of the gas,

R is the ideal gas constant, and

T is the temperature of the gas in Kelvin.

To find the number of moles, we rearrange the equation as:

n = PV / RT

Substituting the given values into the equation:

n = (2.8 atm) * (200 L) / [(0.0821 L·atm/mol·K) * (292 K)]

n ≈ 22.86 moles

Therefore, approximately 22.86 moles of gas occupy a volume of 200 L at a pressure of 2.8 atmospheres and a temperature of 292 K.

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Answer:

C. There is a difference in air pressure.

Explanation:

If you build a common-source amplifier with an NMOS input transistor, and you want a current source as a load, and that current source goes from VDD to a node, the type of current source would be the diode-connected transistor.

An NMOS current source implemented as a diode-connected transistor is a type of bipolar transistor circuit that creates a constant current from an input voltage. The collector and emitter of the bipolar transistor are connected together in the circuit, effectively turning the transistor into a diode. The main advantage of diode-connected transistors is that they can generate currents of a specific magnitude and not be influenced by changes in the supply voltage.

The current generated by the diode-connected transistor is almost completely determined by the physical characteristics of the transistor and the biasing resistors used in the circuit. Another advantage of diode-connected transistors is that they may be cascaded in series to create current sources of various sizes. These devices have been commonly used to generate reference currents, voltage-to-current (V-I) converters, and bias currents in linear integrated circuits. So therefore diode-connected transistor is the type of current source, if you build a common-source amplifier with an NMOS input transistor, and you want a current source as a load, and that current source goes from VDD to a node.

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Explanation:

GIVEN DATA

since P(momentum)=Mass×Velocity

F = P2 -P1

t

F= Mv2-Mv1

t

F=M( v2-v1) ,(a=v2-v1)

t t

ANSWER EXPLANATION IN WORDS

That question is related to Newton's second law of motion, the question ask you to find the force it gives you a mass and a acceleration As we know that the SI unit of acceleration is newton per kilogram or metre per second square It is correct to write metre per second square instead of Newton Per kilogram because because all of them are the SI unit of acceleration so that is the answer we get 686 Newton by Force .