Total Resistance of Circuit (2) 80 20 40 60 Resistance of R2 (2) In the laboratory, two resistors, R1 and R2, are connected in series in a circuit. The total measured resistance of the circuit, Rr, is varied, and the results are plotted above. Which of the following is closest to the resistance of R1? 175kΩ 100kΩ 80kΩ 0.93kΩ 11,000kΩ

Answer:

A) 30h

B) Scalar quantity

Explanation:

Part A

[Note: v represents speed, d represents distance, and t represents time]

Given:

\(d = 600 km\)

\(v = 20 km/h\)

Required:

\(t = ?\)

Analysis:

\(v = \frac{d}{t} \\t = \frac{d}{v}\)

Solution:

\(t = \frac{d}{v} \\t = \frac{600 km}{20 km/h} \\t = 30 h\)

Statement:

Therefore, the ship was sailing for 30 hours.

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Part B

This is a scalar quantity because time only has magnitude and can never be given direction so it can never be a vector quantity.

Answer:

490 W

Explanation:

F = ma = (50 kg)(9.8 m/s²) = 490 N    (Weight = W = mg)

Work = W = Fd = (490 N)(5 m) = 2450 J

Power = W/t = 2450 J / 5 s = 490 J/s = 490 W  (watts)

Answer:

A force of 355 N is applied to an object that accelerates at a rate of 7.8 m/sec2 . What is the mass of the object ?

Explanation:

question: Please help!!!

If a bottle is being squeezed with a force of 10 Newtons and the area of the bottle is 15

squared inches. What is the pressure??

Answer:

1025.64 N/m²

Explanation:

Pressure: This can be defined as the ratio of force to area. The si unit of pressure is N/m².

From the question,

P = F/A........................ Equation 1

Where F = Force, A = Area.

Given: F = 10 Newtons, A = 15 Squared Inches = (15×0.00065) = 0.00975 m²

Substitute these values into equation 1

P = 10/0.00975

P = 1025.64 N/m²

Hence the pressure of the bottle is 1025.64 N/m²

Answer:

0.66 psi

Explanation:

Answer:

I dont know what you mena by road and the people

Answer:

A national park is one such protected area for the special species of flora and fauna of the region. In Nepal, there are numerous national parks to conserve and protect wildlife and their natural habitat.

Among the given expressions, the correct one to find the angle in the drawing is option C) ? = tan(⁻¹)(⁵).

The expression tan^(-1)(5) represents the inverse tangent function, also known as arctan or atan. It is commonly used to find the angle when the ratio of the opposite side to the adjacent side is known. In this case, the expression suggests that the angle can be determined by taking the inverse tangent of 5. By plugging in the appropriate values and evaluating the expression, the angle can be obtained. It's important to note that without further context or information about the specific problem or drawing, it's challenging to provide a definitive answer. However, based on the given options, option C) ? = tan(⁻¹)(⁵) is the expression that can be used to find the angle.

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The horse has the highest momentum among the three animals.

Given the following data:

In Physics, Momentum can be defined as the multiplication (product) of the mass of a physical object and its velocity.

Basically, momentum is a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

\(Momentum = Mass\) × \(Velocity\)

In this scenario, the momentum of the elephant is zero (0) because the elephant is at rest, meaning it is not in motion.

Furthermore, both the cheetah and horse are having the same velocity of 80 km/h but the horse has a higher mass of 500 kilograms.

Hence, we can deduce that the horse has the highest momentum among the three animals.

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Answer:

See the answer below

Explanation:

Acceleration due to gravity (g) is the accelerational force experienced by a body as a result of the influence of the earth's gravitational force. It is a vector quantity, that is, it has both magnitude and direction.

The acceleration due to gravity is inversely proportional to the square of the radius of the earth. Hence, g at the equatorial region is slightly lesser (9.780 m/s2) than that of the polar regions (9.832 m/s2) of the earth because the earth bulges at the equator leading to a higher radius than at the poles.  

The magnitude of the pulling force on a block of mass 32kg being pulled up a 29-degree slope by a force directed parallel to the slope, with a coefficient of kinetic friction of .61 and an acceleration of 1.37 is 538.03N.

To find the magnitude of the pulling force, we need to first calculate the gravitational force acting on the block, which is given by m*g (where m is the mass of the block and g is the acceleration due to gravity, 9.8m/s^2).

Here, m = 32kg, so the gravitational force is 313.6N. Next, we need to calculate the component of this force parallel to the slope, which is given by m*g*sin (29°) (where 29° is the angle of the slope).

This comes out to be 150.4N. Since the block is being pulled up the slope, the directed force along the slope (Fc) must be greater than the component of gravitational force parallel to the slope (150.4N).

Now, we need to consider the effect of kinetic friction.

The force of kinetic friction (F k) acting on the block is given by the formula F k = Uk*N, where u k is the coefficient of kinetic friction and N is the normal force acting on the block (which is equal to m*g*cos(29°) ).

Substituting the values, we get F k = 588.7N. Since the block is being pulled up the slope, the force along the slope must overcome the force of friction.

Hence, we have Fc - F k = m*a, where m is the mass of the block and a is the acceleration of the block (given as 1.37m/s^2). Substituting the values, we get Fc - 588.7 = 43.84, which gives Fc = 632.54N. Therefore, the magnitude of the pulling force is approximately 538.03N.

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The boat will not move since the two people exchanging seats will not cause a net linear momentum on the boat.

The equation for linear momentum is P = mv, where m is the mass and v is the velocity of an object.

Since the boat is initially at rest, its linear momentum is P = 0.  

Let's start by calculating the linear momentum before the exchange:

P = (85kg)(0) + (55kg)(0) = 0

After the people exchange seats, the linear momentum of the boat is no longer 0.

Now let's calculate the linear momentum after the exchange:

P = (85kg)(v) + (55kg)(-v) = (140kg)v

Since the total linear momentum is conserved, we can equate the two linear momentums and solve for v:

0 = (140kg)v
v = 0

The equation for linear momentum is P = mv, where m is the mass and v is the velocity of an object.

Therefore, the boat will not move since the velocity of the boat is 0.

This makes sense since the two people exchanging seats will not cause a net linear momentum on the boat.

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Answer: a and b i toook the test

Answer:

Cold dry air mass forms over land

Explanation:

Answer:

The horizontal and vertical displacement is 128.02 m and 68.07 m respectively.

Explanation:

Displacement, d = 145 m

The top of a building at an angle of 28 degrees below the horizontal

We need to find the horizontal and vertical displacement.

For horizontal displacement,

\(D_x=d\cos\theta\\\\D_x=145\times \cos(28)\\\\D_x=128.02\ m\)

For vertical displacement,

\(D_y=d\sin\theta\\\\D_y=145\times \sin(28)\\\\D_y=68.07\ m\)

So, the horizontal and vertical displacement is 128.02 m and 68.07 m respectively.

Answer:

handle, trigger, spindle

The melting point of a substance is the temperature at which the substance changes its phase from solid to liquid.

The freezing point is the temperature at which the substance changes its phase from liquid to solid.

The melting point of a substance is the same as the freezing point. That is when the temperature of the substance in the liquid form is increased continuously, the temperature at which the substance turns into a solid is equal to the temperature at which the substance will turn into liquid from solid if the temperature is decreased continuously, from a higher temperature.

Answer:

Bacteria

Explanation:

UV kills bacteria and its 8 letters

To determine the magnitude of the electric field at a point 2.5 cm from the center of the aluminum ball, we will need the following information:

1. The charge (Q) of the aluminum ball in coulombs (C)
2. The distance (r) from the center of the aluminum ball to the point where we want to find the electric field (in meters)


The formula to calculate the electric field (E) is given by Coulomb's Law:

E = k * Q / r²

where,
- E is the electric field (in newtons per coulomb, N/C)
- k is the electrostatic constant (approximately 8.99 × 10^9 N·m^2/C^2)
- Q is the charge of the aluminum ball (in coulombs, C)
- r is the distance from the center of the aluminum ball to the point of interest (in meters)


To proceed with the calculation, please provide the charge (Q) of the aluminum ball. Note that the distance (r) should be converted from centimeters to meters:

r = 2.5 cm × (1 m / 100 cm) = 0.025 m

Once you have the charge (Q), you can use the formula above to find the magnitude of the electric field at the point 2.5 cm from the center of the aluminum ball.

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Using the calculations provided, if you paid your servants $8 per hour, it would take 6 minutes of their time to generate 1kWh of energy.

An hour of their labor would generate 1,000Wh or 1 kWh. Therefore, the cost of 1 kWh of energy would be $0.48. This is significantly higher than the typical cost of 1 kWh, which is around 10 cents.

To make this cost-effective, you would need to either decrease the wage of the servants to a significantly lower rate than the U.S. minimum wage or find a more efficient means of generating energy than that of hand-cranked electric generators.

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The typical speed of commercial aircraft is approximately 460-575 mph, or 740-930 km/h, according to Flight Deck Friend.

The amount of time needed to cover a particular distance on the ground is referred to as ground speed. For instance, when flying at cruising altitude, airplanes may have a ground speed of 300-600 knots (555-1,110 kmph). However, depending on the wind, the plane's speed over the ground may alter.

The aircraft must travel south at a component speed that is opposite of and equal to 80 km/h. The plane's overall speed can only be the same after that. There will be a speed of 320 kilometers per hour.

The typical speed of a commercial airplane is between 460 and 575 mph (740 to 930 km/h).

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Answer:

The wavelength is 2 meters

Explanation:

The relationship between the frequency, the speed and the wavelength is given by the relation;

v = f × λ

The given parameters are;

The distance of the duck from the edge of the pond = 12 m

The number of ripples produced per second = Frequency, f = 2 Hz

The time it takes the ripple to reach the edge of the pond after travelling past the duck = 3 seconds

Therefore, speed of the wave, v = Distance/time = 12 m/(3 s) = 4 m/s

The wavelength, λ, is therefore;

λ = v/f = (4 m/s)/(2 Hz) = 2 meters.

The specific heat of the iron is 681.5 J/kg•°C.   We can use the equation for heat transfer to solve this problem:

Q = mcΔT

where Q is the heat transferred, m is the mass of the iron, c is the specific heat capacity of the iron, and ΔT is the change in temperature.

First, we need to calculate the heat transferred to the iron block when it is heated to 275°C on the burner:

Q1 = m1c1Δ1

where m1 is the mass of the iron block, c1 is the specific heat capacity of the iron block, and Δ1 is the change in temperature of the iron block. We can calculate these values as follows:

m1 = 175 g

c1 = 0.48 J/g°C

Δ1 = 275°C - 25°C = 250°C

Q1 = 175 g x 0.48 J/g°C x 250°C = 44 J

Next, we need to calculate the heat transferred to the beaker of water when the iron block is placed in it:

Q2 = m2c2Δ2

where m2 is the mass of the iron block, c2 is the specific heat capacity of the water, and Δ2 is the change in temperature of the water. We can calculate these values as follows:

m2 = m1 + 75 g = 175 g + 75 g = 250 g

c2 = 4.182 J/g°C

Δ2 = 75°C - 25°C = 50°C

Q2 = 250 g x 4.182 J/g°C x 50°C = 637.5 J

Finally, we can calculate the specific heat of the iron by subtracting the heat transferred to the beaker from the total heat transferred:

c = Q1 + Q2 - Q3

= 44 J + 637.5 J - Q3

where Q3 is the heat transferred to the iron block and the water equilibrate at 75°C.

We can assume that the heat transferred to the water is negligible, so Q3 = 0.

Therefore, the specific heat of the iron is:

c = 44 J + 637.5 J - 0 J

= 681.5 J/g°C

The units of specific heat are J/g°C, so we need to convert 681.5 J/g°C to J/g•C.

681.5 J/g°C = 681.5 J/g x 1000 g/kg x 1000 kg/1000 g = 681.5 J/kg•°C

Therefore, the specific heat of the iron is 681.5 J/kg•°C.  

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Answer:

The right answer is c because when we heat solid object the molecule will start lose attraction on object

Explanation:

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a) The image distance is -31.18 cm (real and inverted).

b) The magnification is -1.28.

c) Sherlock Holmes observes a real and inverted image that is smaller in size.

a) To find the image distance, we can use the lens equation:

  1/f = 1/di + 1/do

  where f is the focal length, di is the image distance, and do is the object distance. Given that the focal length (f) is 24.5 cm and the object distance (do) is 10.5 cm, we can substitute these values into the equation:

  1/24.5 = 1/di + 1/10.5

  Solving for di, we find:

  di ≈ -31.18 cm

  The negative sign indicates that the image is formed on the opposite side of the lens, which corresponds to a real image.

b) The magnification (M) is given by the ratio of the image distance to the object distance:

  M = di/do

  Substituting the values, we have:

  M ≈ -31.18 cm / 10.5 cm ≈ -1.28

  The negative magnification indicates that the image is inverted.

c) Based on the negative magnification and the fact that the image is formed on the opposite side of the lens (real image), we can conclude that Sherlock Holmes observes a real and inverted image. Since the magnification is greater than 1, the image is smaller in size compared to the object.

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Answer:

less force

Explanation:

less force because they is increase in area and not enough energy to balance the whole equation

Answer:

the same

Explanation:

Answer:

First at all normal force

Explanation:

F= MG ( 50kg)(9.8m/s)= 490 N

The voltage in the secondary coil for a step up transformer is 1.58 x 10³ Volts.

The potential difference between two ends of a metallic conductor is called the voltage.

The primary coil has Np = 250 turns and the secondary coil has Ns = 475 turns. If the input effective voltage is 83.0 V,

Turn ratio = Ns/Np = Vs/Vp

Substituting the values, we get the value of Vs

Vs =(475/250) x 83V

Vs = 1.58 x 10³ Volts

Thus, the voltage in the secondary coil is 1.58 x 10³ Volts

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==>  The total mass resting on the table is (5 kg + 3 kg) = 8 kg.

==>  The total weight of that mass is (8 kg) x (9.8 m/s) = 78.4 newtons

==>  The boxes are stacked.  So the table doesn't know if the weight on it is coming from one box, 2 boxes, 3 boxes, or 100 boxes in a stack.  The table only knows that there is a downward force of 78.4 newtons on it.

==>  The table stands in a Physics classroom, and it soaks up everything it hears there.  It knows that every action produces an equal and opposite reaction, and that forces always occur in pairs.  

Ever since the day it was only a pile of lumber out behind the hardware store in the rain, the table has known that in order to maintain the good  reputation of tables all over the world, it must resist the weight of anything placed upon it with an identical upward force.  This is the normal thing for all good tables to do, up to the ultimate structural limit of their materials and construction, and it is known as the "normal force".

So the table in your question provides a normal force of 78.4 newtons. (d)

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