A swimmer with a body temperature of 37 C is on the pool deck with an air temperature of 22 C. Assume an area of 2.0 m². Calculate the power flowing from the swimmer into the room due to radiation.

It tells us that a toy has a mass of 3.0 kg, with a speed of 4.0 m/s.

We apply the following formula:

Ec = m * v²/2

We replace data and solve:

Ec = 3.0 kg* (4.0 m/s)²

Ec = 3.0 kg* 16 m²/s²/2

Ec = 48 kg * m²/s²/2

Ec = 24 kg * m²/s²

Ec = 24 N * m ========> Joules units

Ec = 24 J

Answer:

2.4 ohms

Explanation:

From the question,

Applying ohm's law,

V = IR.................... Equation 1

Where V = Voltage of the car battery, I = current, R = resistance

Make R the subject of the equation

R = V/I.................. Equation 2

Given: V = 12 V, I = 5 amp.

Substitute these values into equation 2

R = 12/5

R = 2.4 ohms

Explanation:

The forces acting on a massless object (spring, hook, string or wire, if considered massless) will always balance. Balanced forces acting on an object cause it to compress or stretch. The forces acting on a mass will never cancel.

The scientist responsible for the modern periodic table that we study today is Dmitri Mendeleev. Mendeleev was a Russian chemist who lived in the 19th century. He is often credited as the creator of the periodic table because of his significant contributions to its development.

In the mid-1860s, Mendeleev was working on organizing the known elements based on their chemical properties. He noticed that there was a recurring pattern in the properties of the elements when they were arranged in order of increasing atomic mass. Mendeleev proposed that these elements could be arranged in a table format, where elements with similar properties would fall into the same groups or columns.

Mendeleev's breakthrough came when he realized that there were some gaps or missing elements in his proposed table. Instead of discarding these gaps, he made a bold move and predicted the existence and properties of the yet-to-be-discovered elements. He left spaces for these elements, specifying their properties based on the patterns he observed.

What made Mendeleev's periodic table significant was that it not only organized the elements based on their atomic masses but also successfully predicted the properties of the missing elements. Over time, his predictions were proven correct when the missing elements were discovered and found to match Mendeleev's descriptions.

Mendeleev's periodic table formed the foundation for the modern periodic table that we use today. Although there have been some modifications and improvements to the table since Mendeleev's time, his work laid the groundwork for understanding the periodicity and organizing the elements based on their properties. His contributions to the field of chemistry and the development of the periodic table have had a lasting impact on our understanding of the elements and their relationships.

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The displacement on x-axis is 75 cm and the distance that moved by the child is 80 cm

We are given that,

Starting point of child = d₁ = 10cm

Reaching point of the child = d₂ = 70cm

Move back = 5cm

Therefore, total distance covered by a child can be given as,

Δd = 10cm + 70 cm = 80 cm

Thus, the total distance is 80cm and a child moves back 5cm then the displacement would be given as,

Displacement = total distance cover - distance move back

Displacement = 80cm - 5 cm = 75 cm

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The first two steps for finding the magnitude of the resultant vector is find the sum of the two horizontal vectors and the sum of the two vertical vectors.

The resultant of two vectors is determined from Pythagoras theorem is as shown below.

R² = a² + b²

Thus, the first two steps for finding the magnitude of the resultant vector is find the sum of the two horizontal vectors and the sum of the two vertical vectors.

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The contact angle between the mercury and the glass is approximately 19.3 degrees. The density of the paraffin oil is approximately 840 kg/m³.

Contact Angle with Mercury:

To determine the contact angle between mercury and the glass, we need to use the Young-Laplace equation:

P = Tm * (1/R1 + 1/R2) * cos(theta)

Where:

P is the pressure difference between the inside and outside of the capillary,

Tm is the surface tension of mercury,

R1 and R2 are the principal radii of curvature of the meniscus,

and theta is the contact angle.

In this case, the pressure difference is given by the hydrostatic pressure difference due to the height difference of the mercury column inside the capillary.

Given data:

Tm (surface tension of mercury) = 0.4 N/m,

Height difference = 0.5 cm

= 0.005 m,

Diameter of the capillary = 2 mm

= 0.002 m.

The radius of the capillary (r) = diameter/2

= 0.001 m.

The radius of curvature (R1 or R2) = r/2

= 0.0005 m.

The pressure difference (P) is given by the hydrostatic pressure difference:

P = rho_m * g * h

Where:

rho_m is the density of mercury,

g is the acceleration due to gravity,

h is the height difference.

Given data:

rho_m (density of mercury) = 13.6 x 10³ kg/m³,

g (acceleration due to gravity) = 9.8 m/s².

Substituting the values into the equation, we get:

P = (13.6 x 10³ kg/m³) * (9.8 m/s²) * (0.005 m)

= 0.6668 kPa.

Now, we can rearrange the Young-Laplace equation to solve for the contact angle (theta):

cos(theta) = (P * R1) / Tm

Substituting the values, we get:

cos(theta) = (0.6668 kPa * 0.0005 m) / 0.4 N/m

= 0.8335.

Taking the inverse cosine (arccos) of both sides, we find:

theta = arccos(0.8335)

= 19.3 degrees.

Therefore, the contact angle between the mercury and the glass is approximately 19.3 degrees.

Density of Paraffin Oil:

To calculate the density of paraffin oil, we can use the same principle as the previous calculation.

Given data:

Surface tension of paraffin oil (Tpo) = 0.245 N/m,

Rise in the glass capillary (hpo) = 7.3 cm

= 0.073 m.

Using the Young-Laplace equation:

Ppo = Tpo * (1/R1 + 1/R2) * cos(theta)

As before, the pressure difference (Ppo) is given by the hydrostatic pressure difference:

Ppo = rho_po * g * hpo

Where:

rho_po is the density of paraffin oil.

Substituting the values, we get:

rho_po * g * hpo = Tpo * (1/R1 + 1/R2) * cos(theta)

Rearranging the equation to solve for the density of paraffin oil, we have:

rho_po = (Tpo * (1/R1 + 1/R2) * cos(theta)) / (g * hpo)

Substituting the known values, we get:

rho_po = (0.245 N/m * (2/0.002 m⁻¹ + 2/0.001 m⁻¹) * cos(0.8335)) / (9.8 m/s² * 0.073 m)

Calculating the expression, we find:

rho_po ≈ 840 kg/m³.

Therefore, the density of paraffin oil is approximately 840 kg/m³.

The contact angle between the mercury and the glass capillary is approximately 19.3 degrees. Additionally, the density of paraffin oil is approximately 840 kg/m³. These calculations were made using the Young-Laplace equation and considering the hydrostatic pressure difference due to the height difference.

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Answer:

s = d/t

s = 230/2

s = 115 mph

Explanation:

Average Speed (s) = Distance travelled (d) / Time elapsed (t)

To increase the force required to move an object without change mass is : To increase the acceleration of the object

Given that Force = Mass * acceleration

An increase in the acceleration of an object in motion will result in a proportional increase in the Force required to move the object becasue force of an object is directly proportional to the acceleration of an object.

Hence we can conclude that To increase the force required to move an object without change mass is To increase the acceleration of the object.

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Answer:

W = m g h      increase in PE due to lfting bag

W1 = 90 kg * 9.8 m/s^2 * 6 m

W2 = 45 kg * 9.8 m/s^2 * 12 m

W2 / W1 = 1        the work is the same in both cases

The power required is different

P = W / t

Since t is smaller for W2 and the work output is the same the power required to produce W2 is twice as great

Explanation:

1. the potential difference of each capacitors is the same.

Answer:

Label A: red

Label B: yellow

Label C: green

Label D: blue

Label E: violet/purple

I think this should be correct. I'm sorry if I'm incorrect

Based on the degree of refraction from least to most refracted, the colors are as follows: Red, Orange, Yellow, Green, Blue, Indigo, Violet.

Refraction of light is the bending of light rays as they cross the boundary between two media of different densities.

White light consists of seven colors of light; Red, Orange, Yellow, Green, Blue, Indigo, Violet.

The red color has the shortest wavelength and is the least refracted while violet color has the longest wavelength and is most refracted.

Therefore, based on the degree of refraction from least to most refracted, the colors are as follows: Red, Orange, Yellow, Green, Blue, Indigo, Violet.

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Answer:

\(1.4*10^-7N\)

Explanation:

Step one:

given data

mass m1= 87 kg

mass m2=60kg

sitting distance r= 0.5m

The gravitational constant G= 6.67*10^-11Nm^2/kg^2

Required

The Force of attraction between the two bodies

Step two:

Applying the formula for the force of attraction by gravity on two  bodies

\(F=\frac{Gm1m2}{r^2}\)

substituting our data we have

\(F=\frac{6.67*10^-^1^1 *87*60}{0.5^2}\\\\F=\frac{3.48174*10^-^7}{0.25^2}\\\\F=1.4*10^{-7}N\)

The length of the starship rocket as observed by the observer would be approximately 54.5 m.

The closest answer choice is B, 53 m.

According to special relativity, the length of an object moving at a high velocity relative to an observer will appear shorter than its rest length. This effect is known as length contraction.

The formula for length contraction is:

L = L0 / √(1 - v²/c²)

where;

L0 is the rest length of the object,

v is its velocity relative to the observer,

c is the speed of light, and

L is its observed length.

In this case, the rest length of the starship rocket is 50 m and its velocity relative to the observer is 0.4 c. Plugging these values into the formula, we get:

L = 50 / √(1 - (0.4c)²/c²)

L = 50 / √(1 - 0.16)

L = 50 / √(0.84)

L = 50 / 0.917

L ≈ 54.5 m

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its should be 2.0 and 4.5 on it

Answer:A

Explanation:I’m taking the test rn and I got it correct

It is a conductor that allows charge to move freely through it.

Resistivity is a distinctive attribute of any material that may be used to compare different materials based on how well they conduct electric currents. Low conductivity is indicated by high resistance.

The Greek letter rho is frequently used to represent resistance, which is numerically equivalent to the resistance R of a wire-like specimen, multiplied by its cross-sectional area A, and divided by its length.

The ohm is the measurement of resistance. The ratio of area in square meters to length in meters is reduced to merely meters in the metre-kilogram-second (mks) method.

Therefore, It is a conductor that allows charge to move freely through it.

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Answer:

The answer is d

Explanation:

Because he is from the same species

Answer:

D

Explanation:

Answer:

16kg*m/s west

Explanation:

P=M*V

Momentum= Mass time velocity, plug it into the formula,

M is 4 and V is 4, 4*4=16, and since the object is moving west its going to be west.

basically saying in simpler terms,

16=4*4

If the metal sphere is positively charged, then the excess electrons will move to the metal sphere. But if it's negatively charged, the excess electrons will repel the metal sphere.

Answer:

Alice Distance = 100 meters

Peter's Distance = 3 km

Alice Displacement and Peter's displacement are both 100 meters upwards.

Explanation:

To solve this question, we have to first define distance and displacement.

Distance is simply the measurement of the sum of all paths travelled from one point to another while displacement is measurement of the shortest distance from initial point to final point.

Now, Alice and Peter are moving from the same point.

Alice distance travelled is 100 meters.

Also, her displacement will be 100 meters because it is the shortest distance to the summit of the cliff.

Now, for Peter, he decides to take a longer route which is 3 km in distance.

However, the shortest path which is the displacement is still 100 meters.

Thus, Peter's displacement is 100 meters.

Answer:

but the answer should be no as if 3 bulbs are connected together if one burns out the whole circuit will stop .hope you understood

please mark me as brainlist

The magnitude of the impulse required to change the velocity of the 600 gm body is approximately 6.90 N·s, and its direction is (-0.696i + 0.696j + 0.174k).

To calculate the impulse, we use the formula J = m * Δv, where J is the impulse, m is the mass, and Δv is the change in velocity. Given the initial velocity (u) as 3i - 6j + k m/s and the final velocity (v) as -5i + 2j + 3k m/s, we find the change in velocity as Δv = v - u, resulting in Δv = -8i + 8j + 2k. Multiplying this by the mass of 0.6 kg, we get J = -4.8i + 4.8j + 1.2k N·s. The magnitude of the impulse is determined as |J| ≈ 6.90 N·s, and the direction is obtained by normalizing  the vector J, giving the direction as (-0.696i + 0.696j + 0.174k).

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The friction force acting on the block by the ground is approximately 35.2 N.

The block of mass 20 kg is acted upon by a force F = 30 N at an angle of 53 degrees with the horizontal in a downward direction. The coefficient of friction between the block and the horizontal surface is 0.2, and the gravitational acceleration (g) is 10 m/s^2.

To determine the friction force acting on the block, we first need to find the normal force and the horizontal component of the applied force. We can do this using trigonometry and Newton's laws.

The vertical component of the applied force is Fv = F * sin(53°), which is approximately 24 N. The weight of the block is W = mg, or 20 kg * 10 m/s^2, which equals 200 N. The normal force (N) is the sum of the vertical component of the applied force and the weight of the block, so N = 200 N - 24 N, which equals 176 N.

The horizontal component of the applied force is Fh = F * cos(53°), which is approximately 18 N. The friction force (Ff) can be calculated using the equation Ff = μ * N, where μ is the coefficient of friction. Therefore, Ff = 0.2 * 176 N, which equals 35.2 N.

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Ungrounded alternating-current systems from 50v to 1,000v or less that are not required to be grounded in accordance with article 250.20(b) shall have ground detectors installed.

The current systems is known to be a kind of techniques that are often used to examine the current systems and know the extent of support given to the set of business activities.

A ground detector is known to be a tool that is often use to be able to know or detect conductor insulation that are said to be resistance to ground.

Note that the ground detection is also a sensing equipment that is linked as close as possible to where the system gets  its supply and as such, Ungrounded alternating-current systems from 50v to 1,000v or less that are not required to be grounded in accordance with article 250.20(b) shall have ground detectors installed.

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To calculate the potential energy of the system consisting of three particles, each with a mass of 7.00 g, located at the corners of an equilateral triangle with sides of 30.0 cm, we can use the formula for gravitational potential energy.

Explanation:

The potential energy  The formula for gravitational potential energy is given by \(PE = -G * (m1 * m2) / r\), where G is the gravitational constant (approximately  \((6.674 × 10^(-11) N*m^2/kg^2),\) ) m1 and m2 are the masses of the particles, and r is the distance between them.

Since all three particles have the same mass of 7.00 g (or 0.007 kg) and are located at the corners of an equilateral triangle, the distance between them is equal to the side length of the triangle, which is 30.0 cm (or 0.30 m).

Calculating the potential energy for each pair of particles and summing them up, we get:

\(PE = -G * (m1 * m2) / r = -6.674 × 10^(-11) * (0.007 * 0.007) / 0.30 = -3.933 × 10^(-12) J.\)

Therefore, the potential energy of the system is approximately \(-3.933 × 10^(-12) Joules.\)

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Answer:

divide the number of times the event occurs by the length of time.

Explanation:

Answer:

Density is directly proportional to mass

Density is inversely proportional to volume

Answer:

degrees

Explanation:

If a direction is somewhere between north and east, it is measured in degrees.

This measurement will be possible thanks to the existence of geographical coordinates that are some 'imaginary lines' that help us find our location on the earth's surface. These lines are called latitude and longitude, both of which are measured in degrees.

It is like a sea battle game where you have to combine the rows and columns in order to identify where the targets are located. Geographic coordinates work the same way, you must combine the rows and columns of the planisphere to identify the locations of the planet. So the lines would be the latitudes and the columns the longitudes.

Answer:

A to B is in constant speed. b to c is speeding up. c to d is not moving. d to e is slowing down.

Explanation:

a to b is at a constant rate of acceleration. (It is speed up but it is doing it consistantly) The line is curving upwards means it is speeding up just not consistantly like a to b. c to d is not going up or down which means it is not in motion. d to e is slowing down because the line curvs down ward.

A to B is at a constant pace. b to c is rushing up. c to d isn't always transferring. d to e is slowing down.

The graph on which the immediate position x of a particle is plotted at the y-axis and the time t at the x-axis is known as the location-Time graph.

The precept is that the slope of the road on a position-time graph exhibits beneficial records about the rate of the object. it's miles frequently stated, "because the slope goes, so is going the rate." anything characteristic the speed has, the slope will exhibit the same.

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As the two socks are being spun too slowly, they are probably not going to stick together since the static charge would be too small to cause them to adhere.  

An imbalance in the charged particles of the thing is what causes static electricity, according to this definition. Until they are released or discharged, these charges remain on the object's surface. Static electricity is produced at the surface of the object as a result of these charges.

When a dryer's electricity supply is turned on, clothing spin faster and become stuck to one another, creating friction force between them. When the supply gets off, the spinner stopped its movement and the result is the static electricity that causes the socks to stuck together.

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