On January 22, 1943, the temperature in Spearfish, South Dakota, rose from −4°F to 45°F in just 2 minutes. What was the temperature change in Celsius degrees?


27.2 C°


40.1 C°


35.4 C°


18.7 C°

ANSWER:

2.98 cm

STEP-BY-STEP EXPLANATION:

Given:

Length wire (L) = 6 m

Current (i) = 1.513 A

magnetic field (β) = 4.085 mT = 4.085 x 10^-3 T

Magnetic field at the center of circular coil is given for the following formula:

The total length of wire in the coil is given by:

We replacing:

Therefore, the diameter in centimeters is equal to 2.98 cm

Answer:

1. Attacking the person

2. Stress fractures

Explanation:

If this helps this is on my opinion and I need do my best to help you:)

Answer:

Centrifugal Force = 45.65N

Explanation:

Given the following data;

Mass, m = 80kg

Radius = 487m

Velocity = 60km/h to m/s = 60*1000/3600 = 16.67m/s

To find the centrifugal force;

Centrifugal Force = mv²/r

Substituting into the equation, we have;

Centrifugal Force = 80*16.67²/487

Centrifugal Force = 80*277.89/487

Centrifugal Force = 2223.12/487

Centrifugal Force = 45.65N

Rain cell 1: 2 mm/hr, 3 km wide, absorption = 0.02 dB/km, Rain cell 2: 4 mm/hr, 3 km wide, absorption = 0.05 dB/km. The total propagation factor seen by the radar for a target at 12 km is 0.048 dB.

To calculate the total propagation factor (F2) at a range of 12 km, we need to consider the clear air absorption and the absorption due to the rain cells at different ranges.

Given information:

Clear air absorption at X-Band: 0.004 dB/km

Rain cell 1: 2 mm/hr, 3 km wide, absorption = 0.02 dB/km

Rain cell 2: 4 mm/hr, 3 km wide, absorption = 0.05 dB/km

To plot the propagation factor as a function of range, we'll calculate the contributions from each component and sum them up.

Clear Air Absorption:

At 12 km range, the clear air absorption factor is:

Clear air absorption = Clear air absorption coefficient * Range

= 0.004 dB/km × 12 km

= 0.048 dB

Rain Cell 1:

The rain cell 1 is located between 5 km to 8 km. Within this range, the absorption factor is constant at 0.02 dB/km.

We need to calculate the fraction of the rain cell coverage within the range of interest.

Fraction of rain cell 1 coverage = (Coverage within range of interest) / (Total rain cell width)

= (min(8 km, 12 km) - max(5 km, 12 km)) / 3 km

Since the range of interest is 12 km, the coverage within the range is:

Coverage within range of interest = min(8 km, 12 km) - max(5 km, 12 km)

= min(8 km, 12 km) - 12 km

= min(8 km, 12 km) - 12 km

= 8 km - 12 km

= -4 km (No coverage within the range)

Since there is no rain cell coverage within the range of interest, the propagation factor due to rain cell 1 is 0 dB.

Rain Cell 2:

The rain cell 2 is located between 8 km to 11 km. Similar to rain cell 1, we calculate the fraction of rain cell coverage within the range of interest.

Fraction of rain cell 2 coverage = (Coverage within range of interest) / (Total rain cell width)

= \(\frac{ (min(11 km, 12 km) - max(8 km, 12 km))}{3 km}\)

Within the range of interest, the coverage is:

Coverage within range of interest = min(11 km, 12 km) - max(8 km, 12 km)

= min(11 km, 12 km) - 12 km

= 11 km - 12 km

= -1 km (No coverage within the range)

Since there is no rain cell coverage within the range of interest, the propagation factor due to rain cell 2 is 0 dB.

Now, we can calculate the total propagation factor (F2) at 12 km by summing up the contributions:

F2 = Clear air absorption + Rain Cell 1 + Rain Cell 2

= 0.048 dB + 0 dB + 0 dB

= 0.048 dB

Therefore, the total propagation factor seen by the radar for a target at 12 km is 0.048 dB.

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The force that acts in a direction opposite to the motion of the moving object is called drag or air resistance.

Drag or air resistance is a force that acts on a moving object in a fluid medium, such as air or water, opposing its motion. It acts in a direction opposite to the motion of the object and is caused by the friction and pressure differences between the fluid and the object's surface. Drag force increases with the velocity of the object and its surface area, and it's usually modeled as a quadratic function of the velocity. For example, when a car is moving, the air resistance acts in the opposite direction of the car's motion, slowing it down. The drag force is not the only force that acts on the object, but it's one of the most significant forces acting on it, especially for objects moving at high speeds.

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Answer:

1.2 m/s^2

Explanation:

average acceleration = vf-vi/t = (15 m/s-0 m/s)/10 s = 1.2 m/s^2

If current is passed through two parallel conductors in the same direction and the conductors are placed near each other, they will​ attract each other.

Electric current can be defined as the flow of electrons.

Since electrons are easily removed from atom and are very mobile, the flow of electrons constitute an electric current.

Materials which allow electric current to flow through them are known as conductors. Examples of conductors are metals, and electrolytes.

On the other hand, materials which do not allow electric current to pass through them are known as insulators. Examples of insulators are wood and rubber.

The flow of current is known as electricity.

Parallel conductors with current flowing through them in the same direction are attracted to each other as a result of a magnetic field produced by the flow of current.

In conclusion, conductors allow electric current to pass through and the flow of current through a conductor produces a magnetic field.

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Answer:

To find the resultant velocity and direction of the boat, we need to use vector addition.

Let's consider the velocity of the boat as a vector in the east direction, with a magnitude of mph. We can represent this vector as follows:

v1 = mph, due east

Now let's consider the velocity of the wind as a vector in the northwest direction, with a magnitude of 10 mph. We can represent this vector as follows:

v2 = 10 mph, 45 degrees north of west

To find the resultant velocity, we can add the two vectors together using vector addition. We can break each vector into its x and y components as follows:

v1x = mph, v1y = 0

v2x = -7.07 mph, v2y = 7.07 mph

The negative sign in front of v2x indicates that the wind is blowing in the opposite direction to the boat's motion.

Now we can add the x and y components separately to get the resultant vector:

vx = v1x + v2x = 6.93 mph, east of north

vy = v1y + v2y = 7.07 mph, north

The magnitude of the resultant velocity is:

|v| = sqrt(vx^2 + vy^2) = sqrt((6.93 mph)^2 + (7.07 mph)^2) = 9.99 mph

The direction of the resultant velocity can be found by taking the inverse tangent of the ratio of the y-component to the x-component:

θ = tan^(-1)(vy/vx) = 45.03 degrees north of east

Therefore, the resultant velocity of the boat is 9.99 mph, 45.03 degrees north of east.

Explanation:

Object has a gravitational potential energy= 220J and height =8m, then the

mass of the object = 2.81kg

Energy acquired by an object due to the change in its position when it is present in a gravitational field is called gravitational potential energy. It can be also be said that gravitational potential energy is an energy that is related to gravity. Gravitational potential energy is stored in gravity batteries by lifting a mass to some particular height using a pump or motor. After the mass is lifted, it then stores gravitational potential energy depending on the mass of the object and also the height.

As given gravitational potential energy = 220 J

height = 8m

As we know that,

potential energy= mass* gravity* height

Therefore,

mass= potential energy/( gravity * height)

=220/(9.8 * 8)

mass = 2.81 Kg

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Answer:

fire

Explanation:

burning the the oil

Electromagnetic radiation is a form of energy that travels in waves and includes a wide range of frequencies and energies. Different types of electromagnetic radiation have varying amounts of energy associated with them.

In order of decreasing energy, the types of electromagnetic radiation you provided can be arranged as follows:

So, the correct order from highest to lowest energy is:

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Work is performed on products, and materials, labor, or overhead costs are added to products in a Processing Department.

In a process costing system, manufacturing expenses are accrued in the processing department. Any area inside an organization where work is done on a product and where materials, labor, and overhead expenses are added to the product is referred to as a processing department.

Two more qualities have to be included in processing departments. First, all units that travel through the processing department should have substantially the same activity done there. Second, the department's output need to be uniform. In process costing, each unit moving through the department is given the average cost of processing units for a certain period.

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Thorough inquiry and analysis of materials and sources to establish facts and reach new findings are known as resarch. False is the best answer from the choices provided

Thorough inquiry and analysis of materials and sources to establish facts and reach new findings.

It is false that researchers are required to evaluate and remark on the work of other researchers. It is not their responsibility - they do not have to do it,

But they may if they want to and if the author allows them to. However, they are not compelled to do so by law or anything else. They do it simply out of goodwill or genuine interest.

Hence False is the best answer from the choices provided.

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Answer: false

Explanation:

Answer:

The weak nuclear force perhaps?

Explanation:

the weak nuclear force is the fundamental force responsible for the radioactive decay of particles

The pressure in the narrow section of the pipe is 22.8 kPa.

What is Pressure?

Pressure is defined as the force per unit area applied on an object in a direction perpendicular to the surface of the object. It is measured in units of Pascal (Pa) in the International System of Units (SI), which is equivalent to one Newton per square meter (N/m²).

\($A_1V_1 = A_2V_2$\)
We know that \($V_1 = 5.00$\) m/s, \($A_1 = \pi(0.100\text{ m}/2)^2 = 0.00785$\) m², and \($A_2 = \pi(0.080\text{ m}/2)^2 = 0.00503$ m$^2$\). Substituting these values into the continuity equation gives:
\($0.00785 \times 5.00 = 0.00503 \times V_2$\\$V_2 = 12.4$ m/s\\$\frac{1}{2}\rho V_1^2 + P_1 = \frac{1}{2}\rho V_2^2 + P_2$\)
Substituting the given values, we get:
\($\frac{1}{2} \times 680 \times 5.00^2 + 200 \text{ kPa} = \frac{1}{2} \times 680 \times 12.4^2 + P_2$\\$P_2 = 262 \text{ kPa}$\)
Therefore, the pressure in the narrow section of the pipe is 262 kPa.

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The height attained is 4.13 m and we do not need to know the mass of the cart to solve the question.

The term mechanical energy refers to energy possessed by a body by virtue of its position or its state of motion. There are two kinds of mechanical energy which are;

For the question, kinetic energy is equal to potential energy hence;

mgh = 1/2 mv^2

We can cancel out m on both sides such that

gh =1/2v^2

h = 0.5v^2/g

h = 0.5(9)^2/9.8

h =4.13 m

We do not need to know the mass of the cart to solve the problem.

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Answer:

Batteries are systems that store chemical energy and then release it as electrical energy when they are connected to a circuit. Batteries can be made from many materials, but they all share three main components: a metal anode, a metal cathode and an electrolyte between them. The electrolyte is an ionic solution that allows charge to flow through the system. When a load, such as a light bulb, is connected, an oxidation-reduction reaction occurs that releases electrons from the anode while the cathode gains electrons

Explanation:

The work done by a conveyor belt motor can be expressed as the product of the force applied by the motor and the distance over which the force is applied.

W=Fd is the equation for work done by a constant force. In this equation, W represents the work done (measured in units of energy such as joules), F is the force applied (measured in units of force such as newtons), and d is the distance over which the force is applied (measured in units of length such as meters).

This equation states that the work done is equal to the product of the force applied and the distance over which it is applied. This equation applies to a wide range of physical systems, including conveyor belts, and is a basic equation used in physics and engineering.

However, over time, the work done by the motor can change due to a variety of factors such as internal friction and heating. As internal friction increases, the force required to move the belt increases, resulting in a decrease in the work done by the motor.

Additionally, as the motor heats up, its efficiency may decrease, leading to a reduction in the work done by the motor. Additionally, if the load on the conveyor belt changes, the work done by the motor will also change. These changes in work done by the motor can be monitored and compensated for through the use of sensors and control systems that monitor the conveyor belt's performance and adjust the motor's output as needed.

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Answer:

bbbbbbbbbbbbbbbbbbbbbb

Yes, melting lead into a liquid to form pellets is a physical change.

This is because the chemical composition of lead remains the same even after it has been melted and then solidified into pellets. In other words, the molecular structure of lead does not change during the melting process, but only the physical state of the material changes from a solid to a liquid and then back to a solid. This type of change is reversible and can be undone by cooling the lead pellets to their solid state. Therefore, melting lead to form pellets is an example of a physical change rather than a chemical change.

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--The complete Question is, Is lead melting into liquid to form pellets a physical change? --

Answer:

answer is 2 ms-2

Explanation:

v= 10.0 m/s

u=4.0 m/s

t=3.0 seconds

a=?

from equation, v= u+at

10.0 m/s =4.0 m/s + a × 3s

6 m/s. = 3a

6/3 = a

2.0 m/s-2 = a

6000bps is the maximum bit rate for a noiseless channel with a bandwidth of 3000 hz transmitting a signal with two signal levels.

What is the internet's bandwidth?

A network connection's maximum capacity to transfer data through a network connection in a specific amount of time is indicated by a measurement known as network bandwidth. The amount of bits, kilobits, megabits, or gigabits that can be transmitted in a second is typically used to describe bandwidth.

Contrary to popular belief, bandwidth refers to the quantity of data that may be delivered over a connection in a given length of time and is measured in megabits per second (Mbps).

Given two signal levels,

bandwidth of 3000 hz

Maximum bit rate will be 3000*2 i.e. 6000bps

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Answer:

The frequency of the wave is 5 Hz (Hertz), which means it oscillates or cycles 5 times in one second.

Explanation:

The frequency of a wave is the number of times the wave oscillates or cycles in a given period of time. The period of a wave is the time it takes for the wave to complete one cycle.

The period of the wave is given as 0.2 seconds. To calculate the frequency, we can use the formula:

Frequency (f) = 1 / period (T)

So in this case:

f = 1 / 0.2 seconds

The frequency of the wave is 5 Hz (Hertz), which means it oscillates or cycles 5 times in one second.

Formula for frequency:

\(f=\dfrac{1}{T}\)

frequency(measured in Hertz) = 1 / period(measured in seconds)

__________________________________________________________

Given:

\(T=0.2s\)

\(f=?\)

__________________________________________________________

Finding frequency:

\(f=\dfrac{1}{T}\)

\(f=\dfrac{1}{0.2}\)

__________________________________________________________

Answer:

\(\fbox{f = 5 Hertz}\)

The transition of an electron in the hydrogen atom that releases the emission of light happens when: there are electrons that quickly drop from the higher orbit to the lower. When those electrons drop, energy will be released in form of light emissions.

When hydrogen atom absorbs energy, their electron will be raised to a higher energy level. This condition is known as an excited state. Because the higher orbit has less stability, those electrons tend to revert to the lower orbital. The drops of the electrons will emit energy in the form of light emissions. Hydrogen atoms have an emission spectrum that is known as the Balmer series.

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Electromagnetic radiation is a sort of energy emission. This has two components, electrical and magnetic components, as is clear from the name. The radiation is hence known as electromagnetic radiation. In Fig. 1.1, it is depicted. From a very low frequency of 3 Hz to a very high frequency of 300 EHz (1 EHz = 1018 Hz), this radiation has a wide frequency range. Table 1.1 lists the metric prefixes along with their symbols.

The magnetic and electric vectors are perpendicular to one another and to the path of propagation. In Fig. 1, this is depicted. 1. Depending on the frequency, this electromagnetic spectrum is separated into different section

 Wavelength and Frequency Relationship

Wavelength

According , a wavelength is the separation between two crests or troughs. It is described in the "electronic spectrum" in terms of nm. 1 nm = 10−9 m. Radiation's energy and wavelength are inversely related. In other words, energy increases when the wavelength lowers and decreases when the wavelength grows.

In the IR spectrum, wavenumber, which has the SI value of cm1, is used in place of or v.

 The relationship between frequency and wavelength

where is the wavenumber, is the wavelength, c is the speed of light, and is the frequency of the radiation.

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If ocean temperatures are increasing under climate change, then it might alter the carbon cycle and therefore it may have negative outcomes on the biological pump.

The term biological pump makes reference to the mechanism by which inorganic carbon atoms can be fixed into organisms due to photosynthetic processes, which is key to maintaining the homeostasis of the biosphere.

Therefore, with this data, we can see that the increase in ocean temperature may impact on the state of equilibrium of the biosphere by altering the carbon cycle and consequently affecting the biological pump.

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Answer:

pressure

Explanation: pressure=force/area

Answer:

The quantities that can be measured are called physical quantities.....

The electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

To find the electric field strength at a distance 1.20 m on the x-axis, we can use Coulomb's law:

\($$F=k\frac{q_1q_2}{r^2}$$\)

where F is the force between two charges, q1 and q2 are the magnitudes of the charges, r is the distance between the charges, and k is the Coulomb constant.For a single point charge q located at the origin of the x-axis, the electric field E at a distance r is given by:

\($$E=\frac{kq}{r^2}$$\)  where k is the Coulomb constant.

So, let's calculate the electric field due to each charge separately and then add them up:

For the +2.0 C charge at x = 0, the electric field at a distance of 1.20 m is:\($$E_1=\frac{kq_1}{r^2}=\frac{(9\times10^9)(2.0)}{(1.2)^2}N/C$$\)

For the -3.0 C charge at x = 0.40 m, the electric field at a distance of 1.20 m is:

\($$E_2=\frac{kq_2}{r^2}\)

\(=\frac{(9\times10^9)(-3.0)}{(1.20-0.40)^2}N/C$$\)

The negative sign indicates that the direction of the electric field is opposite to that of the positive charge at x = 0.

To find the net electric field, we add the two electric fields\(:$$E_{net}=E_1+E_2$$\)

Substituting the values of E1 and E2:

\($$E_{net}=\frac{(9\times10^9)(2.0)}{(1.2)^2}-\frac{(9\times10^9)(3.0)}{(0.8)^2}N/C$$E\)

net comes out to be -1.5×10⁴ N/C.

Therefore, the electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

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