A power source of of 3.07 W produces an intensity of 5.18 W/m2. What must be the surface area that is vibrated?15.9 m²0.593 m²1.69 m²2.11 W

Answer:

Complete Question

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Answer:

The  electric field is  \(E = -1.3 *10^{-4} \ N/C\)

Explanation:

 From the question we are told that

    The linear charge density on the inner conductor is  \(\lambda _i = -26.8 nC/m = -26.8 *10^{-9} C/m\)

    The linear charge density on the outer conductor is

  \(\lambda_o = -60.0 nC/m = -60.0 *10^{-9} \ C/m\)

     The position of interest is r =  37.3 mm =0.0373 m

Now this position we are considering is within the outer conductor so the electric field  at this point is due to the inner conductor (This is because the charges on the conductor a taken to be on the surface of the conductor according to Gauss Law )

Generally according to Gauss Law

         \(E (2 \pi r l) = \frac{ \lambda_i }{\epsilon_o}\)

=>    \(E = \frac{\lambda _i }{2 \pi * \epsilon_o * r}\)

substituting values  

       \(E = \frac{ -26 *10^{-9} }{2 * 3.142 * 8.85 *10^{-12} * 0.0373}\)

       \(E = -1.3 *10^{-4} \ N/C\)

The  negative  sign tell us that the direction of the electric field is radially inwards

    =>   \(|E| = 1.3 *10^{-4} \ N/C\)

Take into account that the kinetic energy is given by the following formula:

where,

m: mass of the asteroid = 700*10^6 kg = 7*10^8 kg

v: speed of the asteroid = 19000 m/s

Replace the previous values of the parameters into the formula for K and simplify:

Hence, approximately 2.5*10^17 J of energy would be released when the asteroid impacts the Earth

Answer:

the answer is A because

from tate 4 dozen is 48 and from joe the sixth multiple of eight is 48

Based on the principles of heredity, some common medical conditions with a family history include hypertension, hemophilia, shortsighted ness, diabetes, etc.

A family history of a medical condition is a detailed history of members of a family who suffer from a particular disease of a medical condition.

Since characters are passed on from parents to offspring, sometimes certain diseases too are passed on from parents to offspring.

For example, a family may have a history of hypertension, this disease may be due t a defect in a gene, thus, all the offspring in that family who inherit this defect will suffer from the disease.

Other diseases that may be in a family include, hemophilia, shortsighted ness, diabetes, etc.

In conclusion, diseases that are found in a family occur due to the principles of heredity.

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Answer:

The box arrives first.

Explanation:

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According to the information, a solid sphere is an object that arrives at the bottom first. This is because it occupies less friction as compared to the box.

Friction may be defined as the resistance that is offered by the surfaces that are in contact when they move past each other. It is a type of force that opposes the motion of a solid object over another.

There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction. According to the context of this question, the sphere possesses less friction as compared to the box. This is because the box has an irregular surface that possesses high friction over the inclined surface.

Therefore, according to the information, a solid sphere is an object that arrives at the bottom first. This is because it occupies less friction as compared to the box.

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The current remains the same in all parts of a series circuit.

The correct option is B.

A circuit is a complete path for the flow of electric current.

A series circuit is a circuit that the component of the circuit are connected end-to-end and the flow of current is in one direction.

Another form of connection is the parallel connection in which current flows through alternate paths.

In a series circuit, the flow of current is constant and remains the same in all parts of a series circuit. However, the voltage across the circuit varies.

In a parallel circuit,  the voltage is constant and remains the same in all parts of a parallel circuit.  However, the flow of current across the circuit varies.

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Answer:  

Explanation:

Step one:

given data

period T= 3 milliseconds= 0.003

velocity v= 175m/s

wave lenght λ=?

Step two:

we know that f=1/T

the expression relating period and wave lenght is

v=λ/T

λ=v*T

λ=175*0.002

λ=0.525m

to cm= 0.525*100

=52.5cm

The wavelength of the wave is E) 52.5 cm

Answer:

1. S = d/t S = speed D = distance traveled T= time elapsed

Explanation:

i can answer more in a minute sorry!!

Answer:

The health hazard of directly going to these places to take direct readings and observations.

Explanation:

The Chernobyl accident was a catastrophic radioactive accidents, with an immediate fatal effect on some victims (mostly firemen and law enforcement officers). Scientists investigating the effects of the radiation left on the venues of the accident face a health risk if they intend to carry out a full scale on-field testing and experiment. Some of the relocated occupants of these places, that have long been relocated, have shown some health effect of the radiation. And scientist studying and working on these places for too long stand a risk of developing health complications if they are exposed to the radiations for too long.

Explanation:

mass m=1700 Kg

a = 1.20 m/s^2.

t_a= 1.50 sec

According to Newton's 2nd law the net force

\(F_{net} =ma\)

\(F_a=m(a+g)=1700(1.2+9.80)=1.87\times10^4 N\)

now,

\(F_{net} =0\\F_b= W =1700\times9.8 =1.67\times10^4 N\)

Answer:

Explanation:

Answer:

Protecting the Seashore

Seashore Conservation Code

When investigating a seashore it is important to remember that the welfare of the plants and animals must come first. If seaweeds are attached to rocks do not try to pull them off, just examine them where they are growing. Handle animals with great care, returning them to the place where they were found. Anemones and limpets are normally firmly stuck to rocks and any attempt to remove them may result in their death. Replace any large stones that are removed – animals that live on the underside soon die if left exposed.

Pollution Problems

Seas and seashores are under continual threat from pollution. Here are some examples:-

oil rigOil spills, either accidental or deliberate, have a devastating effect on marine life, especially seabirds. Black tar-like oil washed up on a rocky shore would obviously completely destroy the entire community of living things. Chemicals used to disperse oil spills on a shore may effectively clean up the oil, but they can also cleanse the shore of life! The best policy for marine life is to physically remove as much oil as possible and leave the rest to degrade naturally. A rocky shore will recover much more quickly if chemicals are not used.

Sewage and litter also upsets seashore ecosystem, making them unsightly and perhaps contaminated. Some litter can be dangerous to wildlife.

Toxic chemicals and radioactive waste - a cocktail of toxic chemicals have found their way into the sea over the years, affecting both marine and human life. For many years potentially deadly radioactive waste from nuclear power stations and other sources was disposed of in the sea, and beaches have been contaminated by accidental leakages from nuclear power stations.

Explanation:

Answer:

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Explanation:

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Answer:

800 meters per hour

Explanation:

800 meters per hour is the average speed of an airplane that travels from New York to Los Angeles, a total distance of 4800 km, in 6.0 hours.

The right sphere will acquire an equal and opposite net positive charge to balance the negative charge on the left sphere.

Since the left sphere is attracted to the positively charged rod, it means that the left sphere acquires a temporary negative charge due to induction.

The positive charge on the rod repels electrons in the left sphere, causing them to move away from the rod side and accumulate on the opposite side, resulting in a net negative charge on the left sphere.

According to the principle of charge conservation, the net charge on the system must remain zero. Therefore, the right sphere acquires an equal and opposite net positive charge to balance the negative charge on the left sphere.

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Answer:

60m/s

Explanation:

v=u+at

v=36+(2×12)

v=36+24

v=60m/s

Answer:

Voltage, V = 12 V.

Explanation :

It is given that,

The power for the high beam is, P = 60.0 watts

Current flowing, I = 5 A

Car headlights have both low beams and high beams. The high beams may be necessary when it is very dark outside.

So, the voltage required for the high beam is 12 V.

Answer:

10 m/s²

Explanation:

Acceleration is the slope of the velocity vs time graph.

At t = 1.0 s, the slope of the line is:

a = Δv/Δt

a = (20 m/s) / (2.0 s)

a = 10 m/s²

Answer:

10m/s2

Explanation:

Acceleration is defined as change in velocity over the time period

Now at 1second the velocity is 10m/s.

Hence the acceleration is V-U/t;

Where V is velocity at 10s and U is velocity when the object is at rest.

So we have;

Acceleration = 10-0/ 1 = 10m/s2

Answer:

1.95 x 10^8 m/s.

Explanation:

Answer:

the answer is 1.95 x 10^8 m/s

Explanation:

Between Kinetic energy and speed: The relationship is quadratic or parabolic. According to the kinetic energy formula, KE = 1/2 mv^2, the kinetic energy is proportional to the square of the speed.

Between potential energy and mass: The relationship is linear. The potential energy is directly proportional to the mass. In simple cases, the potential energy is given by PE = mgh, where mass (m) and height (h) are directly proportional.

Between pressure and volume: The relationship is inverse. According to Boyle's law, the pressure and volume of a gas are inversely proportional when temperature is constant. Mathematically, P1V1 = P2V2.

Between pressure and temperature: The relationship is linear. According to Charles's law, the pressure and temperature of a gas are directly proportional when volume is constant. Mathematically, P1/T1 = P2/T2.

Between displacement and velocity: The relationship is linear. Velocity is the rate of change of displacement with respect to time, so the two are directly proportional.

Therefore:

Answer:

Approximately 19034 years

Answer:

\(A_c=87.73*10^{21}m/s\)

Explanation:

From the question we are told that

\(r=5\times 10^{-11}\)

\(T=1.5 \times 10^{-16}\)

Generally the equation for velocity is mathematically given as

\(Velocity (v)=\frac{2 \pi r}{t}\)

\(V=\frac{2 \pi (5*10^{-11})}{1.5*10^{-16}}\)

\(V=\frac{2 \pi (5*10^{-11})}{1.5*10^{-16}}\)

Generally the equation for Centripetal acceleration is mathematically given as

\(A_c=\frac{V^2}{r}\)

\(A_c=(\frac{20.944*10^5)}{r5*10^{-11}}\)

\(A_c=87.73*10^{21}m/s\)

Answer:

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The release of infrared light from radioactive materials is what demonstrates light possessing wave characteristics.

This is defined as the propagation of disturbances from one place to another in an organized way.

The release of waves in a diffraction pattern is why option C was chosen as the most appropriate choice.

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Answer:

That is, electrical resistance–is a force that counteracts the flow of current. In this way, it serves as an indicator of how difficult it is for current to flow. Resistance values are expressed in ohms (Ω). Or electrical Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.

There are four factors that affect the resistance of a wire ( electrical resistant metal ) :

Resistance is proportional to length. If you take a wire of different lengths and give each a particular potential difference across its ends. The longer the wire the less volts each centimeter of it will get. This means that the 'electric slope' that makes the electrons move gets less steep as the wire gets longer, and the average drift velocity of electrons decreases. The correct term for this 'electric slope' is the potential gradient. A smaller potential gradient (less volts per metre) means current decreases with increased length and resistance increases.

Resistance is inversely proportional to cross-sectional-area. The bigger the cross sectional area of the wire the greater the number of electrons that experience the 'electric slope' from the potential difference. As the length of the wire does not change each cm still gets the same number of volts across it - the potential gradient does not change and so the average drift velocity of individual electrons does not change. Although they do not move any faster there are more of them moving so the total charge movement in a given time is greater and current flow increases. This means resistance decreases. This does not give rise to a straight line graph as cross sectional area is inversely proportional to resistance not directly proportional to it

Resistance depends on the material the wire is made of. The more tightly an atom holds on to its outermost electrons the harder it will be to make a current flow. The electronic configuration of an atom determines how willing the atom will be to allow an electron to leave and wander through the lattice. If a shell is almost full the atom is reluctant to let its electrons wander and the material it is in is an insulator. If the outermost shell (or sub-shell with transition metals) is less than half full then the atom is willing to let those electrons wander and the material is a conductor.

Resistance increases with the temperature of the wire. The hotter wire has a larger resistance because of increased vibration of the atomic lattice. When a material gets hotter the atoms in the lattice vibrate more. This makes it difficult for the electrons to move without interaction with an atom and increases resistance. The relationship between resistance and temperature is not a simple one.

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The compressive force that would be enough to produce a fracture is 4000 N.

We know that the femur is one of the most important bones that we have in the human body. In this case, we have been told that In the human femur, bone tissue is strongest in resisting compressive force, approximately half as strong in resisting tensile force, and only about one- fifth as strong in resisting shear force.

Then we know that;

Tensile force = 8000

The compressive force would be half of this magnitude as such;

Compressive force = 4000 N

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The amount required to operate the electric heater for one month is 1490.4 cents.

Electric heating is a process in which electrical energy is converted directly to heat energy at around 100% efficiency, using rather cheap devices.

To calculate the amount needed to operate the electric heater in 30 days, we use the formula below.

Formula:

Where:

From the question,

Given:

From the question,

Given:

Hence, The amount required to operate the electric heater is 1490.4 cents.

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The equivalent capacitance of this combination is 9.375 μF, or 9.375 × 10⁻⁶ F in scientific notation.

What is capacitor ?

A capacitor is an electronic component that stores electrical energy in an electric field. It consists of two conductive plates separated by a non-conductive material, called a dielectric. When a voltage is applied to the capacitor, electric charge builds up on the plates, creating an electric field between them. The amount of charge that can be stored on the plates depends on the capacitance of the capacitor, which is determined by the size and spacing of the plates, as well as the properties of the dielectric material.

When capacitors are in series, their effective capacitance is given by:

1/C_series = 1/C_1 + 1/C_2 + ...

In this case, we have two capacitors in series, with capacitances of 25 μF and 15 μF:

1/C_series = 1/25μF + 1/15μF

1/C_series = (15 + 25)/(1525μF²)

1/C_series = 40/(375*μF²)

C_series = 375*μF²/40

C_series = 9.375 μF

Therefore, the equivalent capacitance of this combination is 9.375 μF, or 9.375 × 10⁻⁶ F in scientific notation.

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The linear speed will be the insect be 0.5759 meter/second carried collision with the near stationary photograph.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Given that an insect lands 0.1m from the center of the turn table.

Rotational speed of the turn table = 55 rev/min

= (55×2π/60) rad/second

= 5.759 rad/second.

Hence, the speed of the insect be = Rotational speed × length

= 5.759 rad/second × 0.1 M.

= 0.5759 meter/second.

Therefore, the speed of the insect be 0.5759 meter/second.

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