two point charges, 3.0 c and –2.0 c, are placed 4.0 cm apart on the x axis. at what points along the x axis is (a) the electric field zero and (b) the potential zero?

Answer:

stationary in an electric field.

moving perpendicular to a magnetic field.

moving perpendicular to an electric field.

Explanation:

Negative charge: In physics, the term "negative charge" is defined as a phenomenon that consists of a surplus or different electrons in any field i.e magnetic or electric field.

However, the correct answer in the question above, would be:

"stationary in an electric field".

"moving perpendicular to a magnetic field".

"moving perpendicular to an electric field".

An electric circuit consists of a completer closed path (or paths) for electric current. A series circuit is a type of electric circuit in which there is a single current path.

Hence, the correct option is (2)

The given information includes the size of the plates, the charge on the plates, and the spacing between the plates. To find the electric field strength, we can use the formula:

E = V/d Where E is the electric field strength, V is the voltage between the plates, and d is the distance between the plates. In this case, the voltage between the plates can be calculated using the charge on the plates and the capacitance of the capacitor: V = Q/C Where Q is the charge on the plates and C is the capacitance of the capacitor. To find the capacitance, we can use the formula: C = ε₀A/d Where C is the capacitance, ε₀ is the permittivity of free space (a constant), A is the area of the plates, and d is the distance between the plates. Given that the plates are square with side length 2.90 cm, the area of each plate is: A = (2.90 cm)^2 = 8.41 cm² Converting the area to square meters: A = 8.41 cm² * (1 m/100 cm)^2 = 8.41 * 10^(-4) m² Now we can calculate the capacitance: C = (8.85 * 10^(-12) F/m)(8.41 * 10^(-4) m²)/(1.40 * 10^(-3) m) = 5.315 * 10^(-11) F Next, we can calculate the voltage: V = (±0.708 * 10^(-9) C)/(5.315 * 10^(-11) F) = ±13.312 V Finally, we can find the electric field strength: E = (±13.312 V)/(1.40 * 10^(-3) m) = ±9.508 * 10^3 V/m Therefore, the electric field strength inside the capacitor is ±9.508 * 10^3 V/m.

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It is difficult to push a beach ball underwater is that a force of up to 150% of its weight is required to submerge it.

The reason why it is difficult to push a beach ball underwater is that a force of up to 150% of its weight is required to submerge it. That's why a beach ball bounces back to the surface when you try to push it underwater.

What is buoyancy?

Buoyancy is the ability of an object to float in a fluid, which can be a gas or a liquid. The principle of buoyancy was discovered by Archimedes, a Greek mathematician, in the third century BC. He discovered that an object that is immersed in a fluid experiences a buoyant force that is equal to the weight of the fluid displaced by the object.

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Answer:

2.4m/s

Explanation:

Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not.

Ultraviolet Rays in the electromagnetic Spectrum Ultraviolet rays are a kind of electromagnetic radiation that extends from the visible light spectrum to the X-ray area.

Harmful rays have a long-term effect on humans, causing skin and eye problems. It is also a source of Vitamin C.

Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not,

Hence light from the ultraviolet flashlight harden the filling when light from the lamp does not.

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Answer:

electromagnetic radiation hopefully

Answer:

I think he answer is C but I could be wrong

Explanation:

brainliest plz

Answer:

d mark brainlyest

Explanation:

The incandescent lamp was a major innovation in the field of lighting, allowing for brighter and more controllable light than previous lighting technologies.

The lamp worked by passing an electric current through a filament, which heated up and emitted light.

Thomas Edison's invention of the incandescent lamp in 1879 was a major breakthrough in lighting technology and had a significant impact on many industries, including theatre, film, and photography.

The incandescent lamp also had a profound effect on society, improving quality of life by enabling longer work hours and increased leisure time and spurring further technological advances in lighting and electricity.

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Answer:

a c

Explanation:

During a certain time interval, the net work done on an object is zero joules. We can be certain that the object's final speed is same as its initial speed.

When the net work done on an object is zero, this indicates that the kinetic energy of the body has not changed which means that the object's final speed is same as its initial speed.

Since, we know from the Work energy Theorem that the Change in Kinetic energy is equal to the work done.

So, Zero work indicates that the kinetic energy has not varied which directly signifies that the speed has not change in the course of the interval.

Work is done by the force acting on the body which gets transferred in the kinetic energy of the body.

Kinetic energy is the energy produced due to the motion of the body in the system.

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Explanation:

v = u + at

8 = 0 + a (2) (u=0 at rest)

8 = 2a

a= 4 m/s²

Answer:

left side

Explanation:

It's smaller in length but still has a pretty close slope to the right side.

Answer:

Luge

Explanation:

The resistance of a circuit that contains two 50.0 Ω resistors connected in series with a 12.0 V battery is 100 Ω. The resistance of the circuit is equal to the sum of the individual resistors when they are connected in series.

In this case, two 50.0 Ω resistors are connected in series, resulting in a total resistance of 100 Ω. Resistance can be defined as the obstruction that electricity faces when it travels through a conductor. The greater the resistance, the less current is allowed to flow through the circuit. The following equation is used to calculate resistance: R = V / IWhere R is resistance, V is voltage, and I is current.

Resistance can also be calculated using Ohm's Law if we know the values of voltage and current. When resistors are connected in series, the total resistance of the circuit is equal to the sum of the individual resistors. This is expressed by the following equation:RT = R1 + R2 + ... + RNWhere RT is the total resistance of the circuit, and R1, R2, and RN are the individual resistors. In this case, the circuit contains two 50.0 Ω resistors connected in series.

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Answer:

by using formula,

wavelength= velocity/frequency

= 120/6

= 20 meter

Ans: 20 meter

Answer:

wavelength= velocity

= 120/6= 20 meter

Explanation:

To raise the automobile with a hydraulic lift, a force of approximately 19,000 N must be applied to the piston.

In a hydraulic lift, the principle of Pascal's law is applied, which states that pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and the walls of its container. By utilizing this principle, a smaller force applied to a smaller piston can generate a larger force on a larger piston.

In this scenario, the force needed to lift the automobile can be calculated using the formula:

\(\frac{F_{1}}{A_{1}} =\frac{F_{2}}{A_{2}}\)

where \(F_{1}\) is the force applied to the piston, \(A_{1}\) is the area of the piston, \(F_{2}\) is the force generated on the larger piston (required to lift the automobile), and \(A_{2}\) is the area of the larger piston.

Given the radius of the shaft (small piston) as 0.08 m and the radius of the piston as 0.01 m, we can calculate the forces applied and generated as follows:

\(A_{1} = \pi (0.08)^2\\A_{2}= \pi (0.01)^2\)

\(\frac{F_{1}}{A_{1}} =\frac{F_{2}}{A_{2}}\)

Simplifying the equation and substituting the values, we can solve for \(F_{2}\):

\(F_{2}=\frac{F_{1}A_{2}}{A_{1}}\)

Plugging in the values, we find:

\(F_{2}=\frac{F_{1} \pi (0.01)^2 }{ \pi (0.08)^2} \\F_{2}= \frac{F_{1}\times 0.0001}{0.0064} \\F_{2}= 0.015625 \times F_{1}\)

Given that the mass of the automobile is 1520 kg and the acceleration due to gravity is \(9.8 \hspace m/s^{2}\), we can equate \(F_{2}\) to the weight of the automobile:

\(F_{2}= mg\\0.015625\times F_{1}= 1520\times 9.8\)

Solving for \(F_{1}\), we find:

\(F_{1}\approx \frac{1520\times 9.8}{0.015624} \\F_{1} \approx 19072 \hspace N\)

Therefore, a force of approximately 19,000 N must be applied to the piston in order to raise the automobile using the hydraulic lift.

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As a result, 80k is the closest value to the resistance of R1.

The equivalent resistance of two resistors, R1 and R2, connected in series, is 180 ohms. They have an equivalent resistance of 40 Ohms when they are connected in parallel.

The formula for the overall resistance of a series circuit can be used to get the resistance of R1:

Rr = R1 + R2

At the point where Rr is 80 Ω, we can see that R2 has a resistance of 20 Ω, so:

80 Ω = R1 + 20 Ω

Solving for R1, we get:

R1 = 60 Ω

As a result, 80k is the closest value to the resistance of R1.

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When the light bulb with a resistance of 10 Ω is replaced by a bulb with 20 Ω of resistance, replacing the light bulb with a higher resistance would result in a decrease in current, brightness, power consumption, and heat generation in the circuit.

Here are the key changes:

1. Current: The current in the circuit would decrease. According to Ohm's Law (I = V/R), as the resistance increases and the voltage (V) remains constant, the current (I) decreases.

2. Brightness: The brightness of the bulb would decrease. Since the current is reduced, less electrical energy is flowing through the bulb, resulting in lower light output.

3. Power: The power consumed by the circuit would decrease. Power is calculated using the formula P = IV, where P is power, I is current, and V is voltage. As the current decreases, the power consumption of the circuit decreases.

4. Heat dissipation: The bulb with a higher resistance would generate less heat compared to the lower resistance bulb. This is because heat dissipation in a circuit is directly proportional to the square of the current (P = I²R), and with reduced current, less heat would be produced.

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(1) The force of gravity between the Earth and the satellite is 8.91 * 10^6 N.

(2)  The orbital period of the satellite is 6,132 seconds i.e. 1 hour and 42 minutes.

(3) The tangential velocity required to keep the satellite in orbit is approximately 7.94 km/s.

(4) The angular velocity of the satellite is 0.0011 radians per second.

(1)  The force of gravity between two objects can be calculated using Newton's law of universal gravitation. The formula is F = (G * m1 * m2) / \(r^2\), where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers. In this case, the mass of the Earth is much larger than the mass of the satellite, so we can consider the satellite's mass negligible compared to the Earth's mass. Plugging in the values, we get\(F = (6.67 \times 10^{-11} N m^2/kg^2) \times (5.97 \times 10^{24} kg) \times (900 kg) / (6,371,000 m)^2 = 8.91 \times 10^6 \ Newtons\)

(2) The orbital period of a satellite can be determined using Kepler's third law of planetary motion, which states that the square of the orbital period is proportional to the cube of the semi-major axis of the orbit. Since the satellite is orbiting at a radius equal to one Earth radius above the surface, the semi-major axis is the sum of the Earth's radius and the altitude of the satellite. Using the formula \(T = 2\pi \times\sqrt{(a^3 / (G \times M)}\), where T is the orbital period, a is the semi-major axis, G is the gravitational constant, and M is the mass of the Earth, we can calculate the value. Plugging in the values, we get \(T = 2\pi \times\sqrt{6,371,000}\) meters +\((6,371,000 \ m)^3 / (6.67 \times 10^{-11} N m^2/kg^2 \times 5.97 \times 10^{24} kg)\) = 6,132 seconds.

(3) The tangential velocity required to keep a satellite in orbit can be determined using the formula \(v = \sqrt{G \times M / r\) where v is the tangential velocity, G is the gravitational constant, M is the mass of the Earth, and r is the distance between the center of the Earth and the satellite. Plugging in the values, we get v = √((6.67 x 10^-11 N m^2/kg^2 * 5.97 x 10^24 kg) / \(v = \sqrt{\frac{(6.67 \times 10^{-11} N m^2/kg^2 \times 5.97 \times 10^{24} kg) }{(6,371,000 m + 6,371,000 m)}\)) = 7,906 m/sec.

(4) The angular velocity of a satellite in orbit can be calculated using the formula ω = v / r, where ω is the angular velocity, v is the tangential velocity, and r is the distance between the center of the Earth and the satellite. Plugging in the values, we get ω = 7,906 meters per second / (6,371,000 meters + 6,371,000 meters) = 0.0011 radians per second.

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Helium has the lowest boiling point of any substance, at 4.2 K. We have to find this temperature in C and F.

The boiling point of helium is 4.2 K, which is equivalent to -268.95°C or -452.11°F. To convert from Kelvin to Celsius, subtract 273.15 from the Kelvin temperature. Therefore, 4.2 K is equal to -268.95°C. To convert from Celsius to Fahrenheit, using the formula F = (C x 1.8) + 32. Therefore, -268.95°C is equal to -452.11°F.

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Answer:

Equation for general relativity

Explanation:

The sound level of the hair dryer is approximately 58 dB.

The formula for sound level (in decibels) is:

L = 10 log (I/I₀)

Where L is the sound level, I is the intensity of the sound wave, and I₀ is the reference intensity of 1 pW/m².

Substituting the given values:

L = 10 log (2.25 x 10⁻⁶ / 1 x 10⁻¹²) = 10 log (2.25 x 10⁶) ≈ 58 dB

Therefore, the sound level of the hair dryer is approximately 58 dB when the intensity of a sound wave emitted by a hair dryer is 2.25 µW/m² which is comparable to the noise level of a normal conversation.

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Answer:

μ = 0.125

Explanation:

To solve this problem, which is generally asked for the coefficient of friction, we will use the conservation of energy.

Let's start working on the ramp

starting point. Highest point of the ramp

         Em₀ = U = m h y

final point. Lower part of the ramp, before entering the rough surface

        \(Em_{f}\) = K = ½ m v²

as they indicate that there is no friction on the ramp

          Em₀ = Em_{f}

          m g y = ½ m v²

          v = \(\sqrt{2gy}\)

we calculate

          v = √(2 9.8 0.25)

           v = 2.21 m / s

in the rough part we use the relationship between work and kinetic energy

          W = ΔK = K_{f} -K₀

as it stops the final kinetic energy is zero

          W = -K₀

The work is done by the friction force, which opposes the movement

          W = - fr x

friction force has the expression

          fr = μ N

let's write Newton's second law for the vertical axis

         N-W = 0

         N = W = m g

we substitute

            -μ m g x = - ½ m v²

           μ = \(\frac{v^{2} }{2 g x}\)

Let's calculate

           μ = \(\frac{2.21^{2}}{2\ 9.8\ 2.0}\)

           μ = 0.125

A 8.0 kg box is released from rest at a height y0 = 0.25 m on a frictionless ramp. The box slides from the ramp onto a rough horizontal surface. The box slides 2.0 m horizontally until it stops.

What is the friction coefficient of the horizontal surface?

Answer: 0.125

Answer:

A magnet is used in a compass to show the direction.

Magnets are used in medical equipment.

Powerful magnets are used to lift objects

they are used in refrigerator, televisions, earphones etc

Answer:

1. they are used in medical equipment

2. they are used in dynamos

3. they are used in generators and motors

4. powerful magnets are used to lift heavy objects

5. they are used to prevent corrosion in a water heater

Answer: When you change lanes, follow these steps:

Turn on your signal.

Check your mirrors.

Check your blind spot by looking over your shoulder.

If it is safe, change lanes.

Turn off your signal after completing the lane change.

Explanation: urwellcome

Answer:

Turn on your turn signal, and check for cars behind and in front of you.

Explanation:

It is important to check for cars because you may crash and injure/die. So stay safe!

Answer:

Because these supernovae are formed by white dwarfs that explode when they reach a uniform accreted mass, the supernova peak luminosity is thought to be very consistant. This consistancy allows these supernovae to be used as standard candles to measure distances.

Answer:

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure.

Answer:

FeCl2 has a high melting point.

Explanation: