marci and juan are on opposite ends of a seesaw. although they have different masses, the seesaw balances because the net torque is

Answer:

where is the box? how can we answer if your question is lack given? how do we know what box is it your talking about

The charge-to-mass ratio in the second case is 4 times less because of e/M = 0.96x10⁸ N.

The electron beam that travels from the negatively charged cathode to the positively charged anode at the opposite end of the vacuum tube is known as a cathode ray.

As the electron, J. J. Thomson showed that the same beam deflections resulted in tubes having cathodes made of different materials and containing various gases before evacuation.

The elect's load = 1.6x10⁻¹⁹ C

The mass = 9.1x10⁻³¹ kg

e/m = 1.6x10⁻¹⁹/ 9.1x10⁻³¹ = 0.1 758 10 10¹² N

The homogenize has an electron of charge of 1.6x10⁻¹⁹ C

The mass M = 1.673x10⁻²⁷ ka

e/M = 1.6x10⁻¹⁹/1.67x10⁻²⁷ = 0.96x10⁸ N

In the second case, it is 4 times less

Thus, the charge-to-mass ratio in the second case is 4 times less because of e/M = 0.96x10⁸ N.

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Sure, I can help you with that. To find the final velocity of the keen physics student, you need to use the formula for final velocity under constant acceleration:

\($$v = u + at$$\)

where:

- \($v$\) is the final velocity

- \($u$\) is the initial velocity

- \($a$\) is the acceleration

- \($t$\) is the time

Plugging in the given values, we get:

\($$v = 3.4 + 0.55 \times 3.7$$\)

\($$v = 5.435$$\)

Therefore, the final velocity of the keen physics student is 5.435 m/s I hope this helps!

Answer:

d

Explanation:

When a teacher mixed zinc (Zn) with hydrogen chloride (HCl), one or more new substances formed. Hence, option (d) is correct.

A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.

Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present).

The study of chemical processes involving unstable and radioactive elements, where both electronic and nuclear changes may take place, is known as nuclear chemistry.

When the teacher mixed zinc (Zn) with hydrogen chloride (HCl), chemical reaction happens and more than one new substances formed.

2Zn + 2HCl → 2ZnCl + H₂

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Answer:

Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation:

Answer:

In a chemical reaction, the products are the substance present after the reaction.

Explanation:

The current of the circuit would be 3.22 x 10⁻⁴⁴ A in the laboratory.

Current refers to the flow of electric charge in a circuit. It is measured in units of amperes (A) and is typically represented by the symbol "I" in equations. The flow of current is caused by the movement of electrons in a conductor. The direction of current flow is conventionally taken to be the direction in which positive charge would move. Electric current can be either direct current (DC), in which the electric charge flows in one direction, or alternating current (AC), in which the electric charge changes direction periodically.

To find the current of the circuit, we need to use the formula for current:

I = Q / t

Where I is the current, Q is the charge, and t is the time.

Given that 1.1 x 10⁻⁴⁰ C of charge is measured to pass through the resistor on 3412 s, we can plug in these values and solve for I:

I = (1.1 x 10⁻⁴⁰ C) / (3412 s)

I = 3.22 x 10⁻⁴⁴  A

So the current of the circuit is 3.22 x 10⁻⁴⁴  A.

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Answer:

Here is your answer

Hope it helps

The answer is xcos x + sin x

Explanation:

d/dx (xsin x)

= x d/dx (sin x) + sin x d/dx (x)

= xcos x + sin x (1)

= xcos x + sin x

Thus, The answer is xcos x + sin x

-TheUnknownScientist

Explanation:

there are many things. I am not sure what your teacher told you.

one of the first strange observations leading to this conclusion was the "loop-di-loop" in the track of Mars. because of the different orbits of Earth and Mars, sometimes one (particularly Earth as the faster one) swings around the sun in relation to the other, and with that first moves away and suddenly moves closer again, making the track of Mars appear on Earth as if it would make a loop in the sky.

Answer:

The velocity of the seeds relative to the ground as they travel through the air is V = +2.6 m/s

Explanation:

Let V be the velocity of the seeds relative to the ground, v be the velocity of the seeds relative to the farmer and v' be the velocity of the farmer relative to the ground.

By vector addition, V = v + v'

Since  v = the velocity of the seeds relative to the farmer = +2.1 m/s and

v' = the velocity of the farmer relative to the ground = +0.5 m/s

Then,

V = v + v'

V = +2.1 m/s + (+0.5 m/s)

V = +2.6 m/s

So, the velocity of the seeds relative to the ground as they travel through the air is V = +2.6 m/s

wavelength = 675 nanometer

Therefore,

Answer:

well I mean it would depend on where u live for this question that's the only reason I am confused.. I'm pretty sure it's A thi

The 1100 lm light bulb could be placed approximately 2.24 m away and still provide the same illuminance as the 800 lm light bulb at 2 m.

The total amount of energy emitted by a star or other celestial object per second is expressed as luminosity, abbreviated L. So, this is how much power a star produces. A star's bolometric luminosity is its total power output at all wavelengths.

Illuminance is the measure of the amount of light that falls on a surface per unit area, and it is given in units of lux (lx).

The illuminance E at a distance d from a point light source of luminous flux Φ (in lumens) is given by the formula:

E = Φ / (4πd²)

In this problem, we are given the luminous flux of two light bulbs and the distance of one of them, and we need to find the distance at which the illuminance is the same for both.

For the 800 lm bulb at a distance of 2 m, the illuminance is:

E1 = 800 lm / (4π(2 m)²) = 25.45 lx

To find the distance at which the 1100 lm bulb provides the same illuminance, we can set E₂ = E₁ and solve for d:

1100 lm / (4πd²) = 800 lm / (4π(2 m)²)

Simplifying, we get:

d = √(1100/800) * 2 m

d ≈ 2.24 m

Therefore, the 1100 lm light bulb could be placed approximately 2.24 m away and still provide the same illuminance as the 800 lm light bulb at 2 m.

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Answer:

To find out how long it will take a car to cover 870 miles at a speed of 35 miles per hour, we can use the formula:

time = distance ÷ speed

Plugging in the given values, we get:

time = 870 miles ÷ 35 miles per hour

Simplifying the right side by dividing 870 by 35, we get:

time = 24.86 hours

Rounding to the nearest hour, the answer is:

time = 25 hours

Therefore, it will take the car approximately 25 hours to cover a distance of 870 miles at a speed of 35 miles per hour.

Answer:

Teniendo dos tuberías, una hueca y otra sólida, con la misma masa, radio y longitud, ambas poseen la misma rapidez angular, entonces el cuerpo hueco tendrá mayor energía cinética rotacional que la tubería sólida, esto es debido a que el tubo hueco tiene mayor inercia rotacional.

La ecuación de energía rotacional viene dada como:

Er = (1/2)·I·ω

De esta manera tenemos que el tubo hueco tiene mayor inercia rotacional que el tubo sólido, por ende, mayor energía.

Explanation:

Answer:

A) Conduction

Explanation:

The mitt keeps the heat from reaching your hand through conduction

Answer: A.conduction

Explanation: i got it right on my test!

Answer:

v = 0.69 m/s

Explanation:

Given that,

A ball is dropped from a height of 52 m.

The ball reaches the ground in 75 seconds

We need to find the average speed of the ball. The ball will travel a distance of 52 m in 75 s. The average speed of the ball is distance divided by time taken. So,

\(v=\dfrac{52\ m}{75\ s}\\\\v=0.69\ m/s\)

Hence, the average speed of the ball is 0.69 m/s.

A wave with a frequency of 1000 hertz vibrates at 1000 cycles per second. Therefore, the correct answer is B) 1000 cycles per second.

Frequency refers to the number of cycles or vibrations of a wave that occur in one second. In this case, a wave with a frequency of 1000 hertz means that it completes 1000 cycles or vibrations in one second. Since the frequency is specifically 1000 hertz, it vibrates at precisely 1000 cycles per second.

When we say a wave has a frequency of 1000 hertz, it means that in one second, the wave completes 1000 cycles or vibrations. This frequency indicates the rate at which the wave oscillates or repeats its pattern.

So, if we consider a time interval of one second, during that time the wave will go through 1000 complete cycles. Each cycle represents one complete vibration of the wave, from its starting point to its peak, back to its starting point, and then to its trough.

Therefore, a wave with a frequency of 1000 hertz vibrates at a rate of 1000 cycles per second. This is why the correct answer is B) 1000 cycles per second.

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Answer:

2.82 m/s²

Explanation:

\(v = u + at \\ 24 = 0 + a(8.5) \\ a = 2.82 \: ms {}^{ - 2} \)

The acceleration of a motorcycle is 2.82 m/s^2.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Given that:

Initial velocity of the motor cycle: u = 0 m/s.

Final velocity of the motorcycle = 24 meter/second.

Time taken to reach this velocity = 8.5 second.

Hence, acceleration of the motor cycle = change in velocity/time interval

= ( final velocity - initial velocity)/time interval

= ( 24 m/s  - 0 m/s)/8.5 s

= 2.82 m/s^2.

Its acceleration is 2.82 m/s^2.

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Answer:

Efficiency of a machine is defined as the ratio of output work to input work in a machine . It is expressed in percentage and denoted by

η ( eta).

Answer:

B

Explanation:

The tangential speed which ,the bob  must have so that it moves in a horizontal circle with the string always making an angle θ from the vertical is v = Sin θ ( \(\sqrt[]{Lg/Cos}\) θ)

The linear component of any object's speed that moves in a circle is its tangential speed. At the point when an item moves in a roundabout way a good ways off r from the middle, then the body's speed is coordinated digressively at any moment.

From free body diagram of the bob, tension in x and y is calculated using,

T Cos(θ) = mg

T Sin(θ) =  mv²  / r

Solving the given equation to find tangential speed we get ,

T Cos(θ) /TSin (θ) = mv² / r(mg)

Tan(θ) = v²/ rg

v = (\(\sqrt[]{rgtan}\)θ)

r = L Sin θ

v = Sin θ ( \(\sqrt[]{Lg/Cos}\) θ)

The above equation is the tangential speed, v , that the bob must have so that it moves in a horizontal circle with the string always making an angle θ from the vertical axis.

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(A) The Flix takes 1.5 seconds to reach his top speed of 4 m/s. (B) Flix moved a distance of 3.75 meters while he was accelerating.

To solve this problem, we can use the equations of motion to calculate the time and distance traveled by Flix the cat.

To determine the time it takes for Flix to accelerate, we can use the equation;

v = u + at

Where;

v = final velocity (4 m/s)

u = initial velocity (1 m/s)

a = acceleration (2 m/s²)

t = time

Rearranging the equation, we have;

t = (v - u) / a

Substituting the given values;

t = (4 m/s - 1 m/s) / 2 m/s²

t = 3 m/s / 2 m/s²

t = 1.5 s

Therefore, Flix takes 1.5 seconds to reach his top speed of 4 m/s.

To determine the distance traveled while accelerating, we can use the equation;

s = ut + (1/2)at²

Where;

s = distance traveled

u = initial velocity (1 m/s)

t = time (1.5 s)

a = acceleration (2 m/s²)

Substituting the given values:

s = (1 m/s)(1.5 s) + (1/2)(2 m/s²)(1.5 s)²

s = 1.5 m + (1/2)(2 m/s²)(2.25 s²)

s = 1.5 m + (2 m/s²)(1.125 s²)

s = 1.5 m + 2.25 m

s = 3.75 m

Therefore, Flix moved a distance of 3.75 meters while he was accelerating.

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The maximum distance from the center of the disc where the coin can be placed without it slipping off is 3.7 cm.

Solution:

w = (2x21) rad/s

= (2 * 2π)  rad/s

12.566 rad/s

FBD of Coin in the frame of disk

fs                N      

<--------------·-----------------> radial force (man)

for not being slip

= \(F_{s}\) ≥ man

= \(M_{S} mg\)  ≥ \(mw^{2} r\)

= 0.6 * 9.8 ≥  (12.566)²r

= r ≥  0.037

rmax = 0.037 m

= 3.7cm

The coefficient of static friction is the ratio of the maximum static frictional force to the normal force between contact surfaces before they start moving. The static friction coefficient between two materials is considered a material constant. We present experiments showing that the ratio of shear force to the normal force required to move the contact body can be systematically varied by controllable changes in the external load configuration. Static friction is the force that hinders the motion of an object moving along a path. This friction occurs when two pieces of fabric slide over each other.

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Answer:

true

Explanation:

this is true, igneous rocks are formed from molten lava when it cools

Answer: True

Explanation:

The effect that changing plate separation and surface area has on your capacitor is that if the distance between the plates is increased then the capacitance of the capacitor will decrease. If the distance between the plates is decreased, then the capacitance of the capacitor will increase.

Similarly, if the surface area of the plates is increased, the capacitance of the capacitor will increase. If the surface area of the plates is decreased, the capacitance of the capacitor will decrease.The addition of a dielectric effect the capacitance by increasing the capacitance of the capacitor by a factor equal to the dielectric constant. The capacitance of the capacitor is given by the formula C = Kε0A/d  Therefore, the capacitance of the capacitor increases.Charge Q is stored on a capacitor in such a way that there is an equal and opposite charge on each plate. If the magnitude of the charge on one plate is q, then the magnitude of the charge on the other plate is -q.

The capacitance of a parallel-plate capacitor is given by the formula:C = ε0A/dWhere:C = capacitance of the capacitorε0 = permittivity of free spaceA = area of the platesd = distance between the platesIf the distance between the plates is increased, then the capacitance of the capacitor will decrease. If the distance between the plates is decreased, then the capacitance of the capacitor will increase.If the voltage across the equivalent capacitor is 3V, the charge on the equivalent capacitor is given by:Q = CeqV = (0.2F)(3V) = 0.6CIf the charge on the equivalent capacitor is 0.6C, the charge on capacitor C2 is given by:q2 = C2V = (0.05F)(3V) = 0.15CIf the charge on the equivalent capacitor is 0.6C, the charge on capacitor C3 is given by:q3 = C3V = (0.15F)(3V) = 0.45CTherefore, the capacitor that stores less charge is capacitor C2, because its capacitance is smaller than the capacitance of capacitor C3.

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You are unable to lift an object.

The Weight makes the object difficult to lift.

To calculate weight, we know from the formula that,

W=mg

Here in the formula,

w= the weight of the object.

m= mass of the object.

g= the acceleration due to gravity.

Also this is defined as force which acting on a object due to gravity. This kind of force usually it acts downwards.

This type of force has to overcome for it to be lifted up by individuals which is why Weight makes the object difficult to lift.

Now from the above discussion we can easily state that, The Weight is the property that makes the object difficult to lift.

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Answer:

It is not correct to conclude that one engine is doing twice the work of another just because it is generating twice the power. If one engine generates twice the power as the other, it may be generating the same amount of work in one half of the time.

Explanation:

It is not correct that the engine generating more power is doing more work. Because it is the time that differ between engines. The engine which generates twice power is completing the work within half time taken by the other engine.

Power is the rate of work done. When a force result in displacement of an object, it said to be work done on the object. The work done is a vector quantity and it is characterised by its magnitude and direction similar to the force.

Power is the ratio of change in work done to the change in time. Therefore, the more work done in a small time interval create the greater power.

The engine which is producing a power twice comparison to the other is completing the work in half of the time taken by the other engine. But, both might be doing the amount of work. Hence, the statement is wrong.

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Answer:

The upper fixed point, or steam point, is the temperature of pure boiling water at normal atmospheric pressure. Note that the fixed points are defined using common physical phenomena so that they can be easily reproduced.

Answer:

Steam point

Explanation:

The upper fixed point, or steam point, is the temperature of pure boiling water at normal atmospheric pressure.

If the bridge builders neglected to include expansion joints, then the bump that would form in the middle of the bridge when it expanded would be around 21 cm or 0.21 m.

Concrete is a rigid material and expands when exposed to heat and contracts when exposed to cold. Bridges are long structures and therefore have to withstand large temperature changes over their length. The lack of expansion joints means the bridge has no space to expand and therefore, the forces of expansion push against the bridge's walls. Since the bridge is a rigid structure, it will eventually crack under the pressure. The bump that would form in the middle of the bridge when it expanded would be around 21 cm or 0.21 m. This is because the bridge would expand from both sides towards the middle and the forces of expansion would be resisted by the bridge's walls. The resulting bump would be about 21 cm high and would be visible to drivers.

If the bridge builders neglected to include expansion joints, then the bump that would form in the middle of the bridge when it expanded would be around 21 cm or 0.21 m. Since concrete is a rigid material, it expands when exposed to heat and contracts when exposed to cold. Bridges have to withstand large temperature changes over their length. The lack of expansion joints means the bridge has no space to expand and therefore, the forces of expansion push against the bridge's walls.

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