Hi- I'm giving Brainliest for the best explanation to this.
If you were in a falling elevator, would you be able to jump up at the last second in order to survive? Please explain. I am so confizzled!
Thank you!

1.30 increases the force you exert on the rope to cause the speed to increase by a factor of 1.70.

What is force?

Force is a push or pull upon an object resulting from the object's interaction with another object. Every force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.

The relationship between the force applied to a rope, its mass, and the resulting acceleration is described by Newton's second law of motion.

F = m * a.

If we have an initial force F1 that causes an object of mass m to have an initial acceleration a1, and we increase the force to F2, the new acceleration will be a2. We can use this equation to find the factor by which we need to increase the force in order to cause the speed to increase by a factor of 1.70.

F2 = m * a2

F2 = m * a1 * √(1.70)

F2 = F1 * √(1.70)

So, to increase the speed by a factor of 1.70, you must increase the force you exert on the rope by the square root of 1.70, or about 1.30.

Therefore, 1.30 increases the force you exert on the rope.

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The point on the x-axis where the electric field is zero is 1.6667 * C / r1² = C / r2².

We would need additional information such as the distances of the charges from the point on the x-axis.  We cannot determine the exact point on the x-axis where the electric field is zero.

To find the point on the x-axis where the electric field is equal to zero, we need to consider the electric fields created by each charge individually and then determine the point where the net electric field cancels out.

Let's calculate the electric field created by each charge separately using Coulomb's law:

For the charge at the origin:

E1 = k * |q1| / r1²

For the charge on the x-axis at x = 1.00 m:

E2 = k * |q2| / r2²

where:

E1 and E2 are the electric fields created by the charges q1 and q2, respectively

k is the electrostatic constant (k ≈ 9 × 10⁹ N m²/C²)

|q1| and |q2| are the magnitudes of the charges

r1 and r2 are the distances from the charges to the point on the x-axis where we want to find the electric field

To cancel out the net electric field, the magnitudes of E1 and E2 must be equal. Therefore, we can set up the equation:

E1 = E2

k * |q1| / r1² = k * |q2| / r2²

Substituting the given values:

15x10⁻⁶ C / r1² = 9x10⁻⁶ C / r2²

1.6667 * C / r1² = C / r2²

To find the point on the x-axis where the electric field is zero, we need to find the values of r1 and r2 that satisfy this equation.

However, we don't have enough information to determine the specific values of r1 and r2 from the given information. We would need additional information such as the distances of the charges from the point on the x-axis.

Therefore, without further information, we cannot determine the exact point on the x-axis where the electric field is zero.

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Answer:1

Explanation:t=rad2h/g

The launch of projectiles allows to find the height of the body launched horizontally is:

Projectile launching is an application of kinematics where there is no acceleration on the x-axis and the y-axis is the gravity acceleration.

In the attachment we see a diagram of the movement, as the body is thrown horizontally, its initial vertical speed is zero.

           y = y₀ + \(v_o_y\) t - ½ g t²

Where y, y₀i are the current and initial heights, respectively, \(v_{oy}\) the vertical initial velocity, g the acceleration of gravity and t the time.

           0 =y₀ + 0 - ½ g t²

           y₀ = ½ g t²

let's calculate

           y₀ = ½ 9.8 4.5²

           y₀ = 99.2 m

          y₀ = h = 99.2 m

This is the initial height of the object when it is thrown.

In conclusion using the projectile launch we can find the height of the horizontally launched body is:

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Answer:

V = IR

V = voltage = 9 volts

I = current

R = resistance = 18 ohms

V = IR

9 = I·18

The energy required to heat up 100.0 grams of water from 0.000C to 60.00C is 25,080 Joules.

To calculate the amount of energy required to heat up 100.0 grams of water from 0.000C to 60.00C, the following equation must be used:  Energy (Joules) = mass (grams) x specific heat capacity (J/g°C) x temperature change (°C)

In this case, the energy required is Energy ((Joules) = 100.0 (grams) x 4.18 (J/g°C) x 60.00 (°C) = 25,080 Joules  The specific heat capacity of water is 4.18 J/g°C, which is a measure of how much energy is required to raise the temperature of 1 gram of water by 1°C. In this equation, 100.0 grams of water is being heated from 0.000C to 60.00C, which is a temperature change of 60.00 degrees Celsius.

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The sound pressure ratio ranges from 10,000 to 1,00,000. The decibel level ranges from 80 dB to 100 dB.

The meaning of sound pressure is the discrepancy between the actual pressure and average pressure at any given instant at any place in the field of a sound wave.

The intensity of a sound, expressed in decibels, is known as sound pressure level (SPL) (dB).

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This question deals with the volume of different shapes, such as sphere and cylinder.

a) volume of the sphere is "33.51 m³".

b) volume of the cylinder is "25.13 m³".

a)

The volume of a sphere is given by the following formula:

\(Volume = \frac{4}{3}\pi r^3\\\\Volume = \frac{4}{3}\pi (2\ m)^3\)

Volume = 33.51 m³

b)

The volume of a cylinder is given by the following formula:

\(Volume = \pi r^2l\\\\Volume =\pi (2\ m)^2(2\ m)\)

Volume = 25.13 m³

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The attached picture shows the formulae of the volume of different shapes.

Answer: A wavelength is how long ONE wave is. First divide the distance of the whole diagram by the number of waves. you will get 2m. This is the answer.

Given

The electric flux is

Radius of the sphere,

To find

a. The flux through a gaussian sphere with radius of 29.0 cm.

b. The magnitude of the charge

Explanation

a. Since the gaussian sphere covers the same charge so the electric flux through both the sphere will be same.

Thus the required flux is

b.

The magnitude of the charge is

Conclusion

a. The flux is

b. The charge is

Answer

As the angle of incidence increases in Figure 2.8, a point is finally reached where the refracted ray does not emerge at the second layer but lie along the interface. This particular angle of incidence at which the angle of refraction is 90° and the refracted ray lies along the interface is known as the critical angle. At and beyond the critical angle, there is no transmitted ray and therefore a very high reflected ray will be recorded .

Therefore,

sinθisin90=Vp1Vp2

But, sin 90 = 1.

At critical angle,

sinθcritical=Vp1Vp2

A critical refracted wave travels along the interface between layers and is refracted back into the upper layer at the critical angle. The waves refracted back into the upper layer are called head waves or first-break refractions because at certain distances from a source, they are the first arriving energy. Recorded first-break refraction is shown in Figure 2.10.

Note that these first-break refractions can give us important information about the shallow velocities on land seismic data.

Note also that seismic data are acquired in such a way that reflections from horizons of interest are in the pre-critical region, even at the farthest offset in the data.

In reality, part of the seismic energy arriving at an interface is transmitted and refracted, and another part of the energy is reflected at that same interface. Given that there are many reflectors in the subsurface, there will be many paths from source to receiver, each of them with a different travel time. The proportion of energy reflected depends on the material properties of the two bounding layers and on the angle of incidence

The dimension that is not one of the three basic dimensions in semantic differential scales is a. Beneficence.

Semantic differential scales are used to measure the meaning of concepts or objects based on the evaluation of their attributes along several dimensions. These dimensions are typically bipolar and represent opposite extremes of a characteristic. The three commonly recognized basic dimensions in semantic differential scales are evaluation, potency, and activity.

Evaluation refers to the assessment of the concept or object in terms of its positive or negative value. It captures the degree of favorability or unfavorability associated with the concept.

Potency represents the perceived strength or power associated with the concept. It measures the extent to which the concept is seen as influential, dominant, or forceful.

Activity reflects the level of activity or passivity associated with the concept. It assesses the degree to which the concept is seen as active, dynamic, or energetic versus inactive or passive.

Beneficence, on the other hand, is not one of the three basic dimensions in semantic differential scales. Beneficence refers to the concept of doing good or providing benefits, often in the context of ethical considerations or moral obligations. While beneficence is an important concept, it is not one of the dimensions typically measured in semantic differential scales.

Therefore the correct answer is a. Beneficence.

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Answer:

b. 220 V

Explanation:

Let resistors be R1, R2, and R3 respectively.

Given the following data;

R1 = 20 ohms

R2 = 30 ohms

R3 = 60 ohms

Current = 2 Amperes

To find the voltage;

First of all, we would determine the total effective resistance (RT).

For series circuit;

RT = R1 + R2 + R3

RT = 20 + 30 + 60

RT = 110 Ohms

Next, we find the voltage using the formula;

Voltage = current * resistance

Voltage = 2 * 110

Voltage = 220 Volts

The amount of work done by a heat engine can be calculated using the first law of thermodynamics. According to this law, the work done by the system is equal to the difference between the heat input and the heat output.

In a heat engine, heat is supplied to the system from a high-temperature reservoir and some of this heat is converted into work. The remaining heat is released to a low-temperature reservoir, typically the environment.

To determine the amount of work done, subtract the heat released to the environment from the heat input to the system. This can be expressed as:

Work = Heat input - Heat released

It's important to note that the efficiency of a heat engine is determined by the ratio of the work output to the heat input. The efficiency is given by the equation:

Efficiency = (Work output / Heat input) * 100%

In summary, the work done by a heat engine is calculated by subtracting the heat released to the environment from the heat input to the system. The efficiency of a heat engine is determined by the ratio of work output to heat input.

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The speed of the laser beam relative to Tom is 2.95c.

The teenager Sam and Tom are approaching each other with a speed of 0.95c while playing chicken in their rocket.

Sa fires a laser from his rocket towards Tom.

The speed of the laser will be equal to c because it will have the speed of light.

Now, the speed of the the rocket of Sam from the rocket of Tom will be,

V = 0.95c-(-0.95c)

V = 1.95c.

Now, because the laser is fired towards Tom, speed of the laser with respect to Tom will be,

V' = 1.95c - (-c)

V' = 2.95c.

So, the speed of the laser beam relative to Tom is 2.95c.

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The number of floors that the ball should fall in 3s from the 12th floor is the 9th floor.

We know that

\(S = ut + \frac{1}{2at^2}\)

where,

u denotes the initial velocity = 0 m/s.

t denotes the time = 1s

S denotes the displacement.

a denotes the acceleration = 9.8m/s^2

Now S should be

\(= 0\times 1 + \frac{1}{2} \times 9.8 \times 1 \times 1\\\\= \frac{9.8}{2}\\\\\)

= 4.9m

So, the 1 floor should be 4.9m tall.

Now After 3 seconds

\(S = ut + \frac{1}{2at^2}\)

\(= 0\times 3 + \frac{1}{2} \times 9.8 \times 3^2\\\\= \frac{9\times 9.8}{2}\\\\\)

= 44.1m

Now the number of floors should be

= 44.1 ÷ 4.9

= 9

Therefore we can conclude that the number of floors that the ball should fall in 3s from the 12th floor is the 9th floor.

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Answer:  1.) The intensity of the sound wave which reaches the listener’s ear.

2.) The square of the amplitude of the sound wave.

3.) The mass of air which can be set into vibration.

Explanation:

Answer:

Explanation:The refractive index of a medium is the ratio of the speed of light in vacuum or air to the speed of light in that medium. In this case, we can calculate the refractive index of water as follows:

Refractive index of water = Speed of light in air / Speed of light in water

Refractive index of water = 3 x 10^8 m/s / 2.26 x 10^8 m/s

Refractive index of water = 1.33 (rounded to two decimal places)

Therefore, the refractive index of water is approximately 1.33.

Color, hardness, malleability, soluble, electrical conductivity, weight, melting point, & boiling temperature are examples of the physical qualities of matter.

By definitions, the reciprocal is electrical resistivity, or S/m (siemens per meter) as SI units, is the measurement unit for electrical conductivity. The conversion chart between SI units with regular units is displayed in Table 1. The quantity of the SI unit was divided by 100 to determine the worth of the traditional unit.

For conducting electricity, metallic materials such as copper, iron, silver, aluminum, and silver work best. Via the electrodes in some kind of a standardised aqueous solution at a specific temperature, the electrical conductivity of a substance is measured.

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Answer:

False

Explanation:

velocity is more important than speed

Velocity is defined as the speed with direction.

This statement is true.

Velocity is different from speed look below at the differences.

Speed is defined as the ratio between distance over time while velocity is given as the ratio of displacement i.e. speed with direction over time.

Example: Velocity is the rate of motion, speed, or action. An example of velocity is a car driving at 75 miles per hour in the north direction.

Thus, the given statement is true.

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Answer:

Example

Write 81 900 000 000 000 in standard form: 81 900 000 000 000 = 8.19 × 1013

It’s 1013 because the decimal point has been moved 13 places to the left to get the number to be 8.19

Explanation:

Remember

  V = IR       which is    V/I = R      120 v / .5 A = 240 Ω

Answer:

Thermal energy is an example of kinetic energy, as it is due to the motion of particles, with motion being the key. Thermal energy results in an object or a system having a temperature that can be measured. Thermal energy can be transferred from one object or system to another in the form of heat.

Explanation:

Answer:

Thermal energy is an example of kinetic energy, as it is due to the motion of particles, with motion being the key. Thermal energy results in an object or a system having a temperature that can be measured. Thermal energy can be transferred from one object or system to another in the form of heat.

Explanation:

1. Frequency

2. Reflected

3. Absorbed

4. Black

Answer:

By using the acceleration formula,

\(a = \frac{v - u}{t} \)

\(a = \frac{14.7 - 0}{3.5} \)

\(a = 4.2m \: s ^{ - 2} \)

Answer:

0.466 (3 sig. fig.)

Explanation:

Frictional force acting on the box = 5.00×10^2xsin25

Normal force acting on the box = 5.00×10^2xcos25

coefficient of friction = 0.466 (3 sig. fig.)

Given:

The initial value of the current through the circuit is I.

To find:

The current through the circuit after the circuit is changed.

Explanation:

Let us assume that the total voltage supplied by the two batteries to the circuit is V.

And let us assume that the resistance of the bulb is R.

From Ohm's law, the voltage across the circuit is given by,

Thus the current will be,

When the two identical bulbs are connected, the total resistance of the circuit will be R+R=2R.

Thus from Ohm's law, the current through the resistance is given by,

On substituting the equation (i) in the above equation,

Final answer:

The current in the circuit after the circuit is changed is (1/2) I.

The rate of change of the distance between the two particles is 10 units per second.

Let's call the distance between particle A and particle B "d". To find the rate of change of "d", we need to take the derivative of "d" with respect to time. By using the Pythagorean theorem to relate the distance between the two particles to their x and y coordinates:

d^2 = x^2 + y^2

Taking the derivative of both sides with respect to time, we get:

2dd/dt = 2x(dx/dt) + 2y(dy/dt)

where dx/dt is the rate of change of particle A's x-coordinate (which is equal to 2), and dy/dt is the rate of change of particle B's y-coordinate (which is equal to 3).

We need to find x and y in terms of time. Particle A is moving at a constant rate of 2 per second along the positive x-axis, so its x-coordinate is given by:

x = 2t

where t is time in seconds.

Similarly, particle B is moving at a constant rate of 3 per second along the positive y-axis, so its y-coordinate is given by:

y = 3t

Substituting these expressions for x and y into our equation for the rate of change of "d", we get:

2dd/dt = 2(2)(1) + 2(3)(1) = 10

So the rate of change of the distance between the two particles is 10 units per second.

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Answer:

imma try nd help cuz i havent seen anybody answer so

1.sara

2.same for both

3.tom

Explanation:

Answer:

I am not sure if this is the answer

acceleration: 2.2m/s

Explanation:

here

initial velocity(u): 11m/s

Final velocity(v): 33m/s

time taken(t): 10 s

now

a:v-u/t

or

acceleration:final velocity-initial velocity/time taken

or

a: 33-11/10

or

a:22/10, divide it

: a=2.2m/s#