A 30 cm scale has one end broken. The mark at the broken end is 2.6 cm. How would you use it to measure the length of your pencil

To change the capacitive time constant of the combination to three times its original value, a capacitance of 3.47 microfarads must be placed in parallel with the original capacitance.

The time constant of an RC circuit (resistor-capacitor circuit) is given by the product of resistance and capacitance, i.e., RC. In this case, we have an RC circuit with a resistor of 640 Ω and an unknown capacitance C. Let the original time constant be τ. Then,

τ = RC = 640C

To change the time constant to three times its original value, we need:

3τ = 3RC = 640(3C)

Solving for C, we get:

C = 3.47 microfarads

Therefore, a capacitance of 3.47 microfarads must be placed in parallel with the original capacitance to change the capacitive time constant of the combination to three times its original value.

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We use fixed density because the density of materials or substances can change with temperature due to thermal expansion or contraction.

The density of an object is defined as the ratio  of mass to unit volume of an object.

Mathematically, the density of an object is given as;

density = mass/volume

The density of materials or substances can change with temperature due to thermal expansion or contraction.

When the temperature of a substance increases the atom of the substances vibrates more leading increase in the volume of the substance and hence smaller density.

On the other when the temperature of the substance decreases, the atom vibrate less leading to decrease in the volume of the substance and hence a greater density.

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Answer:

Explanation:

Heat gained by ice in warming up to 0⁰C = .035 x 2090 x (83-0)= 6071.45 J

heat used up by ice to melt at 0⁰C = .035 x 3.33 x 10⁵ J = 11655 J

Heat used up in warming up water to t⁰C = .035 x 4186 x t = 146.51 t

heat released by warm water to cool from 22⁰C to t = .565 x 4186 x ( 22 - t )

=52032 -2365.1 t

heat released by copper calorimeter  to cool from 22⁰C to t =  .087 x 387 x ( 22 - t ) = 740.72 - 33.7 t

total heat released = 52032 -2365.1 t  + 740.72 - 33.7 t

= 52772.72 - 2398.8 t

Heat lost = heat gained

52772.72 J- 2398.8 t  = 6071.45 J + 11655 J + 146.51 t

2545.31 t = 35046.27

t = 13.8°C.

Answer: a

Explanation:

Answer:

C

Explanation:

"speaking on it's own " Those key word told me sound ,text and animation would not be correct

The magnitude of the new force (F') when we increase the distance between the charges by a factor of two and double one of the charges is half the initial force (F).

To determine the magnitude of the force between two charges when the distance between them is increased by a factor of two and one of the charges is doubled, we need to consider Coulomb's law.

Coulomb's law states that the force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them. Mathematically, it can be expressed as:

\(F = k * (q1 * q2) / r^2\)

where F is the force between the charges, q1 and q2 are the magnitudes of the charges, r is the distance between the charges, and k is the electrostatic constant.

Let's assume that the initial force between the charges is represented by F.

When we double one of the charges, let's say q2, the new charge becomes 2q2. Furthermore, when we increase the distance between the charges by a factor of two, the new distance becomes 2r.

Substituting these new values into Coulomb's law, we get:

New force (F') =

\(k * (q1 * 2q2) / (2r)^2\)

\(= k * (2 * q1 * q2) / (4 * r^2)\)

\(= (1/2) * (k * (q1 * q2) / r^2)\)

\(= (1/2) * F\)

Therefore, the magnitude of the new force (F') when we increase the distance between the charges by a factor of two and double one of the charges is half the initial force (F).

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Complete Question

Complete Question is attached below

Answer:

a)Option B

b)Option B

Explanation:

a)

Without any confirmation it will be utterly wrong to conclude that high power voltage is the reason for the elevated cancer cases

Therefore

Option B

b)

The High Concentration of cells volume in a part of the Body is what causes Cancer

Therefore

Option B

Answer:

A. A motor

Explanation:

The hand that holds the broomstick's top when you sweep is its fulcrum. The hand in the top of the broom serves as the pivot point, making it a lever.

The majority of brooms have the fulcrum inserted into the bristles at the base of the brush. The user can apply a reasonable amount of force without the broom tipping over or becoming unstable because this location has a good balance of leverage and stability.

A lever is a straightforward device with a rigid bar or board that rotates around the fulcrum, a fixed point.

Lever, Pulley, Wheel and Axle, Inclined Plane, Wedge, and Screw are the six classical simple machines.

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Answer:

Friction

Explanation: is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static friction acts on objects when they are resting on a surface.Nov 3, 2021

Answer:

Work done  on the two cart system is 2 N-m

Explanation:

Work done is equal to the product of force and displacement

Work done =4N * (0.17 +0.33)

work done = 4N * 0.5

Work done = 2 N -m

Work done  on the two cart system is 2 N-m

The x- and y-components of vector d (magnitude 100 m and at 45 degrees south of east) is x- component \(50 \sqrt{2}$\) and y- component is \(50 \sqrt{2}$\).

A. x component\($=100 \sin 45^{\circ}\)

\(100 \sin \left(45^{\circ}\right)$$\)

Use the following trivial identity: \($\quad \sin \left(45^{\circ}\right)=\frac{\sqrt{2}}{2}$\)

\(=100 \cdot \frac{\sqrt{2}}{2}$$\)

\(100 \cdot \frac{\sqrt{2}}{2}=50 \sqrt{2}$$\)

\($$=50 \sqrt{2}$$\)

y component \($=100 \cos 45^{\circ}\)

\($$100 \cos \left(45^{\circ}\right)$$\)

Use the following trivial identity: \($\quad \cos \left(45^{\circ}\right)=\frac{\sqrt{2}}{2}$\)

\($$=100 \cdot \frac{\sqrt{2}}{2}$$\)

\($$\begin{aligned}&100 \cdot \frac{\sqrt{2}}{2}=50 \sqrt{2} \\&=50 \sqrt{2}\end{aligned}$$\)

A quantity with both magnitude and direction is called a vector. In contrast to a scalar number, a vector quantity also includes a direction component that aids in locating one location in relation to another.

A vector in mathematics is a number that not only defines magnitude but also indicates how an item moves or is positioned in relation to other points or objects. It is sometimes referred to as a spatial vector, geometric vector, or Euclidean vector.

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Answer:

OA. Burning animal wastes to run turbines and generators

Explanation:

When you burn something like wood, you are creating an oxidation reaction. Chemically speaking you are turning the object's current state into a different one through an exothermic reaction

Answer:

36

Explanation:

2=24

24÷2=1

1=12

12*3=36

Ratio is from pigs to horses so:

Let no. of pigs be x

= 2:3 :: x:24

= 2/3 = x/24

= 2 × 24 = 3x

= 48/3 = x

= 16 = x

So the no. of pigs in farm - 16.

Answer:

β 2 = 0.02575 mm

Explanation:

given data

wavelength = 563 nm

separation distance between adjacent bright fringes =  0.0290 mm

wavelength = 500 nm

solution

we get here separation distance between adjacent bright fringes that is express as

β = \(\frac{\lambda D }{d}\)    ..................................1

here D is distance from plane of slit to screen

and d is slit sepation that is constant

so

\(\frac{\beta 1}{\beta 2} = \frac{\lambda 1}{\lambda 2}\)  

β 2 = \(\frac{500}{563} \times 0.0290\)  

β 2 = 0.02575 mm

The type of figurative language the poet uses to describe the way a police officer acts as an every day hero in this stanza is metaphor. option(c)

The metaphor compares a police officer to both a wall and a net, both of which serve to protect and support those around them. By using this metaphor, the poet emphasizes the important role that police officers play in our lives and the trust that we place in them to keep us safe and provide assistance when needed. The metaphor also highlights the selflessness of police officers, who are willing to put themselves in harm's way to protect others. Like a wall or a net, they act as a barrier between danger and those they serve, absorbing the impact and preventing harm from reaching us.

Overall, the use of metaphor in this stanza helps to convey the importance and value of police officers in our communities, and their essential role in serving and protecting us. option(c)

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As stated in the preceding statement The  plane's initial velocity  and acceleration are vi = -70 km/hr and 2.78 m/s², respectively.

The rate of speed and direction changes of velocity with time. A point or object going straight ahead is accelerated when it increases or decelerates. Even if the speed remains constant, movement on a circle increases because the direction is always shifting.

V\(_a_v_g\) = vf + vi/2

-35 = 0 + vi/2

-70  = vi

-70km/hr = vi

vf =vi + at

Before continuing convert km/h to m/s so we can support the units of seconds

-70 km/h(1000m/1km)(1 h/3600s)

= -19.44 m/s

0 = vi + at

-vi = at

a = -vi/t

a = -(-19.44m/s)/7s

a =  2.78 m/s².

The  plane's initial velocity  and acceleration are vi = -70 km/hr and 2.78 m/s², respectively.

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The area of the plates of the given parallel plate capacitor is 3.531 × 10⁻⁶ m², and the new capacitance of the capacitor with mylar in between the plates is 5.466 pF

By using the formula C = ε₀A/d, where C = capacitance, ε₀ = permittivity of free space, A = area of plates, and d = distance between plates we can calculate the area of the plates of a parallel plate capacitor with capacitance of 4.425 picofarads and plate separation of 0.2 millimeters.

Substituting the given values of capacitance and plate separation, we get;

4.425 pF = (8.85 × 10⁻¹² F/m)(A)/(0.2 × 10⁻³ m)A

= 3.531 × 10⁻⁶ m²

Adding a dielectric substance, such as mylar, in between the capacitor plates increases the capacitance of the parallel plate capacitor. The capacitance of a parallel plate capacitor with a dielectric can be determined using the formula C = kε₀A/d, where k is the dielectric constant of the material.The dielectric constant of mylar is 3.1.

Substituting the values of the given capacitance, dielectric constant, and plate separation, we get;

C' = kε₀A/d

= (3.1)(8.85 × 10⁻¹² F/m)(3.531 × 10⁻⁶ m²)/(0.2 × 10⁻³ m)C'

= 5.466 pF

Therefore, the new capacitance of the parallel plate capacitor with mylar in between the plates is 5.466 pF.

The area of the plates of the given parallel plate capacitor is 3.531 × 10⁻⁶ m², and the new capacitance of the capacitor with mylar in between the plates is 5.466 pF.

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Ice at 0 degrees celsius is mixed with water at 0 degrees celsius in a perfectly insulated calorimeter.what happens depends on the relative masses of ice and water,some of the ice will melt and the final temperature will be 0 degrees Celsius.So the correct options are 1,2 and 3.

The amount of ice that melts depends on the relative masses of ice and water. If there is more ice than water, then all of the ice will melt. If there is more water than ice, then some of the ice will remain. The final temperature will be 0 degrees Celsius regardless of how much ice melts.

Option 4 is incorrect because the water is already at 0 degrees Celsius, so it cannot freeze. Option 3 is incorrect because heat is not being transferred into or out of the system, so the temperature will not change.Therefore correct option are 1, 2 and 3.

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Given,

Mass of basketball is 2 kg.

Mass of kickball is 1.32 kg

The initial velocity of the basket ball is 2.37m/s.

The final velocity of the kickball is 1.5 m/s

By conservation of momentum,

The velocity of the basketball is 1.38 m/s

Answer:

You don’t have to deal with the atmosphere of the earth. It points to the potential of the space program.

Explanation:

The electrical unit that refers to the number of electrons moving through a circuit per second is called amperes, also known as amps.                                                                                                                                                                                      

An ampere measures the rate at which electric current flows through a circuit, and is defined as the amount of charge passing through a point in one second when a steady current of one coulomb flows through the circuit. The symbol for amperes is "A".
One Ampere is equal to the flow of one Coulomb of charge per second. It is an essential parameter in understanding and analyzing electrical circuits and plays a crucial role in various electrical applications. Remember to always exercise caution when working with electrical circuits to ensure safety.

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Answer:

This happens in two ways. If an object is at rest and an unbalanced force pushes or pulls the object, it will move. Unbalanced forces can also change the speed or direction of an object that is already in motion.

Explanation:

Answer:

he said its D not A  l

                                 l

                                V

Answer:

D.its ability to lose electrons

Explanation:

Alkali metals are elements present in first group of the periodic table. Following are the metals from top to bottom.

Answer: 1280 J

Explanation: Work is calculated by multiplying the displacement (8m) by the force (160 N) which will give you 1280 J (joule)

To determine in which month it is more unusual to have a day with a high temperature of 54°F, we need to calculate the z-scores for this temperature in both January and July and compare them.

The z-score for a temperature of 54°F in January is:

z = (54 - 34) / 8 = 2.5

The z-score for a temperature of 54°F in July is:

z = (54 - 72) / 7 = -2.57

Since the absolute value of the z-score in January (2.5) is greater than the absolute value of the z-score in July (2.57), we can conclude that it is more unusual to have a day with a high temperature of 54°F in January.

This is because the z-score represents the number of standard deviations a data point is from the mean, and a z-score of 2.5 in January indicates that the temperature of 54°F is very far from the average January high temperature of 34°F. On the other hand, a z-score of -2.57 in July indicates that a temperature of 54°F is still within the range of temperatures typically seen in July, which has a much higher mean high temperature of 72°F.

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Due to the law of gravity, or gravitation, which draws all objects with mass in its vicinity toward it, Mars' gravitation is a natural occurrence.

.53 s the astronaut is in the atmosphere.

astronaut jump form .49 m.

from motion Equation : v= u + at

then we can find t = \(\frac{v-u}{a}\) = -1.88/ 3.5 = .53 sec

s = ut + ½at²

put u = 1.88 a= -3.5 and t= .53

s = .49 m

.53 s the astronaut is in the atmosphere.

astronaut jump form .49 m.

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