While timing a pendulum, Mr. Cantor notices that it takes 9.34 s for a
pendulum to complete 6 complete swings. What is the period of this
pendulum?
9.34s
1.56 s
6s
0.64s

Answer:

See image below

Explanation:

See image

Answer:

Explanation:

λ = hc/¢

Where

h = the Plank constant 6.63 x 10-34 Is

C = 3.0×10^8

¢= 1.96eV

= (6.63×10^-34Js)×(3×10^8)÷( 1.96eV) × 1eV/1.6×10^-19J

= (1.989×10^-25)÷( 1.96eV)×1eV/1.6×10^-19J

= 6.342×10^-7m

B) maximum kinetic energy

= K=hf−ϕ ........1

ϕ = hc

Where

​ h = constant 6.63 x 10^-34Js

ϕ= 1.96eV

Recall

λ =425×10^-9m

f = frequency in Hz

f = c / λ

C = 3.0×10^8

f = 3.0×10^8 / 425×10^-9m

f = 0.000705Hz

From equation 1

K = (6.63 x 10^-34Js×0.000705Hz )- 6.63 x 10^-34Js×3.0×10^8

= 4.68×10^-37 - 1.989×10^-25

= - 1.98×10^-25J

The new electrostatic force will be 384 units.  

The electrostatic force of attraction between two charges \(q_{1} \\\)(charge of object 1)  and \(q_{2}\)(charge of object 2) separated by a distance d is given by

\(F = \frac{q_{1} q_{2}}{4\pi E_{0} d^{2} } \\\)

\(E_{0} = 8.854 * 10^{-12} C^{2} N^{-1} m^{-1}\) is the permittivity of free space.

Initially, we have,

\(\frac{q_{1} q_{2}}{4\pi E_{0} d^{2} } =F_{1} = 8 units\)  

Now, if the charge of object 1 is multiplied by 1, the charge of object 2 is multiplied by 3, and the distance separating objects 1 and 2 is divided by 4, we have, \(q_{1} =q_{1}, q_{2} =3q_{2} , d=\frac{d}{4}\).

The new electrostatic force will be,

\(F_{2} = \frac{q_{1} 3q_{2}}{4\pi E_{0} (\frac{d}{4} )^{2} } \\\\\) units.

We have, \(F_{1} = 8 units= \frac{q_{1} q_{2}}{4\pi E_{0} d^{2} } \\\)

Hence,

\(F_{2} =\frac{8*3}{(\frac{1}{4}) ^{2} } units= 384 units.\)

Hence, the new electrostatic force will be 384 units.

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Answer:

B

Explanation:

Answer:

energy and matter

Explanation:

physics is the study of matter and it interaction with energy

The amount manager should invest today in GIC to have C$5 million in 10 years is C$2,775,633.

To find the amount the manager should invest today in a GIC, we can use the future value formula:

FV = PV(1 + r/n)^(nt)

Where FV is the future value, PV is the present value, r is the annual interest rate, n is the number of times interest is compounded per year, and t is the number of years.

In this case, FV = C$5 million, r = 6% (0.06), n = 12 (compounded monthly), and t = 10 years. We need to solve for PV.

Rearrange the formula to solve for PV:

PV = FV / (1 + r/n)^(nt)

Now, plug in the given values:

PV = 5,000,000 / (1 + 0.06/12)^(12*10)

PV ≈ C$2,775,633

The manager should invest approximately C$2,775,633 in the GIC today to have C$5 million in 10 years.

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Fraction of the juice in the large container is made up of concentrate is 11/10.

Let the two identical pitchers be A.

Let concentration of orange juice and water be x and y respectively.

Then according to question,

A=1/3x + 2/3y (1st pitcher)

A=2/5x + 3/5y (2nd pitcher)

From these two equations we get x=y.

i.e. A=1/3x+2/3x

 ⇒A=x=y

So total concentration of orange juice is: 1/3x + 2/5x=11/5x=11/5A

Now total concentration of pitchers=A+A=2A

i.e. Required ratio = (11/5A)/2A = 11/10

Therefore Fraction of the juice in the large container is made up of concentrate is 11/10.

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Answer:

The reading of the Geiger counter, 22 minutes later = 29 counts per minute (cpm)

Explanation:

Half life is defined as the time taken for the amount ( or activity) of a substance to reduce to half its original value.

As stated in the question, the half life of Francium-233 is 22 minutes, \(t_{1/2} = 22 minutes\). This means that it takes 22 minutes for the activity of Francium-233 to reduce to half of its original value.

The original activity of Francium-233 =  58 counts per minute (cpm)

By the end of 22 minutes, the activity measured by the counter would have halved.

Activity of Francium-233 after 22 minutes = 58/2

Activity of Francium-233 after 22 minutes = 29 counts per minute (cpm)

Answer:

It helps melt the ice away on their walkway.

Explanation:

The salt makes the ice to freeze at a lower temperature. So when a solute (salt) comes into contact with the ice the freezing point is lowered.

Answer:

ΔV = 9

Explanation:

Given your speed data, we can simply think about it graphically and calculate the slope. When your data is layed out on a graph there is a linear relationship, so it has a constant slope. We can calculate slope easily with your data using y2-y1/x2-x1 so 18-9/2-1. This gets us a constant change in velocity (slope) of 9.

Answer:

44

Explanation:

Work = Force X Distance

Plant cell: Plant cells are typically rectangular or square in shape, with a thick cell wall surrounding the cell membrane. They have a large central vacuole that stores water and nutrients. They also have chloroplasts, which are used for photosynthesis.

Animal cell: Animal cells are typically round or irregular in shape, with a thinner cell membrane surrounding the cell.

Bacteria cell: Bacteria cells are typically small and vary in shape. They can be rod-shaped (bacillus), spherical (coccus), or spiral (spirillum) in shape. They are typically smaller than plant and animal cells and can be found everywhere.

A cell is the basic unit of life in all organisms. It is the smallest unit of an organism that can carry out all the functions of life. All living things are made up of one or more cells. Cells come in many different shapes and sizes, and they have a variety of functions.

Plant cells also have a cell wall, which provides support and protection for the cell. They also have chloroplasts, which are responsible for photosynthesis, the process of converting light energy into chemical energy. Animal cells do not have a cell wall and do not have chloroplasts.

In all, Each type of cell has unique characteristics that allow it to perform its specific functions.

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Answer:

The answer is False

Hope this helps you

It is false that a neutral atom has the same number of protons as it does neutrons. The correct option is B.

The claim that "A neutral atom has the same number of protons as it does neutrons" is untrue. Protons and electrons in a neutral atom are equal in number, but neutron counts can change.

Electrons have a negative charge, whereas protons have a positive charge. A neutral atom has a net charge of zero because the protons' positive charge is balanced by the electrons' negative charge.

Neutrons don't have an electric charge, though. Within a single element, the amount of neutrons can change, giving rise to many isotopes.

Isotopes contain the same amount of protons, but their atomic masses vary depending on how many neutrons they have.

Thus, the correct option is B. False.

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Answer:

i disagree because if you throw a ball in the air gravity will bring it down so only the force that moved it was needed.

Explanation:

Because of Kinetic Theory Postulate, the gas molecule's collision will affect.

Gases can be compressed because most of the volume of gas is an empty space according to Kinetic Molecular theory. If we compress a gas without changing its temperature, the average K.E of the gas particles remains the same. There is no change in the speed of the gas molecules with which the particles move in a container, but the container is smaller. So particles travel from one side of the container to the other in a very small period of time. So it means that they strike the walls mostly. Any increase in the frequency of collisions with the walls must increase the pressure of the gas. from Boyle's law, the pressure of gas becomes more significant as the volume of the gas becomes smaller have opposite relation.

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a) The isocost curve equation is G = (20000 - 100C)/500. b) The isocost curve equation is G = (30000 - 100c)/500. c) The isocost curve equation is G = (20000 - 100C)/375. d)  The isocost curve equation is G = (20000 - 120C)/500.

To draw the isocost curve showing the different combinations of gas and coal, we need to use the cost per unit values for coal and gas, as well as the given expenditure (TC) and the changes in expenditure or prices.

Let's denote the quantity of coal as C and the quantity of gas as G. The cost per unit of coal is 100, and the cost per unit of gas is 500.

(a) Initial expenditure (TC) of 20000:

To find the combinations of gas and coal that can be purchased with an initial expenditure of 20000, we can use the following isocost equation

TC = 100C + 500G

We can rearrange the equation to solve for G in terms of C

G = (TC - 100C) / 500

Now we can plot the isocost curve with TC = 20000 using the equation above.

(b) Expenditure (TC) increases by 50%

If the expenditure increases by 50%, the new expenditure (TC_new) becomes 1.5 × TC = 1.5 × 20000 = 30000.

We can use the same isocost equation as before, but with the new expenditure value:

TC_new = 100C + 500G

Rearranging the equation to solve for G

G = (TC_new - 100C) / 500

Now we can plot the isocost curve with TC_new = 30000.

(c) Gas price reduced by 25%:

If the gas price is reduced by 25%, the new cost per unit of gas (Gas_new) becomes 0.75 × 500 = 375.

We can use the original isocost equation, but with the new cost per unit value:

TC = 100C + 375G

Rearranging the equation to solve for G

G = (TC - 100C) / 375

Now we can plot the isocost curve with the reduced gas price.

(d) Coal price rises by 20%

If the coal price rises by 20%, the new cost per unit of coal (Coal_new) becomes 1.2 × 100 = 120.

We can use the original isocost equation, but with the new cost per unit value:

TC = 120C + 500G

Rearranging the equation to solve for G:

G = (TC - 120C) / 500

Now we can plot the isocost curve with the increased coal price.

By plotting these isocost curves on a graph with G on the y-axis and C on the x-axis, we can visualize the different combinations of gas and coal that can be purchased at the given expenditures or price changes.

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A third power of 50 is 125,000.

Why it works: 53 = 5 x 5 x 5 = 125. 53 is also equivalent to 5 cubed. The answer obtained when a number (x) is multiplied by itself three times is known as the cube of that number. How many times the base would need to be multiplied by itself to get the right value is indicated by a number's "power."

Yes, 5+5 equals 10.

50 to the third power means multiplying 50 by itself three times, which can be written as:

50 x 50 x 50 = 125,000

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The period of oscillation of the physical pendulum is 2.40 s.

Where T is the period of oscillation, I is the moment of inertia, m is the mass of the pendulum, g is the acceleration due to gravity, and d is the distance between the center of mass of the pendulum and the pivot point. In this case, since the meter stick is pivoted at a small hole drilled through the stick a distance 1.5 cm from the end (top), the distance between the center of mass of the pendulum and the pivot point (d) is equal to the length of the meter stick minus 1.5 cm (i.e., l - 1.5 cm).

The moment of inertia of a meter stick pivoted at one end is given by:

\(I = \frac {1} {3} ml^2\)

where m is the mass of the pendulum and l is the length of the meter stick.

Thus, in this case, the moment of inertia is given by:

\(I = \frac {1}{3} \c dot 0.5 \text {kg} \ c dot (1 \text {m} - 0.015 \text {m}) ^2 = 0.039 \text {kg} \c dot \text{m}^2\)

The acceleration due to gravity is approximately 9.8 m/s^2.

Thus, the period of oscillation is:

\(T = 2\pi \sqrt{\frac {0.039 \text{ kg}\c dot \text{m}^2} {0.5 \text{ kg} \c dot 9.8 \text{ m/s}^2 \c dot (1 \text{ m} - 0.015 \text{ m})}} \ approx 2.40 \text{ s}\)

Therefore, the main answer is: The period of oscillation of the physical pendulum is 2.40 s.

: F or a physical pendulum, the period of oscillation can be calculated using the above formula. In this case, a meter stick is being used as the pendulum. The meter stick is pivoted at a small hole drilled through the stick a distance 1.5 cm from the end (top). In order to find the period of oscillation, it is necessary to first determine the moment of inertia, the distance between the center of mass of the pendulum and the pivot point, the mass of the pendulum, and the acceleration due to gravity. The moment of inertia is given by the equation:

\(I = \frac {1}{3} ml^2\)

where m is the mass of the pendulum and l is the length of the meter stick. Since the mass of the meter stick is 0.5 kg and its length is 1 meter, the moment of inertia is calculated as:

\(I = \frac{1}{3} \c dot 0.5 \text{ kg} \c dot (1 \text{ m} - 0.015 \text{ m})^2 = 0.039 \text{ kg}\c  dot \text{m}^2\)

The distance between the center of mass of the pendulum and the pivot point (d) is equal to the length of the meter stick minus 1.5 cm (i.e., l - 1.5 cm). This distance is equal to 0.985 meters. The mass of the pendulum is 0.5 kg. The acceleration due to gravity is approximately 9.8 m/s^2.Using these values, we can calculate the period of oscillation of the physical pendulum using the formula:

Substituting the values for I, m, g, and d into the formula, we get: \(T = 2\pi \sqrt {\frac{0.039 \text { kg}\c dot \text {m}^2} {0.5 \text{ kg} \c dot 9.8 \text{ m/s}^2 \c dot (1 \text{ m} - 0.015 \text{ m})}} \approx 2.40 \text{ s}\)

The period of oscillation of the physical pendulum is 2.40 s.

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The efficiency of the heating system is 80%.

Efficiency is the regularly measurable capacity to keep away from losing substances, energy, effort, cash, and time in doing something or in producing the desired end result. In a greater popular experience, it is the capability to do things nicely, efficaciously, and without waste.

Heat pumps are the most efficient way to heat pretty much any enclosed area, they are quiet and comfy, they decrease your heating invoice considerably, and they double as an air-conditioning gadget in the summer. Fuel heating systems can be fueled with the aid of both herbal fuel and propane with easy adjustments accounting for the one-of-a-kind traits of every. We seek advice from each fuel as genuinely "gasoline." The maximum commonplace styles of structures encompass compelled air, warm water, steam, and localized space heating.

efficiency = output/input × 100

                = 320 / 400 × 100

                 = 80 %

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a) The velocity at the peak is zero m/s

b) The direction of the acceleration of the motion is negative.

We should know that the acceleration would have to do with the change in the speed of a body and in the case of the question that we have here we are told that the object has been thrown straight up.

At the maximum height, the object would cease to move and as such the velocity of the object at at the peak of the motion would be seen to be zero. The acceleration in this case would be negative.

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Answer:

Density → Mass and Length.

Acceleration → Length and Time.

Force → Mass, Length and Time.

Pressure → Mass, Length and Time.

Work → Mass, Length and Time.

Answer:

2nd one :)

Explanation:

Answer:  the second one

Explanation:

Answer:

as fuel is combusted,the rocket pushes the gas is backward and the gas is pushed the rocket forward

Explanation:

hope this helps :]

Answer:

The number of freely moving neutrons decreases over time.

Explanation:

During a fission reaction, the total number of protons remains the same. In other words, the charge is conserved. It is the neutron number that decreases during a fission reaction.

Therefore, 'The number of freely moving neutrons decreases over time' is the correct answer.

A wire of given material having length l and area of cross section A has resistance of 4 Ohm. The resistance of the second wire is 2 Ohm.

The resistance of a wire is given by the formula:

R = (ρ * l) / A

where R is the resistance, ρ is the resistivity of the material, l is the length of the wire, and A is the cross-sectional area of the wire.

Let's assume the resistivity of the material is the same for both wires.

For the first wire:

Resistance (R1) = 4 Ohm

Length (l1) = l

Cross-sectional area (A1) = A

Using the resistance formula, we can rearrange it to solve for the resistivity (ρ):

ρ = (R * A) / l

Now let's calculate the resistivity for the first wire:

ρ1 = (4 Ohm * A) / l

For the second wire:

Length (l2) = l/2

Cross-sectional area (A2) = 2A

Using the resistivity formula, we can calculate the resistance (R2) for the second wire:

R2 = (ρ * l2) / A2

Substituting the value of ρ1 for ρ and the given values:

R2 = [(4 Ohm * A) / l] * (l/2) / (2A)

Simplifying the expression:

R2 = 2 Ohm

Therefore, the resistance of the second wire, with length l/2 and cross-sectional area 2A, is 2 Ohm.

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The total angle, in radians, through which a point on the flywheel rotates is 7540 radians

From the question, we are to determine the total angle in radians

Using the formula,

\(\omega = \frac{\theta}{t}\)

Where \(\omega\) is the angular velocity

\(\theta\) is the angle

and t is the time

From the given information,

\(\omega = 30 \ rev/s\)

Convert to rad/s

\(\omega = 30 \times 2\pi \ rad/s\)

\(\omega = 188.496 \ rad/s\)

and t = 40 s

From the formula

\(\omega = \frac{\theta}{t}\)

\(\theta = \omega t\)

∴ \(\theta = 188.496 \times 40\)

θ = 7539.822 rad

θ ≅ 7540 rad

Hence, the total angle, in radians, through which a point on the flywheel rotates is 7540 radians

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Answer:

1. One of the interactions that exist in the environment is symbiosis. Symbiosis is a type of interaction between two or more organisms where one organism benefits and the other organism is neither helped nor harmed.

2. Symbiosis can have a positive effect on the environment. For example, mutualistic symbiosis, where both organisms benefit, can increase the survival and reproduction of both species. This can increase biodiversity and stability in the ecosystem.

3. An example of mutualistic symbiosis is the relationship between bees and flowers. Bees collect nectar from flowers and in the process, they transfer pollen, which allows the flowers to reproduce. The bees benefit by getting food and the flowers benefit by getting pollinated. This relationship is essential for the survival of both bees and flowers and contributes to the biodiversity of the ecosystem.

Answer:

The temperature  change in the calorimeter will be lower

Explanation:

Water is an example of a molecular substance. They have relatively low melting points and boiling points usually below 300° C . Water reacts with metals to a degree varying with their position in the electrochemical series.

The specific heat of water is 4179.6 Joules which is relatively high . This typically implies that water absorbs a larger amount of heat but the increase in temperature of its boiling points is relatively low. Thus; in the 200-mm test tube that contains water and was subsequently added to the calorimeter , the heat present was initially absorbed by the water and that does not result to an increase in the temperature change in the calorimeter. Thus the temperature change in the calorimeter will be lower.