HEY CAN ANYONE PLS HELP ME OUT IN DIS PLS

Answer:

\(D(t) = 9(0.93)^t cos(30 \pi t)\)

Explanation:

Amplitude begins at 9 cm, \(A_0 = 9 cm\)

The amplitude decreases by 7% (0.07) each second

The amplitude function can then be modeled as:

\(A(t) = A_0(1 - 0.07)^t\\A(t) = 9(0.93)^t\)

The spring oscillates 15 times each second, the period of oscillation (time to make 1 oscillation) will therefore be calculated as:

T = 1/15

\(\frac{2\pi }{B} = \frac{1}{15} \\\\B = 30\pi\)

The graphical equation of the system described is:

\(D(t) = A cos ( Bt - C) + D\)

Horizontal shift, C = 0

Vertical shift, D = 0

\(D(t) = 9(0.93)^t cos(30 \pi t)\)

The cipher that replaces each letter of the alphabet with a different letter (not in sequence) is a substitution cipher.

In this type of cipher, each letter is replaced by another letter, symbol, or number to encrypt the message. The substitution can be done in various ways, such as shifting the alphabet by a certain number of places or using a non-sequential alphabet. Substitution ciphers can be cracked using techniques such as frequency analysis, where the frequency of occurrence of letters in the ciphertext is analyzed to reveal the original message. So, the answer to this question is: this type of cipher is called a substitution cipher.

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A light-year is a unit of distance used in astronomy, One light-year is approximately equal to 9.461 x 10^12 kilometers (5.878 x 10^12 miles).

A light-year is a unit of measurement used to express astronomical distances. It is the distance that light travels in one year in a vacuum. The speed of light is approximately 299,792,458 meters per second (or about 186,282 miles per second), so in one year (which is about 31.69 million seconds), light can travel about 9.461 trillion kilometers (about 5.878 trillion miles). So, one light-year is equal to 9.461 trillion kilometers or 5.878 trillion miles.

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The transformation of Polaroid in recent years has been characterized by a shift from analog instant photography to embracing digital technologies and modernizing its product offerings. This transformation has allowed Polaroid to adapt to the changing market and cater to the needs and preferences of today's consumers.

In recent years, Polaroid has introduced a range of digital instant cameras that combine the nostalgic appeal of instant photography with the convenience and versatility of digital imaging. These cameras typically feature built-in printers that produce instant prints, capturing the essence of Polaroid's iconic instant photography experience. Additionally, Polaroid has embraced the smartphone era by developing products like the Polaroid Lab, which allows users to turn digital photos from their smartphones into classic Polaroid-style prints.

Furthermore, Polaroid has expanded its product lineup to include various accessories, such as portable printers and film formats compatible with both analog and digital devices. By embracing digital technologies while staying true to its instant photography heritage, Polaroid has successfully repositioned itself in the market, appealing to a new generation of photography enthusiasts seeking a blend of nostalgia and modern functionality.

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Answer:

Kinetic Energy

Explanation:

Answer:

Tim has a higher potential energy than Joe.

Explanation:

The higher an object or an organism is, the more potential energy it has

Answer:

A fraction of the wave will be reflected at the junction and the remainder will be transmitted through the junction into the thin rope

Explanation:

When the junction of the thin and the thick rope is reached by the wave, the wave behaves in the following two ways;

1) A fraction of the incident wave from the thick rope to the junction/boundary of the thin rope will be reflected back to in the direction of the thick rope with a lower amplitude and upright

2) A fraction of the incident wave from the thick rope to the junction/boundary of the thin rope will be transmitted through the thin rope such that the transmitted pulse on the thin rope will have an higher amplitude than that of the thick rope due to the available energy in the wave pulse and the lesser weight of the thin rope.

Answer:

c

Explanation:

Let's conclude that the distant galaxies all appear to be moving away from us and with the more distant ones moving faster. This is the reason why we assume and infer that the universe is actually expanding.

"The universe is expanding," you may have heard because scientists revealed that faraway galaxies are leaving us at a noticeably faster rate than those closer to our home, our galaxy. So no, universe is not growing in size and it is not rotating rapidly.

Did you know that the Hubble Law states that because the universe is expanding, it may be used to calculate distances between galaxies? It never states that universe expands because the galaxy appear to be made of dark matter.

So the astounding hypothesis that the universe appears to be accelerating suggests that it is expanding faster than previously observed.

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Answer:

500

Explanation:

25/0.05

Answer:

The answer is four hundred twenty six or 426

Answer:

426

Explanation:

Answer:

A change in velocity is either a change in an object's speed or its direction. When a moving object changes direction, its velocity changes and it is accelerating.

Explanation:

Answer:

4.c

5.d

6.c

Explanation:

Answer:

true

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Answer:

True

Explanation:

A warm-up  revs up your cardiovascular system by raising your body temperature and increasing blood flow to your muscles. Warming up also helps reduce muscle soreness and it lessens your risk of injury. Cooling down after your workout allows for a gradual recovery of pre exercise heart rate and blood pressure.

Answer:

Explanation:

What???

Buoyancy force can be calculated with the equation

\(Fb = Vs × D × g\)

where

In this case, the weight of the ball is 5 kg and the density of the ball is 2× 10⁴kg/m³

Therefore the volume is given as

\(v = \frac{m}{d} = \frac{5}{2 \times 10 {}^{4} kgm {}^{ - 3} } \\ v = \: \frac{5}{20000} m {}^{ - 3} \)

Substituting the given values in the equation, we get,

\(Fb=Vs \times D \times g \\ Fb = \frac{5}{20000} m {}^{3} \times 5000kgm {}^{ -3} \\ \times10ms {}^{ - 2} \\ = 12.5N\)

Answer: 1.15 s

Explanation:

Given

Height of rock h=6.5 m

The horizontal speed of tiger u=3.5 m/s

In the vertical direction, there is no initial speed

Using the equation of motion

\(\Rightarrow h=ut+\frac{1}{2}at^2\\\\\Rightarrow 6.5=0+\frac{1}{2}\times 9.8\times t^2\\\\\Rightarrow t=\sqrt{\dfrac{13}{9.8}}=1.15\ s\)

Time taken is 1.15 s

Answer:

9

Explanation:

You divide the joules by the coulombs to find the voltage of the battery so, 27/3= 9

A. The area of the plates is 1.27 x 10^-3 m^2

B. The maximum charge stored is 225 pC

a. The capacitance of a parallel plate capacitor is given by the formula:

C = ε0 * εr * A / d

where C is the capacitance, ε0 is the vacuum permittivity, εr is the relative permittivity of the dielectric material, A is the area of the plates, and d is the distance between the plates.

Rearranging the equation, we get:

A = C * d / (ε0 * εr)

Since air is used as the dielectric, εr is approximately equal to 1. Plugging in the given values, we get:

A = 7.50 pF * 1.50 mm / (ε0 * 1) = 11.25 pF * 1.50 mm / ε0

Since ε0 = 8.85 x 10^-12 C^2/N m^2, we get:

A = 11.25 pF * 1.50 mm / 8.85 x 10^-12 C^2/N m^2 = 1.27 x 10^-3 m^2

b. The maximum charge stored in a capacitor is given by the formula:

Q = C * V

where Q is the charge, C is the capacitance, and V is the voltage across the capacitor. Plugging in the given values, we get:

Q = 7.50 pF * 3.00 x 10^4 V/m = 225 pC

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Spring constant k = 75 N/m

Hooke's law for this spring F(x) = 75x

Work = 1.5 J

                                          \($W=\int_{a}^{b} F(x) d x$\)

According to Hooke's law, the spring must be held stretched at x=0.2m by a force of 15N.

F (0.2) = k (0.2 m) = 15 N

Solve for k

k = 75 N/m

Hence, Hooke's law is F(x) = 75x

The spring is compressed from x = 0 to X = 0.2,

\($W=\int_{0}^{0.2} 75 x d x=\left.\left(\frac{75 x^{2}}{2}\right)\right|_{0} ^{0.2}$\)

W = 1.5 J

So, the work is required to compress the spring 0.2 m from its equilibrium position W = 1.5 J

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To find the magnitude of x in the given system of equations, (1- j9)x + (2 + j10)y = 4 + j3 and (2 - j2)x + (7 - j6)y = -5 + j17,

Step 1: Represent the given equations in matrix form.
A = [ [1 - 9j, 2 + 10j], [2 - 2j, 7 - 6j] ]
B = [ [4 + 3j], [-5 + 17j] ]

Step 2: Solve for the inverse of matrix A, denoted as A_ inv.
A_ inv = 1/det(A) * ad jugate(A), where det(A) is the determinant of matrix A and ad jugate(A) is the ad jugate of matrix A.

Step 3: Compute the determinant of matrix A.
det(A) = (1 - 9j)(7 - 6j) - (2 + 10j)(2 - 2j) = 23 - 56j

Step 4: Compute the ad jugate of matrix A.
ad jugate(A) = [ [7 - 6j, -2 - 10j], [-2 + 2j, 1 - 9j] ]

Step 5: Compute the inverse of matrix A.
A_ inv = 1/(23 - 56j) * [ [7 - 6j, -2 - 10j], [-2 + 2j, 1 - 9j] ]

Step 6: Solve for the matrix X by multiplying A_ inv with B.
X = A_ inv * B = [ [x], [y] ]

Step 7: Find the magnitude of x.
magnitude(x) = |x|

After performing the calculations, the magnitude of x is found to be approximately 0.4224.

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Answer:the magnitude of the hikers resultant displacement

Explanation:

If the resistance remains constant and the voltage doubles, the power will increase by a factor of 4 (option E)

The following data were obtained from the question:

P = V² / R

Resistance is constant, we have

V₁² / P₁ = V₂² / P₂

V² / P = (2V)² / P₂

V² / P = 4V² / P₂

Cross multiply

V² × P₂ = P × 4V²

Divide both side by V²

P₂ = P × 4V² / V²

P₂ = P × 4

From the above, we can conclude that the power will increase by a factor of 4 (option E)

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Answer:

it will option C this is the correct answer of this question

Digital data can usually be recovered even if the storage device if it stops working and memory chips don't break easily. So, the correct options are B and D.

Digital storage of data is defined as the process that usually involves saving computer files or documents on magnetic storage devices, usually flash memory which may include hard drives, memory sticks or cards, optical discs , cloud storage, etc. are included.

Reliable storage ensures that which computer files or documents are easily accessible and can be recovered in the event of loss. Digital data can usually be recovered even if the storage device fails, as long as the memory chips are not easily breakable.

So, the correct options are B and D.

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The axial resistance of an axon is calculated using the formula R = ρL/A, where ρ is the resistivity, L is the length, and A is the cross-sectional area. In this case, the axial resistance is 11.28 MΩ.

The resistance along the axon is calculated using the following formula:

R = ρL/A

where:

R is the resistance in ohms

ρ is the resistivity in ohms per meter

L is the length in meters

A is the cross-sectional area in meters squared

In this case, we have:

ρ = 1.6 x 107 Ω.m

L = 0.5 mm = 0.0005 m

A = πr² = π(5 x 10-6)² = 7.854 x 10-13 m²

Therefore, the resistance is:

R = ρL/A = (1.6 x 107 Ω.m)(0.0005 m) / (7.854 x 10-13 m²) = 11.28 MΩ

Therefore, the axial resistance of the axon is 11.28 MΩ.

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The volume of the balloon is increased to 2.9 L.

Initial volume of the balloon, V₁ = 0.5 L

Initial temperature of the balloon, T₁ = 20°C = 293 K

Final temperature, T₂ = 150°C = 423 K

According to Charle's law,

V₁/T₁ = V₂/T₂

The final volume,

V₂ = (V₁/T₁)T₂

V₂ = 0.5 x 423/293

V₂ = 2.9 L

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Your question was incomplete, but most probably your question will be:

A balloon has a volume of 0.5 L at 20°C. If the balloon is heated to 150°C, assuming the atmospheric pressure to be constant at 101,325 pa, by what amount does the volume of the balloon change?

The thermos performed differently when compared with the control and room temperature.

Based on the data and graphs, it is evident that each thermos exhibited varying performance levels when compared with the control and room temperature.

Thermos A maintained the desired temperature for an extended period compared to the control and room temperature. It showed minimal heat transfer and consistently kept the contents hot/cold for a longer duration. The graph indicates a gradual decrease in temperature over time, suggesting its superior insulation capabilities.

Thermos B, on the other hand, performed slightly better than the control but not as effectively as Thermos A. It maintained the desired temperature for a reasonable duration, but the graph demonstrates a slightly steeper decline in temperature compared to Thermos A. This indicates a relatively higher rate of heat transfer, although still better than the control and room temperature.

Thermos C performed similarly to the control and room temperature. It struggled to retain the desired temperature and displayed a significant drop in temperature over a short period. The graph indicates poor insulation, resulting in faster heat transfer.

In summary, Thermos A outperformed both the control and room temperature by maintaining the desired temperature for a longer duration. Thermos B showed improvement over the control, albeit not as effectively as Thermos A. Thermos C exhibited inadequate insulation and struggled to retain the desired temperature.

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Answer:

a convex lens forms a larger, virtual image

Explanation:

The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.

A convex is defined as a lens in which the reflecting surface is bent inwards. It is thicker in the middle and thinner at the edges.

Here,

The convex lenses are the type of lens that can converge the beam of light coming from outside and reflect the rays and focus them on a point at the other side.

Convex lens is also known as a converging lens.

The image of the object here is formed on the opposite side of the object, so it is a virtual image that has been formed here.

The size of the image formed here is larger when compared to the size of the object. Thus larger image formed.

Thus the convex lens formed a larger and virtual image of the object here.

Hence,

The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.

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The time it will take her to land on the other side is 0.5 seconds.

In a triangle with three angles of 30°, 60°, and 90°, the hypotenuse is twice as long as the shorter leg and three times as long as the latter. To understand why this is the case, consider that the triangle is a right triangle given these numbers according to the Converse of the Pythagorean Theorem. The lengths of the three sides in a triangle of this kind are referred to as a Pythagorean triple.

distance = velocity x time

In this case, the distance is 3 meters and the velocity is 6 m/s, so:

3 = 6 x time

Solving for time, we get:

time = 3/6 = 0.5 seconds

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