please help me work through this its a bit complicated, thank you!

Answer:

Efficiency = 71%

Explanation:

Given the following data:

Output energy = 250 Joules

Input energy = 350 Joules

To find efficiency;

\( Efficiency = \frac {Out-put \; energy}{In-put \; energy} * 100 \)

Substituting into the equation, we have;

\( Efficiency = \frac {250}{350} * 100 \)

\( Efficiency = 0.7143 * 100 \)

Efficiency = 71.43 ≈ 71%

Therefore, the efficiency of the candle is 71 percent.

The constant acceleration of a rocket launched upward, calculated knowing that the time it takes for a bolt that falls off the side of the rocker was 6.30 seconds, is 5.68 m/s².                                                                                      

When the rocket is launched straight up with constant acceleration, the acceleration of the rocket is given by:

\( v_{f_{r}} = v_{i_{r}} + at \)    

Where:                                                              

\(v_{f_{r}}\): is the final velocity of the rocket

\(v_{i_{r}}\): is the initial velocity of the rocket = 0

a: is the acceleration

t: is the time

After 4 seconds, the final speed of the rocket will be the initial speed of the bolt, so:                                              

\( v_{f_{r}} = v_{i_{b}} = at = 4a \)  

When the bolt falls off the side of the rocket, the bolt hits the ground 6.30 seconds later.        

The initial height of the bolt will be the final height of the rocket, and vice-versa. With this, we can take the final height of the bolt as zero.                        

\( y_{f_{b}} = y_{i_{b}} + v_{i_{b}}t - \frac{1}{2}gt^{2} \)

\( 0 = y_{i_{b}} + v_{i_{b}}t - \frac{1}{2}gt^{2} \)

\( y_{i_{b}} = \frac{1}{2}9.81*(6.30)^{2} - 4a*6.30 = 194.7 - 25.2a \)

Now, as we said above, this height (of the bolt) will be the final height of the rocket, so:

\( y_{f_{r}} = y_{i_{r}} + v_{i_{r}}t - \frac{1}{2}gt^{2} \)

\( 194.7 - 25.2a = 0 + 0 - \frac{1}{2}a(4)^{2} \)    

\( a = \frac{194.7}{33.2} = 5.86 m/s^{2} \)    

Therefore, the acceleration of the rocket is 5.68 m/s².

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The force required to keep the block moving at a constant velocity to the right is equal to the force of kinetic friction. In this case, the force required is 31.36 N.

To calculate the force required to keep the block moving at a constant velocity to the right, we need to consider the forces acting on the block.

1. First, let's find the gravitational force acting on the block. The formula for gravitational force is F_gravity = m * g, where m is the mass of the block and g is the acceleration due to gravity (approximately 9.8 m/s^2).
  Plugging in the values, we get F_gravity = 4 kg * 9.8 m/s^2 = 39.2 N.

2. Next, let's determine the force of kinetic friction acting on the block. The formula for kinetic friction is F_friction = μ * N, where μ is the coefficient of kinetic friction and N is the normal force. The normal force is equal to the gravitational force acting on the block, which we calculated earlier as 39.2 N.
  Plugging in the coefficient of kinetic friction, μ = 0.8, we get F_friction = 0.8 * 39.2 N = 31.36 N.

3. Since the block is moving at a constant velocity, we know that the net force acting on the block is zero. Therefore, the force required to keep the block moving at a constant velocity to the right is equal to the force of kinetic friction.
  In this case, the force required is 31.36 N.


1. Gravitational force (F_gravity) is calculated using the formula F_gravity = m * g, where m is the mass of the block and g is the acceleration due to gravity (approximately 9.8 m/s^2). In this case, F_gravity = 4 kg * 9.8 m/s^2 = 39.2 N.

2. Kinetic friction force (F_friction) is determined using the formula F_friction = μ * N, where μ is the coefficient of kinetic friction and N is the normal force. The normal force is equal to the gravitational force acting on the block, which we calculated earlier as 39.2 N. Plugging in the coefficient of kinetic friction, μ = 0.8, we get F_friction = 0.8 * 39.2 N = 31.36 N.

3. Since the block is moving at a constant velocity, the net force acting on the block is zero.

Therefore, the force required to keep the block moving at a constant velocity to the right is equal to the force of kinetic friction. In this case, the force required is 31.36 N.

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Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

v is the velocity

m is the mass

From the question we have

\(k = \frac{1}{2} \times 1300 \times {20}^{2} \\ = 650 \times 400 \\ = 260000\)

We have the final answer as

Hope this helps you

1.1×10^8 m^2 is the required surface area of each plate. is this plate size realistic.

The formula C=Ad C = A d, where C is the value of the capacitance, A is the area of each plate, d is the distance between the plates, and is the permittivity of the material between the plates of the parallel capacitor, gives the capacitance for parallel plate capacitors (dependent on its geometry).

C=εoA /d

∴A= Cd / εo

=(1)(10)^-3  /8.86×10 ^(−12)

=1.1×10^8 m^2

hence the surface area of each plate 1.1×10^8 m^2.

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Each solution tested has its advantages and disadvantages. The most effective solution depends on the situation and the amount of oil that needs to be removed from the water.

The three solutions tested to remove oil from water are scooping the oil with a spoon, absorbing the oil with a paper towel, and using soap to break up the oil. Each solution has its advantages and disadvantages. Scooping the oil with a spoon is an effective solution to remove a significant amount of oil quickly. However, it is not a practical solution for removing a large amount of oil. The disadvantage is that it spreads the oil around the surface of the water and leaves some oil in the water. Absorbing the oil with a paper towel can effectively remove a lot of oil. The advantage is that it removes some oil from the water, leaving it relatively clean. However, it also picks up a lot of water and can't get all of the oil. Using soap to break up the oil is a good solution that removes all of the oil from the water. The advantage is that it removes all of the oil from the water, leaving it clean. However, the disadvantage is that it disperses the oil on the surface of the water, making it harder to remove from the sides of the bowl. In conclusion, each solution tested has its advantages and disadvantages. The most effective solution depends on the situation and the amount of oil that needs to be removed from the water.

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The maximum height reached by the ball is 5 meters (option D).

We can use the following equation:
h = (v^2 * sin^2 θ) / (2g) where h is the maximum height, v is the initial velocity (20 m/s), θ is the angle (30 degrees), and g is the acceleration due to gravity (10 m/s^2).

Plugging in the values, we get:

h = (20^2 * sin^2 30) / (2 * 10)
h = (400 * 0.25) / 20
h = 5 meters

Therefore, the answer is D) 5m.

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Answer:

C. microscope

Explanation:

A simple microscope is magnifying glass, an ordinary double convex lens having a short focal length that produces virtual and erect image.

Answer:

equal to 1

Explanation:

When any ray of light falls or strikes on a surface, the ray is reflected back and the angle of reflection is equal to angle of the incidence, where both the angles are always measured from the path of light that is normal to surface of the point at which the ray of light strikes the surface. This is called as the laws of reflection of light.

And therefore, the ratio of the angle of incidence to the angle of reflection is always equal to 1.

The ratio of time of flight for inelastic collision to elastic collision is 1:2

The given parameters;

Considering inelastic collision, the final velocity of the system is calculated as;

\(m_1u_1 + m_2u_2 = v(m_1 + m_2)\\\\m_1u_1 + 0 = v(m_1 + m_2)\\\\v= \frac{m_1u_1}{m_1 + m_2} \ -- (1)\\\\\)

The time of motion of the system form top of the table is calculated as;

\(v = u + gt\\\\v = 0 + gt\\\\v = gt\\\\t= \frac{v}{g} \\\\t_A = \frac{m_1u_1}{g(m_1 + m_2)} \ \ ---(2)\)

Considering elastic collision, the final velocity of the system is calculated as;

\(m_1u_1 + m_2 u_2 = m_1v_1 + m_2v_2\\\\m_1u_1 + 0 = m_1v_1 + m_2v_2\\\\m_1 u_1 = m_1v_1 + m_2v_2\)

Apply one-directional velocity

\(u_1 + (-v_1) = u_2 + v_2\\\\u_1 -v_1 = 0 + v_2\\\\v_1 = v_2 -u_1\)

Substitute the value of \(v_1\) into the above equation;

\(m_1u_1 = m_1(v_2 - u_1) + m_2 v_2\\\\m_1u_1 = m_1v_2 -m_1u_1 + m_2v_2\\\\2m_1u_1 = m_1v_2 + m_2v_2\\\\2m_1u_1= v_2(m_1 + m_2)\\\\v_2 = \frac{2m_1u_1}{m_1+ m_2} \ --(3)\)

where;

\(v_2\) is the final velocity of the block after collision

Since the bullet bounces off, we assume that only the block fell to the ground from the table.

The time of motion of the block is calculated as follows;

\(v_2 = v_0 + gt\\\\v_2 = 0 + gt\\\\t = \frac{v_2}{g} \\\\t_B = \frac{v_2}{g} \\\\ t_B = \frac{2m_1u_1}{g(m_1 + m_2)} \ \ ---(4)\)

The ratio of time of flight for inelastic collision to elastic collision is calculated as follows;

\(\frac{t_A}{t_B} = \frac{m_1u_1}{g(m_1 + m_2)} \times \frac{g(m_1 + m_2)}{2m_1u_1} \\\\\frac{t_A}{t_B} = \frac{1}{2} \\\\t_A:t_B = 1: 2\)

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Oscillation is a fundamental factor in sound generation for synthesizers, as they use electronic circuits to generate and control oscillations of various frequencies and waveforms to create different sounds. So, this statement is false

In a synthesizer, an electronic instrument, oscillation is an essential factor in sound generation. Oscillators in a synthesizer generate periodic waveforms, which are then processed and shaped to create various sounds. These oscillations form the basis of the electronic sound produced by the instrument.

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Answer:

Explanation:

This is a recoil problem, which is just another application of the Law of Momentum Conservation. The equation for us is:

\([m_av_a+m_ev_e]_b=[m_av_a+m_ev_e]_a\) which, in words, is

The momentum of the astronaut plus the momentum of the piece of equipment before the equipment is thrown has to be equal to the momentum of all that same stuff after the equipment is thrown. Filling in:

\([(90.0)(0)+(.50)(0)]_b=[(90.0)(v)+(.50)(-4.0)]_a\)

Obviously, on the left side of the equation, nothing is moving so the whole left side equals 0. Doing the math on the right and paying specific attention to the sig fig's here (notice, I added a 0 after the 4 in the velocity value so our sig fig's are 2 instead of just 1. 1 is useless in most applications).

0 = 90.0v - 2.0 and

2.0 = 90.0v so

v = .022 m/s This is the rate at which he is moving TOWARDS the ship (negative was moving away from the ship, as indicated by the - in the problem). Now we can use the d = rt equation to find out how long this process will take him if he wants to reach his ship before he dies.

12 = .022t and

t = 550 seconds, which is the same thing as 9.2 minutes

The amount of gravitational force that acts on a space vehicle while in earth orbit is almost zero but not absolute zero.

There is no ground force or opposing natural force to gravity.

Because the earth is not a perfect sphere, the value of "g" is lowest at the equator. At the equator, its radius is at its largest. Thus, the equator is the location where g will be smallest according to the equation

g = GM/R2.

All items in the planet's gravitational field will be lost in space if gravity abruptly vanishes. We would experience levity. Essentially, if gravity is equal to zero, then there will be no acceleration caused by gravity.

Astronauts can float within their spaceship or outside during a spacewalk in microgravity. Moving heavy stuff is simple. Astronauts, for instance, can merely use their fingertips to manipulate machinery weighing hundreds of pounds.

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Answer:

about 5000 °F

Explanation:

Answer:

4) Coefficent in science

The integral of 3πcosπt is -3πsinπt, so the position function is:s(t) = -3πsinπt

a. The position function is given by the integral of the velocity function:

s(t) = int v(t) dt = int 3πcosπt dt

The integral of 3πcosπt is -3πsinπt, so the position function is:

s(t) = -3πsinπt

b.The graph of the position function is shown below. The mass reaches its lowest point when the sine function is equal to -1, and its highest point when the sine function is equal to 1.

c. The mass reaches its lowest point the first three times at times t = 2π/3, 4π/3, and 6π/3.

d. The mass reaches its highest point the first three times at times t = π/3, 5π/3, and 7π/3.

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Answer:

1. b

2. e

3. a

4. c

5. d

hope dis helps ^-^

What a medium-mass star becomes after a planetary nebula; a very bright, dense mass about the size of the planet Earth. ... The process that generates all of the energy that a star produces. Supernova. A Red Super Giant explodes into this when it runs out of elements to fuse together.

The process that generates all of the energy that a star produces. Supernova. A Red Super Giant explodes into this when it runs out of elements to fuse together. Hence option A is correct.

A red giant is a bright giant star of low or intermediate mass (approximately 0.3-8 solar masses (M)) that has reached the end of its evolutionary cycle. The outer atmosphere is inflated and tenuous, resulting in a wide radius and a surface temperature of 5,000 K (4,700 °C; 8,500 °F) or less. The appearance of red giants ranges from yellow-white to reddish-orange, and includes spectral types K and M, as well as class S and most carbon stars.

Hence option A is correct.

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K type. A giant star is a star with a luminosity class + spectral type of 100 lsun and an absolute temperature of 5000 k.

The total quantity of energy emitted by a star or other astronomical object each second is expressed as luminosity, or L. Therefore, this is how much power a star produces. The bolometric luminosity of a star is the total power production at all wavelengths.

Something's luminosity refers to its capacity to emit light or to reflect light. A big, sparkling diamond's brightness is its most distinguishing feature. You might use the word "luminosity" to describe a vivid and colorful oil painting or to praise the brilliance of a sunset.

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The work was done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\) and at an angle of \(29^o\) 42.83 J.

When an object is moved over a distance by an external force, at least some of that force must be applied in the direction of the displacement. This is known as work in physics. Work may be estimated if the force acting along the path is constant by multiplying the length of the path by the component of the force acting along the path.

To express this formally, the work W is equal to the force f times the length d, or W = fd. The work is W = fd cos if the force is applied at an angle to the displacement.

Given:

The mass, m = 2 kg,

The acceleration, g = 9.81 \(m/s^2\),

θ = angle between block and surface kinetic friction = μ

Calculate the work done by the formula given below,

\(W_{fy}\) = F sinθ

\(W_{fy}\) =  (\(mgsin\)θ)/ (sinθ -  μ * cosθ)

Substitute the values

\(W_{fy}\)  = \((2*9.81 sin29^{o} )/sin29^o - 0.30cos29^o\)

\(W_{fy}\)  = 42.83 J

Therefore, the work done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\), and at an angle of \(29^o\) is 42.83 J.

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The water pressure at the bottom of a geyser decreases when some of the water above gushes out. The result is a decrease in pressure which can cause more water to boil and generate steam, leading to a geyser eruption.

Geysers are hot springs that periodically erupt with boiling water and steam. This happens because water in the ground is heated by magma, which causes it to rise and accumulate in underground reservoirs. As the water heats up, it creates pressure that eventually forces it to escape through a narrow opening, creating the geyser's signature eruption.

As the pressure decreases, the boiling point of the water at the bottom also decreases. If the temperature of the water at the bottom is higher than its new boiling point, it will boil and generate steam. The steam then forces more water out of the geyser, creating an eruption.

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Answer:

V = 18v

Explanation:

total voltage= VC + VR + VL

total voltage= 5 + 8 + 5

total voltage= 18v

Answer:

f = 0.365 Hz

Explanation:

The angular velocity of a simple pendulum is

           w = \(\sqrt{g/L}\)

angular velocity and frequency are related

           w = 2π f

we substitute

           2π f = \(\sqrt{g/L}\)

Let's find the initial length of the pendulum

            L = \(\frac{g}{4\pi^2 } \ f_o\)

            L₀ = \(\frac{9.8}{4 \pi ^2} \ 0.4\)

            L₀ = 0.6206 m

Indicates that the length of the chord triples

             L = 3 L₀

             L = 3 0.6206

             L = 1.8618 m

let's find the frequency

             f = \(\frac{1}{2\pi } \ \sqrt{\frac{9.8}{1.8618} }\)

             f = 0.365 Hz

The  option b, 160 to 167 degrees F, is likely the correct answer.

The primary goal of laundering healthcare linens is to remove soil and microbial contamination to prevent the spread of infections. The temperature of the wash water is a critical factor in achieving this goal because it directly affects the effectiveness of the cleaning and disinfection process.

According to the CDC guidelines, the minimum wash water temperature for processing healthcare linens is 160 to 165 degrees Fahrenheit (71 to 74 degrees Celsius). This temperature range is based on the fact that most bacterial pathogens and viruses are killed at temperatures above 160 degrees Fahrenheit.

It is important to note that different types of healthcare linens may have different temperature requirements based on their fabric type and level of contamination. For example, some delicate fabrics may require lower temperatures to prevent damage, while heavily soiled linens may require higher temperatures to ensure effective cleaning.

In addition to temperature, other factors such as the duration of the wash cycle, detergent selection, and mechanical action are also important in achieving effective cleaning and disinfection of healthcare linens. Proper training and adherence to established laundry protocols are essential to ensure that healthcare linens are processed safely and effectively.

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Answer:

Velocity

Explanation:

Objects in motion usually have a speed which is scalar or velocity which is a vector.

A scalar quantity is one with magnitude but has no directional attribute.

A vector quantity is one with both magnitude and directional attribute.

Speed is a scalar quantity that describes the magnitude of motion a body accrues.

Velocity is a vector quantity that describes both the magnitude of motion and the direction of motion in a body.

Answer:

50m/s2^

Explanation:

We know , by newton's law of motion .

F=ma

a=f/m

a=25/0.5

a=50m/s2^

Therefore , the acceleration of a softball is  .

Answer:

7 m/s²

Explanation: Force = Mass x acceleration  

Also note that 1 N = 1 kg.m/s²

a=F/ m

a= 35 N/ 5 kg = 35 kg.m/ s²  ÷  kg                 Aside:( so you cross out the kg)

a= 7 m/s²

The value of resistor R that gives the circuit in the figure a time constant of 22 μs is 220 Ω.

The circuit that is in the figure is shown below:Given that time constant (RC) = 22 μs. To find the value of resistor R, we need to use the formula for the time constant:

RC = τ, where R is the resistance and C is the capacitance of the circuit.

Rearranging the above formula, we get:R = τ / C

Where τ is the time constant and C is the capacitance of the circuit.

From the figure, the capacitance is given as 0.1 μF

.Substituting the values of τ and C in the above formula, we get:

R = (22 × 10⁻⁶ s) / (0.1 × 10⁻⁶ F)

R = 220 Ω

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Answer:

transformation into physics??? were you asking for the translation or what?

Answer:

Explanation:

Un CAMBIO FÍSICO es una transformación en la que no varía la naturaleza de la materia. ... Cuando en una transformación de la materia una o más de estas sustancias puras "desaparecen" se está produciendo un cambio químico o reacción química.

Answer:

Diffusion of water, salts, and waste products occurs in the kidneys. Diffusion of calcium from food into cells occurs in the intestines. Molecules are not the only things that can diffuse. Heat from the body diffuses away in the form of sweat that evaporates.

Explanation:

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