The ratio of the maximum efficiencies with which engines can turn heat into work and work into heat, EHW / EWH a. is always less than b. is always greater than c. equals 1.
d. usually equals 0.

The correct option is B. Her trajectory will her center of mass be 1.0 seconds later at the apex.

\(V = V_0 - g*t\)

where,

\(V_0 = initial velocity\)

acceleration due to gravity  = 9.8 m/s^2

t = 1.0 seconds

substituting the above values in the equation;

\(V_0 = 9.8 m/s + 9.8m/s^2*1.0 sec\\V_0 = 19.6 m/s\)

**Hence after 1.0 sec the gymnast would almost reach 19.6 m as distance.

According to the trajectory of mass thrown uniformly,

\(H_(max)= v^2/ 2*g = 19.6^2/2*9.8 = 19.6 m\) ----> indicates the mass reaches the peak after a time of 1.0 seconds

Speed is the directional velocity of an item in motion as an indication of its price of exchange in the role as located from a selected frame of reference and as measured through a specific widespread of time (e.g. 60 km/h northbound). speed is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of our bodies.

Velocity is a physical vector amount; both value and route are had to outline it. The scalar absolute value (magnitude) of velocity is referred to as pace, being a coherent derived unit whose quantity is measured in the SI (metric system) as meters according to 2nd (m/s or m⋅s−1). as an example, "five meters per 2d" is a scalar, while "five meters in keeping with 2d east" is a vector. If there may be a change in velocity, course, or both, then the object is said to be present process an acceleration.

To learn more about Velocity visit here:

brainly.com/question/30559316

#SPJ4

Complete Question:

If a gymnast leaves the ground with a vertical velocity of 9.81 m/s when doing a back flip, where in her trajectory will her center of mass be 1.0 sec later? Show the equation applied!

a) Approaching the apex

b) at the apex

c) descending from the apex

d) on the ground

e) not enough information

Time required by the light to get to the earth from the moon is 0.00101 seconds.

Average distance between moon and the sun is 3.84 x 10^5 m.

As we know that, light is an electromagnet wave, it does not requires a medium to travel, so it will travel with the speed of 3.8 x 10^8 m/s.

Hereby, it is known to us that,  

Speed = Distance/Time.

Time required by the light to travel from moon to the earth can be find by using,

Time = Distance/Speed

Time = 3.84x10^5/3.8x10^8

Time = 1.01 x 10^-3

Time = 0.00101 seconds.

As the speed of light taken was already in unit of Meter per second. So, the answer will be in seconds.

To know more about Speed of Light, visit

https://brainly.com/question/104425

#SPJ9

Answer:

About 3.54x1022 N.

Explanation: The gravitational force between the Sun and the Earth is about 3.54x1022 N. This force keeps the Earth orbiting around the Sun. The gravitational force from the other planets does slightly affect the Earth's orbit, but the gravitational pull from the other planets and the Moon is still very small. Sorry if I get this wrong. I am in 5th grade! ♥

Answer:

the voltage is the same in all parallel components because by definition you have connected them together with wires that are assumed to have negligible resistance. the voltage at each end of the wire is the same ( ideally ) . so all the components have to have the same voltage.

Unfortunately, the information about trial 3 and the rate of reaction is missing in the given question. Without specific data or context,

The given question asks for the rate of reaction in trial 3 but does not provide the necessary information to calculate it. In order to determine the rate of reaction, specific data such as the change in concentration or the time taken for the reaction needs to be provided. Without this information, it is not possible to accurately determine the rate of reaction. The rate of reaction is a measure of how quickly reactants are converted into products and is influenced by factors such as temperature, concentration, and the presence of catalysts. Therefore, without the relevant data for trial 3, it is not possible to calculate or provide an answer regarding the rate of reaction in that specific trial.

Learn more about specific here;

https://brainly.com/question/5135413

#SPJ11

The vertical and horizontal parts of a projectile are perpendicular and independent of one another over a short distance.

Depending on the force imposed on it, horizontal motion is defined as a projectile motion in a horizontal plane. The vertical and horizontal parts of a projectile are perpendicular and independent of one another over a short distance.

Throughout the course of a projectile's flight, the horizontal component of its speed remains constant. This is because the projectile experiences no horizontal force after being launched. As a result, the projectile moves horizontally at a fixed speed.

The following equation is used to determine how far a bullet travels;

d = vt, where

t = Time

d = Distance

v = velocity

Learn more about the projectile motion here:

https://brainly.com/question/11049671

#SPJ4

We will have the following:

First, we transform the revolutions per second to radians, that is:

Now, we will have that the final angular velocit will be given by:

So, the angular speed after coupling is -12pi/s. [That is the total angular speed will be counterclock wise]

We need to use two rays, such as one that is parallel to the principal axis and one that passes through the focal point, to locate the virtual image in a planar mirror or due to reflection at a flat surface.

To find a virtual image in a planar mirror or due to reflection at a flat surface, one needs to use at least two rays. The image is located where the light rays intersect.

Virtual imageVirtual images are images that are not real; instead, they are created by our eyes when light rays appear to come from a point behind a surface. Virtual images are formed when light rays appear to diverge from a point behind a mirror or lens, rather than converging to that point. If we hold a piece of paper against a mirror and move it around, we'll notice that we can see the image in various locations behind the mirror. As a result, virtual images have no physical existence and cannot be projected onto a screen.

For finding the virtual image in a planar mirror or due to reflection at a flat surface, one needs to use at least two rays. One of the most important concepts in geometric optics is that when light strikes a surface, it is reflected, refracted, or absorbed. Because of the law of reflection, it is simple to determine the location of the virtual image of an object reflected by a flat surface. We need to use two rays, such as one that is parallel to the principal axis and one that passes through the focal point, to locate the virtual image in a planar mirror or due to reflection at a flat surface.

To learn more about virtual visit;

https://brainly.com/question/31674424

#SPJ11

If a wave has a wavelength of 2.5 m and a frequency of 150 Hz, then the speed of the wave would be

It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.

As given in the problem If a wave has a wavelength of 2.5 m and a frequency of 150 Hz, then we have to find the speed of the wave,

The speed of the wave = frequency of the wave ×  wavelength

                                       = 150 × 2.5

                                       =375 meters / seconds

Thus, the speed of the wave would be 375 meters / seconds.

To learn more about wavelength from here, refer to the link;

brainly.com/question/7143261

#SPJ1

The Fisher hypothesis, proposed by economist Irving Fisher, relates the nominal interest rate (i) to the real interest rate (r) and the expected inflation rate (π). According to the Fisher hypothesis, the nominal interest rate is equal to the sum of the real interest rate and the expected inflation rate.

To calculate the nominal interest rate, we can use the following formula:

i = r + π

Given that the annual real rate of interest (r) is 6% and the expected inflation rate (π) is 2%, we can substitute these values into the formula to find the nominal interest rate (i):

i = 6% + 2% = 8%

Therefore, the nominal interest rate, according to the Fisher hypothesis, would be 8%.

The Fisher hypothesis suggests that if the real interest rate remains constant, changes in the expected inflation rate will lead to corresponding changes in the nominal interest rate. When expected inflation is higher, lenders will demand higher nominal interest rates to compensate for the erosion of purchasing power over time. Conversely, if expected inflation is lower, nominal interest rates may decrease as lenders require less compensation for inflation.

It is important to note that the Fisher hypothesis assumes rational expectations, meaning that individuals accurately predict future inflation rates. In practice, however, inflation expectations can be influenced by various factors, and actual inflation may deviate from expectations. Nonetheless, the Fisher hypothesis provides a useful framework for understanding the relationship between real and nominal interest rates in an inflationary environment.

Learn more about Fisher Hypothesis :

https://brainly.com/question/24320160

#SPJ11

Wires often break in the winter season due to several factors such as cold weather, ice, and snow accumulation. The technician likely advised the person to stay inside the car because the car acts as a protective cage that can prevent electric shock. it is essential to stay inside the car until trained professionals arrive to safely remove the high voltage wire and ensure that the area is safe.

a. Wires often break in the winter season due to several factors such as cold weather, ice, and snow accumulation. These conditions can cause the wires to become brittle, and if they are subject to mechanical stress, they can break easily.

b. The technician likely advised the person to stay inside the car because the car acts as a protective cage that can prevent electric shock. When a high voltage wire falls on a car, the car's metal body acts as a Faraday cage, which protects the person inside from electric shock.

c. If the person were to open the car door and step outside, they would become part of the electrical circuit and could be subject to electric shock. Electric shocks can cause severe injury or death, depending on the severity of the shock and the duration of exposure. Therefore, it is essential to stay inside the car until trained professionals arrive to safely remove the high voltage wire and ensure that the area is safe.
for more such questions on Wires
https://brainly.com/question/30997672
#SPJ11

Answer:

c) Liquid

Explanation:

Liquid takes the shape of its container and has a specific volume. On the other hand, solid and gas don't.

The distance xcm from the mortar to the center of mass of the exploded pieces is xcm = 1.00d.

Therefore, the distance xcm from the mortar to the center of mass of the exploded pieces is found as follows:

When an object is thrown upward, it will move upward until the velocity reaches zero at its highest point. The acceleration of an object in free fall is -9.81 m/s². This acceleration is constant since it is only affected by gravity. Therefore, the distance traveled by an object in free fall is given by the formula

d = v₀₊ + 1/2gt²

Where v₀ is the initial velocity (in this case, ₀ since the objects are at rest at the moment of explosion), t is the time of flight, g is the acceleration due to gravity.

Since both pieces land at the same time, they have the same time of flight. We can set the distance traveled by the two pieces equal to each other and solve for xcm. That is

d₁ = d₂

v₀₊ + 1/2gt² = v₀₊ + 1/2gt²

Canceling v₀₊ and solving for t, we have

t = √(2d/g)

Substituting this value of t into the first equation above, we have

d₁ = 1/2gt²

d₂ = 1/2gt²

Substituting the given value of g = 9.81 m/s² and assuming that d₁ + d₂ = xcm, we have

xcm = 1/2gt²
       = 1/2(9.81)(2d/g)
       = 1.00d

Therefore, the distance xcm from the mortar to the center of mass of the exploded pieces is xcm = 1.00d.

Full task:

The two exploded pieces of the shell land at the same time. At the moment of landing, what is the distance xcm from the mortar to the center of mass of the exploded pieces?

Learn more about distance: https://brainly.com/question/28551043

#SPJ11

The speed of the ambulance is approximately 187.27 m/s. To calculate the speed of the ambulance, we can use the formula for the Doppler effect.

The Doppler effect relates the frequency of the sound emitted by the ambulance to the frequency detected by the detector:

f_detected = f_emitted * (v_sound + v_detector) / (v_sound + v_ambulance)

where v_sound is the speed of sound in air, v_detector is the speed of the detector (which we assume to be zero), and v_ambulance is the speed of the ambulance. We know that f_detected = 0.55f_emitted when the ambulance has passed the detector, and that f_emitted is constant. We can also substitute v_sound = 340 m/s.

Thus, we have:
0.55f_emitted = f_emitted * (340 + 0) / (340 + v_ambulance)

Solving for v_ambulance, we get:
v_ambulance = 187.27 m/s

Therefore, the speed of the ambulance is approximately 187.27 m/s.

Learn more about Doppler effect here:

https://brainly.com/question/15318474

#SPJ11

The value of the final angular velocity = 0.44 rev/s

Let Initial angular momentum = \(L_{i}\)

Let Final angular momentum = \(L_{f}\)

Here, mass of merry go round = \(m_{m}\) = 120 kg

radius= r = 1.8 m

initial angular velocity = \(w_{i} = 1.2 \pi\)rad/s

mass of the child = \(m_{c}\) = 21kg

By law of conservation of angular momentum,

\(L_{i}=L_{f}\\\\I_{m}w_{i}=I_{m+c} w_{f}\\\\w _{f} =\frac{I_{m}w_{i}}{I_{m+c}}\)

Here, substitute  \(I = \frac{mr^{2} }{2}\)

\(w _{f} =\frac{I_{m}w_{i}}{I_{m+c}}\\\\w _{f} =\frac{\frac{m_{m}{r _{m}}^{2}}{2} w_{i}}{\frac{m_{m}{r _{m}}^{2}}{2}+{m_{c}r_{c}}^{2} }\\\\w _{f}= \frac{\frac{120(1.8)^{2} }{2} *1.2\pi}{\frac{120(1.8)^{2} }{2} +21(1.8)^{2}}\\\\w _{f} = 2.8 rad/s\)

The value of the final angular velocity = 2.8 rad/s

                                                                =2.8/2 π

                                                                = 0.44rev/s

To learn more about angular velocity, refer:

https://brainly.com/question/20432894

#SPJ4

Any amount of particles with 55 protons and a different number of neutrons than 82 would represent an isotope of Cesium-137.

An isotope of Cesium-137 would have the same number of protons (55) as regular Cesium-137, but a different number of neutrons. Therefore, the amount of particles that represents an isotope of Cesium-137 would be the one with the same number of protons and a different number of neutrons. The atomic mass of regular Cesium-137 is 137, which means it has 82 neutrons (137 - 55). Therefore, any amount of particles with 55 protons and a different number of neutrons than 82 would represent an isotope of Cesium-137. In summary, Isotopes are elements with the same number of protons but different numbers of neutrons.

To learn more about isotope click here https://brainly.com/question/29899412

#SPJ11

An isotope of Cesium-137 contains 55 protons and 82 neutrons, resulting in a total of 137 particles in its nucleus. This specific isotope is represented by the symbol Cs-137.

An isotope of Cesium-137 is any sample that contains the same number of particles as a pure sample of Cesium-137, which has 55 protons and 82 neutrons. Therefore, any sample with 137 particles that includes 55 protons and 82 neutrons would be an isotope of Cesium-137.It is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons.  

Learn more about Cesium-137 here:

https://brainly.com/question/27475737

#SPJ11

Answer:

Rachels car moves and ashleys stops

Explanation:

When Ashley's moving car collides with Rachel's bumper car which is at rest then some of the momentum of Ashley's car is transferred to Rachel's car causing it to move.

Conservation of momentum states that the momentum of a system is constant if there is the absence of external forces on the system. The momentum of an object can be conserved and is a vector quantity.

Momentum can be defined as the multiplication of the mass of a particle and its velocity. The law of conservation of momentum is confirmed by experiment and can be deduced mathematically on the presumption that space is uniform.

Conservation of linear momentum is derived from Newton’s second law of motion states that the total momentum remains the same in an isolated system.

The total momentum of  Ashley's car and Rachel's car remains conserved. After the collision, the momentum transferred from  Ashley's car and Rachel's car which makes it move.

Learn more about the conservation of momentum, here:

https://brainly.com/question/3920210

#SPJ5

To determine the size of the copper conductor needed for a branch circuit, we need to consider the load and the allowable ampacity. The National Electrical Code (NEC) provides guidelines for selecting conductor sizes based on the expected load and the length of the circuit.

Here are the steps to calculate the conductor size:

1. Determine the load: Find out the total load that will be connected to the circuit. This includes all the devices and appliances that will be powered by the circuit.

2. Calculate the ampacity: Ampacity is the maximum current that a conductor can carry without exceeding its temperature rating. It is determined by the type of conductor and its size. Refer to the NEC tables to find the ampacity rating for the specific conductor size.

3. Consider the length of the circuit: Longer circuits experience more resistance, which affects the ampacity. Refer to the NEC tables to find the adjusted ampacity based on the length of the circuit.

4. Apply the derating factors: Depending on the type of installation and the number of conductors in the circuit, derating factors may be applied to the ampacity. Refer to the NEC for the specific derating factors.

5. Select the conductor size: Compare the adjusted ampacity with the load. Choose the conductor size that has an ampacity rating equal to or greater than the calculated load.

To know more about resistance visit:

https://brainly.com/question/33728800

#SPJ11

the Carnot efficiency and how it relates to temperature. The Carnot efficiency is the maximum possible efficiency of a heat engine operating between two temperatures, and it is calculated by dividing the difference in temperature between

the hot and cold reservoirs by the temperature of the hot reservoir. This is expressed as:aEfficiency = (Th - Tc) / Th
Where Th is the temperature of the hot reservoir and Tc is the temperature of the cold reservoir.To achieve a Carnot efficiency of 30%, we need to solve for Th in the equation above. Rearranging the equation, we get:


where T_low is the low temperature, T_high is the high temperature, and the efficiency is expressed as a decimal (i.e., 30% = 0.3). We need to solve for T_high: 0.3 = 1 - (T_low / T_high)We don't have a specific value for T_low in the question, so let's assume T_low = 273 K, 0°C.Now, we can solve for T_high: 0.3 = 1 - (273 / T_high)0.3 * T_high = 273T_high = 273 / 0.3T_high ≈ 910 K this value is not among the provided options. Without knowing the exact value of T_low, we can't determine which option is correct. To we would need more information about the system or the value of T_low.

To know more about temperature Visit;

https://brainly.com/question/1832557

#SPJ11

Statement:

A non-deformed spring is 15 cm long. When a 2.0 N force is applied to it, its length becomes 19 cm.

To find out:

The spring constant of the spring.

Solution:

Answer:

The spring constant of this spring is 50 N/m.

Hope you could understand.

If you have any query, feel free to ask.

Answer:

O- to track how fast a heart beats

Explanation:

Answer:

O. 5 g

Explanation:

It literally says for every cm3 its 0.5 g

λ = 5 x 10^-7 m, i.e the wavelength

the energy in the wave.

= c / λ

c =( 3 x 10^ 8 m/s)

f = 3x10^8ms-¹ /5 x10^-7m

= 6x10^14 Hz.

Given,

\(Ax =26 m/s^{2} \\Ay = 10 m/s^{2}\)

As we know that slope of any line passing from (x,y) point has the slope as  \(\frac{y}{x}\)  i.e. Tan \(\alpha\)

Vector's Direction can be calculated by \(\alpha\) = Tan⁻¹ \(\frac{Y}{X}\) ,

where \(\alpha\) is the angle with the horizontal X-axis.

therefore,

\(\alpha\) = Tan⁻¹ \(\frac{10}{26}\)

\(\alpha\) = 23.375°

The vector's direction is the angle that the vector makes with the horizontal axis, i.e. with the X-axis. The direction of the vector is given by turning the angle of the vector around its tail to the east counterclockwise.

Therefore, the vector's direction for the given vector is 23.375° from the X-axis i.e. the vector Ax  = 26 m/s2, Ay= 10 m/s2 points towards the North-East direction.

To know more about Vector's Direction,

https://brainly.com/question/12887326

#SPJ4

Answer:

microwave, and the sun

Explanation:

the microwave uses radiation waves to heat the food, the sun has gamma rays which are also radiant

Correct choices are

Every material on the earth releases radiation of different frequency and wavelengths.

Let us consider each of the choices one by one.

Earth is heated by energy from the Sun.

A hot dog is held over a fire and gets warm.

Soup is heated in a microwave. YES

Water is boiled in a pot on a stove burner.

Hence the correct choices are

To know more about radiation follow

https://brainly.com/question/893656

The sample standard deviation is approximately 4.69.

Let's perform the calculations:

1. Calculate the mean:

Mean (x) = (1 + 12 + 3 + 2 + 1) / 5 = 19 / 5 = 3.8

2. Calculate the difference between each value and the mean:

1 - 3.8 = -2.8

12 - 3.8 = 8.2

3 - 3.8 = -0.8

2 - 3.8 = -1.8

1 - 3.8 = -2.8

3. Square each difference:

\((-2.8)^2\) = 7.84

\((8.2)^2\) = 67.24

\((-0.8)^2\) = 0.64

\((-1.8)^2\) = 3.24

\((-2.8)^2\) = 7.84

4. Calculate the sum of the squared differences:

Sum of squared differences = 7.84 + 67.24 + 0.64 + 3.24 + 7.84 = 87.8

5. Calculate the sample variance:

Sample variance (\(s^2\)) = Sum of squared differences / (n - 1) = 87.8 / (5 - 1) = 87.8 / 4 = 21.95

6. Take the square root of the sample variance to obtain the sample standard deviation:

Sample standard deviation (s) = √(\(s^2\)) = √(21.95) ≈ 4.689

Rounding to the nearest 100th, the sample standard deviation is approximately 4.69.

Know more about standard deviation:

https://brainly.com/question/31516010

#SPJ4

The environment was quite different. Based on the sediment in the rock sample (photograph X), it is likely that this area was once covered by a shallow sea or ocean. The presence of fine-grained sediment, such as silt and clay, suggests that the water was relatively calm and quiet.

About 290 million years ago, during the Paleozoic era, Kansas was covered by a shallow sea known as the Permian Sea. The sedimentary rocks found in Kansas, including limestone, sandstone, and shale, were deposited in this sea over millions of years.

The environment in which sediment is deposited can provide clues about the conditions of the area at the time. Based on the type of rock you mentioned, it is likely that the sediment was deposited in a marine environment, such as a shallow sea or a shoreline. The limestone could have been formed from the accumulation of shells and other organic material from marine organisms, while the sandstone and shale could have been deposited by erosion and transport of sediment from nearby land.

In terms of the landscape, it is possible that the area that is now Kansas was a low-lying coastal plain, with rivers and streams carrying sediment into the sea. The rolling hills and farm fields seen today are a result of more recent geologic processes, such as erosion and deposition by wind and water.

Overall, the sediment in the rock sample you mentioned was likely deposited in a marine environment in what is now Kansas, during the time period of the Permian Sea.

Learn more about the Paleozoic era:

https://brainly.com/question/1972972

#SPJ11

Answer:7.92 m/s

Explanation:

A ball is thrown horizontally from the roof of a building 50. m tall and lands 45 m from the base then the ball's initial speed is 14.10 m/s

The rate of change of position of an object in any direction is called speed. Speed is scalar quantity.

speed = distance/time

s=d/t

Where,

s is the speed in m/sec

d is the distance travaled in m

t is the time taken in sec

Given that in the question ball travel a height from building of 50 m to a distance 45 m from the base so total distance travelled is given as 45 m.

Body is travelling downward under the influence of gravity.

Using equation of motion under gravity,

y = ut + ½gt² , where u = 0 m/s in y direction  and

y = ½gt²

t² = 2y / g

t² = 2*50/9.8

t  =  3.19 sec

ball's initial speed in x direction is given as

u = 45/3.19

u= 14.10 m/sec.

The balls initial speed is given as 14.10 m/sec.

To learn more about speed refer to the link

brainly.com/question/28224010

#SPJ2