Worker productivity is one of the most important factors that helps us determine the performance of an economy. Which of the following best describes productivity? a. capital per worker b. total number of hours worked c. per capita gdp d. total output in one year e.percentage change in output

The average velocity is given by

Where d is the distance covered and t is the time taken.

For the given case, we have

d = 75 m

t = 8.9 s

Therefore, the average speed of the hockey player is 8.43 m/s

The hockey player is moving at a speed of 9.5 m/s.

Answer:

Explanation:

3 and 4G networks, Bluetooth, and Wi-Fi technologies. my opinions

Answer:

Suppose the micrometeoroid weighed 1 g = .001 kg

Suppose also the spacecraft were moving at 18,000 mph (1.5 hrs per rev)

Usually, the smaller particle would be moving but for simplicity suppose that it were stationary wrt the ground

v = 18000 miles / hr * 1500 m/mile / 3600 sec/hr = 7500 m/s

KE = 1/2 * .001 kg * (7500 m)^2 = 28,125 Joules

One can see that 28000 Joules could be damaging amount of energy

Answer:

B. reflection

Explanation:

Have a good day! :)

The bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection, so option B is correct.

Reflection is the abrupt change in a wave's propagation direction when it encounters a boundary between two media. The approaching wave disturbance is still present in the same medium, at least in part. At plane borders, reflection happens regularly and follows a straightforward law.

Angles of incidence (between the oncoming wave's direction of motion and a perpendicular to the reflecting surface) are identical to angles between the reflected wave's direction of motion and a perpendicular (angle of reflection). Diffuse reflection occurs at uneven or irregular boundaries. The percentage of the wave's energy that is reflected by a surface material is known as its reflectivity.

Therefore, the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection.

To know more about Reflection:

https://brainly.com/question/2254222

#SPJ6

Answer:

Im pretty sure its c

Explanation:

Explanation:

a. Using the third equation of motion:

v2 = u2 + 2as

from the question;

the jet was initially at rest

hence u = 0

a = 1.75m/s2

s = 1500m

v2 = 02 + 2(1.75)(1500)

v2 = 5250

v = √5250

v = 72.46m/s

hence it moves with a velocity of 72.46m/s.

b. s = ut + 1/2at2

1500 = 0(t) + 1/2(1.75)t2

1500 × 2 = 2× 1/2(1.75)t2

3000 = 1.75t2

1714.29 = t2

41.4 = t

hence the time taken for the plane to down the runway is 41.4s.

Answer: 1. As pen nib is split at the tip to provide the narrow capillary and the ink is drawn upto the point continuously.

2. In oil lamps, the oil is drawn up through the capillary of the wick.

3. Clay soils are damped as the water rises quickly to the surface through the capillaries.

4. Water and minerals rise in the plants through the fine capillaries.

5. Blotting paper absorbs ink through the pores.

In order to determine the type of damping exhibited by the series RLC circuit, we need to look at the values of R, L, and C and calculate the circuit's damping ratio,

which is defined as the ratio of the circuit's damping coefficient to its natural frequency.

The damping ratio (ζ) can be calculated using the following formula:

ζ = R / (2√(L/C))

Plugging in the values given in the question, we get:

ζ = 20,000 / (2√(0.2 x 10^-3 / 5 x 10^-6))

ζ = 20,000 / 2√40

ζ = 20,000 / (2 x 6.324)

ζ = 1578.3

Since the damping ratio (ζ) is greater than 1, the circuit exhibits over-damping. This means that the circuit's response is critically damped, which is characterized by a slow decay without oscillations.

The circuit's output will return to zero after a long time without any overshoot.

In conclusion, the series RLC circuit with R = 20 kΩ, L = 0.2 mH, and C = 5 μF exhibits over-damping, which results in critically damped behavior without any oscillations or overshoot.

To know more about circuit's damping ratio refer here

https://brainly.com/question/29490032#

#SPJ11

Answer:

1.2 m/s^2

Explanation:

average acceleration = vf-vi/t = (15 m/s-0 m/s)/10 s = 1.2 m/s^2

Answer: Your answer is 2 grams!

Explanation: Hope this helps!

Answer:

2000 mg = 2 grams

Explanation:

Have a great rest of your day
Sincerely, the one and only
-Mr. Universe

Answer:

b

Explanation:

Answer:

its b, the sun is directly over earths north end

Explanation:

Answer:In short yes in long

Explanation:yes all substances can exist in any of these three states. In addition to existing in one of the three states, matter can also undergo a change of state. A change of state occurs when matter is converted from one state to another state for example when a liquid is converted to a gas or a solid is converted to a liquid.

Answer:

In the centre of a star, the temperature and pressure are so high that four protons can fuse to form helium, in a series of steps.  

Explanation:

Answer:D a representation of an object system or process

Explanation:

The phrase that best describes a physical model is an exact copy of an object, system or process.

A physical model is defined as a model of any object which can be moved or can be held.

Here,

The physical model can be defined as a larger or smaller copy of the object which is to be represented.

The physical models are made for the perfect examination and study of the the physical characteristics of the particular object.

From the above given data,

There is only one example that can be considered as a physical model of a system.

Chemical formula, graph or equation are just a graphical or written representation of a system.

We know that the physical model must be a similar copy of the system,

An exact copy of an object, system or process is an example of physical model.

Hence,

The phrase that best describes a physical model is an exact copy of an object, system or process.

To learn more about, physical model, click:

https://brainly.com/question/7152996

#SPJ3

Answer:

B

Explanation:

The first modern personality test was the Woodworth Personal Data Sheet, which was first used in 1919. It was designed to help the United States Army screen out recruits who might be susceptible to shell shock.

so, B is correct

Answer:

The answer is B, I hope this helps.

The opposite charges are pulled away in solution and become free. Option D

We know that when we add an ionic substance into water that the ionic substances would become dissolved in the water. The meaning of this is that the ions that are in the substance would be drawn apart by the molecules of water. The process that makes the ions to be drawn apart by water is what we call solvation.

Now when there is solvation, we would notice that the positive end of the water dipole would surround the negative ion and the negative part of the water dipole would surround the positive ion.

Here we can see that the chloride ion is surrounded as such as so also is the potassium ion. This would lead to the pulling apart of the ions by the water and they become free in solution.

Learn more about solvation:https://brainly.com/question/14356923

#SPJ1

Answer:

Explanation:

If dropped from a position of rest, the object will be traveling 9.8 m/s (approximately 10 m/s) at the end of the first second, 19.6 m/s (approximately 20 m/s) at the end of the second second, 29.4 m/s (approximately 30 m/s) at the end of the third second

The term that best describes the landform "dip in a mountain range" is C. Syncline.

Syncline is a term to refer to a fold of the Earth's crust caused by the tectonic effects of the earth's dynamics. A synclinal fold is characterized by being a concave fold, that is, in the shape of a U.

According to the above, answers A, B and D are not correct options because they refer to different shapes of the Earth. Therefore, the landform shown is syncline.

Learn more at: https://brainly.com/question/17137827

Answer: C

Explanation: E2022

Answer:

The correct option is D

Explanation:

This question can be better understood when discussed using the Newton's first law of motion which states that an object would continue to move with a uniform speed (in a straight line) unless acted upon by an external force. What happens here (in the question) is that the bike rider would have continued moving at a constant speed (to the right) if not for the opposing force of the wind that acted against her (to the left). This wind/force would cause her speed to reduce or slow down (as posited by the law).

Answer:c 40kg

Explanation:

Answer:

B. 30 kg * m/s

Explanation:

college board answer

Hard glass is a type of glass characterized by its high resistance to thermal and mechanical stress. It is commonly used in scientific and industrial applications. The components of glass can be classified into formers, intermediates, and modifiers.

Hard glass, also known as borosilicate glass, is a type of glass that possesses high resistance to thermal expansion and mechanical stress. It is composed mainly of silica (SiO2) and boron oxide (B2O3), which act as formers in the glass structure. The formers provide the basic framework of the glass and contribute to its high durability and thermal stability.

In addition to formers, glass can also contain intermediates and modifiers. Intermediates, such as alumina (Al2O3) and magnesia (MgO), help in reducing the melting point of the glass and improve its workability during the manufacturing process. Modifiers, such as sodium oxide (Na2O) and calcium oxide (CaO), alter the properties of the glass, such as its refractive index and chemical resistance.

By combining the right proportions of these components, glassmakers can produce glass with specific characteristics suitable for various applications, ranging from laboratory equipment and optical lenses to household items and industrial containers.

Learn more about thermal here:

https://brainly.com/question/14506133

#SPJ11

A force known as friction prevents movement between two surfaces that are in touch. A static frictional force acts on an object when it is at rest on a surface and stops it from moving. An external force that is stronger than the static frictional force.

However, the frictional force switches from static to kinetic as soon as the item begins to move. Although it can do so when moving quickly or under a lot of stress, the coefficient of kinetic friction is typically lower than the coefficient of static friction. This implies that the amount of force needed to overcome friction may rise when the object moves faster or is subjected to more force.

To know more about static frictional , here

brainly.com/question/17237604

#SPJ1

In order to hit the monkey with the projectile, you need to Aim higher than the monkey's original position.

Projectile motion is the kind of motion in which an object or body is propelled in the air at an angle to the horizontal plane. The motion is caused by gravity and can be seen in many real-world situations. The path of the projectile is referred to as its trajectory.

The given problem is based on projectile motion. A toy monkey hangs from a hook a certain height above the ground. You fire a projectile at the same instant that the monkey drops and starts falling to the ground. In order to hit the monkey with the projectile, you need to aim higher than the monkey's original position. This is because, as the projectile moves toward the ground, it will fall under the influence of gravity. Hence, the projectile needs to be aimed at a higher point than the monkey's initial position.

Learn more about projectile at https://brainly.com/question/8104921

#SPJ11

Answer:

-5Gm^2/r

Explanation:

You don't have the graph, but I know what question you are talking about. The answer is above.

The new gravitational potential energy of the three-sphere system will  be\(- \frac{5Gm^2}{r}\).

The energy that an item has due to its location in a gravitational field is known as gravitational potential energy.

For the sphere 1 we have to perform no work. Hence, the work done is zero.

\(\rm W_1 = 0\)

The mass m is to be brought to be infinity. Because there is potential at B due to mass m at A point .

\(\rm W_2 = \frac{-Gm}{r} \times m \\\\ W_2 =-\frac{Gm^2}{r}\)

The B2 m at C is brought to infinity. For we have to do work . The  gravitational potential energy for the mass 2 m is;

\(\rm W_3 = \frac{-Gm}{r} \times 2m\\\\ W_3 = \frac{-4Gm^2}{y} \\\\\)

The new gravitational potential energy of the three-sphere system will be;

\(\rm W =W_1+W_2+W_3 \\\\\rm W =-0-\frac{Gm}{r}-4\frac{-Gm^2}{r^2} \\\\ W=\-\frac{-5Gm^2}{r^2}\)

Hence,  the new gravitational potential energy of the three-sphere system will  be\(- \frac{5Gm^2}{r}\).

To learn more about the gravitational potential energy, refer;

https://brainly.com/question/3884855

#SPJ2

Answer:

Approximately \(7.2\; {\rm m\cdot s^{-1}}\) (rounded up), assuming that this circle is vertical and \(g = 9.81\; {\rm m\cdot s^{-2}}\).

Explanation:

Let \(v\) denote the tangential speed of the ball, and let \(r\) denote the radius of the circle. Since the ball is in a circular motion, the acceleration on this ball would be equal to the centripetal acceleration \(a = (v^{2} / r)\). The net force on this ball would be \(F_{\text{net}} = m\, a = (m\, v^{2} / r)\).

The net force on this ball is also the vector sum of the tension \(T\) in the rope and the weight of the ball \(m\, g\):

\(F_{\text{net}} = (\text{weight}) + T\).

\(T = F_{\text{net}} - (\text{weight})\).

Note that:

\(\| T \| = \|F_{\text{net}} - (\text{weight})\| \le \|F_{\text{net}} \| + \| (\text{weight})\|\).

In other words, the magnitude of tension \(T\) is at most equal to \(\|F_{\text{net}} \| + \| (\text{weight})\| = (m\, v^{2} / r) + (m\, g)\), which happens when weight and net force are in opposite directions.

When the speed of the ball is maximized, the magnitude of tension \(T\) would be at the largest possible value of \(130\; {\rm N}\). Rearrange the equation and solve for speed \(v\):

\(\displaystyle \frac{m\, v^{2}}{r} + m\, g = \|T\|\).

\(\begin{aligned}v^{2} = \frac{r}{m}\, (\|T \| - m\, g) = \frac{r\, \|T\|}{m} - r\, g\end{aligned}\).

\(\begin{aligned}v &= \sqrt{\frac{r\, \|T\|}{m} - r\, g} \\ &= \sqrt{\frac{(1.2)\, (130)}{2.5} - (1.2)\, (9.81)}\; {\rm m\cdot s^{-1}} \\ &\approx 7.2\; {\rm m\cdot s^{-1}}\end{aligned}\).

The figure shows about the rotating earth.

To find the correct option among all the options, we need to know about the rotation state of earth.

Motion of earth about its own axis is known about its rotation motion.

In revolving and orbital motion, an object moves around an axis out side of that bulk of object in a certain orbit, while in rotational motion, the object moves around its own axis.

Rotation motion is represented by drawing an axis in the bulk of object and to indicate the rotation a circular arrow is drawn.

Thus, we can conclude that the figure shows about the rotating earth.

Learn more about rotation motion here:

brainly.com/question/20319147

#SPJ2

The magnitude of the centripetal acceleration of the car is 0.0314 m/s².

centripetal acceleration

Centripetal acceleration is described because the assets of the motion of an item, traversing a circular path. Any object that is shifting in a circle and has an acceleration vector pointed in the direction of the center of that circle is referred to as Centripetal acceleration.

a = v²/ r

r = 3500 m (SI unit)

t = 200 s

circumference = C

C = 2 * π * r

C = 2 * 3.141 * (3500 m)

C = 21987 m

v = D / t

v = (21987 m) / (200 s)

v = 109.935 m/s

a = (109.935 m/s)² / (3500 m)

a = (109.935 m/s²) / (3500 m)

a = 0.0314 m/s²

Learn more about centripetal acceleration here:-https://brainly.com/question/79801

#SPJ4

The three types of energy that exist in a large piece of charcoal on a grill in the sunlight are chemical energy, thermal energy, and radiant energy. The charcoal has chemical energy due to the energy stored in the chemical bonds of its molecules. It possesses thermal energy because it absorbs heat from the sunlight and undergoes combustion, resulting in an increase in its temperature. Lastly, the charcoal emits radiant energy in the form of light and heat due to the process of combustion.

1. Chemical Energy: The charcoal has chemical energy stored within it. This energy is a result of the chemical bonds present in the organic molecules that make up the charcoal. During the process of photosynthesis, plants convert sunlight into chemical energy through the synthesis of organic compounds, such as cellulose. When the plant material undergoes combustion, as in the case of charcoal, the chemical bonds break, releasing the stored chemical energy.

2. Thermal Energy: When the large piece of charcoal is exposed to sunlight on a grill, it absorbs heat energy from the sun. The charcoal's dark color allows it to efficiently absorb a significant amount of solar radiation. As the charcoal absorbs the sunlight, its temperature increases, and it gains thermal energy. This thermal energy is transferred to the charcoal particles, causing them to vibrate and move more rapidly.

3. Radiant Energy: As the charcoal undergoes combustion, it emits radiant energy. Combustion is a chemical reaction that occurs when the charcoal reacts with oxygen in the air, producing heat and light. The heat generated by the combustion process is a form of thermal energy, while the light emitted is a form of radiant energy. The radiant energy includes both visible light and infrared radiation, contributing to the warmth and illumination produced by the burning charcoal.

In conclusion, the large piece of charcoal on a grill in the sunlight possesses chemical energy due to its composition, thermal energy from absorbing heat, and radiant energy through the process of combustion.

For more such questions on chemical energy, click on:

https://brainly.com/question/5650115

#SPJ8