Option B i.e The Olympic bicycle racer who goes faster when is racing against a person rather than a clock.
As the social facilitation refers to the improvement of performance produced by the presence of others, The Olympic bicycle racer who goes faster when is racing against a person rather than a clock is the best example of social facilitation.
The tennis player who is frustrated when the crowd yells at her is not an example of social facilitation. Though there are presence of people, but their yell at her frustrated her which would worsen her performance.
Answer:
The correct answer is option B, The Olympic bicycle racer who goes faster when he is racing against a person rather than the clock
Explanation:
In social facilitation, a person works/performs better than his/her normal work/performance as he/she is in presence of other people. There are basically two type of social facilitation –
a) co-action effects – when a person works with other person as a co-worker
b) audience effect – when a person works in the mere presence of another person.
In this case , an Olympic racer competes with another racer, thus this would be a co –action effect.
In a compression or longitudinal wave, the _____________is a point on a medium through which a longitudinal wave is traveling that has the maximum density.
it is a. compression
The diagram shows a charge moving into an electric field. The charge will most likely leave the electric field near which letter?
Answer:
Y
Explanation:
next to Y
What total distance will a sound wave travel in air in 3.00 seconds at stp?
A car drives over a hilltop that has a radius of curvature 120 m at the top of the hill. at what speed would the car be traveling when it tires just barely lose contact with the road when the car is at the top of the hill?
The car would be traveling about 122 km/h when its tires just barely lose contact with the road at the top of a hill with a radius of curvature of 120 m.
Explanation:This problem can be solved by using the concept of centripetal force. When the car's tires barely lose contact with the road, the only force acting on it will be the gravitational force. This gravitational force, or the weight of the car, must provide the required centripetal force for the car to stay in circular motion. Hence, we equate centripetal force to the gravitational force. This sets up the equation mg = mv²/r, where m is the mass of the car, g is the acceleration due to gravity, v is the velocity, and r is the radius. Notice that the mass of the car cancels out.
Solving this equation, we calculate the velocity v as √(g×r) = √(9.8×120) ≈ 34 m/s, which is about 122 km/h. Please note that the given figure of 165 km/h seems inconsistent with the radius provided in the question and commonly accepted value for gravity. However, for a steeper curve or a higher banking angle, the speed at which the car loses contact with the road could indeed be higher.
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Which is the best example of a cycle: a turn of a wheel or a slide down a ski slope?
Final answer:
The best example of a cycle is a turn of a wheel, as it involves a repetitive motion that returns to its starting point, unlike a slide down a ski slope which is a linear motion.
Explanation:
When discussing the concept of a cycle, a turn of a wheel is the best example, as it involves a repetitive motion that returns to its starting point. As the wheel turns, each point on its circumference moves in a circular motion and eventually comes back to where it began, completing one cycle. This represents a continuous, recurring sequence over time and is often depicted in physics and other sciences when explaining rotational motions.
In contrast, a slide down a ski slope is a linear motion that does not inherently return to its starting point, thus not forming a cycle. While one may cycle up and down the slope repeatedly, the slide itself is not cyclical.
For instance, Bug B on a spinning wheel demonstrates this concept of a cycle perfectly as it continuously moves in a circle.
Sonar equipment sends sound wastes into deep water and measures what
Find the amount of work done in vertically lifting a steel beam of mass 600. kg at uniform speed through a distance of 38.0 m.
From the calculations, we can see that the work done in the gravitational field is 228000J
What is work done?The work done in a gravitational field depends on the height of the body hence we have;
Work done = mgh
m = 600 kg
g = 10 m/s^2
h = 38 m
Hence
W = 600 kg * 10 m/s^2 * 38 m = 228000J
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Researchers have found that the ________ lobes of the brain are more active when we experience positive emotions, while the ________ lobes of the brain are more active when we experience negative emotions.
The frontal lobes of the brain are more active with positive emotions, and the right hemisphere is more active with negative emotions, reflecting their respective roles in emotional processing.
Explanation:Researchers have found that the frontal lobes of the brain are more active when we experience positive emotions, while the right hemisphere is more active when we experience negative emotions. The frontal lobe, involved in reasoning, motor control, emotion, and language, has been linked to the processing of positive emotions and is located in the forward part of the brain, extending back to a central sulcus. In contrast, the right hemisphere is associated with arousal and negative emotions, suggesting a lateralization effect in emotional processing.
When you drop a stone into a pool water waves spread out from where the stone landed. why answers?
Which type of mirror has a flat surface?
Do other planets aside from Saturn have rings?
What is the potential energy of a 0.5 kg object sitting on a shelf that is 1.5 meters high?
Answer:
what is the potential energy of a 5 kg apple that is sitting on a 1.5 m high tree branch
Explanation:
Which kind of star is most likely to spend the longest time on the main sequence?
A.) A low-mass red star
B.)A yellow star like
the sun
C.) a high-mass blue star
D.) a bright white star
Answer: 1. c . Nebula
2. a. low mass red star
3. d. turn into white dwarfs
4. c. 10 billion years
Explanation:
A block of mass m = 4.4 kg slides from left to right across a frictionless surface with a speed 9.2 m/s It collides in a perfectly elastic collision with a second block of mass M that is at rest. After the collision, the 4.4-kg block reverses direction, and its new speed is 2.5 m/s What is V, the speed of the second block after the collision?
A)6.4 m/s
B)5.1 m/s
C)5.9 m/s
D)7.2 m/s
Answer:
option (A)
Explanation:
m = 4.4 kg, u = 9.2 m/s, v = - 2.5 m/s
M =
U = 0
V = ?
By use of conservation of momentum
mu + M x 0 = mv + MV
4.4 x 9.2 + 0 = 4.4 x (- 2.5) + M x V
40.48 + 11 = M V
MV = 51.48 ......(1)
By using the conservation of kinetic energy
0.5 x m x u^2 + 0 = 0.5 x m v^2 + 0.5 x M V^2
4.4 x 9.2 x 9.2 = 4.4 x 2.5 x 2.5 + MV^2
372.416 - 27.5 = MV^2
MV^2 = 344.9 ...... (2)
Dividing equation (2) by equation (1)
V = 6.7 m/s
So, the correct option is (A)
Using conservation of momentum and kinetic energy, we calculate that the speed of the second block after the collision is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.
Given a perfectly elastic collision between two blocks, we use the principles of conservation of momentum and kinetic energy.
Step-by-Step Solution:
Calculate the initial momentum:Using these steps, we calculate that the speed of the second block after the collision, V, is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.
Which half reaction shows both the conservation of mass and the conservation of charge?
How is refraction different from reflection?
A. Refraction occurs only within the same medium
B. The light travels at the same speed as before it was
C. The angle of refraction is measured from the flat surface rather than from the normal
D. The angle of refraction is not necessarily equal to the angle of incidence
The refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.
What is refraction?Refraction is defined as the shift in a wave's direction when it travels from one medium to another.
Although light refraction is one of the most frequently seen phenomena, refraction can also occur with sound and water waves. We can use optical tools like lenses, prisms, and magnifying glasses thanks to refraction. We can focus light on our retina because of the refraction of light, which is another benefit.
What is reflection?Reflection is the phenomenon of light rays returning to the source after striking an obstruction. It resembles the way a ball bounces when we toss it on a hard surface.
Some of the light rays that strike an object are reflected, some of them travel through it, and the remainder are absorbed by the object.
Mirrors are objects that completely reflect all light rays that strike them. Mirrors therefore demonstrate the phenomenon of light reflection.
Hence, the refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.
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What is the frequency corresponding to a period of 4.31 s? answer in units of hz?
The frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz, calculated using the formula for frequency and period (f = 1/T).
Explanation:The subject of this query is on the concept of frequency in relation to period, which is a topic studied in Physics. The relationship between frequency (f) and period (T) is given by the equation f = 1/T. In this context, the given period T is 4.31 seconds.
Applying this to the equation results in f = 1/4.31 Hz. Therefore, the frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz.
The SI unit for both frequency and period are inverse to each other-- with frequency being in Hertz (Hz), defined as oscillations per second, and period being in seconds, defined as the time for one complete cycle of oscillation.
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________ describes the unique sound quality or tone color of a sound.
What is the kinetic energy of a 72.0-kg sky diver falling at a terminal velocity of 79.0 m/s? show your work. round your answer to the thousands place and include the units with your answer?
Final answer:
The final kinetic energy of the 72.0-kg skydiver falling at a terminal velocity of 79.0 m/s is 226,584 Joules, rounded to the thousands place as 227,000 Joules.
Explanation:
Kinetic energy (KE) can be calculated using the formula KE = 1/2 × mass × velocity^2. In this case, the mass (m) is 72.0 kg and the velocity (v) is 79.0 m/s. Plugging these values into the formula yields KE = 1/2 × 72.0 kg × (79.0 m/s)^2, which calculates to approximately 226,584 Joules. As instructed, rounded to the nearest thousand, the kinetic energy is given as 227,000 Joules, including the units which are crucial for expressing energy. This demonstrates the considerable amount of energy a body can have due to its motion, and emphasizes the importance of accurate calculations when dealing with physical quantities like kinetic energy.
Bettina spoke into a microphone during the school play to increase the sound of her voice so the audience could hear her speak. The loudness of Bettina’s voice was changed by what type of energy?
C.) Electric Energy
When you look at yourself in a pocket mirror and then hold the mirror farther away, you see less of yourself more of yourself the same of yourself?
Serena is a research student who has conducted an experiment on the discoloration of marble. Read about Serena’s experiment. Then identify two flaws in her experiment’s design.Serena sees an article about the Taj Mahal, a medieval marble monument in India. She reads that the white monument is beginning to turn a dull yellow-brown. Serena admires the Taj Mahal and is eager to learn what might be causing the yellowing. She formulates a hypothesis that the yellow-brown tinge may be caused by air pollution from black carbon, brown carbon, or methane, combined with wind erosion.To test her hypothesis, she decides to study the effects of these air pollutants and wind on white marble. She finds three identical pieces of white marble and exposes one of them to air containing black carbon, one to air with brown carbon, and one to air with methane. She also places a fan on two of the samples, varying the speed of the air stream in regular intervals. After a few days, the marble samples begin changing color, becoming grayish. Serena learns that air pollution caused the discoloration. However, she is not sure how it became gray instead of yellow and what exactly caused the discoloration.
Serena's experiment has flaws including the absence of a control group and the failure to isolate variables, which makes it difficult to determine the exact cause of the marble discoloration.
Two flaws in Serena's experiment design:
Lack of Control Group: Serena should have had a control group of white marble exposed to clean air to compare the discoloration caused by pollutants accurately.
Insufficient Variables: Serena only considered air pollutants and wind speed as factors, neglecting other variables like humidity, temperature, or types of pollutants.
Two flaws in Serena's experiment design are evident: the lack of a control group and the lack of variable isolation. A control group is necessary to compare changes in marble coloration without any exposure to pollutants. Without this, it is impossible to ascertain if the discoloration is solely due to the pollutant exposure or if there are other environmental factors at play.
Furthermore, Serena exposed some marble samples to both air pollutants and varying wind speeds without having a sample with a constant wind speed. This means that the specific effects of each air pollutant could not be isolated, as the wind variation could have contributed to the discoloration. For a better understanding of the pollutants' effects, each variable (pollutant and wind speed) should be tested independently.
The periodic table lists all the compounds on Earth.
True or False?
The maximum gauge pressure in a hydraulic lift is 18.0 atm what is the largest size vehicle
The maximum gauge pressure in a hydraulic lift is 18.0 atm, the largest size vehicle (in terms of weight) that the hydraulic lift can lift is approximately 112,336.84 kg.
We must weigh the weight of the vehicle and the pressure imposed by the lift to find the largest size vehicle that can be lifted by a hydraulic lift with a maximum gauge pressure of 18.0 atm.
r = d / 2
r = 28.0 cm / 2
r = 14.0 cm
r = 0.14 m
A = π *[tex]r^2[/tex]
A = π * [tex](0.14 m)^2[/tex]
A ≈ 0.0616 [tex]m^2[/tex]
1 atm = 101,325 Pa
18.0 atm = 18.0 * 101,325 Pa
≈ 1,823,850 Pa
Substituting the values into the formula:
Force = (1,823,850) * (0.0616) ≈ 112,336.84 N
Now, we can calculate the weight (W) of the largest vehicle that can be lifted using the formula:
Weight = Force
Thus, the largest size vehicle (in terms of weight) that the hydraulic lift can lift is 112,336.84 kg.
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Your question seems incomplete, the probable complete question is:
The maximum gauge pressure in a hydraulic lift is 18.0 atm what is the largest size vehicle "What is the largest size vehicle (kg) it can lift if the diameter of the output line is 28.0 cm? "
What is the force on an electron in a CRT when it’s moving at 2.5 × 105 meters/second perpendicular to a magnetic field of 1.5 teslas? The charge for an electron is -1.6 × 10-19 coulombs.
The force on an electron moving perpendicular to a magnetic field of 1.5 teslas at 2.5 × 10⁵ meters/second is calculated to be -6.0 × 10⁻¹⁴ newtons, using the formula F = qvB.
Explanation:The force on an electron moving perpendicular to a magnetic field can be calculated using the Lorentz force equation, which states that the magnetic force (F) exerted on a moving charge in a magnetic field is the product of the charge (q), its velocity (v), and the magnetic field strength (B), and is given by F = qvB when the velocity is perpendicular to the magnetic field. In this case, the electron has a charge of -1.6 × 10-19 coulombs, is moving at a velocity of 2.5 × 105 meters/second, and the magnetic field strength is 1.5 teslas.
Therefore, to calculate the force on the electron:
F = qvBF = (-1.6 × 10-19 C)(2.5 × 105 m/s)(1.5 T)F = -6.0 × 10-14 newtonsNote that the negative sign indicates the force direction according to Fleming's left-hand rule, opposite to the conventional current direction.
Using the Lorentz force equation, the force on an electron moving at 2.5 x 10^5 m/s perpendicular to a 1.5 T magnetic field with a charge of -1.6 x 10^-19 C is calculated to be -6.0 x 10^-14 N. The negative sign represents the direction opposite to the magnetic field.
Explanation:The force on an electron in a CRT (Cathode-Ray Tube) when it's moving perpendicular to a magnetic field can be determined by using the Lorentz force equation for magnetic force, which is F = qvBsin(\u03b8), where F is the force, q is the charge, v is the velocity of the particle, B is the magnetic field strength, and \u03b8 is the angle between the velocity and the magnetic field. In this case, the electron is moving perpendicular to the field, so \u03b8 = 90 degrees, and sin(90) = 1. Substituting the given values:
F = (-1.6 \u00d7 10^{-19} C)(2.5 \u00d7 10^{5} m/s)(1.5 T)
Since sin(90) = 1, the equation simplifies to:
F = (-1.6 \u00d7 10^{-19} C)(2.5 \u00d7 10^{5} m/s)(1.5 T)
After calculating, the magnetic force acting on the electron is:
F = -6.0 \u00d7 10^{-14} N
The negative sign indicates the direction of the force is opposite to the direction of the magnetic field, following Fleming's left-hand rule for the direction of magnetic force on a moving charge.
"In this lesson, you learned about renewable energy resources and nonrenewable energy resources. Think about the resources discussed in this lesson and select the one that you think is the most effective in all ways. Think about the financial impact, the ability to be renewed, and the effectiveness of the energy that is produced. Write a paragraph describing why the resource you have selected is the most efficient."
I'm thinking wind energy, what else should be in this paragraph?
A 1.00 kg object is attached to a horizontal spring. the spring is initially stretched by 0.500 m, and the object is released from rest there. it proceeds to move without friction. the next time the speed of the object is zero is 0.100 s later. what is the maximum speed of the object?
The maximum speed of the object is 15.70 m/s
Given data:
The mass of object attached to horizontal spring is, m = 1.00 kg.
The stretching distance is, x = 0.500 m.
Time interval is, t = 0.100 s.
The linear velocity of spring - mass system is given as,
[tex]v = x \times \omega[/tex]
Here, [tex]\omega[/tex] is an angular speed. Solving as,
[tex]v = x \times (2 \pi f )\\\\v = x \times (\dfrac{2 \pi}{T} )[/tex]
Time period (T) for complete oscillation is, [tex]T = 2t[/tex].
[tex]v = x \times (\dfrac{2 \pi}{ 2 t} )\\v = 0.500 \times (\dfrac{ \pi}{0.100} )\\v =15.70 \;\rm m/s[/tex]
Thus, the maximum speed of the object is 15.70 m/s.
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What can you do with the Freudian tools for analysis? You can decode the manifest content in your dreams. You can scrutinize a person's fears. You can protect latent content. You can figure out the non-projected dream content.
The answer is : you can decode the manifest content in your dreams.
Which element has a full valence shell of electrons
Helium , Neon , argon, xenon and radon all are noble gases and have full valence shell of electron
What are noble gases ?The noble gases (Group 18) are located in the far right of the periodic table and were previously referred to as the "inert gases" due to the fact that their filled valence shells (octets) make them extremely nonreactive.
The 18th group in the modern periodic table is of noble gases, because their outer most shell is completely filled as it have 8 electrons in the outermost shell , except helium which have 2 electrons in outermost shell ( He have only one shell )
Helium , Neon , argon, xenon and radon all are noble gases and have full valence shell of electron
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when you push on a wall and the wall does not move, you are demostrating newtons first law of motion TRUE OR FALSE