Haley's swim team hosted a home meet and needed volunteers. How did she reveal to her coach that she is not a team player?
Offered to be a timer for other race events
Stayed after the meet to clean up
Left the meet after her events were over
Encouraged other teammates after their races
C: Left Meet after her events were over
What does the atomic mass tell you about an element?
The atomic mass of an element provides crucial information about the element, including its identity, its reactions with other elements and its behavior. It is determined by the total number of protons and neutrons. It can give you an idea about the size and weight of an atom.
Explanation:The atomic mass of an element is determined by the total number of protons and neutrons in an atom's nucleus. It provides crucial information about the element, including its identity, how it reacts with other elements and its behavior. For example, hydrogen has an atomic mass of 1 because it has one proton and no neutrons. On the other hand, helium has an atomic mass of 4, because it has two protons and two neutrons. Therefore, the atomic mass can give you an idea of the size and weight of an atom.
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URGENT DUE IN HALF AN HOUR:
You are in the middle of a large field. You walk in a straight line for 100m, then turn left and walk 100m more in start line before stopping. When you stop, you are 100m from the starting point.By how many degrees did you turn?
A) 90
B) 120
C) 30
D) 180
E) This is impossible.You cannot walk 200m and be the only 100m away from where you started.
Draw a distance over time graph of a dog that is tied to a 4 foot rope and travels in 1 complete circle
The graph representing a dog's displacement tied to a rope moving in a circle would be a sinusoidal wave, which fluctuates between a minimum and a maximum distance based on the dog's position in the circle. This pattern repeats each time the dog completes a full circle. The graph assumes a constant speed of the dog.
Explanation:The distance over time graph of a dog tied to a 4-foot rope traveling in a complete circle would essentially be a sinusoidal wave that repeats its pattern in the time it takes the dog to complete one circle. The reason for this wave-like pattern is that the dog's distance from a given point (like the post the rope is tied to) increases then decreases in a regular pattern as it moves in a circle.
Consider the initiation point to be when the dog is closest to the post. As the dog moves in its circle, the distance increases achieving maximum when it is farthest from the point. Then, as it continues to move, the distance decreases until it comes back to the starting point. This creates a cycle which repeats for each complete circle the dog travels, creating a sinusoidal pattern.
It's important to note that this expected graph assumes a constant speed of the dog. If the dog alters its pace then the shape of the graph would also vary correspondingly.
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How does temperature affect water potential?
Temperature affect water potential. Water will diffuse down gradients of water potential, just as heat will flow down gradients of temperature and rocks will roll down gradients of gravitational potential.
What is gravitational potential?Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s².
The potential energy of water per unit volume in comparison to pure water under reference conditions is known as water potential. The tendency of water to migrate from one place to another due to osmosis, gravity, mechanical pressure, and matrix effects like capillary action is measured by water potential.
Temperature affect water potential. Water will diffuse down gradients of water potential, just as heat will flow down gradients of temperature and rocks will roll down gradients of gravitational potential.
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The ionosphere is a layer of the atmosphere located inside the _____.
Answer:
The ionosphere is a layer of the atmosphere located inside the Thermosphere.
Explanation:
Ionosphere: It is an upper layer present in the atmosphere,which has different ionized layers through which electricity is conducted. It is present within the thermosphere.
The ionosphere has three layers:
1.F layer
2.E layer
3.D layer
A 55 kg baseball player slides into third base with an intial speed of 4.6 m/s.if the coefficient of kinetic friction between the player and the ground is 0.46, what is the player's acceleration?
The baseball player's acceleration, considering the coefficient of kinetic friction and his mass, is roughly -4.5 m/s². The negative sign indicates a deceleration due to friction.
Explanation:This is a problem involving Physics, specifically the concept of friction and acceleration. Here, we have a baseball player, with a mass of 55 kg, sliding into third base. The coefficient of kinetic friction between the player and the ground is stated to be 0.46. We'll use these values to calculate the player's acceleration.
The equation representing the force due to friction (Ff) is μmg, where μ is the coefficient of friction, m is mass and g is gravity (9.8 m/s²). Here, we insert the given values and find Ff to be approximately 247.34 N. Since Ff = ma (force is mass times acceleration), we can find the acceleration by rearranging to a = Ff/m. Inserting our values, we find the acceleration to be approximately -4.5 m/s².
The negative sign denotes that this is a deceleration force, as expected since the friction slows down the player.
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If you notice that two waves combine and a part of the resulting wave has less light intensity than either of the individual waves, you're observing A. destructive interference. B. polarization. C. constructive interference. D. diffraction.
If you notice that two waves combine and a part of the resulting wave has less light intensity than either of the individual waves, you're observing destructive interference.
discuss the changes in potential energy and kinetic energy and total energy for skateboarder going up and down on a half pipe ramp
In regards to basic motion, the total energy is simply the sum of potential energy and kinetic energy. Potential energy is dependent with position.
Going up:
Potential energy increases, Kinetic energy decreases, Total energy is constant
Going down:
Potential energy decreases, Kinetic energy increases, Total energy is constant
It's actually 175 J for the answered you got from ingenuity so i hope this helps
What motivates the squire in lines 85- 90?
Theodore Maiman demonstrated the first working laser in 1960. At that time, scientists didn't really know what they were going to use the lasers for, but since then, there have been many new products developed that rely on laser technology.
In which of the following products are lasers used?
I.
CD players
II.
barcode scanners
III.
hair removal
IV.
medical surgery
Answer:
i, ii, iii and iv
Explanation:
Lasers are optical devices used to produce beam of light by the stimulated emission of radiation. As a matter of fact, Laser is the short form for "Light amplification by stimulated emission of radiation". Lasers can be used in various applications such as;
i. laser printers
ii. fiber optic and free-space optical communication
iii. medical surgery and
iv. treatments of skin
v. barcode scanners
vi. hair removal from face, leg, arm and other areas
vii. optical disk drives e.g in CD players
The ____________ zone extends to a maximum depth of 200 meters below the surface of the water.
Kerosene was commonly used in lamps because it burns easily.
Answer:
This is a chemical property
Explanation:
On EDG
What are the principal differences between a radio wave and light? between light and an x-ray?
An athlete jumping vertically on a trampoline leaves the surface with a velocity of 8.5 m/s upward. what maximum height does she reach?
calculate the kinetic energy of a car with a mass of 500kg traveling at a velocity of 10m/s^2 north. A) 2,500j B) 25,000j C) 50,000j D) 100j
The kinetic energy of a 500 kg car traveling at 10 m/s is calculated using the formula KE = 0.5 × m × v², resulting in 25,000 J, which corresponds to option B.
Explanation:To calculate the kinetic energy (KE) of a car, we can use the formula KE = 0.5 × m × v², where 'm' is the mass of the car and 'v' is its velocity. In this case, the car has a mass (m) of 500 kg and a velocity (v) of 10 m/s (note that the unit m/s² is typically used for acceleration, but here it's clear that velocity is intended).
Substituting the given values into the equation, we get KE = 0.5 × 500 kg × (10 m/s)² = 0.5 × 500 × 100 = 25000 J. Therefore, the kinetic energy of the car is 25,000 joules (J), which corresponds to option B).
what conditions in the nucleus are likely to result in an atom undergoing radioactive decay
How do we feel texture?
What does a negative moment of inertia mean?
To solve this we must be knowing each and every concept related to moment of inertia and its calculations. Therefore, moment of inertia mean of an object can not be negative. A negative moment of inertia has no significance.
What is moment of inertia?Moment of inertia, also known as angular mass and rotational inertia, is a number that determines the amount of torque necessary for a specific angular acceleration or even a quality of a body that opposes angular acceleration.
No. The inertia moment is defined as the product of mass, time, and distance to the rotational axis squared. The combination is always positive since mass has always been positive and the squares of any real integer is always positive.
Therefore, moment of inertia mean of an object can not be negative. A negative moment of inertia has no significance.
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In classical mechanics, it typically refers to a system or object that, under these conditions, displays aberrant behaviour or characteristics at conflict with classical mechanics.
Moment of inertia is a characteristic used in classical mechanics to measure an object's resistance to circular motion. It always has a positive value or zero, denoting how mass is distributed along a rotational axis.
However, the idea of a negative moment of inertia might occur in some complex mathematical situations or in specialised domains like quantum mechanics.
Thus, it usually denotes a system or item under these circumstances that exhibits anomalous behaviour or features that are at odds with classical mechanics.
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Why is the slope of position vs time squared 1/2a?
You throw a ball straight up into the air at a speed of 15 m/s. You want to know how high above your hand the ball will be at exactly 2.5 sec after you released it.
A bug flies at a velocity of 0.75 m/s into an oncoming breeze blowing at 0.25 m/s. What is the resultant velocity of the bug?
A 0.0 M/S
B0/25 M/S
C 0.50 M/S
D 1.0 M/S
Find the weight of the same object on a planet where the gravitational attraction has been reduced to 1/10 of the earth’s pull.
Final answer:
To find the weight of an object on another planet with 1/10th of Earth's gravity, multiply the mass by the reduced gravitational force (0.98 m/s²) giving a weight of 0.98 N for a 1.0-kg object.
Explanation:
The weight of an object on another planet where gravitational attraction is reduced to 1/10 of Earth's can be calculated by adjusting the gravitational force. On Earth, the acceleration due to gravity, g, is 9.80 m/s², and the weight w of a 1.0-kg object is thus 9.8 N calculated by w = m * g. If the gravitational pull is 1/10th that of Earth's, the acceleration due to gravity on this new planet would be 0.98 m/s². Therefore, the weight of a 1.0-kg object on this planet would be:
w = m * g
= (1.0 kg) * (0.98 m/s²)
= 0.98 N.
So, an object that weighs 9.8 N on Earth would weigh just 0.98 N on a planet where gravity is 1/10 as strong.
A man drops a stone into a water well on his farm. He hears the sound of the splash 4.26s later. How deep is the well? The acceleration due to gravity is 9.8m/s^2 and the speed of sound in air is 313m/s. Answer in units of m
First let us calculate the time required for the stone to drop, say t1.
We use the formula:
h = vi t1 + 0.5 g t1^2
where h is height, vi is initial velocity = 0
h = 4.9 t1^2
Then the time required for the sound to go up, say t2:
h = 313 t2 – 4.9 t2^2
The two heights are equal so equate:
4.9 t1^2 = 313 t2 – 4.9 t2^2
We know that:
t1 + t2 = 4.26
so,
t1 = t2 – 4.26
Therefore:
4.9 (t2 – 4.26)^2 + 4.9 t2^2 – 313 t2 = 0
4.9 (t2^2 – 8.52 t2 + 18.1476) + 4.9 t2^2 – 313 t2 = 0
4.9 t2^2 – 41.748 t2 + 88.92324 + 4.9 t2^2 – 313 t2 = 0
9.8 t2^2 – 354.748 t2 = -88.92324
t2^2 – 36.2 t2 = -9.0738
Completing the square:
(t2 – 18.1)^2 = -9.0738 + 327.61
t2 – 18.1 = ± 17.85
t2 = 0.25s, 35.95
t2 cannot be greater than 4.26 s, therefore correct one is:
t2 = 0.25 s
Therefore height of the well is:
h = 313 t2 – 4.9 t2^2
h = 313 * 0.25 – 4.9 * 0.25^2
h = 77.94 m = 78m
Final answer:
The depth of the well is approximately 91.164 m neglecting the time for sound to travel up the well, and approximately 364.656 m taking into account the time for sound to travel up.
Explanation:
To calculate the depth of the well, we can use the equation: height = (1/2) * g * t2, where g is the acceleration due to gravity and t is the time it takes for the sound to travel back. Since the sound takes 4.26s to return, the formula becomes: height = (1/2) * 9.8 * (4.26)2. Solving this equation gives us the depth of the well as approximately 91.164 m.
Taking into account the time for sound to travel up the well, we need to consider the time it takes for the sound to travel down and then up again. The total time for the sound to travel down and back up is twice the time for the sound to travel down. So, the formula becomes: height = (1/2) * 9.8 * (2 * 4.26)2. Solving this equation gives us the depth of the well as approximately 364.656 m.
What is the relationship between wavelength and frequency? is it direct or inverse?
Answer:
inverse
Explanation:
If a mack truck and a minicooper have a head-on collision, which vehicle will experience the greater force of impact? the greater impulse? the greater change in momentum? the greater deceleration?
The Mack truck has the higher force of impact, Mini cooper has the greater impulse, greater change in momentum occurs in Mini cooper, and the Mack truck has greater deceleration.
A characteristic of a moving body that it possesses due to its mass and motion and is equal to the sum of its mass and speed. Momentum is a vector quantity, which means it has magnitude with direction.
Due to its size and higher center of gravity, the Mack truck would impact with a larger force. Since a tiny cooper is lighter and smaller than a Mack truck, it would have a higher impulse. Due to its lesser weight and the fact that the Mack truck's impact would exert more force on it, the mini cooper would also experience a bigger change in momentum.
Due to its greater weight and longer slow down time, the Mack truck would experience a greater deceleration.
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from an origin you walk 3 meters east 7 meters west and then 6meters east . where are you now relative to the origin?
Swamps differ from marshes in that swamps _____.
(A) Are rich in waterfowl
(B) Are dominated by grasses and rushes
(C) Have acidic soil
(D) Are dominated by trees and shrubs
Final answer:
Swamps are notably different from marshes due to the dominance of trees and shrubs in their ecosystem. (Option D)
Explanation:
Swamps differ from marshes in that swamps are dominated by trees and shrubs. While marshes are typically characterized by their grass and rush-dominated vegetation, swamps distinguish themselves with a more wooded environment. This means that a swamp's ecosystem typically revolves around a dense canopy formed by trees and shrubs, providing a unique ecological habitat.
Furthermore, this habitat often boasts slow water flow, just like marshes, yet it features a different array of plant and animal life thanks to the domination of woody plants. This distinction in vegetation composition between swamps and marshes contributes to the diverse ecological niches and biodiversity within these wetland ecosystems, reflecting the adaptability of flora and fauna to their specific habitat structures.
A pear hangs in a tree at a height of 1.8 m. The pear has a mass of 0.2 kg. The pear falls out of the tree and lands on the ground.
1. How much kinetic energy does the pear have when it reaches the ground?
2. How fast is the pear moving when it hits the ground?
Final answer:
The pear has a kinetic energy of 3.528 J just before it hits the ground, and it is traveling at a velocity of about 5.94 m/s at that moment.
Explanation:
To answer the two questions, we can use the principles of energy conservation and kinematics. When the pear falls, its gravitational potential energy is converted into kinetic energy.
1. Kinetic Energy of the Pear When it Reaches the Ground:: The gravitational potential energy (PE) of the pear at the height of 1.8 m is given by PE = mgh, where m is the mass, g is the acceleration due to gravity (9.8 m/s2), and h is the height. For the pear with a mass of 0.2 kg, the potential energy is PE = 0.2 kg * 9.8 m/s2 * 1.8 m = 3.528 J. Assuming there is no energy loss, this potential energy is entirely converted to kinetic energy (KE) just before the pear hits the ground.
2. Velocity of the Pear When it Hits the Ground:: The formula for kinetic energy is KE = ½mv2, where m is the mass and v is the velocity. We can rearrange this to solve for v, giving us v = √(2KE/m). Substituting the values we have, the velocity is v = √(2*3.528 J / 0.2 kg) = √(35.28 m2/s2) = 5.94 m/s (approximately). Therefore, just before impact, the pear is moving at a velocity of about 5.94 m/s.
Which of the following statements about entrepreneurs in the U.S. is correct?
Select the best answer from the choices provided.
New category-killer stores like Home Depot and Barnes and Noble provide entrepreneurs with help and ideas.
Lobbying by businesses helps create free-market incentives that help entrepreneurs.
Many professionals, such as doctors, hair dressers, and programmers, work as entrepreneurs in their own businesses.
All of the answers are correct.
NextReset
The correct statement is that various professionals like doctors and programmers often engage in entrepreneurship in the U.S., contributing to a diverse and innovative economy. Entrepreneurs are essential to developing new technologies and services, enhancing competition, and driving wealth creation within the free enterprise system.
Explanation:The correct statement about entrepreneurs in the U.S. is that many professionals, such as doctors, hairdressers, and programmers, work as entrepreneurs in their own businesses. These individuals utilize their skills and expertise to start and manage their ventures, contributing to a dynamic and diverse economy.
Entrepreneurs are not just limited to starting new ventures; they are also pivotal in introducing innovative technologies and improvements that enhance productivity and efficiency within various industries. They are often motivated by the potential for monetary success and the opportunity to introduce superior products or services to the market. Competition resulting from entrepreneurial endeavors can lead to better quality products at lower prices for consumers.
In the U.S. free enterprise system, entrepreneurs enjoy individual freedom to develop their ideas, which leads to a varied marketplace with responsive pricing and investment opportunities. This fosters the creation of wealth not only for the entrepreneurs themselves but also for the broader economy through job creation and tax revenues.