Answer:
1) the bird sitting on the tree is not moving, hence he has not kinetic energy. By the fact that the bird is high in the tree you can see that it has some potential energy (wich in this case depends on the height) and the bird has potential energy because has the ability of doing work (lije jumping down for example)
2) the cook is moving, because he needs to do it in order to prepare the meal, then he has kinetic energy and is doing work (because he puts the energy in order to move himself) the answer is "kinetic energy because he is making the meal.
3) Ok, when you stretch the bow, it wants to return to his original shape, then you are creating elastical energy in the bow, and you are using mechanical energy to stretch the bow. Then when the bow releases his elastical energy (also you can think that when the string is pushing the arrow, it is applying mechanical energy on the arrow), it propulsates the arrow, creating now kinetic energy into the arrow.
The correct answer is mechanical to elastic, because you need to first use mechanical energy in order to stretch the bow and create the elastic energy, and then mechanical again when the string starts to impulse the arrow.
The train speeds passed Holly at 70 km/h north ward. This spider crawls past lukes foot in the same direction at 30 m/h. What is the velocity of the spider relative to Holly?
which of the materials would be able to scratch Quartz
Wo particles are separated by a certain distance. the force of gravitational interaction between them is f0. now the separation between the particles is tripled. find the new force of gravitational interaction f1.
If I drop a watermelon from the top of one of the tower dorms at CSU, and it takes 3.34 seconds to hit the ground, calculate how tall the building is in meters
A copper ball and an aluminum ball of mass 150 g each are heated to 100°C and then cooled to a temperature of 20°C. The heat lost by the copper ball is 4.6 kJ. The heat lost by the aluminum ball is 10.8 kJ. What is the specific heat of copper, if the specific heat of aluminum is 0.90 J/g°C?
The specific heat of aluminum is actually simply a diversion. Because we can directly compute for the specific heat of copper using the formula:
ΔH = m C ΔT
where ΔH is change in enthalpy or heat lost, m is mass, C is specific heat and ΔT is change in temp
4,600 J = 150 g * C * (100 °C - 20°C)
C = 0.38 J/g°C
Answer:
0.383 J/g°C
Explanation:
The heat emitted by the copper ball while cooling down is given by:
[tex]Q=m C_s \Delta T[/tex]
where:
m = 150 g is the mass of the ball
Cs = ? is the specific heat of copper
[tex]\Delta T=100^{\circ}C-20^{\circ}C=80^{\circ}C[/tex] is the change in temperature
We know that the heat lost by the copper ball is
[tex]Q=4.6 kJ=4600 J[/tex]
So we can re-arrange the formula to find the specific heat capacity:
[tex]C_s = \frac{Q}{m \Delta T}=\frac{4600 J}{(150 g)(80^{\circ} C)}=0.383 J/g^{\circ}C[/tex]
The wavelength of a wave is the wavelength of a wave is how strong the wave is. equal to the speed of the wave times the wave's frequency. the distance between where the wave is emitted and where it is absorbed. the distance between two adjacent peaks of the wave. the distance between a peak of the wave and the next trough.
The wavelength is the distance between two adjacent peaks of the wave.
Hence, option C is correct.
What is Wavelength?The distance between two identical locations (adjacent crests) in successive cycles is known as the wavelength, and it is used to describe waveform signals that are transmitted over wires or into space. Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm). The wavelength is more frequently described in nanometers (nm), which are units of 10-9 m, or angstroms, which are units of 10-10 m, for infrared (IR), visible light (UV), and gamma radiation.
Frequency, which is defined as the number of wave cycles per second, and wavelength have an inverse relationship. The wavelength of a signal decreases with increasing frequency, or we can say that wavelength and refractive index are inversely proportional to each other.
To get more information about Wavelength :
https://brainly.com/question/7143261
#SPJ2
A flatbed truck is carrying a 20.0 kg crate along a level road. the coefficient of static friction between the crate and the bed is 0.400, and the coefficient of kinetic friction is 0.300. what is the maximum acceleration that the truck can have if the crate is to stay in place relative to the truck?
The speed of a 4.0 n hockey puck, sliding across a level ice surface, decreases at the rate of 0.61 m/s2 . the coefficient of kinetic friction between the puck and ice is: hint: find the puck's mass first.
According to the periodic table, the average atomic mass of helium is
Helium has an atomic mass of 4.00 atomic mass units.
Are the items in the list renewable or nonrenewable resources?
Choose N for nonrenewable resources.
Choose R for renewable resources.
coal
silver
soil
water
diamonds
Answer:
Nonrenewable:Coal, Silver, soil and diamonds
Renewable- Water
Explanation:
i hope this helps you to answer your question
What kinds of images are made by painting or drawing on top of the surface of a rock?
Which of the following is not an example of an abiotic factor? a. plants b. air c. temperature d. soil Please select the best answer from the choices provided A B C D
The living beings in an ecosystem are named biotic factors. Living beings involve plants, creatures, bacteria, parasites and many more. The non-living components of an ecosystem are named abiotic factors. In an ecosystem, few abiotic factors are sunshine, temperature, climatic gases, water, and clay.
Plants are not an example of an abiotic factor.
Further Explanation:
Many factors affect the environment such as some factors determines how much the tree can grow, why birds are migrating one place to another, and where the plants and animals are found. There are mainly two types of factors that influence the environment are
Biotic Abiotic
Abiotic factors are referred as a non-living part of an environment that can easily influence living organisms. These factors are very crucial for living organisms. Every plant and animal requires these factors to live. Without these factors organism can become dehydrated, and week. Examples of Abiotic factors are:
Water Sunlight Temperature Oxygen Soil
Biotic factors are referred to as all the living parts of an ecosystem. For example, animals and plants are biotic factors. These living things of the ecosystem interact with each other in different ways. Thus, plants are part of biotic factors and not part of abiotic factor.
Learn more:
Learn more about abiotic factor https://brainly.com/question/1561256 Learn more about cellular respiration https://brainly.com/question/8900186 Learn more about primary and secondary succession https://brainly.com/question/4723069
Answer Details:
Grade: High School
Subject: Biology
Chapter: Ecology
Keywords:
Biotic, abiotic, sun, light, water, oxygen, plant, animal, non-living, living, ecosystem, organism, tree, grow, bird, migration.
A train is slowing down with an average acceleration of −5.0 m/s2 (negative sign shows deceleration). If its initial velocity is 50. m/s, how far does it travel in 6.0 seconds?
Answer:
the train travels 210 m
Explanation:
Kinematics equations of motion
[tex]vf=vi+a*t[/tex], equation(1)
[tex]vf^{2} =vi^{2} +2*a*d[/tex] equation(2)
Vi= initial velocity (m/s)
Vf= final velocity (m/s)
a = acceleration [tex]m/s^{2}[/tex]
d= traveling distance (m)
known information:
vi=50m/s
a=-5[tex]m/s^{2}[/tex]
t=6 s
Calculation of the final speed replacing the information known in the equation 1
[tex]vf=50-5*6[/tex]
[tex]vf=50-30=20m/s[/tex]
Calculation of the distance replacing the information known and the final velocity in the equation 2
[tex]20^{2} =50^{2} -2*5*d\\400= 2500-10d\\10d=2500-400\\d=2100/d\\d=210m[/tex]
In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will "stick" to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. what is the minimum rotational frequency, in rpm, for which the ride is safe?
Final answer:
The minimum rotational frequency needed for the amusement park ride to be safe is between 0.165 and 0.215 revolutions per minute. This is calculated based on the coefficient of static friction between the riders' clothing and the wall, and the radius of the cylinder.
Explanation:
In order for the riders to not slide down the wall of the amusement park ride, the centripetal force must be greater than or equal to the force of static friction between the riders' clothing and the wall. The centripetal force is given by the formula:
Fc = (mv^2) / r
where m is the mass of the rider, v is the linear speed, and r is the radius of the cylinder. The force of static friction is given by:
fs = μsN
where μs is the coefficient of static friction and N is the normal force.
At the minimum rotational frequency, the riders will experience the maximum static friction force:
fs(max) = μsN
Substituting the values and equations, we get:
(mv^2) / r = μsN
Since the normal force N is equal to the weight of the riders, we have:
(mv^2) / r = μs(mg)
Canceling out the mass on both sides and solving for v, we get:
v = √(μsgr)
The minimum rotational frequency is the linear speed v divided by the circumference of the cylinder:
f(min) = v / (2πr)
Substituting the value of v, we have:
f(min) = √(μsg / (2π))
Using the given range for the coefficient of static friction, the minimum rotational frequency is between 0.165 and 0.215 revolutions per minute.
The radius of a potassium atom is 0.227 nanometer (nm). what is this radius in centimeters (cm)?
a. 2.27 Ã 10â8 cm
b. 2.27 Ã 106 cm
c. 2.27 Ã 10â10 cm
d. 2.27 Ã 10â11 cm check answer
A nanometer is equivalent to 10^-9 meter. While a centimetre is equivalent to 10^-2 meter. Therefore the conversion factors are:
1 nanometer = 10^-9 meter
1 centimeter = 10^-2 meter
So,
0.227 nanometer * (10^-9 meter / 1 nanometer) * (1 centimeter / 10^-2 meter) = 2.27 x 10^-8 centimeter
Answer:
a
Velocity question...is it A B Cor D
If a motorcycle starts from rest and maintains a constant acceleration of 3 m/s^2, what will its velocity be after 10 s?
A. 10 m/s
B. 30 m/s
C. 90 m/s
D. 100 m/s
In the pulley system shown below, a 360 N weight is slowly lifted. Assuming the system is 100% efficient and each pulley is weightless, what is the minimum input force needed to lift the weight? Rope Pile L= 16.74m
A. 61 N
B. 121 N
C. 181 N
D. 361 N
Answer:
A. 61 N
Explanation:
In this system, there are three moveable pulleys. In this case, the rope will have to move six times as far as the weight will rise. In other words, the input distance is 6 times the output distance ( d in =6⋅ d out ) . Because the efficiency is 100%, the work input is equal to the work output, so we have:
work input = work output
f( in) ⋅ d( in) = f( out) ⋅ d( out)
f( in) ⋅ (6 ⋅ d( out)) = f( out) ⋅ d( out)
f( in) ⋅ 6 = f( out)
f( in) ⋅ 6 = 360 N
f( in) = 60 N
Another way to think of this is that since the rope has to move 6 times as far as the height of the weight, the mechanical advantage will be 6. Therefore, the input force needed is 360 ÷ 6 = 60 N . Of course, 60 N will balance the object, so a force slightly greater than 60 N (like 61 N) will be required to lift it.
As Lucy pushes a box across the floor, she exerts a force on the box in the forward direction. What is the equal and opposite force in this interaction, according to Newton\'s third law?
Final answer:
Newton's third law dictates that as Lucy pushes a box forward, the box pushes back with an equal and opposite force.
Explanation:
According to Newton's third law, whenever Lucy pushes the box across the floor exerting a force on it, the box exerts an equal and opposite force back onto Lucy. This law states that forces occur in equal but-opposite-to pairs -- meaning, if object A exerts a force on object B, object B exerts a force of equal magnitude but in the opposite direction on object A. In Lucy's case, as she pushes the box forward, the box pushes back on her with the same amount of force.
What influences the strength of an electric field?
When did galileo discover projectile motion?
Which is a major area of study in psychology?mentalism totalculturalism behaviorism actionism
Answer: behaviorism
Explanation:
The psychology can be define as the scientific study of the function of the mind and the behavior associated with it. The wide discipline of psychology deals with the study of the human development, health, sports, clinical , cognitive and social behavior.
The major area of study in psychology is the behaviorism. It is a systematic approach which is used to understand the behavior of the human beings. The behavior is the response to various stimuli of the environment. The behavior is associated with the reinforcement and punishment.
Top-down processing is often used when one encounters an unfamiliar stimulus. Please select the best answer from the choices provided T F
Answer: The given statement is False.
Top down processing is based on the information that is already present in the mind. It occurs when an individual works from general concepts ( that are imprinted in the brain) to specific.
This means that impressions that are already present in the brain influences the information that is gathered with the help of five senses. Thus, top down processing is not used when an individual encounters an unfamiliar stimulus.
Compare and contrast rutherford's "planetary model" of the atom with our current understanding of an atom's internal structure.
Rutherford's model revolutionized atomic theory by proposing a nucleated structure. Our current understanding, based on quantum mechanics, offers a more accurate and probabilistic description of the atom's internal structure.
Rutherford's model, proposed in 1911, was a significant departure from the earlier plum pudding model. It postulated a positively charged nucleus at the center of the atom, with negatively charged electrons orbiting around it in a manner similar to planets orbiting the sun.
However, our current understanding of the atom, based on quantum mechanics, is much more complex:
1. Electron Orbitals: Instead of well-defined orbits, electrons are found within orbitals, which are regions of space around the nucleus where the probability of finding an electron is high. These orbitals are defined by quantum numbers and have various shapes (s, p, d, f, etc.).
2. Quantization: Electrons can only occupy certain energy levels, and the energy of an electron in an atom is quantized. This is in contrast to the planetary model, where electrons could theoretically occupy any orbit at any distance from the nucleus.
3. Nuclear Structure: The nucleus itself is composed of protons and neutrons, which are further made up of quarks. Rutherford's model did not delve into the substructure of the nucleus.
4. Electron Spin and the Pauli Exclusion Principle: Electrons have an intrinsic property called spin, and the Pauli Exclusion Principle states that no two electrons in an atom can have the same set of quantum numbers.
A rocket initially at rest on the ground lifts off vertically with a constant acceleration of 2.0 Ã 101 meters per second2 . how long will it take the rocket to reach an altitude of 9.0 Ã 103 meters?
Answer:
Time taken, t = 30 seconds
Explanation:
It is given that,
Initial speed of the rocket, u = 0
It is lifted with a constant acceleration of, [tex]a=2\times 10^1\ m/s^2=20\ m/s^2[/tex]
Height to be attained, [tex]d=9\times 10^3\ m[/tex]
Let t is the time taken by the rocket to reach an altitude of [tex]9\times 10^3\ m[/tex]. Using the second equation of kinematics to find it as :
[tex]d=ut+\dfrac{1}{2}at^2[/tex]
[tex]d=\dfrac{1}{2}at^2[/tex]
[tex]t=\sqrt{\dfrac{2d}{a}}[/tex]
[tex]t=\sqrt{\dfrac{2\times 9\times 10^3}{20}}[/tex]
t = 30 seconds
So, the time taken by the rocket to reach given height is 30 seconds. Hence, this is the required solution.
A camel has a hump to store water so it can survive in its desert environment. Which kind of adaptation is this?
The sun lives in which component of the milky way?
What is the average acceleration of the particle between 0 seconds and 4 seconds?
The average acceleration of the particle between 0 seconds and 2 seconds is 4 m/s², and it is constant. From 2 seconds to 4 seconds, the particle experiences no acceleration as it moves at a constant velocity.
The question asks about the average acceleration of a particle between 0 seconds and 4 seconds. Since the acceleration is constant and equal to 4 m/s² along the x-direction, this value itself represents the average acceleration over the given time interval. There's no need to perform any additional calculations if the acceleration doesn't change with time, as is the case here.
However, it's important to note that the value of the constant acceleration (4 m/s²) applies only between 0 seconds and 2 seconds, after which the particle travels at constant velocity and the acceleration is zero.
A 0.50 kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 3.0 meters per second^2. Calculate The magnitude of the net force exerted on the frog as it leaps.
The magnitude of net force exerted on the frog is of 1.5 N.
Given data:
The mass of frog is, m = 0.50 kg.
The magnitude of acceleration of frog is, [tex]a = 3.0 \;\rm m/s^{2}[/tex].
As per the concept of Newton's Second law, the force applied on any object is equal to the product of mass and acceleration of an object. Then the expression is given as,
[tex]F=m \times a[/tex]
Solving as,
[tex]F = 0.50 \times 3.0\\\\F=1.5 \;\rm N[/tex]
Thus, we can conclude that the magnitude of net force exerted on the frog is of 1.5 N.
Learn more about the Newton's second law here:
https://brainly.com/question/19860811
25 points!
A boy with a mass 50 kg walks up the stairs from the ground to the top of a spiral water slide in 1 minute. The height of the slide is 11.5 m above the ground. As the boy slides down the slide and reaches the bottom, his speed is 12 m/s and the distance traveled along the slide is 108 m.
Find the mechanical energy lost by the boy in sliding down the slide.
What is the average frictional force acting on the boy?
A car accelerates from rest to a velocity of 5 meters/second in 4 seconds. What is its average acceleration over this period of time?
A: its acceleration is 1.25 meters/second.
B: its acceleration is 5 meters/second.
C: its acceleration is 0.8 meters/second.
D: its acceleration is 1.25 meters/second^2.
E: its acceleration is 20 meters.