Measuring human impact and comparing it with the biophysical world's carrying capacity is known as:________-
Answers
Measuring human impact and comparing it with the biophysical world's carrying capacity is known as Ecological footprint.
What is Ecological footprint?
The Global Footprint Network promotes the ecological footprint as a way to assess how much nature is needed to sustain a certain number of people or an economy. Through an ecological accounting system, it monitors this demand. The accounts compare the biologically productive areas used by people for consumption to the biologically productive areas available in a region or throughout the world (biocapacity, the productive area that can regenerate what people demand from nature). It measures the effects of humans on the environment, to put it briefly.
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Related Questions
Jose does push-ups by applying a force to elevate his body 10 cm off the ground. He does 50 J of work. If Jose does each push-up in two sec- onds, what is the power delivered?
Answers
The power delivered is 25 Watts (W) because Power = Work/Time = 50 J/2 seconds = 25 W.
What is power?Power is the rate at which work is done or energy is transferred. It is expressed as the amount of work done (in joules) divided by the time it takes to do the work (in seconds). Power is measured in units such as watts (W) or joules per second (J/s).
Power is an important concept in physics, engineering, and other sciences, as it allows us to understand the rate at which energy is used or transferred.
Calculation of power
Power = Work/Time
Power = 50 J/2 seconds
Power = 25 W
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7: A current of 3 ohm is drawn from 13v battery for 25 second find:
a) Charge
b) Energy in joules
c) Energy is transferred to the circuit in 15 second
Answers
Answer: To calculate the quantities related to the given electrical circuit, we can use the formulas related to charge, energy, and power.
a) Charge (Q):
The charge can be calculated using the formula: Q = I * t, where I is the current and t is the time.
Given:
Current (I) = 3 ohms (A)
Time (t) = 25 seconds
Q = 3 A * 25 s = 75 Coulombs
b) Energy (E):
The energy can be calculated using the formula: E = V * Q, where V is the voltage and Q is the charge.
Given:
Voltage (V) = 13 V
Charge (Q) = 75 C
E = 13 V * 75 C = 975 Joules
c) Energy transferred in 15 seconds:
To calculate the energy transferred in 15 seconds, we need to find the power first.
Power (P) can be calculated using the formula: P = V * I, where V is the voltage and I is the current.
Given:
Voltage (V) = 13 V
Current (I) = 3 A
P = 13 V * 3 A = 39 Watts
Now, we can calculate the energy transferred in 15 seconds using the formula: E = P * t, where P is the power and t is the time.
Given:
Power (P) = 39 W
Time (t) = 15 s
E = 39 W * 15 s = 585 Joules
Therefore, the answers are:
a) Charge = 75 Coulombs
b) Energy = 975 Joules
c) Energy transferred in 15 seconds = 585 Joules
Explanation:
A 23-N force is applied to a 7-kg object to move it with a constant velocity of 6.1 m/s across a level surface. The coefficient of friction between the object and the surface is approximately ____. Round your answer to the hundredths place.(Use the approximation g ≈ 10 m/s2.)
Answers
Given:
The applied force is F = 23 N
The mass of the object is m = 7 kg
The object moves with a constant velocity of v = 6.1 m/s
The acceleration due to gravity is g = 10 m/s^2
Required: The coefficient of friction between the object and the surface.
Explanation:
The object moves at a constant velocity, so the acceleration will be zero.
The equation of motion can be written as
\(\begin{gathered} F-f\text{ = ma} \\ F-f\text{ =m}\times0 \\ F-f=0 \\ F=f \end{gathered}\)So, the applied force will be equal to the frictional force.
The coefficient of friction can be calculated as
\(\begin{gathered} F\text{ = }\mu mg \\ \mu=\frac{F}{mg} \end{gathered}\)On substituting the values, the coefficient of friction will be
\(\begin{gathered} \mu=\frac{23}{7\times10} \\ =\text{ 0.33} \end{gathered}\)Thus, the coefficient of friction is 0.33
Final Answer: The coefficient of friction between the object and the surface is 0.33.
The Earth moves in a nearly perfect circle around the Sun. Assume the speed stays
constant. Is Earth accelerating?
Answers
Answer:
yes
Explanation:yes
Answer:
Yes
Explanation:
Earth is accelerated around the sun
how can the movement of energy can be tracked by observing the changes the energy causes to matter
Answers
Density of a liquid is 0.80 g/cc. When the liquid is filled in the bottle, the mass of the bottle becomes 75g. If the bottle weighs 35g while it was empty, then calculate the volume of the liquid.
Answers
Explanation:
75g = Mass of bottle + Mass of liquid
35g = Mass of bottle
Therefore Mass of liquid = 40g.
Volume of liquid = Mass/Density = 35/0.80 = 43.75cc.
A westward-moving bicycle slows down from 10.0m/s to 4.0m/s. What is the magnitude and direction of the acceleration
Answers
Answer:
a = -6/t (on the opposite direction of the bicycle motion)
Explanation:
For all problems of physics we need to set the positive axis direction. and the origin. In our case the origin location does not make difference since we are only interested in velocities and acceleration. So I'm gonna set the positive axis in the same direction that the bicycle is moving. Therefore, our initial (10 m/s) and final (4 m/s) velocities are also positive.
However we have some problems. We do not know how this bicycle was decelerated (constant or not). Besides we do not have the information like time or displacement of this deceleration.
So, supposing an uniform deceleration and using the velocity time function for uniform "a", we get:
v = vo + at (set the initial time to 0s)
4 = 10 + at
a = -6/t
So you only can determine the acceleration if you have either the time or the displacement (using Torricelli equation). But we know that our bicycle acceleration points against the direction of the bicycle motion due to the negative sign.
a below glide slope indication from a pulsating approach slope indicator is a
Answers
When a below glide slope indication is shown by a pulsating approach slope indicator, it means that the aircraft is below the desired glide slope. The pulsating approach slope indicator is a system of lights that can be used to help pilots maintain the correct descent rate while landing on an instrument approach.
This is accomplished by using a series of red and white lights that are arranged in a horizontal line. The aircraft is on the correct glide slope when the pilot sees two white lights and two red lights. When the aircraft is above the desired glide slope, the pilot will see more white lights than red lights. When the aircraft is below the desired glide slope, the pilot will see more red lights than white lights. In the event that the pilot sees a below glide slope indication from a pulsating approach slope indicator, they must adjust their descent rate to increase the aircraft's altitude and bring it back up to the desired glide slope.
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The Great Pyramid is 146m high. How long is a ramp from the top of the pyramid to the ground that has a mechanical advantage of 4?
Please give equation.
Answers
To find the length of the ramp, we can use the equation for mechanical advantage (MA), which is:
MA = load / effort
The mechanical advantage of the ramp is 4, which means that for every 4 units of distance the load is moved, the effort required is moved 1 unit of distance. Therefore the effort is 4 times shorter than the load distance.
We know that the load distance is the height of the pyramid, which is 146m. So, we can use this information to find the effort distance.
Effort distance = Load distance / MA
Effort distance = 146m / 4 = 36.5m
So, the ramp would need to be 36.5m long in order to provide a mechanical advantage of 4.
Select the correct answer. What are the directions of an object's velocity and acceleration vectors when the object moves in a circular path with a constant speed? A. The question is meaningless, since the acceleration is zero.
B. The vectors point in opposite directions.
C. Both vectors point in the same direction.
D. The vectors are perpendicular.
Answers
The centripetal acceleration which always act toward the center of the circle. The vectors are perpendicular. The correct answer for this question, is option D
The speed of an object is always constant in a circular motion while the object keeps changing direction regularly. The velocity will keep changing because of the change in direction.
Whenever there is a change in velocity, there must be acceleration.
When the object is moving in a circular path with a constant speed, the directions of an object's velocity and acceleration vectors will be perpendicular to each other
The reason is because acceleration is centripetal acceleration which always act toward the center of the circle.
Therefore, the correct answer for this question, is option D
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when a transition metal atom formas an ion which electrons are lost first
Answers
In general, transition metals lose their valence electrons first when forming ions. However, the specific electrons lost can depend on the particular transition metal and its electronic configuration.
Transition metals are elements in the d-block of the periodic table and have partially filled d orbitals. When forming ions, they typically lose their valence electrons, which are the electrons in the outermost shell. These electrons are lost first because they have the highest energy and are therefore the easiest to remove.
However, the specific electrons that are lost can depend on the particular transition metal and its electronic configuration. For example, in the case of copper (Cu), the electron configuration is [Ar] 3d10 4s1, and it is more energetically favorable for the 4s electron to be lost before the 3d electrons.
Overall, the order in which electrons are lost during ion formation for transition metals depends on the electronic configuration and energy levels of the atoms involved.
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please fast
The system shown in the figure below uses three chain comveyors. Each chain has a hydraulic motor: The torque that drives the motors is T: =1500 N.m
1 T2 =700 Nm and, T3 = 300Nm. The displactment volume of the motors is V01 =1000 cm3/rev V02 =1000 cm3/rev and, V09 =500 cm3 /rex. The motss have a volumetric efficiency of 0.9 and an overall efficiency of 0.85. The leakage of the bydraulic motors 1 and 3 is internal completely and the leakage of the hydraulic motor 2 is external completely. The pump produces a constant volumetric flow rate of 6.3U/min.
The orifice of the flow control valve has a 0.5 mm diameter. The pressure fosses through the pipes are neglected. The capacity coefficient of the needie valve is 07. The volumetric Alow rate through the needle valve is given by: Q=C×A2 ×ΔF/rho where C is the capacity coefficient, A is the area of the orifice, ΔP is the difference of pressure through the needle valve and, rho is the density of the fiuid.
The density of the oil used in the hydraulic system is 860 kg/m3 . Determine the rotational speed of the motor 3 in rpm. a. 8 b. 92 c. 67 d. 42 e. 34 E. 56
Answers
The rotational speed of the motor 3 in rpm. b. 92
The figure shows a hydraulic circuit that uses three chain conveyors. The torque that drives the motors is T: =1500 N.m. T2 =700 Nm and, T3 = 300Nm.The volumetric flow rate produced by the pump is 6.3 liters per minute. The displacement volume of the motors is V01 =1000 cm3/rev. V02 =1000 cm3/rev and, V09 =500 cm3/rex.
The motors have a volumetric efficiency of 0.9 and an overall efficiency of 0.85. The leakage of hydraulic motors 1 and 3 is internal completely, while the leakage of hydraulic motor 2 is external completely.The orifice of the flow control valve has a diameter of 0.5 mm. The capacity coefficient of the needle valve is 0.7.
The pressure losses through the pipes are ignored. The volumetric flow rate through the needle valve is Q = C × A2 × ΔP / ρ where C is the capacity coefficient, A is the area of the orifice, ΔP is the pressure difference through the needle valve, and ρ is the density of the fluid. The density of the oil used in the hydraulic system is 860 kg/m3. We need to determine the rotational speed of motor 3 in rpm.
So,Let’s first determine the volumetric flow rate required by hydraulic motor 3. Using the expression of volumetric flow rate through the needle valve, we have Q = C × A2 × ΔP / ρ… (i)We are given that the capacity coefficient of the needle valve is 0.7. Its orifice diameter is 0.5 mm.
Hence, the area of the orifice is given byA2 = π d2 / 4where d is the diameter of the orifice. So, A2 = π × (0.5 mm)2 / 4 = 0.196 mm2 = 1.96 × 10-7 m2Using equation (i), we haveQ = C × A2 × ΔP / ρNow, we will calculate ΔP. To do this, we need to determine the flow rates Q1, Q2, and Q3.Let Q’ be the total volumetric flow rate through the system.
Since the overall efficiency of the system is given as 0.85, we haveQ’ = 0.85 × 6.3 l/min = 5.355 l/min = 5.355 × 10-3 m3/minWe know that the volume of fluid passing through the hydraulic motors is equal to their displacement volume multiplied by the number of revolutions per unit time.So, we haveQ1 = V01 × n1 … (ii)Q2 = V02 × n2 … (iii)Q3 = V03 × n3 … (iv)where V01, V02, and V03 are the displacement volumes of hydraulic motors 1, 2, and 3, respectively.
We are given that V01 = V02 = 1000 cm3/rev and V03 = 500 cm3/rev, which gives V01 = V02 = 1 × 10-6 m3/rev and V03 = 0.5 × 10-6 m3/rev.Substituting equations (ii), (iii), and (iv) in equation (i), we haveQ = C × A2 × (Q1 + Q2 - Q3) / ρSolving for Q3, we getQ3 = (Q1 + Q2 - Q) / C × A2 × ρPutting the given values in the above expression, we haveQ1 = V01 × n1 = (1 × 10-6 m3/rev) × n1Q2 = V02 × n2 = (1 × 10-6 m3/rev) × n2Q3 = V03 × n3 = (0.5 × 10-6 m3/rev) × n3Q = 5.355 × 10-3 m3/min = 5.355 × 10-3 / 60 m3/s = 8.925 × 10-5 m3/sA2 = 1.96 × 10-7 m2C = 0.7ρ = 860 kg/m3
Substituting the above values, we get8.925 × 10-5 = (1 × 10-6 × n1 + 1 × 10-6 × n2 - 0.5 × 10-6 × n3) / (0.7 × 1.96 × 10-7 × 860)Solving for n3, we have n3 = 91.6 rpmSo, the correct option is b. 92.
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When a basketball player jumps to make a shot, _____.
Answers
Answer:
i would like some more explanation i dont understand the question enough
Explanation:
Answer:
Its D.
Explanation:
"When a basketball player jumps to make a shot, _____.""A:the forces on the player’s feet and on the floor are both in the upward direction B:the action-reaction forces are unequal because they act on different objects C:the force with which he jumps is equal to the force with which he shoots the ball D:the downward force on the floor is equal to the upward force on his feet "the floor is flat so it wont be a bc the shoes or not flat and its not b bc how u saypost to jump up uk and its not c bc u need to jump u cant just hit your shot when u jump up u gotta make sure u aimed for the shot soTrue or false, anything can turn into a black hole.
Answers
Answer:
False. Not everything can turn into a black hole. The formation of a black hole requires a massive object, typically a star, to collapse under its own gravity. This collapse causes the object to become so dense that it creates a singularity, a point of infinite density at the center of the black hole, which is surrounded by an event horizon, the point of no return beyond which nothing, not even light, can escape. So, only objects with sufficient mass and gravity can become black holes.
Explanation:
What water pressure must a pump that is located on the first floor supply to have water on the thirteenth of a building with a pressure of 35 lb/in2 Assume that the distance between each floors is 10ft.
Answers
The water pressure on the first floor must be 455 PSI in order to push the water to the 13th floor at the given pressure.
The given parameters;
Pressure on the 13 th floor, P₁ = 35 PSIDistance between each floor, d = 10 ftThe vertical pressure of the water is calculated as follows;
\(P = \rho gh\\\\\frac{P}{h} = \rho g\\\\\frac{P}{h} = k\\\\\frac{P_1}{h_1} = \frac{P_2}{h_2} \\\\\)
The vertical height of the first floor from the 13th floor = 130 ft
The vertical height of the 13 ft floor = 10 ft
\(P_1 = \frac{P_2 h_1}{h_2} \\\\P_1 = \frac{35 \times 130}{10} \\\\P_1 = 455 \ PSI\)
Thus, the water pressure on the first floor must be 455 PSI in order to push the water to the 13th floor at the given pressure.
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Which of these objects has kinetic energy?
Answers
Answer:
A ball moving through the air.
Explanation:
The ball has momentum which is a form of kinetic energy.
I don't know if that is correct, but I hope it helps!!!!
Walking, jogging, and running
A driving car
a baseball being thrown
A student makes the following claim about electron flow through a circuit that includes a battery and a bulb:
"The current through the circuit is called alternating current because the electrons move from the negative side of the battery, through the circuit, to the positive side
of the battery."
What, if anything, is incorrect about the student's claim?
A)The student is incorrect that electrons move through the circuit.
B)The student's claim is correct.
C)The student is incorrect about the definition of alternating current.
D)The student is incorrect about the direction electrons move through the circuit.
Answers
The incorrect option about the student's claim is option B which is his
claim about alternating current being correct.
What is Alternating current?This is the type of electron flow which involves a periodic reversal in
direction and changes in magnitude in the circuit.
In a circiuit electrons from the negative terminal to the positive one and
his claim mis correct about direct current which makes his claim wrong.
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30 Joules of energy enter a light bulb. 20 joules of energy are transformed into light; how much energy is dissipated as heat?
Answers
someone help me plz
Answers
Answer:
Aerobic exercise includes?
(C) All activities that make you tired and short of breathe.
2. Which choice is an intense exercise that involve short burst of activity in which the muscles worked so hard that they produce energy without using energy?
(B) anaerobic exercise
Explanation:
What happens to the energy in a system of magnets when the magnetic force causes two magnets to move?.
Answers
When the two magnets are made to move, the energy of the system in the system tends to change potential energy into the kinetic energy
Potential energy is the energy stored in the body while is at rest which would turn into kinetic energy when the object will initiate motion. This conversion of potential energy to kinetic energy is understood by the Work-Energy theorem. The kinetic energy is formulated as,
K.E. = 1/2 mv²
where K.E = Kinetic energy
m = mass of an object
v = velocity of the object
The work-energy theorem is stated as the products of all the forces acting on the system are equal to the difference in kinetic energies.
∑W = ΔK.E
where W = Work done on the system
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which of the following correctly describes the hierarchy of genetic material within a cell
Answers
Answer: D- Each chromosome in a cell is made up of two chromatids, which are each made up of molecules of DNA
Explanation:
A macromolecule is a large molecule that is made of many smaller units. Chromosomes are macromolecules that contain all of the genetic information in a cell. Chromosomes are each made of two smaller units called chromatids. Chromatids are each made up of molecules of DNA. Therefore, the correct description of the hierarchy of genetic material in a cell is that each chromosome in a cell is made up of two chromatids, which are each made up of molecules of DNA. The structures become more and more microscopic as one moves down the hierarchy.
A car drives 2 blocks north, then 3 blocks east, and finally 2 blocks south. What is the
displacement of the car?
A) 15 km
B) 3 km west
C) 3 km east
D) 7 km north
Answers
Esther dives off a 3m springboard and initially bounces up with a velocity of 8.0 m/s at an angle of 80.0 to the horizontal.. what are the horizontal and vertical components of her velocity
Answers
This question involves the concept of the resolution of a vector into its rectangular components.
The horizontal component of velocity is "1.4 m/s", and the vertical component of the velocity is "7.9 m/s".
In order to find the horizontal and vertical components of the velocity of Esther, we must resolve the velocity vector into its rectangular components. Hence, the following formulae will be used:
\(Horizontal\ Component = v_x = v\ Cos\theta\\v_x = (8\ m/s)(Cos\ 80^o)\\v_x = 1.4\ m/s\)
\(Vertical\ Component = v_y = v\ Sin\theta\\v_y = (8\ m/s)(Sin\ 80^o)\\v_y = 7.9\ m/s\)
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The attached picture shows the resolution of a vector.
If an object's surface area is smaller does it create more or less pressure?
Answers
Answer:
When the surface area is less the pressure exerted by the object is more. However, when the surface area is large, the points of contact between the object and the pressure. Thus, less pressure is exerted by the body on the surface.Explanation:
hope it helpsIf the surface area of an object is smaller, it will create more pressure
An object's surface area is inversely proportional to its pressure.
This can be demonstrated from the formula below
Pressure:The can be defined as the perpendicular force acting per unit area. the S.I unit of pressure is N/m².
Formula:P = F/A.................. Equation 1Where: P = Pressure of the objectF = Force acting on the objectA = Surface area of the object.In View of the above equation, It can be seen that as the surface area of an object reduces the pressure created by the object will increase.
Hence, If the surface area of an object is smaller, it will create more pressure
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Why does the periodic table work?
Answers
Answer:
The table lists the chemical elements in order of increasing atomic number, which is the number of protons in an atom of an element.
Explanation:
The periodic table is a graphical collection of element data. The table lists the chemical elements in order of increasing atomic number, which is the number of protons in an atom of an element. The rows (periods) and columns (groups) organize elements according to similar properties.
The atomic number, or the number of protons in an element's atom, is used in the table to organize the chemical elements.
How does the periodic table ?The Gaussian Model in subatomic particles, which allows the known elementary particles to be arranged according to their inherent properties, can be compared to the periodic table. The table is significant because it is set up to offer a wealth of knowledge on elements and their interactions in a single reference. Even elements that have yet to be found can have their properties predicted using the table.
What is periodic table and its importance?All known elements are grouped together in the periodic table of the elements into groupings with related properties. It becomes a crucial tool for chemists, nanotechnologists, as well as other scientists as a result. You can forecast how chemicals will react if we learn to use and comprehend the periodic table.
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Water has a high specific heat capacity. This means that a lot of energy is needed to change its temperature. True or false?
Answers
Answer:
a true
Explanation:
Water has the high specific heat capacity.
That means it resists to change its temperature when a considerable amount of heat lost or gained
4200J is needed to raise the temperature of 1kg substance by 1 degree Celsius
A car with a mass of 1,500 kg is driving at 20 m/s. What is the kinetic energy of the car?
O 15,000 J
O 300,000 J
O 30,000 J
O 150,000 J
Answers
The kinetic energy of the car is 300,000J
What is Kinetic energy?Kinetic energy is the energy of motion.
The formula for kinetic energy is given as \(K.E = \frac{1}{2} mv^{2}\)
where m = mass of object , v = speed of object.
An object having some speed and mass will have kinetic energy while an object at rest will not have any kinetic energy since the speed of object at rest is zero.
Since at rest speed is zero, an object has kinetic energy only when it is in motion.
From the question,
m = 1,500kg
v = 20m/s
K.E = (1/2) x 1,500 x 20 x 20
K. E = 300,000J
The car now possess a kinetic energy of 300,000J
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please help me answer
Answers
D. 55 Kg mass moving at 1 m/s, is the correct answer.
The more mass the object has, the greater inertia is. It doesn't matter how fast the object is going because inertia is depended on mass.
Fitness walking reduces the risk of which disease?
A. pertussis
B. diabetes
C. polio
D. malaria
Answers
Answer:
B
Explanation:
You lose more calories, and are on a lower risk
please help i’m so lost✋:
Place the following events describing the production of electrical energy from a nuclear fission reactor in the correct order. Write the numbers 1 (first) through 7 (fast) in the spaces provided.
Answers
The thermal energy from nuclear reactions is first converted to mechanical energy and finally to electrical energy for use by the community.
What is nuclear energy?Nuclear energy is the energy produced as a result of changes that occur in the nucleus of atoms of elements. These changes are known as nuclear reactions.
Electrical energy can be generated from nuclear reactions.
The steps in the generation of electrical energy from nuclear reactions is as follows:
A neutron bombards a uranimu-235 isotope A uranium-235 atom splits, producing atoms with smaller nuclei, three neurons, and thermal energythermal energy released by the react ion is added to water superheated water passes through a thermal exchanger, where the thermal energy released boil a separate system of water to produce steam steam produced by boiling water causes the blade of a turbine to rotate The mechanical energy of the rotating turbine is transferred to an electric generator electricity from the generator is carried to the community through wires.Therefore, the thermal energy from nuclear reactions is converted to electrical energy for use by the community.
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