Answer:
Explanation:
water-renewable
forest-renewable
soil-non-renewabal
animals-non-renewable
a stationary police officer directs radio waves emitted by a radar gun at a vehicle toward the officer. Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a A.) longer wavelength B.) higher speed C.) longer period D.) higher frequency
Answer:
D) Higher Frequency
Explanation:
Higher frequency because it says a vehicle “towards” the officer
What are examples of non-conservative forces?
A)gravity
B)Friction and air resistance
C)potential energy
D)kinetic energy
Answer:
Examples of non-conservative forces are friction and resistance.
Explanation:
Most energy in the sun is created by:
A ) Hydrogen atoms fusing into larger Helium atoms
B ) Helium atoms splitting into Hydrogen atoms
C ) Hydrogen atoms splitting into Helium atoms
Answer:
it's A) Hydrogen atoms fusing into larger Helium atoms
A negative charge is moving across a rook from south to north. A magnetic field runs from East to west. In what direction is the magnetic force on the moving negative charge?
A. Toward the East
B. Toward the west
C. Toward the floor
D. Toward the ceiling
Answer:
The magnetic force on the moving negative charge is towards the ceiling.
Explanation:
The magnetic force acting on a wire is given by the relation as follows :
[tex]F=q(v\times B)[/tex]
q is charged particle
v is velocity of charged particle
B is magnetic field
In this case, a negative charge is moving across a rook from south to north. A magnetic field runs from East to west.
q = -q
v =+j
B = -i
So,
[tex]F=-q(vj\times B(-i))[/tex]
Since, [tex]j\times i=-k[/tex]
So,
[tex]F=q(v\times B)(-k)[/tex]
So, the magnetic force on the moving negative charge is towards the ceiling.
a(n) ______ reverses the flow of current through an electric motor.
brush
battery
armature
commutator
Answer:
D). Commutator
Explanation:
Got Correct Edge 2022.
What do a mirror and a magnifying glass have in common? What makes them different?
ˆˆI mean this in terms of a physics point of view, like the angles, etc.
Answer:
They both have a reflection, but a mirror just reflects anything in front of it, while a magnifying glass helps you see closer through the reflection of something.
Explanation:
Why do you lose balance while standing on a bus often. Need a expert to answer this. Must choose if 1st 2nd or 3rd Newton Law. And explain Please help.
Answer:
The loss of balance while standing on a bus often is due:
The third Newton law.Explanation:
The third Newton law from Latin says: "Action is always opposed an equal reaction: or the two bodies on each other are always equal, and in opposite directions," which means that when a force is exercised in a direction by a body, the other body in the interaction exercises a force in the other direction. In the case of the person on the bus, when the bus makes a force forward, your body makes a force in the other direction (back), in a similar case, when the bus stops, its force in directed to the back, in that time your body make a force forward, in each case your body can lose balance because your center of gravity is directed in the same direction in which the opposite force to that of the bus moves.
Two runners ran side by side each holding one end of a horizontal pole. What would most likely happen if one of the runners began jogging in knee-deep water?
Answer:
Hope this helps :)
The runner in the water would be going slower than the other runner. The pole would be in a slanted position and one runner would be ahead of the other.
Explanation:
Water makes you slow down, therefore it would cause the runner jogging in knee deep water to move slower than the runner outside of the water. Because one runner is moving slower than the other, the pole would be in a slanted position.
The runner throughout the water would've been traveling at a moderate speed than some of the other speeds.
This same pole would've been angled, as well as one runner would've been forward of one another. Water slows someone downward immediately, which is why a runner running in lower extremity waters will go slower than that of a racer beyond the waters or pool. Although one runner was traveling slower than another and, the flagpole would've been tilted.Thus the above response is correct.
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hi:) is part (c) correct?
Answer:
0.000253 kg/m³ (to 3 s.f.)
Explanation:
Please see attached picture for full solution.
Your working is correct but the answer should be 0.000253 kg/m³ when rounded off to 3 significant figures.
Americium-241 is used in smoke detectors. It undergoes alpha decay with a half life of 432 years. The alpha particles ionize some of the air near the americium-241 source, and these charged ions are collected on a metal plate that has a small voltage applied to it. The collected particles cause a small electric current to flow in the detector. If smoke particles get in between the americium-241 source and the detector and reduce the current, the alarm is triggered. A typical smoke detector experiences 370000 alpha decays each second. How much time is needed for the number of decays to reduce to 93000 decays per second?
Answer:
860.6 years.
Explanation:
The parameters given are;
Initial detector activity = 370000 alpha decays per second
Final detector activity = 93000 alpha decays per second
Formula for time to change in activity is given by the following relation;
[tex]t_{93000} = \dfrac{-ln\dfrac{A}{A_0} }{\lambda} = \dfrac{-ln\dfrac{93000}{370000} }{5.08 \times 10^{-11}} = 2.72 \times 10^{10} \, seconds[/tex]
t₉₃₀₀₀ = 2.72 × 10¹⁰ seconds = 860.6 years.
URGENT The nuclear equation is incomplete what particle completes the equation.
Answer: A
Xenon 138
Explanation:
In the attached nuclear reaction, the sum of the mass number in LHS is
239 + 1 = 240
While the Atomic number = 54 + 0 = 54
The sum of the mass number in the RHS is 100 + 2(1) = 102
While the sum of the atomic number is
40 + 0 = 40
The mass number of the missing element is
240 - 102 = 138
While the Atomic number of the missing element is
94 - 40 = 54
Nuclear reaction at equilibrium, the mass number and the atomic number at LHS must be equal to RHS
The missing element is Xenon 138 with atomic number of 54
Therefore, when the Plutonium is bombarded with a neutron, the result of the reaction is the production of Zirconium 100 and Xenon 138 with the bombardment of two neutrons
How many kW*h (kilowatt hours) of electricity is consumed by a 500 w light bulb that burns
for seven hours?
Answer: 3.5 kWh
Explanation:
Given that the
Power P = 500 W
To convert watt to kilowatt, divide it by 1000
Power P = 500/1000 = 0.5 kw
Time t = 7 hours
Power is the rate at which work is done. That is,
P = WD/t
Cross multiply
WD = Pt
Where workdone WD is the energy E consumed in kWh .
Substitute P and t in the formula above.
E = 0.5 × 7
E = 3.5 kWh
Therefore, 3.5 kWh (kilowatt hours) of electricity is consumed by a 500 w light bulb that burns.
Plz answer them I need answers ASAP
Answer:
4. 13.04m/s²
5. 4x10^11m/s²
6. –3m/s²
Explanation:
Acceleration is defined as rate of change of velocity with time. Mathematically it is represented as:
a = (v – u)/t
a is the acceleration.
v is the final velocity.
u is the initial velocity.
t is the time
With the above formula, we can obtain the acceleration of each question.
4. Determination of the acceleration of the spacecraft.
Data obtained from the question include the following:
Initial velocity (u) = 0
Final velocity (v) = 67.8m/s
Time (t) = 5.2secs
Acceleration (a) =..?
a = (v – u)/t
a = (67.8 – 0)/5.2
a = 13.04m/s²
Therefore, the acceleration of the spacecraft is 13.04m/s².
5. Determination of the acceleration of the electron.
Data obtained from the question include the following:
Initial velocity (u) = 0
Final velocity (v) = 2.6x10^5m/s
Time (t) = 6.5x10^-7secs
Acceleration (a) =..?
a = (v – u)/t
a = (2.6x10^5 – 0)/ 6.5x10^-7
a = 4x10^11m/s²
Therefore, the acceleration of the electron is 4x10^11m/s².
6. Determination of the acceleration of the truck.
Data obtained from the question include the following:
Initial velocity (u) = 20m/s
Final velocity (v) = 5m/s
Time (t) = 5secs
Acceleration (a) =..?
a = (v – u)/t
a = (5 – 20)/5
a = –15/5
a = –3m/s².
Therefore, the acceleration of the truck is –3m/s².
hi:) I don’t understand why acceleration of free fall is equal to gravitational field strength. anyone able to help? Thank you :)))!
Explanation:
It was learned that a free-falling object is an object that is falling under the sole influence of gravity. A free-falling object has an acceleration of 9.8 m/s/s, downward (on Earth). ... The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
Hope this helps..
Explanation:
It was learned that a free-falling object is an object that is falling under the sole influence of gravity. A free-falling object has an acceleration of 9.8 m/s/s, downward (on Earth). ... The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
Hope this helps..
An astronaut in space pushes a piece of equipment to get it into the correct position. What does Newton's third law of motion tell us about this? Question 5 options: The equipment would have accelerated much faster if the astronaut had applied a much greater force to it. The equipment will "push back" on the astronaut with the same amount of force. The equipment would have stayed in the same exact location indefinitely until the very moment the astronaut applied force to it. The equipment will continue moving in the same direction indefinitely unless another force is applied to stop it.
Answer:
Newton's third law of motion can be summed up as "For every action, there is an equal and opposite reaction." This means that when the astronaut applies force to push the object, that object will apply an equal amount of force to the astronaut.
Explanation:
Newton's third law of motion can be summed up as "For every action, there is an equal and opposite reaction." This means that when the astronaut applies force to push the object, that object will apply an equal amount of force to the astronaut.
What is equal and opposite according to Newton's third law?According to Newton's third law of motion, forces always act in equal but opposite pairs. Another way of saying this is for every action, there is an equal but opposite reaction. This means that when you push on a wall, the wall pushes back on you with a force equal in strength to the force you exerted.
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Which law describes the magnetic field in a nonlinear wire? A. Faraday's law B. Gauss's law C. Ohm's law D. Ampère's law
Answer:
D. Ampère's law
Explanation:
I got a 5 on plato
The law that describes the magnetic field in a nonlinear wire is Ampère's law. The correct option is D.
What is Ampère's law?Ampère's law is a fundamental law of electromagnetism that describes the relationship between the electric current flowing through a wire and the magnetic field it produces. It states that the magnetic field around a closed loop is proportional to the electric current passing through the loop.
Mathematically, Ampère's law can be expressed as:
∮ B ⋅ dl = μ0I
Where B is the magnetic field, dl is an element of the closed loop, μ0 is the magnetic constant, and I is the current passing through the loop. The integral is taken around a closed path that encloses the current-carrying wire.
Ampère's law is useful in calculating the magnetic field produced by a current-carrying wire or a system of wires. It also helps to understand the behavior of magnets and how they interact with each other.
It is important to note that Ampère's law only applies to steady currents and does not take into account the effects of changing electric fields. For this, Faraday's law of electromagnetic induction is used.
Here in the Question,
A. Faraday's law: This law describes the relationship between a changing magnetic field and an induced electric field. It states that the magnitude of the induced EMF is proportional to the rate of change of magnetic flux.
B. Gauss's law: This law deals with the electric field and its relationship with electric charges. It states that the electric flux through a closed surface is proportional to the charge enclosed within the surface.
C. Ohm's law: This law describes the relationship between current, voltage, and resistance in a conductor. It states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor.
Therefore, The correct answer is D i.e. Ampère's law.
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The turning effect of a force is called a moment. Calculate the moment of a force of 3 N acting 0.2 m from a pivot
Answer:
15 Nm
Explanation:
Moment of the force = force × perpendicular distance from pivot to the line of action of the force
Moment of the force = 3 × 0.2 = 15 Nm
The moment of a force of 3 N acting 0.2 m from a pivot is 15 Newton· meter.
What is moment of force?
Torque is the rotating equivalent of force in physics and mechanics. The moment of force is another name for it (also abbreviated to moment). It illustrates how a force can cause a change in the body's rotational motion.
Mathematically, the definition of moment of force is given as:
Moment of the force = force × perpendicular distance from pivot to line of action of the force.
Given parameters:
Force acting on the object: F = 3 Newton.
Perpendicular distance from pivot to the line of action of force = 0.2 meters.
Hence, Moment of the force = 3 Newton × 0.2 meter = 15 Newton· meter.
So, the moment of a force of 3 N acting 0.2 m from a pivot is 15 Newton· meter.
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A machine uses an input force of 200 newtons to produce an output force 1 point
of 800 newtons. What is the mechanical advantage of this machine? *
Your policy says you have 50/100/30 coverage.
Check the correct coverage for this policy.
$50,000 coverage for all injuries in one accident.
$100,000 coverage for all injuries in one accident.
$50,000 coverage for all property damage in a single collision.
$50,000 coverage for injuries to one person in one accident.
$50,000 coverage for damage to a single vehicle in one accident.
$30,000 coverage for all property damage in a single collision.
Answer:
c
Explanation:
The correct coverage for this liability will include:
$50,000 coverage for injuries to one person in one accident.$100,000 coverage for all injuries in one accident.$30,000 coverage for all property damage in a single collision.When a policy says that one has 50/100/30 coverage, it's simply referring to a car insurance coverage. In such a case, the insurance company will pay $50000 in bodily injury liability per person.
The insurance company will also pay $100,000 in bodily injury liability per accident, and will also pay $30,000 in property damage liability.
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All lenses are objects that _____.
A. reflect light to create an image
B. refract light to create an image
C. reflect light to spread light rays apart
D. refract light to spread light rays apart
Answer:
B AND D ARE THE CORRECT OPTIONS
HOPE ITS HELPFUL.....
Answer:
B. refract light to create an image
Explanation:
Which of the following is a source of visible light?
A) a cat
B) a sofa
C) a lamp
D) a plant
Answer:
The Sun
Explanation:
The Sun is a natural source for visible light waves and our eyes see the reflection of this sunlight off the objects around us. The color of an object that we see is the color of light reflected. All other colors are absorbed. Light bulbs are another source of visible light waves. hope this helps you :)
Nephrons and filtration work because the fluid going into the nephron capsule is under _________ pressure than the fluid outside the capsule.
Answer
Hydrostatic pressure
Explanation:
Filtration occurs as pressure forces fluid and solutes through a semipermeable barrier with the solute movement affected by particle size. Hydrostatic pressure is the pressure produced by a fluid against a surface. The blood inside the glomerulus creates glomerular hydrostatic pressure which forces fluid out of the glomerulus into the glomerular capsule. The fluid in the glomerular capsule creates pressure pushing fluid out of the glomerular capsule back into the glomerulus, opposing the glomerular hydrostatic pressure. This is the capsular hydrostatic pressure. These fluids exert pressures in opposing directions. Net fluid movement will be in the direction of the lower pressure.
What are two interchangeable terms with radiation?
Answer:
volume and dynamics
Explanation:
A football team wears a yellow shirt and white shorts. What would the kit look like:
a. in red light?
b.in green light?
c.in blue light?
In all three cases . . .
-- the shirt appears black, since there's no yellow light shining on it;
-- the shorts appear to have the same color as the light shining on them.
WILL MARK BRAINLIEST!
WORTH A LOT OF POINTS!
Answer:
Explanation:
I think it’s b
The normal boiling point of methanol is 64.5 °C. What is the
boiling point in Kelvin?
Answer:
337.5 K or 337.65 K
Explanation:
Celsius to Kelvin
Celsius + 273 = Kelvin
64.5 + 273 = 337.5 K
OR
Celsius to Kelvin
Celsius + 273.15 = Kelvin
64.5 + 273.15 = 337.15 K
Any of the answer can be written. To convert Celsius to kelvin, 273.15 is to be added to the temperature in Celsius. But usually, 273 is added instead of 273.15
Hope this answer helps you.
How often should cardio exercises be performed? A. Never B. Three to five times a month C. Three to five times a week D. Three to five times a day
Answer:
C. Three to five time a week.
Explanation:
A 60 kg man jumps down from a 0.8 m table. What is the speed when he
hits the ground? ( Take g= 10 m/s2)
Answer: Speed = 4 m/s
Explanation:
The parameters given are
Mass M = 60 kg
Height h = 0.8 m
Acceleration due to gravity g= 10 m/s2
Before the man jumps, he will be experiencing potential energy at the top of the table.
P.E = mgh
Substitute all the parameters into the formula
P.E = 60 × 9.8 × 0.8
P.E = 470.4 J
As he jumped from the table and hit the ground, the whole P.E will be converted to kinetic energy according to conservative of energy.
When hitting the ground,
K.E = P.E
Where K.E = 1/2mv^2
Substitute m and 470.4 into the formula
470.4 = 1/2 × 60 × V^2
V^2 = 470.4/30
V^2 = 15.68
V = square root (15.68)
V = 3.959 m/s
Therefore, the speed of the man when hitting the ground is approximately 4 m/s
What is the basic premise of the universal gravitational law? Question 7 options: Each object in the universe that has mass attracts every other object that has mass. The motion of an object in a circular path is kept along that path due to gravitational force. The force of an object is equal to the mass of the object multiplied by its acceleration. The acceleration of an object in freefall will always be 9.8 meters per second squared, due to gravitational pull.
The correct answer is A. Each object in the universe that has mass attracts every other object that has mass.
Explanation:
The gravitational law proposed by Newton explains how the gravitational force works. The basic idea or premise in this law is that the gravitational law exists in all the universe, and occurs with all objects that have a mass. This includes the fact all objects or particles that have a mass attract all other objects with mass but this is also influenced by the distance between the objects, and the masses of each object. In this way, the gravitational force is equal to the gravitational constant multiplied by the mass of the two objects and divided by the distance between the objects.
Answer:
A. Each object in the universe that has mass attracts every other object that has mass.
Explanation:
The universal law of gravitation states that every object in the universe that has mass attracts every other object in the universe that has mass. The force increases as the mass of the objects increases, and decreases as the objects become further and further apart.
A blue textbook will _____
green light. A) emit B) reflect C) absorb D) transmit
Answer:
C. Absorb
Blue textbooks are blue because they absorb every color except blue and reflect the blue color so you see the blue. That is why the textbook is blue so it absorbs every color except blue.
Explanation:
