How do the units of work and power compare? a) The unit for work is a watt. The unit for power is a joule, which is a watt-second. b)The unit for work is a watt. The unit for power is a joule, which is a watt per second. c)The unit for work is a joule. The unit for power is a watt, which is a joule-second.
d)The unit for work is a joule. The unit for power is a watt, which is a joule per second.
Answers
Answer:
Option (d) is correct.
Explanation:
Work done is given by :
W = Fd, where F is force and d is displacement
Unit of work done :
The SI unit of force is Newton (N) and that of displacement is meter (m). So, the unit of work done is N-m. It is call Joule. It means that the unit of work done is Joule.
Power is given by rate at which the work is done. It is given by :
P = W/t, W is work done and t is time
Unit of power:
Unit of work is Joule (J) and that of time is second (s). It means that the unit of power is Watt and it is equal to Joule/second
Hence, the correct option is (d) "The unit for work is a joule. The unit for power is a watt, which is a joule per second".
Answer: The unit for work is a joule. The unit for power is a watt, which is a joule per second.
Explanation:
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The _______ the object, the _______ effect a force will have on its motion.A. softer; lessB. harder; lessC. lighter; lessD. heavier; less
What is the difference between the deviation and refraction?
The majority of visible stars are _____ stars.a. neutron b. red giant c. white dwarf d. main sequence
Answers
Answer:
D. It is no smaller than
Explanation:
The question is incomplete. These are all the options :
A. It is no larger than
B. It is
C. It is
D. It is no smaller than
To solve this problem, we have the data of :
Where ''m'' is the mass of the block
μ = 0.2
Where ''μ'' is the coefficient of static friction
If we want to find the magnitude of the force of static friction we need to use the following equation :
μ.
(I)
Where '''' is the normal force that the desk exerts on the block. Its magnitude is equal to the weight (because we suppose that the block rests horizontally on the desk).
The weight '''' can be calculated as :
Where ''m'' is the mass and ''g'' is the acceleration due to gravity.
The value of ''g'' is
The weight of the block is
Now, the weight is equal to the normal force ⇒
Using the equation (I) :
The correct option is D. It is no smaller than
b. switch circuits.
c. series circuits.
d. reversible circuits.
Answers
The correct answer to the question is: A) Parallel circuits.
EXPLANATION:
There are normally two types connection of circuit elements which are preferred for connection of electrical appliances.
Most of the circuits in home are connected to each other in a parallel way.
We know that the potential remains constant at every circuit elements for parallel connection. The potential drop across each circuit element will be different for series connection.
Due to the parallel connection, each circuit elements can be switched on or off separately.
Hence, most of the electrical circuits in home are connected in parallel way.
Option (a) is correct. The most of the circuits at home are the parallel circuits.
Further Explanation:
The normal wiring in the electrical appliances used in the household circuits are either done in series circuit or in a parallel circuit.
A series circuit is a circuit in which all the alliances are connected to one another in a linear manner. In series circuit, the current flowing through all the elements in a circuit remains the same but the voltage drop changes.
A parallel circuit is a circuit in which all the appliances are connected across the voltage source and therefore, the voltage drop across all the appliances remains the same.
The switching circuit and the reversible circuits are the circuits which make use of the several sensors and electronic adapters to control the circuit.
The parallel circuits are more advantageous over the other circuits because if any fault occurs in any one of the instrument or appliance, the whole circuit is not affected due to this. The rest of the circuit continues to work without any issue.
Thus, Option (a) is correct. The most of the circuits at home are the parallel circuits.
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Answer Details:
Grade: High School
Subject: Physics
Chapter: Electrical circuits
Keywords:
Parallel circuits, switch circuits, reversible circuits, series circuit, most of the circuits, household circuit, appliances, fault, not affected, current remains same, voltage drop across.
Answers
B.a quantity with both magnitude and direction
C.a magnitude described as a number
D.the magnitude of a value
Answers
Answers
Wellll . . . that's not a very easy way to do it. You'd still need
to figure out a way to measure the wavelength AND a way to
measure the frequency, so you won't find many engineers
actually trying to determine the wave speed by doing all of that.
But your statement is correct. The product of
(wavelength) times (frequency)
IS the speed of the wave.
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Answers
Answer:
repel each other
Explanation:
The magnitude of the charge of an electron is called... ... If a positively-charged glass rod is suspended so that it turns easily and another positively-charged glass rod is brought close to it, the two rods will... Repel each other.