Answer: 249 seconds
Explanation:
Speed of bike = 2.52 m/s
Distance = 628 m
Time taken = ? ( let the unknown value be Z)
Recall that speed is the distance covered per unit time.
Hence, speed = Distance / Time taken
Time taken = Distance / speed
Z = 628m / 2.52 m/s
Z = 249.2 seconds (Round to nearest tenth i.e 249 seconds)
Thus, it takes 249 seconds for the girl to get to her friends house
Answer:
(neutral)
(protons)
(electrons)
Explanation:
Electrons have a negative charge (-) while protons have a positive (+) charge.
Atoms will usually be neutral, which means that there will be no charge.
For an atom to have a neutral charge, protons and electrons must "cancel" each other out. For this to happen, you need to have the same amount of each.
Positive will "cancel" out the negative.
Answer:
Explanation:
Power P = .5 mW = .5 x 10⁻³
P = Emax² / 2μo x c , c is velocity of light , μo is permeability of air .
Emax² = P x 2μo x c
= .5 x 10⁻³ x 2 x 4π x 10⁻⁷ x 3 x 10⁸
= 37.68 x 10⁻²
Emax = 6.14 x 10⁻¹
= .614 v/m
b) Bmax = Emax / c
= .614 / 3 x 10⁸
= .2046 x 10⁻⁸ T
= 20.46 x 10⁻¹⁰ T.
It is True.
<h3>What system removes and reduces heat caused by friction?</h3>
A mechanical brake applies a friction force to convert the kinetic energy of the vehicle into thermal energy which then dissipates into the atmosphere. Braking systems which don't use friction are referred to as regenerative braking systems (RBSs).
Slowing down is the most common way of controlling the speed of an article by restraining its movement. An item moving has motor energy and to halt the article this active energy should be taken out.
Eliminating the dynamic energy can be achieved by dispersing the energy to the air through grinding or by changing over it into one more type of energy. The most well-known sort of slowing down is a mechanical brake which hinders movement through rubbing brake cushions. A mechanical brake applies a grating power to change over the motor energy of the vehicle into nuclear power which then, at that point, disperses into the atmosphere.
Braking frameworks which don't utilize grinding are alluded to as regenerative slowing mechanisms (RBSs). In RBSs, the active energy is changed over into different types of valuable energy, which can be put away for sometime in the future, expanding eco-friendliness.
To learn more about regenerative braking systems from the given link
brainly.com/question/27799529
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Answer:
26.6 cm
Explanation:
We are given that
Spring constant=23.6 N/m
Force exert=6.28 N
We have to find the displacement.
We know that Hooke's law
Where k= Spring constant
x=Displacement
Using the formula
Then, we get
We know that 1 m=100 cm
Hence, the displacement =26.6 cm
