Answer: 91.4 J
Explanation:
Kinetic energy is the energy possessed by a body due to virtue of its motion.
K.E. = 0.5 m v²
Mass of the continent is given, m = 1.819 × 10²¹ kg
Side of the block of continent, s = 4150 km = 4150000 m
Depth of the block of continent, d = 38 km = 38000 m
(Mass = density × volume
m = 2780 kg/m³× (4150 × 10³ m)²× 38 × 10³ m = 1.819 × 10²¹ kg)
The continent is moving at the rate of, v = 1 cm /year = 0.01 m / 31556926 s = 3.17 × 10⁻¹⁰ m/s
⇒ K.E. = 0.5 × 1.819 × 10²¹ kg × (3.17 × 10⁻¹⁰ m/s)²= 91.4 J
Hence, mass of the continent has 91.4 J of kinetic energy.
Answer:5.45X10^3m
Explanation:So use the formula,v= fλ
3X10^8=5.5X10^4λ what Im saying is divide both and u should get 5454.54m but do sig figs to get answer
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:
Archimedes' Principle
Explanation:
Its because Archimedes' Principle states "that the buoyant force on an object is equal to the weight of the fluid displaced by the object.... If you want to know the buoyant force on an object, you only need to determine the weight of the fluid displaced by the object."
