Answer:
The law of conservation of energy is the preserved form of energy.
Option (1) is correct that is the total amount of energy in the universe remains constant.Because energy is conserved.
Option (3) is correct since, it is conserved so, it can not be created or destroyed.
Option (4) Energy can change from one type to another like mechanical to electrical energy but it will remain conserved.
Option (5) is correct because in closed, isolated system energy is conserved.
Answer:
The result is a vector perpendicular to the xy plane: 23.38 k
Explanation:
The cross product of two vectors r and s is defined only in three-dimensional space and is denoted by r × s. The cross product is defined by the formula:
r × s =║r║·║s║· Sin θ· n
where θ is the angle between r and s in the plane containing them, ‖r‖ and ‖s‖ are the magnitudes of vectors r and s, and n is a unit vector perpendicular to the plane containing a and b in the direction given by the right-hand rule.
So, the result is:
r × s = 4.40 * 7.45 * Sin (134.5°) k = 23.38 k
The person travels 2.93 (it’s a repeating decimal so 2.933333 but round it to whatever it says round it to) feet per second