Answer:
В. An object with mechanical energy is always able to perform work.
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body and it is measured in Joules.
Mathematically, it is given by the formula;
Mechanical energy = G.P.E + K.E
Hence, the true statement is that an object with mechanical energy is always able to perform work.
Answer:
a.3.20m
b.0.45cm
Explanation:
a. Equation for minima is defined as:
Given , and :
#Substitute our variable values in the minima equation to obtain :
#draw a triangle to find the relationship between and .
#where
Hence the screen is 3.20m from the split.
b. To find the closest minima for green(the fourth min will give you the smallest distance)
#Like with a above, the minima equation will be defined as:
, where given that it's the minima with the smallest distance.
#we then use to calculate =4.5cm
Then from the equation subtract from :
Hence, the distance is 0.45cm
The law of moments is when an object is balanced; the sum of cloclwise moments is equal to the sum of counter clockwise moments. I hope this helped, Enjoy the rest of your day
The answer is C. Mountains. I hope this helped!