b) intervalul de timp t3 in care prin fata sa trece vagonul urmator
Sper că am ajutat!
Answer:
1. The force of the shelf holding the book up.
Explanation:
The free body diagram of the book is as follows:
1 - The weight of the book towards downwards
2 - The normal force that the shelf exerts on the book towards upwards.
Since the book is at rest, these two forces are equal to each other and according to Newton's Third Law the reaction force to the force of gravity is equal but opposite to the weight of the book. This reaction force is the one that holds the book up on the shelf.
Answer:
Picasso’s artistic achievements were in large part the result of his contribution to help bring the Nazi' devastating casual bombing and Spanish civil war in Guernica to the world's attention through his paintings.
F is the focal length of the lens. A positive f indicates a converging optical device, like a convex lens or a concave mirror.
Choice A
Answer:
Part a)
f = 1911.5 Hz
Part b)
Explanation:
Here the source and observer both are moving towards each other
so we know that the apparent frequency is given as
here we know that
now we will have
Part b)
Apparent wavelength is given by the formula
here we will have
