Answer:
50% of unpolarised light passes through the first filter because, on average, 50% of the waves are aligned with the fiter's axis. Intensity is reduced by a factor 0.5.
The second filter then reduces the intensity by a factor cos²(θ)
Explanation:
Answer:
i think it is true
Explanation:
gravity dwn, your hand up and equal to grav
When you hold a book at rest, two forces act upon it: the downward gravitational force exerted by the Earth represented as -14ĵ N and the upward force exerted by your hand that equals 14 N, balancing out the weight of the book. These forces cancel each other out, keeping the book at rest as per Newton's Second Law.
When you hold a book at rest in your hand, two primary forces are acting upon it. These are the gravitational force, which is the book's weight pulling it downwards, and the force exerted by your hand, pushing upwards against the book. The downward gravitational force is caused by the earth's mass attracting the book's mass. This force is represented as -14ĵ N in physics. The force exerted by your hand counters this gravitational pull, allowing the book to remain at rest in your hand.
By Newton's second law, since the book is at rest, the net force acting on the book is zero. Meaning, the gravitational force and the force exerted by your hand cancel each other out. This is represented as: FPH + FEH = 0, where FPH is the force exerted by your hand and FEH is the force exerted by the Earth. With proper calculation, the force exerted by your hand on the book equals 14 N in the upward direction, counteracting the book's weight.
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False
Answer:
Explained
Explanation:
A graduated cylinder should be read at the top of the meniscus or the down of the meniscus purely depends upon the kind of liquid used. Water gives a concave meniscus whereas mercury gives a convex meniscus. The measurement should account for the meniscus. Measurement should be taken such that line we are reading must be even with center of the meniscus. From the above explanation we can
If it's Mercury in the graduated cylinder, then the statement is true.
If it's water in the graduated cylinder, then the statement is false.