1) what's the recommend amount of uv protection that sunglasses should provide?

a. 50%

b. 75%

c. 80%

d. 100%2) one way to ensure good sleep hygiene is to change your bedtime frequently. truefalse

Why wheat flour is usually passed near a magnet before being packed?

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Two objects with masses m1 and m2 are located a distance d apart. If their masses are each doubled and the separation between them is reduced to d/2, by what factor does the gravitational force between them change?

Name on contact force and one field force acting on you right now

Examine the layers of rock. Identify and explain which layer contains the youngest fossils.

A series of steps that allows someone to conduct an experiment are called a

A coach is hitting pop flies to the outfielders. if the baseball (m = 145 g) stays in contact with the bat for 0.04 s and leaves the bat with a speed of 50 m/s, what is the average force acting on the ball?

The two major ways to transfer charge between two objects are

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A solid sphere of radius R has a total charge Q distributed evenly throughout its volume. What fraction of the total charge is located inside a radius R/2?