How long does it take for light from a star that is 8 light-years away to reach earth?

A.

8 earth minutes

B.

16 earth minutes

C.

8 earth years

D.

16 earth years

Oxygen-18 is a naturally-occurring, stable isotope and is commonly used is scientific studies as a tracer. Using the periodic table, explain the difference between oxygen-18 and oxygen-16.

Why does it take several minutes for the smell of a freshly cut lemon to be detectable on the opposite side of the kitchen?

Why is there less fore between two apples than between the earth and one apple?

Light is bent as it enters a tank of water from air. It is bent to a greater angle when it goes from air to a glass block. Predict what will happen as a beam of light is shone on a diamond. A) Light would be bent less than it would in water.

Tony made 14 liters of lemonade for a party. His guests drank 9500 mL of the lemonade. After the party Tony had mL of lemonade left over.

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?

What's are some forms of chemical energy