Tyra designed an experiment to demonstrate an annular solar eclipse. The steps of the experiment are listed below.

.
Place a light bulb on a stand.
• Stick a pencil into a small styrofoam ball.
• Switch on the light bulb and darken the room.
• Stand facing the light bulb.
• Hold the pencil with styrofoam ball very close to the eye.
• Observe the light bulb without moving the eye and styrofoam ball.
Tyra's experiment has a flaw. Which of these statements best describes a method to
correct the flaw in Tyra's experiment?

A. Move eye towards the right to observe the light bulb.

B. Hold the styrofoam ball at arm's length from the eye.

C. Place the light bulb behind the observer

D. Clamp the styrofoam ball behind the light bulb.

I think it’s B but I’m not sure

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.