This important element contains 26 electrons and rust in the presence of air.

A. Aluminum

B. iron

C. magnesium

D. silver

My little brother makes a ramp to push his toy dump truck to his sandbox

Which of the following is true about all of the outer planets? A. Much of the material in these planets is solid. B. The surface of these planets is rocky. C. They have many moons. D. They all rotate in the same direction.

What is the mass of an object that needs a 4000 N to accelerate it at a rate of 10m/sec2

Using the equation for the distance between fringes, Δy = xλ d, complete the following. (a) Calculate the distance (in cm) between fringes for 694 nm light falling on double slits separated by 0.0850 mm, located 4.00 m from a screen.

Which of the following states of matter has a definite volume? A. liquids only B. solids only C. liquids and gases only D. solids and liquids only

In the virtual lab, calculations were made of the predicted diffraction angle, using the formula θ ≈ StartFraction lambda over L EndFraction.

What trends were seen in Mendeleev's periodic table?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.