The first periodic table of elements Mendeleev created contained how many elements

Humans consume resources and produce waste. As the human population grows, global consumption of resources and waste production increases. The waste generated often collects in dumping grounds called landfills.

Are many common foods we eat more likely to be acidic or basic

How could you convert the length of an ant from centimeters to kilometers. How long is an ant in kilometers?

0.05 kg bullet collides and sticks to a 2.5 kg stationary block suspended from a string. the bullet and block swings to a maximum height of 12 cm. what was the initial speed of the bullet?

Which material is malleable and conducts electricity? A. wood B. oil C. ice D. metal

During combustion, a fuel's electromagnetic energy is converted into thermal energy.

Explain why glucose is important to a cell

4. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.