Identify the number of atoms on the reactant side of the chemical equation.

Fe2O3 + 3H2 → 2Fe + 3H2O

There are blank Fe (iron) atoms.

There are blank O (oxygen) atoms.

There are blank H (hydrogen) atoms.

In each pair, select a substance that is a better heat conductor. 1. copper wire / wood 3. water / iron 2. water / air 4. iron / glass

The drawing below shows two different types of pulley systems designed to lift a weight. In pulley system A, the end of the rope must be pulled 10 cm downward in order to raise the weight 10 cm upward.

What element are the cores of massive stars made of when a supernova occurs? a. silicon b. iron c. oxygen d. neon

Name the process scientists use to gain knowledge about the physical world

Work is done when a force that is applied to an object moves that object. If a panda bends and breaks a bamboo shoot, is that work? Question 1 options: A) Yes, the bamboo moves because of the force, so that is work.

you may slip if you step on a banana peel similarly you may find difficulty to walk on a slippery or a wet floor

If a puddle of water is frozen, do particles in the ice have kinetic energy

When is velocity high and acceleration low

A 10.0-µF capacitor is charged so that the potential difference between its plates is 10.0 V. A 5.0-µF capacitor is similarly charged so that the potential difference between its plates is 5.0 V.

Convert 540 degrees to revolution and radians