Classify the chemical equations as being balanced or not balanced.

CaO + 3C → CaC2 + CO

Na + H2O → 2NaOH + H2

4Fe + O2 → 2Fe2O3

2Mg + O2 → 2MgO

Aaron Agin nodded off while driving home from play practice this past Sunday evening. His 1500-kg car hit a series of guardrails while moving at 19.8 m/s. The first guard rail delivered a resistive impulse of 5700 N•s.

Which of the following best describes magnetic fields? A. Magnetic fields need a conductor. B. Magnetic fields are always found in insulators. C. Magnetic fields have north and south magnetic poles. D. Magnetic fields must have only positive charges.

Which specialized science would you consult before cultivating your new field or farm for better and profitable yields? A. biotechnology B. biochemistry C. integrated pest management D. soil science

Describe how lighting is just like you walking across a carpet and getting shocked

Which medium would sound travel the fastest? water a steel bar or nitrogen gas

The amplitude of oscillation is the maximum distance between the oscillating weight and the equilibrium position.

A runner makes one lap around a 200m track of 25s. What were the runners average speed and average velocity?

Which change occurs when an atom undergoes alpha decay?

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is able to rotate the ball at the rate of 8.44 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.

A moving small car has a head-on collision with a large stationary truck 7.3 times the mass of the car. Which statement is true about the direction of the car after the collision if the collision is elastic?