Which reaction below represents a balanced, combustion chemical reaction?

A) C2H5OH + 3O2 → 2CO2 + 3H2O

B) C2H5OH + 3O2 → 2CO + 3H2O

C) Li2CO3 → Li2O + CO2

D) 2Li + 2H2O → 2LiOH + H2

Find the work w1 done on the block by the force of magnitude f1 = 65.0 n as the block moves from xi = - 3.00 cm to xf = 3.00 cm.

6. Your 60-watt light bulb is plugged into a 110-volt household outlet and left on for 3 hours. The utility company charges you $0.11 per kiloWatt•hr. Calculate the cost of such a mistake

The current in a hair dryer measures 21 amps. The resistance of the hair dryer is 8 ohms. What is the voltage?

Explain teen pregnancy from a sociological perspective.

A transverse wave on a string is described with the wave function y (x, t) = (0.59 cm) sin[ (1.80 m-1) x - (6.00 s-1) t]. (a) What is the wave velocity? (Enter the magnitude in m/s.

Why will marchers at the end of a long parade following a band be out of step with marchers nearer the band

How would you explain photosynthesis to a new student in class

If the abosolute of a gas is 600 k, the temperature in degrees Celsius is

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.

Which of the following is an example of convection? A. hot air rising and cooler air falling B. a hot object transferring heat to a cooler one C. a hot oven warming the air around it D. the rays of the Sun warming the earth