The coefficients in the following reaction 2Al2O3 → 4Al + 3O2 add up to 7. True or False?

Why are scientific theories modified, but seldom discarded?

The difference between sound and vibration

In a simple electric circuit, the current in resistor is measured as (2.50+_0.05) mA. the resistor is marked as having a value of 4.7ohm+_2 % if these values were used to calculate the power dissipated in the in the resistor.

Which of the following is not a receptor pair according to the opponent process theory? A. red versus green B. yellow versus blue C. black versus white D. yellow versus red

Why do u think you usually can't feel or notice the movement of the continents

You measure the magnetic field of a long, current-carrying wire to be B is equal to start fraction 50 times mu naught over pi end fraction at a distance of r = 7.5 cm. How much current is running through the wire?

In any food chain or web, the original source of energy is

Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?

It is 5.5 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h (which uses up energy at the rate of 700 W), or you could walk it leisurely at 3.0 km/h (which uses energy at 290 W).