What is the lowest level of organization to include both biotic and abiotic factors?

A rectangular wooden block of weight W floats with exactly one-half of its volume below the waterline. Masses are stacked on top of the block until the top of the block is level with the waterline. This requires 20 g of mass.

How many times more does a proton weigh than an electron

What is radioactive decay

Find the voltage across and power absorbed by the 25 ohm resistor.

Which of the following is the correct SI unit to use in measuring the mass of a boulder?

Calculate the kinetic energy of a 4 kg object traveling at 16 m/s

10 What produces electromagnetic radiation?

At this output power, how long would it take an 89 kg cyclist (including the mass of his bike) to climb the famed 1100-m-high alpe d'huez mountain stage? neglect any friction.

What part of an atom is responsible for producing magnetic fields

A bar meter is used to measure