Which of the following is a complex machine? 1) piano 2) bottle opener 3) shoehorn 4) doorknob

A nuclear weapon in which enormous energy is released

A sealed jar has 0.20 moles of gas at a pressure of 300.12 kpa and a temperature of 229 k. what is the volume of the jar?

What are the three hallmarks of science

How do vibration produce sound?

A bowling ball has a mass of 6 kilograms. A tennis has a mass of 0.06 kilogram. How much inertia does the bowling ball have compared to the tennis ball?

If the force applied to an object increases while the mass stays the same, the acceleration of the object.

Planetary nebulae are characterized by an emission spectrum consisting of Balmer (hydrogen) emission lines and a pair of strong emission lines at 4959˚A and 5007˚A that were quite mysterious when first seen.

What is the mass of oxygen in an oxygen tank at 20 C if the tank has a volume of 0.20 m3 and the oxygen pressure in the tank is 4.0 105 N/m2 (mass of one mole of one mole of oxygen is 16 g and the universal gas constant is 8.

What is one advantage infrared astronomy has over visible light astronomy?

A 60-kg runner raises his center of mass approximately 0.5 m with each step. Although his leg muscles act as a spring, recapturing the energy each time his feet touch down, there's an average 10% loss with each compression.