A sound wave has a frequency of 247 Hz and a wavelength of 1.4 m. What is the speed of the sound wave in air?

When the kinetic energy of an object changes, energy is transferred to or from the object.

Consider two concentric conducting spheres. The outer sphere is hollow and initially has a charge Q1 = - 10Q deposited on it. The inner sphere is solid and has a charge Q 2 = + 1Q on it. 1) How much charge is on the outer surface

Which of the following are usually not shown in a chemical equation? A. reactants B. physical state C. products D. catalysts

alex goes shopping. he buys 2 hats that hat cost the same price and a scarfthat cost $17. total he spent $35. how much did each hat cost

Which best describes the materials that make up an electrical cord? 1. a metallic conductor lacking free electrons surrounded by a rubber insulator with free electrons 2.

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells