Jamal blasts an air-horn to start a race. Lewis hears the horn from his house 274 meters away. Given that sound travels through air at 340 m/s, how long did it take the sound to travel from Jamal to Lewis?

440 s

0.81 s

1.2 s

66 s

Does a cell ever reach equilibrium

Select the correct answer. What effect would adding water (H2O) have on this reaction over time? (NH4) 2CO3 (s) ⇌ 2NH3 (g) + CO2 (g) + H2O (g) A. The concentration of products would increase, and the concentration of reactants would decrease. B.

Could a mixture be made up of only elements and no compounds. if so explain

Where are the oldest rocks found?

Students will explain, distinguish the difference between the 4 states of matter

What factor causes the seasons? A: Rotation of earth's axis B: The tilt of earth's axis with respect to the sun C: The appearance of the moon D: An eclipse

A golfer on a level fairway hits a ball at an angle of 21° to the horizontal that travels 99 yd before striking the ground. He then hits another ball from the same spot with the same speed, but at a different angle. This ball also travels 99 yd.

What's earths most precious element?

An example of forced convection is the movement of hot air by a fan. true or false?

An object has a kinetic energy of 233 J and a momentum of magnitude 20.4 kg·m/s. Find the speed and the mass of the object.