Which of the following is a difference between sound and light?

1. Humans can only detect light, not sound

2. Only light travels as a wave

3. Sound travels faster than light

4. Only light can travel through space, not sound

An object vibrates 12 times in 4 seconds what is its frequency and period

If an experiment disproves a scientist's hypothesis, what should the scientist do next?

A car has a mass of 900 kg and a truck has a mass of 1800 kg. In which of the following situations would they have the same momentum? A car has a mass of 900 kg and a truck has a mass of 1800 kg.

Explain how ethene is a feedstock for making ethanol.

Which changes to observed time and length occur when objects approach the speed of light? Time moves slower and length increases. Time moves slower and length decreases. Time moves faster and length increases. Time moves faster and length decreases.

A bus travels 300 km south along a straight path with an average velocity of 85 km/h to the south. The bus stops for 22 minutes. Then it travels 220 km south with an average velocity of 78 km/h to the south.

In what way does varying the length of the string change the vibration

A 1200 kg car moving at 7.8 m/s collides with a stationary car of mass 1500 kg. if the two vehicles lock together, what is their combined velocity immediately after the collision?

Which have more kinetic energy a 100g ball, a 200g ball, or a 500g ball explain

An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine the power output and the rate of heat rejection.