Why is the Big Bang a theory and not a fact

You have a mass of hot water at 90oC and twice the mass of cool water at 10oC. the hot and cold water are mixed together. will the final temperature be midway between 10 and 90oC, closer to 90oC, or closer to 10oC?

A wave has a speed of 30 m/sec and a wavelength of 3 meters. Calculate its frequency.

What does variable mean in science?

When discussing valve train components, Tech A says stamped rocker arms are very strong and may be used in high-horsepower engines. Tech B says forged rocker arms are used in high-torque, high-horsepower applications. Who is correct?

An industrial process makes calcium oxide by decomposing calcium carbonate. Which of the following is NOT needed to calculate the mass of calcium oxide that can be produced from 4.

A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3 m from the source?

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach

Exoplanets (planets outside our solar system) are an active area of modern research. Suppose you read an article stating that there is a newly discovered planetary system with three planets.

A car with a mass 1200 kg accelerates at 1.89 m/s2. What is the total force exerted by the car on the road (answer in N to two decimal places) ?