Which of these is a unit of heat?

a. joule

b. degree celsius

c. kelvin

d. tesla

Which of the following statements is a true statement about the use of nuclear energy as an alternative energy source? O A. Production of electricity from nuclear energy does not produce dangerous radioactive waste products. O B.

What is the equation for an inelastic collision

A train is accelerating at a rate of 2 m/s. If its initial velocity is 20 m/s, what is its velocity after 30 seconds? Given: Equation: Plug in: Answer:

Equipment used to measure force

A 82 kg football player encounters a 427 kg m/s impulse. How much does the players velocity change?

What does the speed of sound depend on? A. Medium that the sound travels through B. Acoustics C. Frequency of the sound D. Loudness of the sound

Which of these is not a source of the shock waves that lead to protostars?

Which kind of information is known about a person if that person's DNA is in a database? A. how old the person is B. where the person was probably born C. some diseases the person might have D. whether the person is likely to commit a crime

A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm. A group of students investigated how the colour of the blanket affected how much infrared radiation is absorbed

Students asked to measure the temperature of a reaction beaker recorded the following temperatures. 103.7°C, 108.4°C, 105.8°C, 104.6°C The actual temperature is 105.1°C. Which measurement is the most precise