1. A 12 kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s2. Find the force exerted by the rope. Show all your work.

What type of energy makes up most of the internal energy of a solid substance

Miguel is skipping rocks across the surface of a lake. After he throws it, each stone goes through the following motions: the stone moves toward the water the stone hits the surface of the water and bounces off gravity pulls the stone back toward

Which of the following contains the largest percentage of the Earth's water?

Which statement supports Newton's first law of motion? A. Planets can change the direction of their own orbital path. B. Planets with more inertia will not be impacted by the Sun's gravity. C.

The electric field inside each of the conductors that forms the capacitor in the defibrillator is zero. Which of the following reasons best explains why this is true?

What kind of tide is responsible for extreme tides

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