A car slows down as it comes up to a stop sign. Is its acceleration positive or negative?

Two cyclists who weigh the same and have identical bicycles ride up the same mountain, both starting at the same time. Joe rides straight up the mountain, and Bob rides up the longer road that has a lower grade. Joe gets to the top before Bob.

Explain why the universe must be an isolated system to obey the law of conservation of mass.

What is difference between series and parallel circuit?

Which of the following describes how the current in a circuit can be increased? Select all that apply. A. increase the voltage and the resistance B. increase the voltage while keeping the resistance constant C.

Astronomers have discovered a new planet called "Xandar" beyond the orbit of Pluto (No, not really but I need a fake planet for this problem!). It has a satellite called "Jim" that orbits with a period of 12.9 days at a distance of 72,600 km.

Describe the factors that form deep currents

A comet is cruising through the solar system at a speed of 50000 kilometers per hour for 4 hours time. What is the total distance traveled by the comet during this time in kilometers, miles, and light years?

A gas in a closed container is heated with 12J of energy, causing the lid of the container to rise 3m with 5N of force. What is the total change in energy?

What are illuminated objects?

During one year a population of blue jays has zero population growth. which must be true about the blue jay population at the end of the year compared to the beginning of the year?