What does a refractory period prevent

Which of these is an example of a mechanical wave? A. the light of the Sun B. a car stuck in traffic C. the shaking from an earthquake D. X-rays from an X-ray machine at the dentist's office

A measurement that has both magnitude and direction

The weight of an object is the product of its mass, m, and the acceleration of gravity, g (whereg=9.8m/s2). If an object's mass ism=10. kg, what is its weight?

A bullet is fired at 660m/s and strikes a target 200.0 meters away. What is the time of the bullet's flight?

Two identical brass balls mounted on wooden posts initially have different amounts of charge, one + 5uC and the other + 19uC. the balls are allowed to touch and then are separated again. What is the final charge on each ball?

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?