When Pulsars were first discovered, they were a mystery. Some even thought they might be signals from aliens! In a paragraph, explain the basics of our current understanding of what a pulsar is and how such an object forms.

What is the equation for electrical work?

If a 2 ounce coin is dropped from the top of the washington monument and has a final velocity of 300 mph (miles per hour) when it hits the ground, how much kinetic energy will it have at that time?

It's time for santa to deliver his presents. assuming he delivers presents all over the world, he has to travel about 75,000,000 miles. if he travels east to west, he can use the time zones to make christmas day last 31 hours. what speed, in miles per hour, must santa fly to get all of his presents delivered?