How long does it take for light to travel from Earth to Mars?

How long does it take for light to travel from Earth to Mars?

All communication between Mars and Earth goes through satellites. Because of the distance, there is a substantial delay. As communication signals travel at the speed of light, this means that it can take between 3 and 22 minutes for the information to reach the other end, so a phone call would not be practical.

What species is a jelly fish?

All jellyfish are Cnidaria, an animal phylum that contains jellies, sea anemones, and corals, among others. There are more than 10,000 species of Cnidaria, and less than 4,000 of these are Medusazoa—those animals we think of as jellyfish. Those 4,000 jellyfish can be divided into four different groups.

Do whales have a nose?

They have nostrils called blowholes. Over millions of years of evoloution whales and dolphins nostrils moved to the top of their head. This allows them to breath by surfacing instead of them sticking their whole head out of the water. The first thing a newborn dolphin must do is to go to the surface to breathe.

How many hoops are used in a game of croquet?

Croquet can be played by two or four players. The object of the game is to hit your ball(s) through the course of six hoops in the right sequence in each direction and finish by hitting them against the centre peg. The side which completes the course first with both balls wins.

Who Invented the Passenger Elevator?

The man who solved the elevator safety problem, making skyscrapers possible, was Elisha Otis, who is generally known as the inventor of the modern elevator. In 1852, Otis came up with a design that had a safety “brake.”

How much is 20 pounds of quarters worth?

The first surprise is that a pound of dimes and a pound of quarters are essentially worth the same amount of money, namely $20, a coincidence on two levels that isn’t so well-known.

Is the piano a string instrument?

There are also problems with classifying certain keyboard instruments. For example, the piano has strings, but they are struck by hammers, so it is not clear whether it should be classified as a string instrument or a percussion instrument.

How much cheese does the average American eat in a year?

Using the latest data from the U.S. Department of Agriculture, the CSPI reports, “Since 1970, we’ve gone from 8 pounds per person per year to 23 pounds.” Of cheese. We are each, on average, eating 23 pounds a year of cheese.