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.

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.

Can animals see colors?

To see in full colour as we know it, humans use three cones – red, blue and green. However cats and dogs only have blue and green cones. This means they have a much more muted perception of colour, which is akin to colour blindness in humans.

What product had the first barcode stamped on it?

George J. Laurer is considered the inventor of U.P.C. or Uniform Product Code, which was invented in 1973. In June 1974, the first U.P.C. scanner was installed at a Marsh’s supermarket in Troy, Ohio. The first product to have a barcode included was a packet of Wrigley’s Gum.

When was glass first made?

Archaeologists have found evidence of man-made glass which dates back to 4000 BC; this took the form of glazes used for coating stone beads. It was not until 1500 BC that the first hollow glass container was made by covering a sand core with a layer of molten glass.

What animal smells like popcorn?

Binturongs smell like popcorn. Or popcorn smells like binturongs. I guess it depends on your perspective. Either way, when I stopped by the enclosure of the large, blue-grey bearcat at the San Diego Zoo last month, the warm, buttery scent was unmistakable.

What was the first human organ to be successfully transplanted?

Organ Transplant History. 1954: On December 23, the first successful living-related kidney transplant led by Dr. Joseph Murray and Dr. David Hume at Brigham Hospital in Boston: A kidney was transplanted from Ronald Herrick into his identical twin, Richard.

What kind of animal is Goofy?

Goofy is a funny animal cartoon character created in 1932 at Walt Disney Productions. Goofy is a tall, anthropomorphic dog, and typically wears a turtle neck and vest, with pants, shoes, white gloves, and a tall hat originally designed as a rumpled fedora.