Kenneth ran a marathon (26.2 miles) in 5.5 hours. What was Kenneth's average speed? (Round your answer to the nearest tenth.)

Last question of the day Predict what will happen to the sun, the solar system, and the milky way in billions of years

Which statement correctly describes the nucleus of the atom? The nucleus of the atom contains the electrons. The nucleus of the atom is mostly empty space. The nucleus of the atom surrounds the center of the atom.

Check your calendar and find out how many days each year has? Different types of calendars, such as Islamic calendar, Lunar calendar, Gregorian calendar have different numbers of days and months in a year.

An electromagnetic wave is composed of electrical and magnetic energy. true or false

Consider a wave generator that produces 10 pulses per second. The speed of the waves is 3m/s, what is the wavelength?

You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought gravity was just a lot weaker up there.

What is the half life of each of these radioactive isotopes? a radioactive isotope decreased to one-fourth its original amount in 18 months.

What would be the most likely charge of an ion formed from an atom with the electron configuration: 1s22s22p5 +1 -1 +3 -3

How many degrees is in the centre of the sun

How to write 0.23000 in scientific notation