Explain why the rusting of an iron bar decreases the strength of the bar

Which of the choices below is one of the primary gases found in the atmosphere?

A magnetic field produced by a current has the following characteristic (s) A. their field can be turned on and off B. they can have their strength changed C. their direction could be reversed D. All of the above E. none of the above

7. What are the characteristics of a gas? O no definite shape but a definite volume O no definite shape or definite volume O a definite shape but no definite volume O a definite volume and definite shape

Carrying out a procedure designed to test a hypothesis is a

Which phase of matter do scientists ignore the forces of attraction between particles? a. solid b. liquid c. gas

1. Strzała o masie 20 g tuż po wystrzale ma prędkość 50 m/s. Oblicz pracę wykonaną przez zawodniczkę. Ile wynosi energia potencjalna sprężystości napiętej cięciwy? 2. Na trampolinę o współczynniku sprężystości k=2 kN/m stanął zawodnik o masie 80 kg.

Two small plastic spheres between them has magnitude 0.22 N. What is the charge on each sphere is one the other? Explain whether it can be determined from the information give, whether the charges are positive or negative.

If it has enough kinetic energy, a moleculeat the surface of the Earth can escape the Earth's gravitation. The acceleration of gravity is 9.8 m/s2, and the Boltzmanns' constant is 1.38066*10-23 J/K.

True or False. Alcohol is toxic to most fruit flies, but fruit flies that metabolize alcohol quickly survive alcohol exposure better than normal metabolizers.

Aerobic exercise is exercise where oxygen is not present. Question options: True False