Scientists discovered that stars in the universe are mostly composed of which elements? a. hydrogen and helium

b. hydrogen and oxygen

c. oxygen and nitrogen

d. helium and nitrogen

Two observers, one in northern Canada and the other in Australia, are looking at the Moon on the same day. The observer in Canada sees a Third Quarter Moon. What does the observer in Australia see?

Which of the followin are chemical changes? check all that apply: gasoline is evaporated, water is frozen, water is boiled, water is heated up, gasoline is burned

True, or False - Balanced Forces are equal forces acting on an object in opposite directions?

Calculate the kinetic energy in joules of a 1500 kg automobile moving at 19 m/s

What are some examples of action and reaction force

A spring tide can occur at what day and month?

For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement

Electric force is blank proportional to the amount of charge and blank proportional to the square of the distance between the charges

What happens in the gray zone between solid and liquid?

Which statement describes Newton's law of universal gravitation? Mass has hittle effect on gravity between objects. Gravity pushes objects away from Earth's center, Gravity does not act between Earth and the moon.