An element's atomic number is 45. How many protons would an atom of this element have?

A diver initially moving horizontally with speed v dives dives offthe edge of a vertical cliff and lands in the water a distance dfrom the base of the cliff.

Which one of the following processes is performed by the endocrine system Excretion of hormones from the body Breakdown of hormones into simpler molecules Secretion of hormones from cells Transport of hormones to muscles

What change of state occurs during vaporization? O liquid to gas gas to liquid solid to liquid liquid to solid N

What fundimental force is responsible for the repulsion between two positively charged particles?

Which statements correctly characterize a lunar eclipse? Select all that apply. A.) It occurs when Earth is between the sun and the moon. B.) It results in a path of totality. C.) It is shorter during totality than a solar eclipse. D.

Select the correct answer from each drop-down Two magnets are placed as shown in the 00 В D between the poles B and . And the force of between the poles A and DIS Reset Next

Two main pieces of evidence support the big bang theory and the idea that our universe is continually expanding: Doppler shift and cosmic background radiation. Explain how these phenomena provide evidence of the expansion of the universe.

How was bohr atomic model similar to Rutherford's model

A rigid container filled with a gas is placed in ice. What will happen to the pressure of the gas? And what will happen to the volume?

A man is sitting on a 20 m height building and his mass is 50 kg. Calculate the mechanical energy.