What occurrence defines the end of the protostar phase of a star's life and the start of the main-sequence phase?

if the mass of the marble is 0.025kg, and you assume that on the first drop of your roller coaster (height=8cm) the marble is falling at exactly the rate of gravity (9.

A square current loop 4.9 cm on each side carries a 480 mA current. The loop is in a 0.60 T uniform magnetic field. The axis of the loop, perpendicular to the plane of the loop, is 30° away from the field direction.

How do you use the periodic table to recall the ionic charge of an alkali metal, and alkaline earth metal, or aluminum

What is the mass defect of lithium? Assume the following: Atomic number of lithium = 3 Atomic mass of lithium = 7.0144 atomic mass units. Mass of 1 proton = 1.0073 atomic mass units. Mass of 1 neutron = 1.0087 atomic mass units. (A) 0.

How do darwin finches illistrate the thoery of natural selection

Explain how inertia and the shape of a loop counteract the force of gravity to keep riders from falling out when a roller coaster goes through a loop traveling upside down

Which is not a characteristic of an ideal fluid? A. high viscosity B. laminar flow C. constant density D. constant pressure

What type of weather system brings calm, clear weather?

What is one reason supporting genetic modifications to food

Match the description of how heat is transferred to the proper term. A. When two things in contact with each other transfer heat Convection B. When a liquid or gas carries heat Conduction C. When waves transfer heat Radiation