Which organnele is like the brain of the cell

Which of the following is true A. If the sum of the external forces on an object is zero, then the object must be in equilibrium. B. If the sum of the external torques on an object is zero, then the sum of the external forces on it must also be zero.

Identify the conditions for an elastic collision in a closed system. CHECK ALL THAT APPLY

What is the chemical formula for chalk

Explain sound waves. sources of sound waves and the experiment to demonstrate sound waves

Ana poured equal amounts of water into four bowls. Then she put the bowls in the sun for different amounts of time. She recorded the temperature of the water in each bowl after its time was up. Which bowl should have the warmest water?

A planet is discovered orbiting around a star in the galaxy Andromeda at four times the distance from the star as Earth is from the Sun.

Measurements of how orbital speeds depend on distance from the center of our galaxy tell us that stars in the outskirts of the galaxy. True or False

Identify what is required to calculate the atomic number and atomic mass of an element

What device is used to measure the current in a circuit

A lever allows a 35 N load to be lifted with a force of 7 N. What is the mechanical advantage of the lever?