A cyclist leaves home and rides due east for a distance of 45 km. She returns home on the same bike path. If the entire trip takes 4 hrs, what is her average speed? What is her displacement?

Imagine that a tank is filled with water. The height of liquid column is 7 meters and the area is 1.5 square meters (m2). What's the force of gravity acting on the column of water?

How does the energy and motion of particles change as a substance is heated

The element chlorine has two naturally occurring isotopes. About 75% of chlorine isotopes are Cl35 and about 25% are Cl37. What is the average atomic mass of chlorine atoms? A. 35.45 amu B. 36.45 amu C. 37.45 amu D. 38.45 amu

23. The force required to accelerate a 2.0-kilogram mass at 4.0 meters per second is A) 6.0 N C) 8.0 N B) 2.0 N D) 16 N

Sound waves will travel slowest threw which medium

Light travels at a constant speed of 3.0*108 m/s in a vacuum. (a) It takes light about 1.3 seconds to travel from the Earth to the Moon. Estimate the distance of the Moon from the Earth's surface, in meters.

A car travels 1000m North and 2000m South. The total journey time is 300s. Calculate the distance traveled

Which elements on the periodic table have the lowest electronegativity? A. Elements on the bottom left B. Elements on the bottom right C. Elements on the top right D. Elements on the top left

An astronaut has become detached from her spaceship. She's floating in space holding a wrench. She's 50 m from her current location. How does she get back to the spaceship?

Which of these types of organisms is there more of on Earth? A. goat B. human C. dandelion D. bacterium