I need a short answer : A block slides down a frictionless plane that makes an angle of 30 with the horizontal. What is the acceleration of the block ?

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer