12. We've learned that velocity is a vector quanuty.

Is force also a vector quantity? Why or

why not?

Who invented the clamping mechanism that made elevators significantly safer and led to dramatic changes in cities worldwide?

What direction does secondary waves move

A sound wave moving through the air causes particles in the air to move. If air particles are moving, why doesn't this motion create a breeze?

How do we know that pulsars are neutron stars?

Why do electromagnetic waves not require a medium for travel? A) because electromagnetic waves travel too fast for stationary particles to move with them B) because electromagnetic waves transmit energy without compressing the particles of the

A type of fault where the hanging wall slides upward

How was dyslexia treated in the past and how is dyslexia treated today?

The work of Charles Kuen Kao is likely to have been most influenced by the work of which of the following scientists? A. Galileo Galilei B. Christian Doppler C. Sir Isaac Newton D. Ibn al-Haytham

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car acceleration?

Why can crevasses in glaciers only be 50 meters deep? A. Plastic flow occurs below that depth. B. Glaciers cannot be thicker that 50 Meters. C. Surges prevent plastic flow below that depth. D. Basal slip occurs below that depth.