Why are some rocks smooth and others rough?

An echocardiogram uses 4.4 mhz ultrasound to measure blood flow in the aorta. the blood is moving away from the probe at 1.5 m/s.

Find the direction of the net electric force exerted on a charge Q, located at the center of the square, for the following arrangement of charge: the two positive charges are on the top corners, and the two negative charges are on the bottom corners.

A restoring force of magnitude F acts on a system with a displacement of magnitude x. In which of the following cases will the system undergo simple harmonic motion? A) FB) F sin xC) F x2D) F xE) F 1/x

What is the analogy for explaining there are infinite universes, but not infinite possibilities? something like you count between 3 and 2, but none of those numbers will be 1, right?

A bug lands on a windshielf wiper. Explain why the bug is more likely to be dislodged when the wipers are turned on at the high rather than low setting.

How much force is required to pull a spring 3.0 cm from its equilibrium position if the spring constant is 3.7 x 103 n/m?

When did our Solar System begin to form? When did our Solar System begin to form? 5 million years ago 5000 years ago 5 trillion years ago 5 billion years ago

Which describes how radiation moves? radiation moves from a cooler object to a warmer object radiation moves from a warmer object to a cooler object radiation moves from a warm object to an object of the same temperature radiation moves from a cool

Why does the closed top of a convertible bulge when the car is riding along a highway? Why does the closed top of a convertible bulge when the car is riding along a highway? The air pressure is greater outside the car than inside.

Is a white shirt cooler or warmer in the sunlight?