Contrast physical changes with chemical changes

A jogger travels due south and in the process his displacement vector has a magnitude of 4.68 km. he then jogs due west what is the magnitude of the displacement vector in the due west direction if the magnitude of the total displacement vector is 7.

A geologist is observing the side of a mountain for evidence of erosion when a large rock begins to accelerate down the mountainside. Using his knowledge of the laws of physics, what change should he conclude caused the rock to accelerate? A.

True or false the number of times a machine multipies effort force is a mechanical atlantis

To determine the specific heat of an object, a student heats it to 100 degrees C in boiling water. She then places the 110 g object in a 172 g aluminum calorimeter containing 148 g of water.

Rose quartz is pink and smoky quartz is gray. Which of the following statements is true? A. They have the same impurities. B. Color is the best way to identify a mineral. C. They will have the same color streak. D.

Two children are bouncing small rubber balls. One child simply drops a ball. At the same time, the second child throws a ball downward so that it has an initial speed of 10 m/s. What is the acceleration of each ball while in motion?

If a girl makes a homemade sling shot that requires a force of 14 N to pull it's pebble (.08kg) into place at 0.1 m from the resting position of the sling shot, the maximum velocity of the pebble will be

A weightlifter raises a 200-kg barbell with an acceleration of 3 m/s^2. How much force does the weightlifter use to raise the barbell?

How does the law of inertia relate to how the planets in our solar system revolve around the sun?

Metals combine easily with nonmetals. true or false