Sharpening a pencil leaves behind pencil shavings. is sharpening a pencil a physical change or a chemical change

Runner is faster than Runner

A 261 kg motorcycle moves with a velocity of 4 m/s. What is its kinetic energy? Joules

Ilya and Anya each can run at a speed of 8.10 mph and walk at a speed of 3.90 mph. They set off together on a route of length 5.00 miles.

Describe how ultrasound and infrasound differ from normal sound, and give an example of each

A 0.20 kg air-track glider moving at 1.20 m/s bumps into a0.600 kg glider at rest. a) find the total kinetic energy after collision if the collision is elastic.

What is the special feature of the upper mantle?

What is the difference between weight and mass? mass and weight are both intrinsic properties of an object. if you multiply the mass of an object by the acceleration due to gravity, you will obtain the object's weight.

A skipper on a boat notices wave crests passing the anchor chain every 5 seconds. the skipper estimates the distance between crests is 15 m. what is the speed of the water waves?

According to this lesson, how many major ice ages has the earth undergone? A. 2 B. 3 C. 4 D. 5

In 2016, the city of Rio de Janeiro had a population density of 5377 people/km2. What was the population density of Rio in people per square meter?