Iron has a density of 7.9 g/cm3. How much mass is in a 10 cm3 sample of iron?

Calculate the force of earth's gravity on a spacecraft 2.00 earth radii above the earth's surface if its mass is 1600 kg.

For which one of the following situations will the path length equal the magnitude of the displacement? a A ball on the end of a string is moving in a vertical circle. b A toy train is traveling around a circular track.

What is the speed of a bobsled whose distance-time graph indicates that it traveled 116m in 29s?

A spaceship takes off vertically from rest with an acceleration of 30.0 m/s 2. What magnitude of force F is exerted on a 53.0 kg astronaut during takeoff?

In which of the following does thermal conduction happen fastest? A. liquid B. Solid C. Gas D. vacuum

When blue light of wavelength 450 nm falls on a single slit, the first dark bands on either side of center are separated by 45.0

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration? 4 m/s2 in negative acceleration 4 m/s2 in positive acceleration 9 m/s2 in positive acceleration 9 m/s2 in negative acceleration

Two students walk in the same direction along a straight path at a constant speed-one at 0.90 m/s and the other at 1.90 m/s. •How far would the students have to walk so that the faster student arrives 5.50 min before the slower student? A.) 460s B.

During the process of accretion, each planet-in-the-making, or proto-planet, grew in size and mass. The amount of gravity for the proto-planets is best represented by which graph?

Theories and Laws. • How are they alike? • How are they different? • Can you explain why scientific theories will change over time? • Give an example of a scientific theory that has changed.