An alpha particle

1) is identical to a helium nucleus

2) can penetrate a sheet of aluminum

3) has a negative charge

4) all of these

Three identical massless rods are each acted on by two or more forces, all perpendicular to the rods and all equal in magnitude (with a force of magnitude F). None of these rods is in static equilibrium.

Daniel has a sample of pure copper its massive is 89.6 grams (g) and its volume is 10 cubic centimeters (cm3) what's the density of the sample

Muscles make up ore than __ of a person body? a. 10 b. 25 c40 d. 75

What is the difference between: first moment of area and second moment of area?

A 600 N astronaut travels to an asteroid where the gravitational force is one-hundredth that of Earth. What is the astronaut's weight on the asteroid?

A force of 5 N accelerates an object. The object's mass is 50 g. What is the acceleration of the object? (Formula: F=ma)

Which is a legacy of the enlightenment?

An instrument for observing very small objects is a. micrometer spectroscope microscope magnoscope

Who was copernicus and what have he done for science?

The state of matter that has particles that slide by one another