Which of the following is an example of a pure substance?

A. a sample of oxygen gas

B. a solution of sugar water

c. a mixture of pasta and sauce

D. an alloy of iron and carbon

What is the force required to move a load 50kg through a distance of 1000cm in 5 seconds

A projectile is shot from the surface of earth by means of a very powerful cannon. if the projectile reaches a height of 100.0 km above earth's surface, what was the speed of the projectile when it left the cannon?

Describe 3 uses of radioactivity isotopes

The proton from the decay of the neutron is moving at 0.75 c. An observer on the proton measures the radius of the electron as 10 fermi. A Fermi is 10-15 m. What is the radius of the electron measured by someone on the electron?

Over the course of a martian year, what are the ranges of the rms speeds of the co2 molecules.

In which state of matter are particles held together but still able to move around each other? A. gas B liquid C. vapor D. ice

a film of transparent material 120 nm thick and having refractive index 1.25 is placed on a glass sheet having refractive index 1.50. (A) Determine the longest wavelength of light that interferes destructively when reflected from the film.

Hat is the kinetic energy of a 1.0-kg billiard ball that moves at 5.0 m/s? A. 5.0 J B. 6.5 J C. 10.0 J D. 12.5 J

Linus builds an electrical circuit with a battery and with wires that carry the current. As the battery weakens, the current also weakens. How does this affect the magnetic field around the wires? 1The field gets stronger. 2The field gets weaker.

Ignoring details associated with friction, extra forces exerted by arm and leg muscles, and other factors, we can consider a pole vault as the conversion of an athlete's running kinetic energy to gravitational potential energy.