What is another name for a pure substance?

A 55.6 kg ice skater is moving at 1.73 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.608 m around the pole. Find the force exerted by the rope on her arms.

How do you know that aliens don't exist

Mike believes that electricity can be made using a strong magnetic field and a coil of wire. which question would be appropriate for this statement

A wave in which the particles of the medium vibrate back and forth along the oath that the wave travels

In order to be considered scientific, evidence must be:

A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?

What is the result of a mutation during replication A: the strands are different B: the strands are identical c: the strands are broken D: the strands are continuous

What is ___ heating of a liquid__ gas to liquid

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine