A swimmer can swim 4.00 km/h in still water. He heads south across a river that flows east at 2.00 km/h. The river is 0.500 km wide. His velocity wih respect to the ground is

What is the frequency of this wave? 1 100.00 0001 4 1 second

Which description matches up correctly with each type of particle? Alpha - no mass and no charge; beta - mass of 4 and charge of + 2; gamma - charge of - 1 and mass of 0 Alpha - mass of 0 and charge of - 1; beta - mass of 4 and charge of + 2;

Giant cave systems have formed through the reaction of acids with the that make up limestone.

1) the strength of an electromagnet can be increased by a. replacing the iron core with a steel core b. using coils of fewer turns on the electromagnet c. passing a larger current through the electromagnet d.

Mechanical advantage allows you to apply a force over a what distance to what the distance an object moves

A race car travels a circular track at an average rate of 135 mi/hr. The radius of the track is 0.450 miles. What is the centripetal acceleration of the car?

Between a substance and a mixture.

Two massive objects are fixed in position. A third object is placeddirectly between the first two at the position at which the totalgravitational force on the third object due to the two massiveobjects is zero.

Which statement best describes the magnetic properties of a material? Magnetic materials have many spinning, unpaired electrons Paired electrons of magnetic materials can move to other atoms Electrons of magnetic materials are strongly held by

when we examine the structures of the other terrestrial planets in our solar system, we see that their structure is similar to Earth's. Why do you think this is the case?