Every sample of a pure substance has exactly the same composition and the same properties. true or false

A. At what frequency would an inductor and a capacitor have the same reactance? b. What would the reactance be? c. Show that this frequency would be the natural frequency of an oscillating circuit with the same L and C.

All the forces within a closed system are a) internal b) external c) due to gravity d) angular

This is due by 11:59 PM tonight. A horizontal force F1 (of magnitude 20 N) is applied to a box that is at rest on a level surface. Even with F1 applied, the box does not slide.

Which organ system includes the esophagus, pancreas, and large intestine? A) Digestive B) Excretory C) Integumentary D) Lymphatic

2) Which car is accelerating? A) a car that is unmoving B) a car that rounds a curve at a constant speed C) a car that travels in straight line at a constant speed D) a car that is set to a constant speed of 60 miles per hour

What process is used when the sun transfers light to plants A. conduction B. radiation C. convection D. all of these

Which wave characteristic has the unit hertz

A stretched spring has 5184 J of elastic potential energy and a spring constant of 16,200 N/m. What is the displacement of the spring?

A block of mass 1.3 kg is resting at the base of a frictionless ramp. A bullet of mass 50 g is traveling parallel to the ramp surface at 250 m/s. It collides with the block, enters it, and exits the other side at 100 m/s.

Metals are good thermal conductors - that is, when there is a temperature difference across their ends, they transfer energy very efficiently from the higher temperature end to the lower temperature end.