Which example is a naturally occurring magnet

A a nail

B a piece of iron

C aluminum

D earth

What would you use to stop itches from a bite

Which type of mine involves digging tunnels and shafts deep underground? Question 19 options: 1) strip mine 2) openpit mine 3) subsurface mine 4) smelting

What is the change in internal energy if 60 j of heat are added to a system and the system does 40 j of work on its surroundings? use u = q - w.

A typical student listening attentively to a physics lecture has a heat output of 100 w. how much heat energy does a class of 170 physics students release into a lecture hall over the course of a 50 min lecture?

Two or more simple machines working together make up a

When a sound wave first enters the auricle, which part of the ear does it travel through on its way to the eardrum? auditory nerve cochlea hammer ear canal

Isla made a diagram to compare X-rays and radio waves. A venn diagram with two intersecting circles. The one on the left is labeled x-rays and the one on the right is labeled radio waves.

What is the magnitude of electrostatic force of attraction between two alpha particles separated at a distance 5.3x10-11m? (1 apha particle = change of proton)

A block of material of volume 20cm³ and density of 2.5gcm³suspended from a spring balance with half of the volume of the block immersed in water. What is the reading of the spring balance?

What are changes in temperature, duration of daylight, and the presence of a predator all examples of? a. Behavior c. Stimuli b. Reflex d. Instinct