The resistance to the motion of electrons through different types of materals is n decreasing order, dry so·most so uderground water, and ron ore. how can this knowledge and the measurement of the charge reaching the detector per unit time identity what type of material is under check all that apply.

a. more electrons will reach the detector from iron than from dry soil.
b. the electrons reaching the detector are affected very little by what's under the surface.
c. the detector will get more electric charge if the resistance to flow is less, and resistance is related to the type of material
d. the electrons reaching the detector will carry water with them if water is under the surface

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

Select the correct answer. what does the process of natural selection involve?

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size