The diagram shows an electromagnet made with copper wire, a steel nail, and a 1.5 V battery. Which change would make this electromagnet weaker?
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BATTERY
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A. Wrap more coils around the nail.
B. Replace the steel nail with a wooden stick.
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C. Reverse the direction of the battery.
D. Replace the battery with a 3 V battery,

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer