Which statement about magnetic poles is accurate?

question 5 options:

a. opposite magnetic poles attract, while like magnetic poles repel.

b. opposite magnetic poles repel, while like magnetic poles attract.

c. same magnetic poles attract, while different magnetic poles attract

d, same magnetic poles attract, while different magnetic poles repel.

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

Hydrogen and helium are both members of?