How are electromagnetic waves different from mechanical waves? (2 points) Electromagnetic waves are all high frequency; mechanical waves are all low frequency.
Electromagnetic waves can travel through a vacuum; mechanical waves require a medium.
Electromagnetic waves are visible; mechanical waves are invisible.
Electromagnetic waves always reflect; mechanical waves always refract.

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.

Which of the following would not diffuse through the plasma membrane by means of simple diffusion? 1 oxygen 2 glucose 3 a steroid hormone 4 a lipid soluble vitamin

Which activity is an innate behavior