Why do electromagnetic waves not require a medium for travel? a. because electromagnetic waves travel too fast for stationary particles to move with them b. because electromagnetic waves transmit energy without compressing the particles of the medium c. because electromagnetic waves generate their own particles for compression and use these for movement d. because electromagnetic waves move in two-dimensional space, the particles of mediums exist in 3-d space?

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Heterogeneous mixture with larger particles that never settle is