Without the protection of certain parts of the "sphere" of Earth, the would be in great danger. A: Magnetosphere

B: Hydrosphere

C: Lithosphere

D: Atmosphere

E: Biosphere

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

(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?