A60 w lightbulb is on for 24 hours. a stereo with a power of 150 w is on for 2
hours. which statement correctly compares the energy used by these
devices?
o
a. they use the same amount of energy.
o
b. the lightbulb uses 4,104,000 j more than the stereo.
o
c. the lightbulb uses 2,080,000 j less than the stereo
o
d. the lightbulb uses 5,184,000 j more than the stereo.
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Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Acar moves a distance of 50.0 km west, followed by a distance of 64.9 km north what was the magnitude of the displacement of the car, in units of kilometers?

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.