Seorang anak berada dalam sebuah mobil yang tengah melaju di jalan raya. Saat pandangannya diarahkan ke luar, dia melihat rumah-rumah, pohon-pohon bahkan orangorang yang berada di tepi jalan bergerak menjauh. Dia kemudian menyimpulkan bahwa
rumah, pohon dan orang sedang bergerak menjauhinya. Pada saat yang sama, seorang
anak yang berada di tepi jalan melihat bahwa mobil tersebut bergerak maju menjauhinya.
Siapakah yang benar?

(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?

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? a b c d

0.5 kg of silver increases temperature from 0 celsius to 7 celsius when heat is added how much heat energy produced this change in temperature