Uji Kendiri 1.3 1. Tentukan hubungan antara daya-daya yang terlibat dalam setiap situasi di bawah jika daya-daya itu adalah dalam
keadaan keseimbangan.
Determine the relationship between the forces involved in each situation below if the forces are in equilibrium state.
(a) Budak lelaki duduk di kerusi.
(b) Belon udara panas pegun.
Boy sitting on the chair.
Hot air balloon stays at stationary
Normal, R
Daya apungan/Buoyant force, F
Berat Weight, w
Berat/Weight, w
Penyelesaian/ Solution:
Penyelesaian/ Solution:
(C) Kapal terbang bergerak pada ketinggian malar (d) Budak lelaki mengayuh basikal pada halaju malar.
dongan bola
hou cucling at constant velocity

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.