Sebuah cermin cembung memiliki jari-jari kelengkungan 30 cm. sebuah benda diletakkan pada jarak 30 cm di depan cermin. hitunglah letak bayangan benda dan pembesaran bayangan!

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above