tính nhiệt lượng cần dùng để để 0,5kg băng từ -15 độ c tới khi tan hoàn toàn. biết nhiệt dung riêng là 2095j/kg, k là nhiệt chuyển pha là 333kj/kg

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.