Dalam waktu 20 sekon, baling-baling sebuah helikopter dapat mencapai putaran 6.000 rpm dari keadaan diam selama 20 sekon. sudut yang ditempuh masing-masing bilah pada baling-baling adalah

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger

True or false graphs must include scales that increase by the same amount

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?