A piston absorbs 25 J of heat from its surroundings while expanding from 0.0003 m² to 0.0006 m3 at a constant pressure of 1.0 x 105 Pa. What are the
correct values for heat and work for the piston?
A. Q = -25 J, W = +30 J
B. Q = +25 J, W = -30 J
O
O
C. Q = +25 J, W = +30 J
O D. Q = -25 J, W = -30 J

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?

How does changing the frequency affect the energy of the wave?

Acaregiver's love, affection, and acceptance are considered conditional if they're given only when the child is well-behaved or meets set expectations. t or f