Aparticular x-ray photon has initial energy of 60 kev when it enters the body. this photon transmits through 30 cm of soft tissue and exits the body. calculate its energy (in kev) after it has exited the body.

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward