A 6.0 nC charge is placed at the origin and a second charge -6 nC is placed on the x-axis at x = 0.30 m. What is the electric field at x = +0.15 m?

A copper wire has a resistance of 0.75 Ω at 20.0ºC, and an iron wire has a resistance of 0.525 Ω at the same temperature. At what temperature are their resistances equal? Material Coefficient   α = 1/oC 2 Copper 3.9 x 10-3 Iron 5.0 x 10-3   

A circuit is set up with a batter connected to a capacitor. As the battery voltage increases, the charge density on the capacitor plates

Do I need a text book?

I have my Hands on Lab kit or will be getting it soon. I understand the first lab is due by the end of week 1.

Two capacitors, C1 = 4.34 μF and C2 = 13.8 μF, are connected in parallel, and the resulting combination is connected to a 9.00-V battery. What is the equivalent capacitance? The charge on each capacitor in parallel will be The electric potential on each capacitor in parallel will be  

What would be the equivalent square of a treatment portal that is 7.8 cm x 12.6 cm non-isocentrically? 

The relative radiosensitivity of a tumor can be increased by:

You are treating a rectal patient on a Varian 2300 linear accelerator with a calculated SSD of 100 cm.  Your patient’s AP/PA separation is 36 cm and his lateral separations are 42 cm. The tumor is located 19 cm deep from his anterior surface.  The doctor has written a prescription for 28 fractions to a dose of 5040 cGy and a prescription for a boost of 3 fractions to a dose of 540 cGy.  The daily monitor units for the AP portal are 58, RT lateral portal 73 and the LT lateral portal 78. Your patient is beginning his treatment on Thursday 12/1/2019.  Your patient will miss his treatment on 12/9 due to previous obligations. How many fractions has your patient received after treatment delivered on 12/12?

The dosimetrist that is preparing brachytherapy sources for a prostate seeding is receiving a dose 0.5 mRem at a distance of 3 centimeters from the source. At what distance should she be in order to reduce her dose by one quarter?