Check my answers: the voltage across a 10-ohm resistor carrying 3 amps must be? i got 30 volts-v=? , i=3 amps, r= 16 ohm. v= 30 amps * 10 ohm=30 volts
a 4-ohm resistor is connected in parallel with a 6 ohm resistor. what is the total resistance of this pair of resistors? i got 6.87 ohms
rt=r1+r2/r1+r2 = rt= 4 ohm+6ohm/4 ohm+6ohm= rt=.25+.167/.25+.167=6.87
how i got .25 and .167 its from the decimal 1/4=.25 and 1/6=.167
the power dissipated in a 4-ohm resistor carrying 3 amps is? i wasn't too sure about this one, but i got 12 watts this is how i did it: power=current * voltage, power= 4 ohm* 3 amps= 12 watts
what is a device that produces ac electricity? why does our power grid use ac electricity? (for the first part i got an alternator and for the second part i don't understand)

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r