Recent content by blackout85

Is there a way to go about it mathematically without graphing?

A certain sample carries a current of 4 A when the potential difference is 2V and a current of 10 A when the potential difference is 4V. This sample: A) obeys Ohm law B) has a resistance of 0.5 ohms at 1V C) has a resistance of 2.5 ohms at 1V D) has a resistance of 2.5 ohms at 2V E) does...

Homework Statement A 10-ohm resistor has a constant current. If 1200 C of charge flow through it in 4 minutes what is the value of the current? A) 3.0 A B) 5.0 A C) 11 A D) 15 A E) 20 A The Attempt at a Solution I get B as an answer. I=(Q/t). I= 1200C/ (4 * 60) = 5.0 A The book...

A current of 0.3 A is passed through a lamp for 2 minutes using a 6 V power supply. The electrical energy dissipated by this lamp during the two minutes is: a) 1.8 J b) 12 J c) 20J d) 36 J e) 216 J If someone could just help me to start off that would be great. The main equations I...

The answer then would have to be zero. Am I right to think that

The work in joules required to carry a 6.0 C charge from a 5.0 V equipotential surface to a 6.0V equipotential surface and back again to the 5.0V surface is: A) 0 B) 1.2 X 10^-5 C) 3.0 X 10^-5 D) 6.0 X 10^-5 E) 6.0X10^-6 Can someone please explain how to start off doing this problem. I...

I need to determine whether these certain chemicals are polar or not: Beta- sitosterol Methyl cinnamate Lapachol Ethyl p-hydroxy cinnamate Betulic acid 3,4,5- trihydroxy-7-methoxy flavone Veratric acid p-anixic acid Many of them are difficult, If there is a website that...

Could someone help me?

Sorry, I won't double post It says that the holding force for the swing is horizontal. I have the two holding forces going up on by free body diagram, the weight force going down, and the 100N force horizontal.

question A 160N child sits on a light swing and is pulled back and held with a horizontal force of 100N. The tension force of each of the two supporting ropes is: work: The tension force of the Ta and Tb must support the weight of the child and the horizontal force of 100N. so: Ta +...

physics I rechecked it If a wheel turns with a constant rotational speed: each point on its rim moves with a constant translational velocity each point on its rim moves with a constant translational acceleration the wheel turns through equal angles in equal times the angle through which...

First questionThree identical balls, with masses M, 2M, and 3M are fastened to a massless rod of length L as shown. The rotational inertia about the left end of the rod is: Thats the layout below. Would calculus be needed in this problem (intergration) because then I am in trouble. I know the...

Torque Homework Statement A 160 N child sit on a light swing and is pulled back and held with a horizontal force 100 N. The tension force of each of the two supporting ropes is: A uniform plank is supported by two equal 120N forces at X and Y at both ends of the plank.The support at X is...

If a wheel is turning at 3.0 rads/s, the time it takes to complete one revolution is about: 3.0 rads/s X 1 revolution/6.28 rads = .477 revolutions/s I just need to get the number of seconds to complete one revolution. Please explain how to go about this just step wise. Thank you. The...

For the first problem I just want the answer in seconds, not seconds/revolutions I put 3600 seconds because it is the amount of time for the minute hand to make one full revolution around the clock