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...

Two sinusoidal waves travel in the same direction and have the same frequency. Thier amplitudes are Y1 and Y2. The smallest possible amplitude of the resultant wave is: a) Y1+Y2 and occurs if they are 180 degrees out of phase b) [Y1-Y2] and occurs if they are 180 degrees out of phase c) Y1 +...

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...