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My fiancé and I were messing around about a week ago. We didn't have direct vaginal/penile intercourse though. I am on birth control, but I was on my first or second day of ovulation. He was unprotected. He went about an inch or two "inside" but it was more of a tease. We played around thrusting but he never actually penetated me. He was pre-cumming a lot and I was obviously very stimulated as well. I was on birth control but ovulating and I randomly started spotting a day or two ago. It's brownish and a very light flow! Like, extremely light. I was not expecting my period for another week and a half or so when this started. I have minor headaches and I want to eat everything. Could I be pregnant or could I just be having pre-menstural symptoms? Thanks.

Hi, I don't know how to get. It's supposedly .000014 I think? I just need help. Clearly please!

(a) How long must a 0.60 mm diameter aluminum wire be to have a 0.48 A current when connected to the terminals of a 1.5 V flashlight battery?

______ m

(b) What is the current if the wire is half this length?

Incorrect: Your answer is incorrect.

______ A

The starter motor of a car engine draws a current of 180 A from the battery. The copper wire to the motor is 5.0 mm in diameter and 1.2 m long. The starter motor runs for 0.70 s until the car engine starts.

(a) How much charge passes through the starter motor?

______ C

(b) How far does an electron travel along the wire while the starter motor is on?

______ mm

To what potential should you charge a 17.0 µF capacitor to store 14.0 J of energy?

Would someone help me by giving me a list of universities/colleges that will accept a student from Penn State with a degree in Industrial Engineering into an Industrial Design (AKA Product Design) without a Bachelor's in that specific major. I'm trying to help my boyfriend come up with a list of schools to call so that I can also apply to medical schools in the area. I'd appreciate the help.

principal quantum number (n) and angular momentum (l) of

3d _____ _____

2s _____ _____

4f _____ _____

The glass core of an optical fiber has an index of refraction 1.66. The index of refraction of the cladding is 1.46. What is the maximum angle a light ray can make with the wall of the core if it is to remain inside the fiber?

It's nighttime, and you've dropped your goggles into a swimming pool that is 3.2 m deep. If you hold a laser pointer 1.0 m above the edge of the pool, you can illuminate the goggles if the laser beam enters the water 2.2 m from the edge. How far are the goggles from the edge of the pool?

Consider the laser beam in The figure below, in which L = 4.2 m and H = 2.1 m. At what angle phi should the beam be aimed at the mirrored ceiling in order to hit the midpoint of the far wall?

http://www.webassign.net/knight/p23-9.gif

PLEASE HELP.

Consider the laser beam in The figure below, in which L = 4.2 m and H = 2.1 m. At what angle phi should the beam be aimed at the mirrored ceiling in order to hit the midpoint of the far wall?

http://www.webassign.net/knight/p23-9.gif

Please help, I was on a roll and then I got stuck.

A 2-kg object is falling downward with a constant speed of 8 meters per second. We conjecture (guess/assume) that there must be some other force acting on the object in addition to the downward pull of gravity. What can we say about this other force?

So the answer is "It has a magnitude of 20 N and points in the upward direction."

CAN SOMEONE PLEASE EXPLAIN WHY THIS IS THE ANSWER? And how the magnitude is equal to 20 N? I have my final this afternoon and I need to get these conceptual things down. Please please help. I always choose best answers and rate 5 stars! :(

Two train cars, with masses of 1000 kg and 4000 kg, are joined together with a heavy duty spring compressed between them. The cars roll together with negligible friction along a straight and level track at a speed of 20 m/s. The connection between cars is broken, and the spring pushes them apart. After being separated, the 1000-kg car rolls at a speed of 8 m/s. How fast is the 4000-kg car moving now?

The answer is 23 m/s but I have no idea how to get there. My final is at 12:20 today. Would someone PLEASE break this down for me? I'm desperate.

Hi, this question is giving me a hard time. I need someone to break it down for me please. I know the answer is 15 N. I just don't know how to get there. Make sure to clarify what each letter you use means please. Thanks so much.

A wooden cube of mass 6.5 kg with sides of length 0.2 meters is completely submerged in water (density 1000 kg/m^3) with its top at a depth of 0.5 meters. What is the magnitude of the net force on the cube? (Use g=10 m/s^2)

I know I'm supposed to use Archimedes Principle, but I don't quite understand it.

What will the pH in the titration of 50 mL of 0.10 M acetic acid (CH3COOH) when 25 mL of 0.10 M NaOH has been added at 25 degrees celsius. (Note that this is the half equivalence point; Ka for acetic acid is 1.8 x 10^-5)

I keep looking for help online but I just don't get it. Can someone please, very neatly, CLEARLY and nicely explain to me how to solve this problem? I'd really appreciate it. Thanks in advance.

Silicon has an enthalpy of fusion of 50.2 kJ/mol and a melting point of 1414 degrees celcius. What is the entropy of fusion for Silicon?

Alrighty, so I'm really stuck on this question.

Here's what (I think) I know:

I use Delta(G) = Delta(H) - (T)Delta(S)

I realized I'm looking for Delta S (entropy) so I don't know what to do there.

I can rearrange the formula into: Delta(S)=Delta(H) - Delta(G) / (T)

But I don't have Delta (G)...

Aaaand the reaction is NOT spontaneous.

Please help. Please. Thanks in advance.

The human ear canal is about 2.9 cm long. If it is regarded as a tube open at one end and closed at the eardrum, what is the fundamental frequency around which we would expect hearing to be most sensitive?

____kHz

A stretched string of length L is observed to vibrate in five equal segments when driven by a 709-Hz oscillator. What oscillator frequency will set up a standing wave so that the string vibrates in two segments?

____Hz

Suppose you hear a clap of thunder 15.8 s after seeing the associated lightning strike. The speed of light in air is 3.00 108 m/s.

(a) How far are you from the lightning strike? (The speed of sound waves in air is 343 m/s.)

km

(b) Do you need to know the value of the speed of light to answer?

Yes or No?

Explain Why.

An object-spring system oscillates with an amplitude of 2.8 cm. If the spring constant is 200 N/m and object has a mass of 0.50 kg, determine each of the following values.

(a) the mechanical energy of the system

____J

(b) the maximum speed of the object

____m/s

(c) the maximum acceleration of the object

____m/s2