# Search results

1. ### Physics What career options that pay well can I get with a MS in Physics

hello, So I'm currently enrolled in an MS physics program thesis option.This is my first semester and I have realized that I will not pursue a PhD. I know my university offers ms in physics with a profesional track to which I will have to do some form of internship. In the case that I decide to...
2. ### Programs What are my options with a 2.54 physics major GPA?

HI, So I am graduating this Spring 2016 with an overall gpa of 2.91 and a major physics gpa of 2.54. I have talk with some of my physics professors about the possibilities of going to grad school, and they told me that it is up to me if I feel prepared, but based on my physics upper division...
3. ### I need help with some chem questions

Homework Statement You are given an impure sample of oxalic acid dihydrate (MW=126.068 g/mole) and asked to determine the percent of oxalic acid dihydrate present in the sample. You place 0.110 grams of the unknown sample in an Erlenmeyer flask and dissolve it in distilled water. Titration with...
4. ### Chem solution help!

Homework Statement 1.It takes 15 drops of solution A to react completely with 29 drops of solution B? Which equation below represents this reaction in the smallest whole number ratio? Assume that solution A and solution B have the same molarity. Remember that there is always a slight amount...
5. ### I need help with this homework problem

Homework Statement Find three positive numbers whose sum is 12 and the sum of whose squares is as small as possible. Homework Equations The Attempt at a Solution I don;t even know how to start this one, this is a section from partial derivatives on the max and mins. Please i need guidance...
6. ### Supersonic plane at mach 3

Homework Statement A supersonic plane flies at Mach 3 at an altitude of 20,000 m. A person on the ground sees the plane directly overhead. How much time passes the before she hears the sonic boom? Homework Equations f=fo(v+-vo/v-+vs) The Attempt at a Solution I don't really know...
7. ### Humphrey the Singing Whale and his mate Matilda.

Homework Statement Humphrey the Singing Whale and his mate Matilda swim toward each other, with Matilda swimming twice as fast as Humphrey. When Humphrey sings a note of a frequency 299 Hz. Maltida hears a frequency of 302 Hz. How fast is Humphrey swimming? (The speed of sound i sea water is...
8. ### Find the displacement.

Homework Statement y=0.2msin[(0.18rad/m)x+(90 rad/s)t - pi/4] What is the displacement at position x=0 and t=0? Homework Equations y(x,t)=Asin(kx-wt+phi) The Attempt at a Solution y=0.2m[0.18-90]=-0.199m the answer is -.141 m help?
9. ### Calculate the work done according to the graph.

Homework Statement Calculate the work done by a gas as it slowly expands from point A to point B on the pV diagram shown. Homework Equations Work=PΔV The Attempt at a Solution I calculatate the area under the curve and added both of the areas and I came up with 8*10^11 J and the...
10. ### Latent Heat and phase changes (difficult)

Homework Statement 10g of ice at 0 degrees Celcius is combined with 2 g of steam at 100 degrees Celcius. Find the final temperature of the resulting water. Homework Equations mc(Tf- Ti) m(Lf) or m (Li) The Attempt at a Solution ΔQice=mLice+mcwaterTf...
11. ### How much heat is released from water into ice.

Homework Statement How much heat is released when 250 g of water at 10 degrees celcius freezes into ice and cools to -10 degrees celcius? Homework Equations Q=mcΔt The Attempt at a Solution q= (250g)(4186)(283-273)=1.046*10^4 J than q=(250g)(2090)(263-283)=-1.045*10^4 J when i subtract...
12. ### How long will it take to fill a tank?

Homework Statement The water from a pipe flows into a tank of volume 180 m3. If the tank is initially empty, how long will it take to fill the tank? Homework Equations Q=vA v1=12m/s v2=22m/s A2=0.180982 m2 A1=0.3318 m2 The Attempt at a Solution This question is the third...
13. ### What is the pressure at 80 m below the surface of the ocean.

Homework Statement a) A sailor uses a rope to lower an iron ball of radius 30 cm a to a depth of 80 m below the surface of the ocean. What is the pressure (in atm) at that depth? b) Find the tension in the rope in the previous problem. The density of iron is 7.86 *103 Kg/m3. Homework...
14. ### A Christmas tree ball hangs from a hook in the ceiling.

Homework Statement A Christmas tree ball hangs from a hook in the ceiling. If the radius of the ball is 8 cm, find the period of the ball's oscillation as it swings on the hook. Homework Equations T=2pi*√L/g The Attempt at a Solution I tried pluggin the number and i'm way off...
15. ### What is the period of oscillation of the mass on the spring?

Homework Statement a)When a mass is attached to the end of a vertical spring, the spring is stretched down 3 cm. If the mass is pulled down a bit farther and then released, what is the period of oscillation of the mass on the spring? b) if the mass moves through its equilibrium position at 50...
16. ### Velocity of an apple before strikes the surface of a white dwarf.

Homework Statement An apple is dropped from a height of 12.8*10^6 m above the surface of the white dwarf. With what speed does the apple strike the surface of the white dwarf? M of white dwarf= 1.99*10^30 gravity of white dwarf= 3.29*10^6 Homework Equations Vf^2=Vi^2+2a(deltaX)...
17. ### A model of basal metabolism.

Homework Statement A model for the basal metabolism rate, in kcal/h, of a young man is given by the formula below, where t is the time in hours measured from 5:00 AM. What is the total basal metabolism of this man over a 24 hour period? R(t) = 85 - 0.18cos (Pi*t/12) ∫(0to24) R(t)dt= ...
18. ### Curious about something very very cool

Curious about something very very cool!! What is the difference between orbital velocity and angular velocity ?? because they both have different formulas but sometimes i had to rely on angular velocity to find the velocity found in v^@/r=GMm/r^2. But, does it really matter how do i find my...
19. ### Schools Prestige University or Regular accredited university?

Hi, I'm a undergraduate, major in physics at Weber State University in Utah. I have a very serious debate about whether is better for me to graduate here at Weber or make a transfer to the University of Florida (since am a resident in Florida). I began by getting my GED at seminole Sate...
20. ### Find final angular velocity.

Homework Statement A solid disk of radius 5m and mass 8 kg rotates clockwise at 1.5 rad/s. Above this disk is a hoop of radius 2.5 m and mass 8 kg , rotating counterclockwise at 3 rad/s. The hoop drops down onto the disk, and friction causes them to rotate together. Find the final velocity...
21. ### Find linear acceleration.

Homework Statement A uniform rod of mass M and lenght L is free to rotate about a pivot at the left end. It is released from rest in the horizontal position ( Thetha=90 degrees). What is the torque on the rod when it makes and angle (theta) with the vertical? What is the downward linear...
22. ### How long will it take for one cylinder to turn one revolution?

Homework Statement A cylinder is initially at rest, how long will it take for the cylinder to turn one revolution? Homework Equations (Theta)f=(Theta)i+(alpha)(deltaT) The Attempt at a Solution I know that the distance of the cylinder to turn one revolution is 2Pi over speed. My...
23. ### Question about a solid cylinder

Homework Statement A solid cylinder is pivoted about a frictionless axle as shown. A rope wrapped around the outer radius of 2 m exerts a downward force of 3N. A rope wrapped around the inner radius of 0.7 m exerts a force of 8 N to the right. The moment of inertia of the cylinder is 8 kg m^2...
24. ### Ellastic collision problem.

Homework Statement Mass m1=7kg with speed of 3 m/s collides at the origin with a mass m2= 8 kg that has a speed of 5 m/s, (at an angle of 33 degree in the 2nd qwuadrant). After the collision , mass 2 remains at rest at the origin. Find the final velocity of mass 1 (magnitude and direction)...
25. ### Find final velocity and kinetic energy lost.

Homework Statement Mass m1=6kg traveling with velocity 4 m/s collides with mass m2=16kg traveling with velocity 3m/s in the direction shown (m2= is at an angle of 60degress). If the two masses stick together, find the final velocity of the combined masses, and the kinetic energy lost...
26. ### A spring is compressed by 90 cm

Homework Statement A spring is compressed by 90 cm at the bottom of a frictionless hill of height 18m. the spring is realeased and propels a 2 kg block over the hill. At the top of the hill, the block's speed is 6 m/s. Find the force constant (spring constant) of the spring. Homework...
27. ### Problem about an sphere.

Homework Statement An 7.60-cm-diameter, 400 sphere is released from rest at the top of a 1.90-m-long, 16.0 incline. It rolls, without slipping, to the bottom. What is the sphere's angular velocity at the bottom of the incline? What fraction of its kinetic energy is rotational? Homework...
28. ### Kinetic energy and momentum (Conceptual Question)

Homework Statement The two toy cars shown in the figure, with masses as given in the figure, are ready to race. Both cars begin from rest. For each question, state whether the correct answer is car A, car B, or whether the two cars have equal values for the parameter in question. For the...
29. ### What is the speed of each marble immediately after the collision?

Homework Statement A 43.0 marble moving at 1.90 strikes a 30.0 marble at rest. What is the speed of each marble immediately after the collision? (vfx)1=? (vfx)2=? Homework Equations v2f=2 m1 v1 / (m1 + m2) The Attempt at a Solution I tried using the equation above to get...
30. ### Find the tensions t1 and t2.

Homework Statement Find the tensions T1 and T2. The 18 kg mass is at rest. T1 is attached to a vertical wall horizontally and T2 is attached to a horizontal wall vertically with T1 at and angle of 50 degree from the ceiling. Homework Equations Sum of all forces x T2-T1cos(theta)=0...