# Math/Physics

206,302 results, page 31

### physics

find a unit vector parallel to the resultant of vectors : A=2i^+j^-k^& B=3i^-2j^+2k^

### Physics

Why are electrons allowed to fall on a crystal plate for diffraction ?

### Physics 30

The circuit has two resistors? V= 22V R= 27 Komega R=? I= 12mA

### physics

three resistors are connected in parallel R1=10, R2=50, R3=25.what is the equivalent resistance

### physics

An astronaut has a mass of 60kg.what is her weight here on earth

### physics

a car starts from rest and accelerates at 6m/s^2.how far does it travel in 3s?

### physics

How does a vaccum flask minimize heat change with surrounding

### Physics

An electric field with constant magnitude and direction is said to be?

### physics

What are the charges on and the potential difference across each capacitor in the figure if V = 13.2 V?

### Physics

A man walks 3km E and then 4km N. What is his resultant displacement?

### Physics HW Plz help

What is the frequency of a blue light with a wavelength of 487nm?

### physics

what is the heat capacity of a gold ring that has a mass of 7.00g

### physics

prove that I=square root of (I^2avarage). using I=Iosin(wt)

### Physics

A streetlight hanging above a road has what type of engrgy?

### physics

Which idea did Isaac Newton’s experiments with light support?

### Physics

For what values of "a" and "b"will the vectors 2i^_3j^_k^ and ai^+bj^_2k^ be parallel to each other?

### PHYSICS

A Car Of Mass 280kg Moving With A Velocity Of 30m/s

### Physics

Calculate the λSWL for molybdenum, when the accelerating potential is 15 kV

### Physics

Mass=2.20 T=10 Friction=0.400 Determine the acceleration when x=0.400m

### physics

you are moving at 12m/s towards a mirror,what is the speed of your image?

### Honors Physics

How do you determine the mass of fuel in a semi truck?

### Physics

Write 2.38x10 to the 6th power in standard notation

### Physics

How far does a runner travel if they maintain a speed of 8.5 m/s for 240 s?

### physics

Does drift velocity depend upon the area of conductor?

### physics

What is the kinetic energy of a 15 kg dog that is running at a speed of 8.7 m/s (about 19 mi/h)?

### physics

What is the acceleration of a 10-N freely falling object with no air resistance?

### Physics

Joseph drives his car 10 km [E20 °S] then 25 km[N]. What is his total displacement?

### Physics

Determine the relative density of a regular shaped object

### Physics

When 20 kJ of heat is removed from 1.2 kg of ice originally at -15 C, what is the new temperature?

### Ap physics

Determine the mass of the earth from the known period and the distance of the moon

### physics

What is the rotational speed of the hour hand on a clock? -----rev/s

### physics

What is the rotational speed of the hour hand on a clock? -----rev/s

### physics

What is the period (in seconds) of a simple pendulum 62.0 cm. long, on the earth?

### Physics

Hi, do you know how angular velocity relates to a "tight spiral" in football?

### physics

State the factors that affect the speed and the rotation of the motor

### Physics

Describe a vibration that is not periodic. I'm not sure how to answer this! Please help?!

### Physics

How long does it take for sound to travel around the world ?

### physics

determine the velocity of a charge that push by the 16 volts source

### physics

a body of mass 2 kg moving with a speed of 10 m/s find its momentum

### Physics

Why the household appliances starts / runs as soon as we switch them on

### physics

describe the shape of the graph made and discuss its significance.

### physics

Is the motion of the rider for each angle of inclination uniformly accelerated? Why or why not?

### Physics

A coil of wire has a resistance of 31.8Ω at 28 °C and 55.6Ω at 53 °C. What is the temperature coefficient of resistivity?

### physics

How much positive and negative charge is there in a cup of water

### modern physics

Calculate the commutator [ p, e^ik.x ] where the function e^ik.x may be expanded as: e^ik.x = ∑infinite,n=0 (ik.x^n/n!)

### physics

from newton's second law of motion derive the formulae F=ma

### physics

What is the energy of a photon of yellow light with a frequency of 5.14 Ã— 1014 Hz?

### Physics

What does it mean when the position vs. time graph is below the x-axis?

### Physics

What is the polar notation for a vector that points from the origin to the point (0,5.00) ?

### physics

if the velocity of wave is 0.15m/s and the frequency is 20Hz, what is the wavelength?

### Physics

Name five distinct disciplines of physical sciences

### Physics

Find analytically the resultant of the forces shown below: Where: F1 = 20 kg (4,4) F2 = 15 kg (-5,5) F3 = 5 kg (-2,-2) F4 = 10 kg (3,-3)

### Physics

What is the pressure on a swimmer 10meters below the surface of a lake?

### Physics

What is the acceleration due to gravity 'g' on the moon if 'g' is 10m/s² on the earth?

### math

The National Association for Women in Science asked recent high school grads if they had taken certain science classes. Of those surveyed, 32 said they had taken physics, 51 said they had taken chemistry and 15 said they had taken both. Ten said they had taken neither. How ...

### MATH

The National Association for Women in Science asked recent high school grads if they had taken certain science classes. Of those surveyed, 23 said they had taken physics, 47 said they had taken chemistry and 5 said they had taken both. Seven said they had taken neither. How ...

### Math

Can somebody help me out here. I want to know why I am good with math problems but I don't get word problems until it is made out of a equation. The reason is that you have learned math as procedures and facts...math as a form of thinking, or analysis, hasn't sunk into your ...

### physics

Hi I did a physics lab where we hung one spring with several different masses and found its K value, then hung another spring with several different masses and found its K value, then we joined both the springs together and hung several masses on it, and then found the K value...

### physics

light travels from ethanol intro crown glass. what's the brewster angle in this situation? illustrate your answer with a light ray diagram. what's the signifcance of this angle of incidence? n1=1.36for ethanol nR=1.52 for crown glass tanangleB=nR/ni =1.52/1.36 =1.12 (48.2 ...

### Re: Physics/Math

A sphere of mass 2.7 x 10^-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 41 degrees with the vertical. Find the magnitude of the push provided by the breeze and Find the tension in the cord. you have a ...

### physics

I'm having a really hard time with this physics problem...not really sure where to begin or which equation to use....please help: You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 ...

### math

Hello. I'd like to find free videos for math on the Internet? By using Youtube can I search math videos for elementary school students? Would you let me know a good way to use free videos about various subjects on-line. Thank you.

### math math math

35 is what percent of 200

### Physics

This is a theoretical question, ignore the numbers. A 205-kg log is pulled up and to the right on a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0 degrees with respect to the horizontal. The coefficient of kinetic friction ...

### Math/Physics

I am unsure of what exactly I am looking for in this problem... One of the highlights of the Calaveras Fair, besides the bullfrog jumping contest, is the watermelon seed spitting contest. The seed spitting is being done in the direction of s ⃗=5i ⃗+j ⃗. The ...

### Physics/Math

A machine carries a 5.0 kg package from an initial position of di = (0.50 m) i + (0.75 m) j + (0.20 m) k at t = 0 to a final position of df = (8.00 m) i + (11.0 m) j + (7.40 m) k at t = 13 s. The constant force applied by the machine on the package is F = (2.00 N) i + (4.00 N...

### math

Help! I am gettting a C in math and I am so cofussed! How do I study better but have fun while I do it? I love math, I take it as a game, I take the #'s and use their equations. I know you might not like problem solving q?, but try to get a tutor & I know u can do it. GOOD ...

### math fractions

•math - Ms. Sue, Sunday, November 16, 2014 at 12:39pm 12 •math - bob, Sunday, November 16, 2014 at 12:56pm Ms. Sue can you tell me how you got that answer please. •math - Ms. Sue, Sunday, November 16, 2014 at 1:09pm Multiples of 6: 6, 12, 18, 24 Multiples of 4: 4, 8, 12...

### Physics

When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4 Hz. Find the ratio m2/m1 of the masses. For Further...

### Math

Camilles math teacher described a quadrilateral with 2 pairs of parallelvsides and 4 lineage of symmetry. Which of these quadrilaterals must have the characteristics that Camilles math teacher described? A. Trapeziod B. Square C. Rhombus D.parallelogram

### Math

Mario has a ribbon that is 5/8 yard long if she cuts her ribbon into 6 equal pieces what will be the length of each new pieces? I really need some help this test i'm doing has 50 math questions. And i'm really bad at math.

### Math

Ten students took a math exam. As the teacher evaluated the math exams, she noticed that 8 of the ten students scored above the median. Is this possible? Why I am leaning towards yes it is possible. Kinda confused

### physics/math

Three people are trying to hold a lion still for the vet. The lion, in the center, is wearing a collar with three ropes attached to it and each person has a hold of the rope. charlie is pulling in the direction of 62 degrees west of north with a force of 175 newtons. Sam is ...

### math

During one school year, Billy Bob earned $25 for each Math test he passed and was ined $50 for each Math test he failed. By the end of the school year, Billy Bob passes 7 times as many Math tests as he failed and he had a total of $375. How many tests did he pass?

### English

At school, he learns 10 subjects such as math, science, social studies, computers, ethics, etc. He is in math class now. He has a cell phone. He is sitting at the back. One of his friends calls him and asked "Which class are you in?" What is the answer to the question. 1. I'm ...

### Math

I'm studying to take a math placement exam and it has been a long time since I've taken a math class. Can someone please give me a step to step solution of these: A.Simplify: 8x/[2^(x-1)] Answer = 2^(2x+1) B.Simplify: (2^x)*[4^(x-1)] Answer = 2^(3x-2)

### math

Please help me with this problem: Jhon missed 5 points out of 100 points on his math test. What decimal number represents the part of his math test he answered correctly? my answer is 0.95. my work: 100-5=095

### PHYSICS

You push your physics book 2.20m along a horizontal tabletop with a horizontal push of 2.20N while the opposing force of friction is 0.500N . How much work does your 2.20N push do on the book? How much work does the friction force do on the book? How much work does the normal ...

### Math

There are 356 rows of tress growing in the field. There are 299 trees in each row. How many trees are growing in the field? Please help am stuck on this last math problem not good at the type of math problems.

### Math

If I spend t hours every night on my homework and 1/4 of the time studying math, what equation can I write to represent the number of hours I will spend doing my math homework during the next 5 days?

### PLEASE HELP, physics/math

Three people are trying to hold a lion still for the vet. The lion, in the center, is wearing a collar with three ropes attached to it and each person has a hold of the rope. charlie is pulling in the direction of 62 degrees west of north with a force of 175 newtons. Sam is ...

### Math

You are a letter and now your in a math problem explain to the numbers what your purpose is, how you are a friend, and how you solve algebra problems. Create a math problem and solve it. Use the letter and the number as the characters. Please tell me that this is not a ...

### Math

I lost my paper for the Math Riddle Pizazz page 167 about solving systems of equations and I no longer have the problems. (It is the "did you hear about the farmer who gave birdseed to his cows..." page) What are the math problems for it?

### math final studying

beth scored 75 on her first math test. she scored 20 % higher on her next math test. what did she score on the second test?

### Math

I don't remember sampling methods... i do know that there are three and one of them is litteraly called 'random'. if i can please be reminded of the methods i can finish the last 3 problems of my math.... i don't like math especially if you have a field reading test for the ...

### Physics

In calculating the force of gravity between two objects, if the mass of one objects increased by 4 and the other by 2, how many times would the force of gravity increase? Ok well Im horrible at physics but the way I understood it was that you would take 4 times 2 then divide ...

### Physics

A car weighing 9800 N moves around a circular track of 70 m in 60 s. (a)

### physics

How does changong the tension of a string change the pitch? It shortens the ocilation

### Physics

does anyone know what the rate of sound waves is for 12.6hz? Never mind got it

### PHYSICS

The masses and coordinates of four particles are indicated in the following table. 40 g

### Physics

When hitting a golf ball, does the force of gravity increase or decrease??

### Physics

What voltage is required to store 7.0 10-5 C of charge on the plates of a 5.0 µF capacitor? _________ V

### Physics

what is the use of knowing the center mass of an object when making a calculation?

### Physics

Why does the central maximum of a diffraction pattern is twice as long as any other? Thank you

### Physics

Why does the central maximum of a diffraction pattern is twice as long as any other? Thank you

### Science (physics)

I need to know how to build a catapult. I have no idea of where to start.

### physics

what is the initial velocity (Vyo) of a projectile launched horizontally? why? i know that it is 0 m/s, but i don't know why/how to explain it.

### physics

Is it possible for a collision to occur in which all of the kinetic energy is lost?

### physics

245kg=????ug I do not know how to change this to ug so if anyone could please show me how I would really appreciate it.