# Math/Physics

208,897 results, page 87

### physiçs

What precautions shouĺd i apply when doing a coefficieñt of friction.force applied to a blocķ on a hořizontal plane?

### Physics

You can run 8.0 m/s , 20% faster than your brother. How much head start should you give him in order to have a tie race over 90 m ?

### physics

A 58 kg skier has a speed of 9.5 m/s at point A. She then encounters a 1.75 m deep dip in the snow's surface that has a circular cross section with a radius of curvature of 12 m.

### Physics

What is common to all light sources, including incandescent, fluorescent, neon, halogen, laser, and sodium vapor devices?

### Physics

Two charges +1C and -1C are placed at distance 1m apart ,each having masses 2kg respectively are released.what is the type of collision they experience?

### physics

A splash is heard 3.12s after a stone is dropped into a well 45m deep.the speed of sound in air is(g=10m/s2)

### Physics

A dense plastic toy of mass 2.8 kg is floating just beneath the surface of a pond. What is the buoyant force on it? Answer in units of N.

### physics

If the sun's mass is about average, how many stars are there in the Milky Way galaxy? (This is all the information given in the question and I don't know where to go from here).

### Physics

Is the tension on a rope zero just before a person releases it after swinging from one side of a river to the other?

### Physics

8kg mass moving with a speed of 30 of 30ms-1 is brought to rest in 2.5sec, calculate the magnitude of the constant retarding force

### physics

Find the total heat capacity of a 2.0 mol diamtomic ideal gas at constant pressure if the molecules can rotate and vibrate.

### physics

A body is moving with uniform acceleration of 10m per second square.lf it start from rest calculate its displacement afrer 5s

### Physics

What mass would you hang on the right side of the system in the figure to balance it -- that is, to make the clockwise and counterclockwise torques equal? (Let x1 = 33 cm and x2 = 12 cm.)

### Physics

A box with a mass of 10 kg slides along a horizontal surface. A force of 50 N is needed to keep it moving. What is the coefficient of kinetic friction?

### science,physics

The focal length of a mirror is given by 1/f=1/u+1/v where u and v represent object and image distances respectively,The maximum relative error in f is ?

### Physics

A 600kg car is moving on a level road at 30m/s.how large is a retarding force is required to stop it in a distance of 70m

### Physics

What is the wavelength of light in water if it has a frequency of 6.8 x 10^14 Hz? I don't know what formula to use and don't understand. I tried Lambda=c/v and got it wrong. Answer needs to be in nm. Thanks.

### Physics

If a cyclist takes two minutes to complete half revolution on a circular path of 120m radius.what is the average speed?

### Physics

I don't understand what formula to use for this question: Points A and B each have an electric potential of +9 V. How much work is required to take 1 mC of charge from A to B? Thank you

### Physics

A cyclist moving on a corcular track of radius 40m completes half a revolution in 40 sec. Its average velocity is nearly

### physics

what is the maximum torque on a rectangular coil 5 cm x 12 cm and with 600 turns when carrying a current of 0.0700A in a uniform field with magnitude 0.300T?

### Physics

The earth has a radius of 6380 km and turns around once every 24 hours. What is the average speed of a person resting at the equator?

### Physics

Calculate the skid to stop distance of a car traveling on a road at 100 kilometers per hour with a coefficient of friction of 0.68.....

### physics

While rearranging a dorm room, a student does 307 J of work in moving a desk 1.1 m. What was the magnitude of the applied horizontal force?

### PHYSICS

In an archery practice an arrow was realesed from a bow with a velocity of 20m/s it strikes and slopes find at what rate the aarrow was aaccelarated

### Physics

A truck of mass 2 tonnes moving at a speed of 25 m/s is brought to rest suddenly in 5 seconds. Calculate the power exerted by the brakes

### science(physics)

A powerful motorcycle can accelerate from rest to 28m/s in only 4 second . a.what is its average acceleration? b.how far does it travel in that time

### physics

What is the acceleration (in meters/second^2) of free falling 74kg sky diver, if the air resistance exerts a force of 233n?

### Physics

A rocket initially at rest accelerates at a rate of 80 m/s^2 for 0.74 min. What is its speed at the end of this time? Answer in units of m/s. Plz help and explain

### Physics

What is the escape speed of an electron launched from the surface of a 1.5 cm diameter glass sphere that has been charged to 10 nC? Which equation(s) would I use?

### Physics

A 70 kg waterslide rider traveling at 15 meters per second hits a ramp with a 58 degree launch angle - How high will they fly?

### Physics 11

An airplane flies at 500km/hr, there is a wind kf 50.0km/h(N).if the pilot wants to fly due east, calculate the direction that the plane is heading. Thanks.

### Physics

A stone thrown upward to just reach the top of a palm tree that is 8.2m tall. Calculate the initial speed that is require

### Repost(Physics)

A vehicle moves in a straight line with an acceleration of 2 km/h^2. By how much does the speed change each second? Answer in units of km/h. Plz help?

### Physics

An Olympic long jumper is capable of jumping 8.44m. Assuming his horizontal speed is 5.644m/s as he leaves the ground, how high does he go?

### physics (urgent)

A flywheel with a moment of inertia of 1.00kg m^2 is rotating at 100 rpm. What torque is required to bring it to rest in 10.0 revolutions?

### Physics

How long will it take a motor with an output power of 4000 W to lift a 250 kg container vertically upwards 25 m? how would u do the calculation?

### physics

A stone of mass 2.8kg is projected upward with a speed of 5m/s. calculate the maximum height reached. use g=10m/s square.

### physics

consider your sitting in a chair inside the living room on a leveled floor.if you are at the origin what will be the position vector of spider on any of wall

### Physics

Two spherical objects have masses of 3.5 x 10^7 kg and 6.5 x 10^9 kg. Their centers are separated by a distance of 125000 m. Find the gravitational attraction between them.

### Physics

A baseball is thrown at an angle of 20◦ relative to the ground at a speed of 25.8 m/s. The ball is caught 43.6152 m from the thrower. The acceleration due to gravity is 9.81 m/s2 .

### physics

Geostationary satellites are placed on orbits of radius 4.2×10^4m use this information to deduce g, the acceleration of freely falling body, at this height.

### Physics

A simple pendulum is oscillating with an angular amplitude 60°.If mass of bob is 50 gram the tension in the string at mean position is(g=10m/s2)

### physics

A particle (p) moves along the curved surface (s). Show that p will remain in contact with s provided that at all times its speed v≥√rgcosteta.

### Physics

A 300v battery is connected across capacitors 3uF and 6uF in parallel. Evaluate the charge and energy stored in each capacitor

### Physics

C:\Users\100622325\Desktop\1.jpg Given the figure above, if a = 5.53 cm and b = 4.15 cm, what would be the force (both magnitude and direction) on the 5.0 nC charge?

### physics

How much heat is absorbed by a 30g iron skillet when its temperature rises from 24oC to 93oC? Joules do i addition everything?

### PHYSICS

An object is projected horizontally on a floor at 100ft/s. It then decceledates at 10ft/s2. After 5sec what are a.the speed of the body b. The distance it traversed

### physics

How much time will it take a car travelling at 88 km/hr (55 mi/hr) to travel 500km? Show work for credit and include final units.

### physics

From the graph made, compute for the instantaneous acceleration of the rider for each inclination at any chosen time by computing for the slop of the tangent line?

### physics

A beer is dropped from a window 30 m above the ground. How fast will it be moving just before it lands? (Neglect air resistance).

### Physics

A point light source is kept in front of a convex mirror at a distance of 40cm.find the position of image by drawing

### physics

the current through a meter movement is 150 micro amperes. what is the dc value if the instrument uses half-wave rectification?

### physics

A 2.0 kg mass is sliding on a flat surface, with an initial speed of 20 m/s, and a coefficient of friction of 0.2. what is the magnitude of its acceleration? I know the answer is 2.0 m/s^2, but can someone show me how ?

### Physics

Three particles have charges +20μC each.They are fixed at the corners of an equilateral triangle of side 0.5m .The force on each of particle has magnitude

### Physics

If you were to launch a block with m = 0.500 kg up a ramp with θ = 15ο and µk = 0.30 with a plunger with k = 100 N/m which compresses by 0.040 m, what distance would you expect to travel?

### physics

Determine the frequency and period for a pendulum of length 250cm, mass of 500g, and amplitude of 25cm I don't understand how to do this, help would be appreciated! Thank you

### physics

A fighter jet is flying at Mach 3.2 in air of temperature 2 degrees C. What is the planes speed? I really don't understand how to do this question. I'd appreciate your help!

### Physics

A train moving with constant speed of 54kmph moves eastwards for 30min then north for 40min find avg velocity

### Physics

A weightlifter raises a barbell of mass 150 kg from the floor to over his head 2.5 meters in 3 seconds. What is his average power input?

### physics

An iron vise falls from rest at a great height. Neglecting air resistance, what is its speed after it has fallen for 5 seconds?

### physics

an object of mass 2 kg attached to wire length 5 cm is revolved in a horizontal circle if it makes 60rpm find angular speed

### Physics

When a body slides along an inclined plane of height 'h' and describes a vertical circle of radius r on reaching the bottom Ans:h =5R/2

### Physics

The speed of light in vacuum depends on, 1)wavelength 2)frequency 3)intensity 4)temperature 5)none of the above I know that 1 and 2 are correct. What about the others?

### Physics

A jack has a lever arm of 45cm and pitch of 0.5cm. If it's efficiency is 30%,what force is required to lift a load W of mass 1200kg

### Physics

A real spring does not oscillate forever. Instead, it eventually comes to a stop. Does this violate the Law of Conservation of Energy? Explain why or why not.

### physics

A ball thrown with a speed of 100m/s attains a height of 150.calculate (a)the time of flight (b)the angle of projection (c)the range

### statistics

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and ...

### math

tell how you did it thank you Write an equation using n and t. The total bill (t) was twenty times the number of people (n). t = 20n ? "was", "is", "will be" translates into math as "="

### math

have a question in math (( distance between two points )) show that C(-5,-1)is the midpoint of the line segment joining A(-2,5) and B(-8,-7) please in detales .. thank u

### math

have a question in math (( distance between two points )) show that C(-5,-1)is the midpoint of the line segment joining A(-2,5) and B(-8,-7) please in detales .. thank u

### math

i am having trouble iwth the following math problem: lim x->oo -x/squre root 4+xsquare I am not sure if i multiple the denominator with the numerator?

### arithmetic

Well I am really bad at math mostly multiplication and division.When I start to think that i am getting math my teacher teachs something new what do i do.

### Math

I'm trying to decide what math course to take next year. How do Statistics and Trigonometry compare in difficulty? Which is more helpful for the SAT's? THank you for your explanations.

### math

I am already weak at math, but when they throw in letters it throws me off and confuses me more... can someone please show me how to work this problem? Ax+Hy=L,for x.

### math gr 9

hi can someone please post a website where I can do free grade 9 math exam practice.. i have already tried proprof but they are full...

### math

i just started this semester of math and i don't remember that if your adding mixed fractions are you supposed to chage it into an improper fraction to add it?

### math

Page 114 of pizzazz math has got me clueless. None of the problems make since and my homewrok is due tomorrow. Please help me!!!!

### Math

A ball has a radius of 56mm a)Calculate the surface area b)what is the volume of the sphere could somebody please answer for my math homework I need help

### Math

Writing in math Braden and bialy each bought a kazoo for \$0.89.they each paid with a \$1.00 bill. Explain two different ways to show their change.

### Math 10-3

the work i got from my math teacher says Determine the surface area of each right rectangular prism to the nearest square unit. Any Help with that?....

### Math 112

Can you use the numbers 1 - 9, along with any math symbols and operations, to arrive at the answer of 100 when the 6 and 9 have a negative sign in front of them?

### math

grandma trying to help my grandson in 5th grade math...question/"explain how knowing that 5 divided 8=0.625 helps you write the decimal for 4 5/8?

### math

Integrated Math 1. The Overland Trail: Traveling at a constant Rate. Who will make it? Need help graphing 3 sets of data on one graph?

### Math

Please help with math question below: Express the triple angle formula of tangent (i.e. tan〖(3x)〗) in terms of tanx.

### Math

Help plz I got a new Math problem that said this " Which letter has two obtuce angles? " ( My sis is " smartybrat" ) if you can answer it go by "Maddy .H."

### Math

Hello everyone! I'm a 10th grader and I scored a 3331 on my math scantron performance series test.... is this good, average or bad? Thanks! -a

### math

If it takes 1/4 an hour to type one page, how many pages can be typed in 3 1/2 hours? The answer is 14, right? But what is the written math equation to solve this?

### math

I just finished doing my math study guide for a test and there is one question that I don't know how to do. It is: f(x)=5-2x and g(x)=x^2=7x, find each value. a. g(3) b. f(2)+g(-1) c g(2x) I do not understand this at all, could someone explain this to me? Thank you.

### physics

A physics student pulls a block of mass m = 23 kg up an incline at a slow constant velocity for a distance of d = 4 m. The incline makes an angle q = 25° with the horizontal. The coefficient of kinetic friction between the block and the inclined plane is µk = 0.3. a) What is...

### Physics-Dr. Bob cannyou look at my work-I'm still

had this question last night for Dr. Bob-A fox sees a piece of carrion thrown from a nest 14 m high and goes to get it. Carrion is thrown 1.5 horizontal velocity. Fox is 7. m from base of tree. What is mgnitude of fox's average velocity if it grabscarrion just as it touches ...

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 fed his cows birdseed.." page) What are the math problems for it?!?

### Math--time

how do u add and subtract time.... ex. Math class is dismissed at 2:20pm ,It is now 1:53pm how many more minutes before math class is dismissed. It is a subtraction, but remember each hour is 60 min. 2:20 - 1:53 but you cant subtract 53 from 20, so you borrow.. 1:80 -1:53 and ...

### math

what time is spent on art and math if math is 21% and art is 14%

### Math

The school's total attendance is 449, there are 81 present in math class, what percent of the total attendance is the attendance in the math class (to the nearest tenth)?

### math,help

Is it the same thing : fibonacci math and the golden mean? for one i know that this type of math deals with sequences but can someone explian to me briefly the differnces and similarities. http://en.wikipedia.org/wiki/Golden_ratio

### Physics

Two 0.09g pith balls are suspended from the same point by threads 40cm long. (Pith is a light insulating material once used to make helmets worn in tropical climates.) When the balls are given equal charges, they come to rest 19 cm apart What is the magnitude of the charge on ...

### physics

The physics of a golf ball and kinetic energy. When a 0.045 kg golf ball takes off after being hit, its speed is 41 m/s. a) What is the kinetic energy of the ball after it has been hit? b) How much work is done on the ball by the club? c) Assume that the force of the club acts...

### Math

Homework grades are 5% of the overall grade. Lab work is 15% of the overall grade. Tests are 60% of the overall grade. The Final is 20% of the overall grade. Could a student that has a 75 homework average, 80 lab average, 40 test average, and 50 on the final pass the course? ...

### Physics Newton law

A 10O0Kg elevator is hoisted upward from rest by a cable. In the first two seconds there is an 1100N tension force in the cable hoisting the elevator. What is the speed after two seconds and how far has it travelled ? Get the acceleration first. Tension=mg + m*acceleration. ...