# Math/Physics

210,322 results, page 56

### PHYSICS

ADDITIONAL INO ADDED AT BOTTOM a spectator at a hockey game is sitting in a seat situated 10.4m above ground leve. if the spectator has a mass of 52.6 kg, calculate her gravitational potential energy relative to: a)ground level Eg=mgh =52.6X9.8X10.4 =5360.99J b)the ice surface...

Please check my answer to see if I got it right. Thanks. Braden has 1 hour of math homework to do. He spends 2/5 of this time complaining about how much he hates math, 1/3 of the total time looking for his calculator. How much time does Braden actually work on his math ...

### math

Ben can complete 3 math problems in 20 minutes. If he continues working at the same rate, how long will it take Ben to complete 15 math problems?

### math

Ben can complete 3 math problems in 21 minutes. If he continues working at the same rate, how long will it take Ben to complete 16 math problems? thanks .

### math

Ben can complete 4 math problems in 20 minutes. If he continues working at the same rate, how long will it take Ben to complete 17 math problems?

### Math

Valerie soent 32% study time on math and science. Math @ 3 hrs and Science at 5 hrs. How much time spent on studying subjects?

### math

In an examination 70 student failled in math¡A90failed in science and 20 failed in both. if 80 student passed in math using venn-daigram¡A find how mamy student were passed in both subject¡H

### PHYSICS - VERYYYY IMPORTANT!!!

VERY IMPORTANT FOR A PHYSICS PRESENTATION.. PLEASE HELP & EXPLAIN CLEARLY??? THANKS SO MUCH! (a) why is the centripetal force neede to keep a body moving in a circular path? (b) In what direction does a centripetal force accelerate the body on whic it acts?? (c) Upon what ...

### English

What's your favorite class? 1. It's a math class. 2. It's math class. 3. It's math classes. 4. Math class is my favorite. 5. Math classes are my favorite. 6. A math class is my favorite. (Which answers are correct? Are all correct?)

### physics

A large crate filled with physics laboratory equipment must be moved up an incline onto a truck. 1. The crate is at rest on the incline. What can you say about the force of friction acting on the crate? 2.A physicist attempts to push the crate up the incline. The physicist ...

### Physics

Explain what happens to the charge carriers in a semiconductor light dependant resistor when it is illuminated. Suggest why shining light onto an LED might be expected to generate a small voltage between its terminals. Thx A semiconducting light-dependent resistor excites more...

### Physics

I 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 ...

### physics/ math

A student bikes to school by traveling first d_N = 1.10 {miles} north, then d_W = 0.500{miles} west, and finally d_S = 0.200 {miles} south. You will now find the same quantity algebraically, without the need to use much geometry. Take the north direction as the positive y ...

### Math/Physics

A car of mass 0.9 tonnes is driven 200 m up a slope inclined at 5° to the horizontal. There is a resistance force of 100 N. (i) Find the work done by the car against gravity. (ii) Find the work done against the resistance force. (iii) If the car slows down from 12 m s− 1 to...

### Social studies?

Please ignore my previous post. I prematurely hit the enter key. I've been watching this board all day, waiting for someone to answer my physics question (no one has yet. sigh.) I just have to say Ms. Sue is my hero. She consistently answers almost every student's questions, ...

### Math

If a teacher allows 5/6 of an hour to be spent on homework and she allow 1/3 of that time to be spent on math, how much time will be spent on math?

### RE: PHYSICS

"Relative" is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring has negligible mass and...

### physics

Assistance required as to why visible light is not emitted when infrared radiation falls on fluorescent materials.

### Physics

A ball rolls off the edge of a balcony at 8.0 m/s. Find its speed after 3.8 s in the air. Use g = 10. m/s2

### physics

Which Law of Motion explains the action-reaction pair of forces. The first, second or third?

### Physics

Calculate the Magnitude of the resultant of a pair of 100-km/h velocity vectors that are at right angles to each other.

### physics

Find the the force the person must exert on the 14.5 kg lawn mower to accelerate it from rest to 1.5m/s in 2.5 seconds?

### physics

a car traveling at 7.0 m/s accelerates uniformly at 2.5 m/s TO REACH A SPEED OF 12.0 M/S HOW LONG DOES IT TAKE FOR THIS ACCELERATION TO OCCUR?

### Physics

Can anyone help? the resistance of the side lights on an automobile are 10 ohms. How much current flows in them when connected to 12 volts

### Physics

How can you easily increase the magnetic field strength inside a current-carrying coil? Could someone help?

### physics

true or false: according to einstein, a gravitational field is equivalent to an accelerating frame of reference.

### physics

a dragster starting from rest accer;ates at 49m/s how fast is it going when it has raveled 325m?

### physics

object kicked at 45 degree and travels 82 m b4 hitting the ground. what was its vo? how long was it in the air? how high did it go? please and thanks

### physics

2.A plank is tilted slowly to an angle of 30 degrees with a 12 pound block on it Find FN, FF and the static friction?

### physics

A 2.8 kg air mattress is 2 m long, .5 m wide, & .1 m thick. What mass can it support in water before sinking?

### Physics

On a dt graph if there is a curve from 1 decreasing to 1.2 in an interval does is the velocity and acceleration + or 9? And is it slowing down or speeding up or neither?

### Physics

An object moves with acceleration given by a = -6t^3 m/s^2. Its initial velocity at t = 0 is 5 m/s. How far will it move before stopping?

### Physics

An object moves with acceleration given by a = -6t^3 m/s^2. Its initial velocity at t = 0 is 5 m/s. How far will it move before stopping?

### physics.

Describe constructive and destructive interference in terms of the combining of crests and troughs and the reesulting amplitude.

### Physics

8. Fire engines used to be red. Yellow-green is now the preferred color. Why the change?

### Physics

How could you use the spotlights at a play to make the yellow clothes of the performers suddenly change to black?

### Physics

Suppose you walk toward a mmirror at 2 m/s. How fact do you and your image approach each other? Explain your reasoning.

### Physics

Your friend says that the wavelength of light waves is less in water than in air. Do you agree or disagree, and why?

### Physics

What are the restrictions on the orbit of a communications satellite if it is to appear motionless in the sky as viewed from any location on earth?

### Physics

Is getting shot considered to be an elastic or inelastic collision if blood shoots out everywhere?

### physics

A 1.00-kg ball is attached to a string of 0.50 m and swung in a horizontal circle with a velocity of 2.00 m/s. Find the centripetal acceleration. ac=v^2/r = 2.00^2/.50 = 8.0 m/s^2

### physics repost

Calculate the force of gravatational attraction between two spheres of mass 10.1 kg and 45.4 kg that are 38.5 m apart. F = G(m1)(m2)/r^2 = 6.67 x 10^-11(10.1)(45.4)/38.5^2 = 2.06 x 10 ^-11 N

### physics 2

If you see a flash of lightnng and it is 3 sec. before you hear the clap, how far away is the storm?

### Physics

Does the de Broglie model assert that an electron must be moving in order to have wave properties?

### physics

the making of polymers is an example of the category of work done by chemists caledd _______ fill in the answeerrr

### applied physics

if a DC motor uses a775 coulombs of charge in 15 seconds,how much current is produced

### physics

a 0.03 mol sample of helium is taken through a cycle. the temperature of state A is 400K. calculate V.

### physics

An electron and a proton that are placed in an electrical field both accelerate equally. True or False?

### Physics

You throw a ball downward from a window at a speed of 1.8 m/s. How fast will it be moving when it hits the sidewalk 2.8 m below?

### Physics

How do you find the moment of inertia of an actual bicycle about an axis through the pedal crank?

### Physics

What is the gravitational force vetween 2 15-kg packages that are 35cm apart? What fraction is this of the weight of one package?

### Physics

How much potential energy does Tim, with mass 60.0 kg, gain when he climbs a gymnasium rope a distance of 3.5m?

### physics

Three balls A, B, and C, with masses of 3 kg, 1 kg, and 1 kg, respectively, are connected by massless rods. What are the coordinates of the center of mass?

### Physics

If you had to straighten out a refracted ray that went through a lens with a focal length of +15 cm, what could you do?

### astronomy/physics

determine the mass of the earth from the known period (365.25 days) and the distance of the moon (3.84X10^3 km)

### physics

A force of 291.0 N is used to push a 140 kg mass 30.0 m horizontally in 3.00 s. Calculate the power developed in kW.

### Physics

A yo-yo has a string length of 0.200 m What is the slowest speed at which you can spin it to keep it in a fixed path? What is this, and how do you find it? Thanks

### physics

determine the velocity and kinetic energy of neutrons having de broglie wave length 1 angstrom

### physics

List four effects that can be observed that demonstrate light travels in straight lines. Does anybody know the answer??

### PHYSICS

How is it possible to have an instrument like a bugle that has a fixed-air column play a melody?

### college physics

an automobile traveling at 25.0 km/h along straight,level road accelerates to 65.0 km/h in 6.00s what is the acceleration

### Physics

Which force acts opposite of the direction of displacement of the object? I think it would be friction...but could it be spring?

### physics

What is the longest wavelength of light that will emit electrons from a metal whose work function is 3.10eV?

### physics

using ideas of torque and center of gravity explain why a ball rolls down a hill

### Physics

What are some of the safety considerations and technologies used in designing a safe roller coaster ride?

### physics

What initial mass of 235U is required to operate a 650-MW reactor for 1 year? Assume 40% efficiency.

### Physics

Who was Isaac Newton? Write a brief paragraph about his life and work (include a bibliography)

### Physics

If a tern travels 3.20 x 10^4 km south in 122 days, what is its average velocity in kilometers per day?

### Physics

If a tern travels 3.20 x 10^4 km south in 122 days, what is its average velocity in kilometers per day?

### Physics

How do you know when to use cos or sin or tan when they give you angles in the question to find tension or force?

### physics

Who does more work if your friends pushes a something four times further than you with half the force?

### Physics

A 5 N force directed to the west acts on an object for 2.0 seconds. What is the change in momentum of the oject? Would it be 5 X 2?

### physics

Rubidium forms the postive Rb+ Is this ion larger or smaller then the neutral atom? Explain PLEASE

### physics

How do the acceleration vectors differ on opposite sides of the path for un iform circular motion? How are they the same?

### physics

How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?

### physics

How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?

### physics

An airplane travels at 144 km/h toward the northeast. What is the northern component of its ve- locity? Answer in units of km/h.

### physics

A _____________ volt battery will increase the potential energy of 0.005 coulombs of charge by 29.5 joules.

### physics

A light bulb with resistance of _____________ Omega draws 900 mA from a 110 V household circuit.

### Physics

a projectile is launched with an initial velocity of 60 m/s at an angle of 30 degrees above the horizontal. how far does it travel?

### physics

calculate the force of a 300,00 kg jumbo jet that is accelerating 0.4m/square just before takeoff

### GENERAL PHYSICS

Two long, parallel wires separated by 90 each carry currents of 2.0 in a horizontal direction.

### physics

If wind blows at 44 m/s over a house, what is the net force on the roof if its area is 180 m^2 and is flat?

### physics

A spring has k = 88 N/m. Use a graph to determine the work needed to stretch it from x = 3.6 cm to x = 5.6 cm, where x is the displacement from its unstretched length.

### physics

an ant walk 1 meter west and then 3 meters north whats is the ants direction in degrees

### physics

an ant walk 1 meter west and then 3 meters north whats is the ants direction in degrees

### physics

An object falls a distance h from rest. If it travels 0.43h in the last 1.00 s, find (a) the time and (b) the height of its fall.

### physics

estimate the rotational kinetic energy of earth, assuming it to be a solid sphere of uniform density

### physics

Calculate the force of gravity on a spacecraft 12800 km above the earth's surface if its mass is 700 kg.

### physics

The vertical leap of a professional NBA athlete is reported to be 47.3 inches. What is his takeoff speed? in m/s? is this kinematics??

### physics

A bike travels at a constant speed of 4.0 m/s for 5.0 s. How far does it go? GIVEN: V = 4.0 m/s t = 5.0 s Would you use this equation? D= Vit + 1/2 at^2

### Physics

How far does a plane fly in 15 s while its velocity is changing from 145 m/s to 75 m/s at a uniform rate of acceleration?

### Physics

What potential energy does a 60.0-kg gymnast acquire in climbing 5.00 m up a vertical pole? GIVEN: mg = 60 h/d = 5.00 m PE = mgh PE = (60)(5.00) PE = 300 J

### physics

What vector represents the displacement of a person who walks 15 km at 45 degrees south of east, then 30 km due west?

### physics

Correct the following statement: The racing car rounds the turn at a constant velocity of 145 km/hr.

### Physics

As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?

### college physics

A delivery truck travels 10 km north, 18 km east, and 29 km south. What is its final displacement (in km) from the origin?

### College Physics

To move 5.0 C of charge from one electrode to the other, a 12-V battery must do how much work? 60 J 5.0 C 12 J 12 V 60 W

### physics

for some reason, choice 6 was incorrect when i tried it sorry to keep bothering you about it drwls

### physics

how to calcula distance of a object in free fall if only the time it reaches the ground is given