Math/Physics
214,413 results, page 56

Physics honors
If a racer runs at an average speed of 7m/a how far will she run in 1 min 45 seconds? 
Quick Physics Question
Are both linear and angular momentum conserved in static equilibrium ? 
physics
A 84.0 kg person is being pulled away from a burning building as shown in the figure below. 
PHYSICS
what is the angle velocity of an object in a horizontal circular part with radius 1.5 with a constant speed of 12/s 
physics
A mango fruit drops from the top of it's tree which is 40 m. How long does it takes to reach the ground 
physics
If your car goes from 0 mi/h to 70 mi/h in 8 s, what is your average acceleration? Answer in units of miles/(hours x seconds ). 
physics
A uniform rod of 1 meter is bent at its midpoint to make90.The distance from its centre of mass 
physics
How many minutes would it take a radio wave to travel from the planet Venus to earth? 
physics
An object is projected at an angle of elevation of 45 degree with a velocity of 100m/s. Calculate it's range 
Physics
To what potential a sphere of radius 10cm be charged so that the surface density of charge is equal to 1 
Physics
consider the circuit in the figure. find the current in the 13 ohm resistor. Answer in units of A 
Science physics
How would the voltage output be affected if the armature is made to spin faster? 
Physics
the co efficient of friction of a plane inclined at 30 degree is 0.4 . Then the acceleration of the body sliding freely on it is? 
physics
A car slows down uniformly from a speed of 24.0 m/s to rest in 4.50 s. How far did it travel in that time? 
Physics
If a man travels 7km N 40degree W and 10km East, find the resultant displacement. 
physics
when an apple falls from a tree, and strikes the ground without bouncing, what happens to its momentum? 
physics`
which has more momentum: a snail moving at .001m/s or a 2ton boulder resting on the ground? why? 
physics
What mass of ice at 14°C will be needed to cool 200cm³ of an orange drink(essentially water) from 25°C to 10°C? 
physics
A particle is projected with a speed of 39.2m/sec at an elevation of 30degrees.find its greatest height. 
Physics
a boat sails 150km N60°E, then 100km West. What is it's displacement from its starting point? 
physics
Whn sand is poured on a rotatory disc what happens to its angular velocity. Explain 
Physics
A 62 kg person is skiing down a 37 degree slope that has a coefficient of 0.15. what is their velocity after 5.0 seconds 
physics
An object is projected at an angle of elevation of 45 degree with a velocity of 100 m/s calculate its range 
Physics II
find the pressure at the bottom of a vessel 76cm deep when filled with a) water b)mercury (sp.g. 13.6) 
physics
How much heat energy must be added to a 3.0 cm × 3.0 cm × 3.0 cm block of aluminum to raise its temperature from 50∘C to 50∘C? 
Physics
How much does it cost to operate a 23W porch light for 24 h if electric energy costs 8¢/kWh? 
Physics
A stone with a mass of 20kg and density of 20,000kg/m3 is immersed in water. Find its weight 
physics
which formular do to use to calculate distace in newton's law if i have height and angle? 
physics
How much work isneeded to stop a 20g bullet moving with a speed of 150m/s 
Physics
Things around you are emitting infrared radiation that includes the wavelength 1.13 105 m. What is the energy of the photons? 
Physics
Find speed of sound in air if distance is 170 meters and time is 1.1 second 
Physics
What is the linear acceleration of a point on the rim of a 38 cmdiameter record rotating at 33 1/3 rev/min? 
physics
A positive and a negative charge, each with a magnitude of 1.41 x 10^5 C, are separated by a distance of 0.44 m. Find the force on each of the particles. 
Physics
A cooking pot contains 0.8kg of water at 100degree celcius what is the specific heat 
Physics
the speed of a train increases from 15 mi/h in a distance of 500 ft. calculate the average acceleration in ft/s squared 
Physics
What is the direction of the displacement of a person who walks 10 km at 37 degrees south of east, then 14 km due west? 
physics
An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source 
physics
An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source 
Physics
How long does it take a car to change it velocity from 15m/s if it accelerarate uniformly at 5m/s square? 
Physics
The density of the dead sea is 1240kg/m^3. Calculate the depth at which the pressure would be 3 atm 
PHYSICS!
Find the gauge pressure in pascals in a soap bubble 0.04 m in diameter. The surface tension is 25.0 x 10^4 Pa. 
Physics
Two instances during which the heating effects of electric current is not required pls 
physics
And and climb up 5 stairs , each of width 20 cm and height 20 cm . Find the distance covered and displacement of ant ? 
Physics 2
What quantity of heat is needed to convert 1kg of ice at 10C to liquid at 20C? 
Physics
The ratio of maximum and minimum magnitudes of the resultant of two vectors a and b is 3:1 now a is equal to 
physics
a cricket ball is takes 3 sec to reach the maximum height its initial velocity is??? 
physics
How many electron can passes through a cross sectional area of a conductor per second 
Physics
A bowling bowl has a mass of 25 KG. What is the acceleration of the ball if an upward force of 110 N is applied? 
Physics PLS HELP
What is the difference between universal gravitational constant and acceleration due to gravity 
physics
Starting from the constantacceleration kinematic equations, write a formula that gives xf in terms of t, xi, vf, and a. xf 
Physics
How come in the number 5.350, there are 4 significant figures? Is the 0 considered a trailing zero with a decimal? 
physics
a pendulum swing with a speed of 1.5 m/s at its lowest point. How high will it rise before it stops 
Physics
A bike starts from rest and accelerates to 20 m/s over a period of 6 seconds. What is the acceleration of the car? 
Physics
How can an object be a specular reflector for some electromagnetic waves yet be diffuse for others? 
Physics! NEED HELP!
A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require? 
Physics
What is the normal force when a 40 kg person jumps and is accelerating at 3 m/s2 upward while in contact with the ground? 
Physics
What is the normal force when a 40 kg person jumps and is accelerating at 3 m/s2 upward while in contact with the ground? 
As physics
General braking distance formula /working out please clearly say. 
physics/electrical circuits
if there are eleven resistors of 33k ohms each in parallel, what is the total resistance? 
Physics
I have to check that Maxwell's equations are dimensionally correct. How the hell can I do this? Thank you very much. 
physics
Explain why you don’t need a displacement vs. distance graph for light, but you do for other traveling waves. 
Physics
Emily rides her horse 48 km in 3 hours.What is her average speed in kilometers per hour? 
physics
An object is dropped from a height H. During the final second of its fall, it traverses a distance of 57.8 m. What was H? 
Physics (HELP)
A real image is usually inverted, but can be upright in special cases. True or false? 
Physics
What takes more energy to raise its temperature by one degree, water or ice? Thanks! 
Physics
calculate the magnitude and direction of the resultant of two vectors 5N and 7N inclined at an angle 30° to each other 
Physics
Find the force necessary to stop a 900 kg jetta traveling at +25 m/s in a time of 5.0 seconds. 
Physics
Calculate the velocity of a 6kg riffle that shoots a 0.025kg bullet at a speed of 615m/s. 
physics
a car of mass(m)800kg initially at rest is accelerated at rate of 4m/s calculate the k.e @ 5seconds 
Physics
Determine the xintercepts of the polynomial function y=6(x+7)^4 + 5. Round to two decimal places, if necessary. 
Physics
I am curious how the earth work as an omnipresent conductive surface in an electrical distribution system? 
Physics
How can grounding prevent property damage and harm, even death when lightning strikes? 
Physics
Calculate the potential energy of a 5.0 g (0.005 kg) paper airplane 5.0 meters above the ground 
physics
if an object is pushed along a rough horizontal surface and moves at a constant velocity, then... 
Physics
How might the poor fellow stranded in the desert benefit from a pair of Polaroid sunglasses? 
physics
What is the gravitational force on a 20Kg satellite circling the earth (Re = 6.4 x 10^6 m, Me = 6 x 10^24Kg) with a period of 5hr? 
Physics
The oscillator of a 96.1MHz FM station has an inductance of 1.8μH. What value must the capacitance be? 1.5e12 is wrong? 
physics
Calculate the total energy of 2.0 kg object moving horizontally at 10 m/s 50meters above the surface. 
Physics
The electronvolt is _____ than the SI unit for the same physical quantity. a. smaller b. greater 
Physics
A photon a. is a quantum of light b. is a wave c. means bundle of energy(I think it's this one) 
Physics
A cricket jumps vertically upwards, and remains in the air for 1.6 s. At what speed did it leave the ground? 
physics
Give two examples of ways that physicists model the physical world. I was wondering if this would be an effective answer for "give two examples of ways that physicists model the physical world." 1. Physicists build computer simulations. 2. They build smallscale replicas. I ... 
algebra 2
Lincoln High School has 98 teachers. Of the 42 female teachers, 8 teach math. One seventh of all of the teachers teach math. What is the probability that a teacher is a man or does not teach math? 
math
i m always having a problem in math. i can't do fraction easilly. im going to have an final exams , starting on 2 april . i hope if any one can help me. You need to tell us, in detail, what you don't understand about fractions. o!isnt the test the...SAT?? yes,,im good at math ... 
Physics  General Physics
Violet light and red light travel through air and strike a block of plastic at the same angle of incidence. The angle of refraction is 30.700° for the violet light and 31.380° for the red light. The index of refraction for violet light in plastic is greater than that for red... 
physics
Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration that has a ... 
Physics.. please help!!!!!
A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 16 m/s at angle of 46◦ above the horizontal. The top of the fence is 4 m high. The ball hits ... 
Physics
A 40 gram bullet is fired horizontally from a gun with a momentum of 2.8 (kg*m/s) and embeds itself into a 300 gram block of wood initially at rest on a wooden horizontal surface. After this collision the wood block slides 15 meters before falling off a table with a height of ... 
physics
A 40 gram bullet is fired horizontally from a gun with a momentum of 2.8 (kg*m/s) and embeds itself into a 300 gram block of wood initially at rest on a wooden horizontal surface. After this collision the wood block slides 15 meters before falling off a table with a height of ... 
Physics (maybe it's just math)
A sphere of copper is subjected to 89.7 MPa of pressure. The bulk modulus is 130 GPa. a) By what fraction does the volume of the sphere change? b) By what fraction does the radius of the sphere change? for a) I have dV/V = 0.00069  this is correct. for b) the area I have 4/3 ... 
physics response to bobpursley
which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and an equivalent amount... 
Math  Precalculus  Parametric Equations/Geometry
A hockey puck of diameter 3 inches is spinning around its center at a speed of 3 counterclockwise rotations per second. The center of the puck is traveling at a speed of 24 inches per second at an angle of 45 degrees to the positive real axis. (a) At time t=0, the center of ... 
Physics,Question ,Solved but about Units?
These are “pluginthenumber” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are onestep substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total distance covered ... 
physics
Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250 kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.350 s later. Next, the ball was given a net charge of 7.60 muC and dropped in the same ... 
physics 4
help me in this topicsmass vol.relationship,graphs and itinterpretation,vectors and scalars help me more to understand this topics the tools in physics,measurement,vectors and scales It is quite impossible to divine what you don't understand. We can easily critique your ... 
math
Show that if x is a nonzero column vector in R^n, then the nxn matrix: A = I  2/x^2 * xx^T is orthogonal. Notation key: x = norm of x x^T = transpose of x I = identity matrix. Let me try to convince a math student to use "physics" notations that many mathematicians ... 
physics
An inquisitive physics student, wishing to combine pleasure with scientific inquiry, rides on a rollercoaster sitting on a bathroom scale. (Do not try this yourself on a rollercoaster that forbids loose heavy packages.) The bottom of the seat in the rollercoaster car is in a ... 
physics
While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz. Later on as you near your destination, you come upon the scene of the accident. The nowstationary ambulance runs its siren as it's about to drive... 
physics
While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz. Later on as you near your destination, you come upon the scene of the accident. The nowstationary ambulance runs its siren as it's about to drive... 
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...