# physics please HELP !

74,851 results, page 62-
## Physical Science

What are the noninvasive benefits of the medical technologies that rely on physics of elementary particles? -
## physics

At 7.15 cents per kilowatt-hour, what does it cost to leave a 75.0W light burning 24.0 hours a day? -
## GENERAL PHYSICS

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

how much work is needed to raise a 6.0 Kg object14.0 m at constant speed?assume that friction is negligible. -
## physics

a cricket ball is takes 3 sec to reach the maximum height its initial velocity is??? -
## physics

when two lenses of focal length +10cm and -5cm are placed in contact then find the net power ? -
## physics

if the gravitational constant, increased to a billion times its actual value, what sorts of things would happen? -
## physics

A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal. How far does it move horizontally -
## physics

an airplane taking off from a landing field has a run of 500m. Calculate the average acceleration in ft/s2. -
## physics

How long will it take a 1920 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above? -
## Physics

Does the period of a satellite in a circular orbit increase or decrease as its distance from earth increases? Thanks :) -
## Physics

Q: A car travels in a straight line for 4.6 h at a constant speed of 95 km/h . What is its acceleration? Answer in units of m/s 2 -
## 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

What will a spring scale read for the weight of a 75 kg woman in an elevator that moves upward with acceleration 0.30 g? w=? -
## physics

Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help -
## college physics

Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples. -
## Physics

An airplane lands and starts down the runway at a southwest velocity of 43 m/s. What constant acceleration allows it to come to a stop in 1.1 km? -
## physics

What is the period and frequency of a 10-pound weight oscillating (as a pendulum) on a 5-meter-long rope? -
## Physics

How long would it take for a beam of light to travel around the earth in an ideal fiber-optic cable? -
## physics

if the wheel on a car accelerates from rest at a constant rate of 1.5rev/s, how fast will it be turning after 3s. -
## Physics

Find the maximum height reached by a ball thrown upward at a velocity of 95ft/s -
## physics

How fast must you lift a 3.60 kg container of milk if the power output of your arm is to be 21.3 W? how would i approach this question? would i still use P=W/T? -
## Physics

The hamiltonian shows you that the energy levels are purtered by the electric fields.The form of the matrix,you can see? -
## Physics 2

What quantity of heat is needed to convert 1kg of ice at -10C to liquid at 20C? -
## physics

at time t=0 the driver starts to brae determine how long the bus takes to stop -
## physics

A stone of mass m kg is held h metres above the floor 50s.The workdone in joules over this period is -
## Physics

Two electrons are fixed 2.99 cm apart. Another electron is shot from infinity and stops midway between the two. What is its initial speed? -
## PHYSICS

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet. -
## physics

An object is to be thrown through a window 3.5 m high a distance 7.5 m away. It is launched at an angle 70 degreesabove the horizontal. -
## Physics

This is about em spectrum? What are the effects of differences in the velocities of electromagnetic waves in different substances... long question -
## Physics

For the Law of Sines state the formulas, explain them in your own words, and draw a diagram illustrating one of them. -
## physics

Calculate the internal energy of 25.0 g of low-density oxygen gas (O2) at a temperature of 255 K. -
## Physics

How long does it take T-Rex to reach its food 200m away assuming that he starts from rest and accelerates at 4.00 m/s2? -
## physics

what is the wavelength of radar waves with the frequency of 6.0*10^10Hz? a. 0.0010m b.0.010m c.0.050m d.0.0050m -
## physics

What is the magnitude of the displacement of a car that travels half a lap along a circle that has a radius of 170m ? -
## principles of physics

Blood pressure is normally greater in your ____________________. A) arms.B) legs.C) head.D) feet.E) All the same -
## Physics

A dragster's top acceleration is 60m/s^2. If it accelerates for 3 seconds from the starting line, how fast will it be going? -
## Physics

Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at? Why? -
## Physics

a truck is traveling in a straight line goes 60km in 83minutes. what is its average speed in km per hour? -
## PHYSICS

A girl rows 10 km downstream in 2 h. Her return trip takes 4 h. How fast can she row in still water. in km/h? -
## Physics

Is it possible for the frictional force to increase the mechanical energy of a system? If so, give 2 examples with brief explanations. If not, why not? -
## Physics

A baseball is thrown horizontally from a height of 3.6 meters at a speed of 24 m/sec. How far will it travel along the ground? -
## physics

define black body, emissivity, solar constant in relation to heat transfer. -
## Physics

What is the frequency of an EM wave emitted most strongly by a glowing element on a stove with temperature 1500 K? -
## 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

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3. -
## physics

A body immersed in liquid has an upthrust of 140N with a density of 12kg calculate the velocity -
## physics

Compute the electric field about a uniformly charged plane sheet using gauss law. -
## physics

WHAT IS THE REASON BEHIND THE JISKHA"S TEACHERS TO BE NOTHING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(except Writeacher and STEVE) ARE THEY DAFT OR NUISANCE!!!!!!!!!!!!!!!!!! ANSWWER Me QUICKLY !!!!!!!!!!!!! -
## physics

an elevator weighing400kg is to be lifted up at a constant velocity of 3cms-1 what would be the minimum power of motor to be used -
## Physics

To what potential a sphere of radius 10cm be charged so that the surface density of charge is equal to 1 -
## physics

A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time?? -
## physics

A ball is thrown vertically upward with a velocity of 100m/s.It will reach the ground after hw many sec? -
## Physics

explain the concept of electric potential difference in terms of work done in transferring the charge -
## 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

If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves? -
## physics

suppose you apply 3 newtons of force to slide a box 2 meters in 6 seconds, how much work did you do? -
## 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 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules -
## Physics

A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules or J -
## Physics

"At what point between two masses of 20kg and 15kg located 1.0m apart, will the gravitational field strength equal zero?" -
## Physics

A stone with a mass of 20kg and density of 20,000kg/m3 is immersed in water. Find its weight -
## Physics

A rock is dropped from a height of 2 meters into a freshwater pond. How would I change the amplitude of this wave? -
## Physics

Two protons, an infinite distance apart are brought together to a separation of 1 nm. What is the initial potential energy of the system? -
## Physics

How many Joules of thermal energy must be added to 5 kg of water at 20 C to bring it to the boiling point (at 100 C)? -
## Physics

explain the concept of electric potential difference in terms of work done in transferring the charge -
## physics

Calculate the velocity time graph of a body at rest is given an initial uniform acceleration. -
## physics

if the shortest lenght of the tube for resonance is 0.1m and next resonanc length is 0.35m what is the frequency of the vibration. -
## Physics

a woman on a bridge 75 high sees a raft floating at a constant speed on the river below. -
## Physics-VECTORS

Find the vector's magnitude and direction. Part A A⃗ = 4 i^− 8 j^ A =? θA =? -
## physics

Calculate the velocity time graph of a body at rest is given an initial uniform acceleration . -
## Physics

What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m? -
## physics

what potential difference delta V is required to accelerate protons from the rest to 10% of the speed of light? -
## physics

What is the radius of an automobile tire that makes a complete turn in 0.1 sec and has a linear speed of 24.0 m/s? -
## Physics

Two objects are near a bar magnet. One is about 1 cm away, while the other is 6 cm away. Compare and contrast the magnetic force that affects each object. What do they want me to do? -
## Physics

A ball falling from rest is located 45 m below its starting point 3.0 s later. Assuming that its acceleration is uniform, what is its value? -
## physics/algebra

82.35 m = (0)t + 1/2(-9.8)t^2 t = 4.1 s is correct Could someone please walk me through this? I could not get an answer because of the negative (maybe my order of operations is wrong) I have no idea! -
## PHYSICS

A MACHINE HAS A VELOCITY RATIO OF 5 HAS AN EFFICIENCY OF 40.WHAT EFFORT WOULD BE NEEDED TO LIFT A LOAD OF 100N? -
## physics

Calculate the extension that would be produced by a 20N force if 15N extends a spring by 3cm -
## Physics

Newtons second law What net force acting on a 14kg wagon produces an acceleration of 1.5 m/s^2? -
## physics

At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 81 km/h to 117 km/h? -
## physics

How much heat is needed to convert 1.0kg ice at -5celsius to steam at 105 celsius? -
## Physics

A person is travelling 6 km (E) then 4 km (N) and finally 2 km (W). Calculate the average speed And velocity. Show your work -
## Physics

Express the angular velocity of 36 rpm (revolutions per minute) in units of radians per second (rad/s). -
## physics

Calculate the speed of sound wave in air if its frequencies and wavelengths are 256Hz and 1.32m -
## physics

If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point? -
## physics

If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point? -
## College Physics

How much would you have to raise the temperature of a copper wire (originally at 20 ∘ C) to increase its resistance by 30% ? -
## physics

A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water. True or False -
## physics

problem E2_2 Strain, boundary conditions, displacement and elongation: Part I Plz help. -
## Physics

Find the orbital velocity of a satellite orbiting 1800km above sea level in meters per second? -
## Physics

What is the centripetal acceleration of an automobile driving at 40 km/h on a circular track of radius 20m? Help ASAP please!!! -
## physics

A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively. -
## physics

A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively. -
## Physics

I don't understand any thing about the centripital force and torque please HELP me to solve problems about this topics. -
## physics

If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point? -
## Physics

Assume the distance axis is linear and da = 10.0m and db = 35.0 m. Estimate the work done by a force F in moving a 2.80 kg object from da to db. -
## Physics

What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m? -
## physics

A 0.0400 kg ice cube at -30.0°C is placed in 0.400 kg of 35.0°C water in a very well insulated container. What is the final temperature? -
## Physics

How many moles are there in a 30 cm diameter basketball at a pressure of 160 kpa and temperature of 25 degree celcius.