Sunday
May 29, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics
If 20g of water at 60 degree centigrade is mixed with 60g of water at 20 degree centigrade the resultant temperature is
Thursday, February 4, 2016 by Chanakya

Physics PLEASE PLEASE HELP! CONFUSED
I am so lost and confused right now with this question. I might have a quiz. Help me understand before this pop quiz!!!! THANKYOU A diver runs horizontally with a speed of 1.2 m/s off a platform that is 10.0 meters above the water. a) how long before the diver hits the water? ...
Wednesday, February 3, 2016 by Emma

physics
A cubical block of density rB and with sides of length L floats in a liquid of greater density rL. (a) What fraction of the block’s volume is above the surface of the liquid? (b) The liquid is denser than water (density rW) and does not mix with it. If water is poured on ...
Wednesday, February 3, 2016 by mary

Physics
A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 10.1 m/s at an angle of 62.4° above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its vertical speed ...
Wednesday, February 3, 2016 by Emily

physics
In the figure, three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T3 = 89.3 N. If m1 = 14.2 kg, m2 = 23.6 kg, and m3 = 32.3 kg, calculate (a) the magnitude of the system's acceleration, (b) the tension T1, and (c) the...
Wednesday, February 3, 2016 by patrick

Science physics
What is the magnitude of average force a pole vaulters exterts on a landing bag if it's 1.5 meters high and deforms by 0.5 M=60kg Height of the bar=4.5m His centre of mass is 1m
Wednesday, February 3, 2016 by Physics help on problem

True & False explanations Physics
When a projectile is fired at 45 deg. angle and is in free fall, the only point along the path that the acceleration of the object is zero is the instant when the object is at the highest point of its path. Answer: False Can someone explain how? 2.) An object with acceleration...
Wednesday, February 3, 2016 by Emma

physics
What potential difference is required to reduce the initial speed of the proton by a factor of 2? A proton has an initial speed of 3.1×105 m/s .
Wednesday, February 3, 2016 by Natalie

physics
A rocket is fired at a speed of 92.0 m/s from ground level, at an angle of 33.0 ° above the horizontal. The rocket is fired toward an 13.4-m high wall, which is located 26.0 m away. The rocket attains its launch speed in a negligibly short period of time, after which its ...
Wednesday, February 3, 2016 by koko

physics
A projectile starts from rest and moves 7 m down a frictionless ramp inclined at 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What will be the range of the projectile if the bottom of the ramp is 1.7 m above the ground? Answer in units of m.
Wednesday, February 3, 2016 by a

physics
A 0.46 kg mass is attached to a spring with a spring constant of 145 N/m so that the mass is allowed to move on a horizontal frictionless surface. The mass is released from rest when the spring is compressed 0.14 m. Find the acceleration of the mass at the instant the spring ...
Wednesday, February 3, 2016 by a

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west. a) Determine the magnitude and direction of the resultant force acting on the tree ...
Wednesday, February 3, 2016 by Beth

physics 2 HELP PLEASE!!
Can someone help break this down.. Please tell me if what I identified is so far correct. Also what equations should I use??? x1= 10m x2=? v1= 1.2 m/s v2=? a= -9.8 m/s^2 t= ? 1.) a diver runs horizontally with a speed of 1.2 m/s off a platform that is 10.0 meters above the ...
Wednesday, February 3, 2016 by Heather

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west.
Wednesday, February 3, 2016 by Beth

physics
I don't understand. derive a general equation that will predict the horizontal range of a projectile that is fired from one vertical position and ends at any other vertical position with an initial velocity, V1, at an angle, pheta, from the horizontal. The equation should ...
Wednesday, February 3, 2016 by Emma

physics
A positive charge of 0.0001258 C experiences a force of 0.3 N when located at a certain point. What is the electric field magnitude at that point? Answer in units of N/C.
Wednesday, February 3, 2016 by sami

physics
Three point charges, two positive and one negative, each having a magnitude of 30 µC are placed at the vertices of an equilateral triangle (43 cm on a side). What is the magnitude of the electrostatic force on one of the positive charges? The value of the Coulomb ...
Wednesday, February 3, 2016 by sami

Physics
A car goes from 12 m/s to 25 m/s in 6.0 seconds. a.) What is the acceleration of the car? b) How far did it travel in the 6.0 seconds?
Wednesday, February 3, 2016 by Diana

physics
I don't understand. derive a general equation that will predict the horizontal range of a projectile that is fired from one vertical position and ends at any other vertical position with an initial velocity, V1, at an angle, pheta, from the horizontal. The equation should ...
Wednesday, February 3, 2016 by Emily

Physics
A city planner is working on the redesign of a hilly portion of the road. An important consideration is how steep the road can be so that even a low-powered car can get up the hill without slowing down. A particular small car with a mass of 1368 kg can accelerate on a flat ...
Wednesday, February 3, 2016 by Ron

Physics
a car moving at 10 metre per second was uniformly accelerated until it's velocity reaches 20 metre per second.It then maintains this speed for another 20s after which the brakes were applied and the vehicle was finally brought to rest after 10 seconds
Wednesday, February 3, 2016 by Ayomide

Physics
A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 3.70 103 m. During this performance the pilot whose weight is 740 N, maintains a constant speed of 2.25 102 m/s. (a) When the pilot is at the highest point of the loop determine his apparent ...
Wednesday, February 3, 2016 by Bust Nuttington

physics
A fireman d = 56.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of θi = 24.0° above the horizontal as shown in the figure. If the speed of the stream as it leaves the hose is vi = 40.0 m/s, at what height will the ...
Wednesday, February 3, 2016 by mary

physics
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground to reach that height? answer in (m/s)
Wednesday, February 3, 2016 by mary

Physics
A 2.19 kg block is held in equilibrium on an incline of angle q = 55.0o by a horizontal force, F, applied in the direction shown in the figure below. If the coefficient of static friction between block and incline is ms = 0.283, determine the minimum value of F. Determine the ...
Wednesday, February 3, 2016 by Weeks

physics
An aeroplane is moving at 200km/h due 60?. The plane experience a wind blowing at 120km/h due 210?. Find the resultant velocity of the plane by resolving the velocities into their components
Wednesday, February 3, 2016 by laban

Physics
Consider a plane with a velocity relative to the air of 195 m/s in a westerly direction. If the wind has a speed relative to the ground of 53 m/s (in an easterly direction), how long does it take for the plane to travel from one city to another that is due west of the first by...
Wednesday, February 3, 2016 by Heather

Physics
Sound from a 55dB horn is measured at a distance. What is the intensity of the sound in W/m2?
Wednesday, February 3, 2016 by Allan

physics
Suppose 3.0 cm of rain at 10°C falls on a rectangular region of dimensions 2.0 km x 3.0 km. How much energy was released when water vapor condensed to form this amount of rain?
Wednesday, February 3, 2016 by jan

physics
0.50 L of water at 16°C is poured into an aluminum ice cube tray of mass 0.250 kg at the same temperature. How much energy must be removed from this system by the refrigerator to turn the water into ice at -8°C?
Wednesday, February 3, 2016 by jan

physics
Ice is added to 0.75 L of water at 20°C to make very cold water at 0°C. If enough 0°C ice is added so that the mixture becomes all liquid, how much liquid is in the pitcher when this occurs? Density of water = 1.00 x 103 kg/m3.
Wednesday, February 3, 2016 by jan

physics
A stone is projected vertically upward with a speed of 20 m/s. a. What is its velocity at the end of 2s? b. What is the height reacted after 2s?
Wednesday, February 3, 2016 by Lara

physics
Two trucks A and B each travelling at 40 km/hr, move towards each other . At the instance when the two trucks are at a distance 50 km from one another, a car moving at 60 km/hr overtakes A. How far behind the car is A at the point when the car meets B?
Wednesday, February 3, 2016 by jay

Physics (Torque)
Your hand holds a litter of milk while your arm is bent at the elbow in a 90 degree angle. Estimate the torque caused by the milk on your arm about the elbow joint. Indicate all numbers used in your calculations.
Tuesday, February 2, 2016 by Matt

Physics
A bat moving at 5 meters per second is chasing a flying insect, if the bat emits a 40 khz chirp and receives back an echo at 40.4 khz what is the speed of the insect and will the bat be able to catch the insect?
Tuesday, February 2, 2016 by Chris

physics
Find the distance between the two electrons. The value of the Coulomb constant is 8.98755 × 109 N · m2 /C 2 and the acceleration of gravity is 9.81 m/s 2 . 1. 0.507424 m 2. 50.7424 m 3. 5.07424 km 4. 5.07424 m 5. 5.07424 cm can anybody help me please
Tuesday, February 2, 2016 by sami

Physics
A block of weight 41.8 N is hanging from a rope. The tension in the rope is 24.4 N, pulling upward on the block. What is the magnitude and direction of the acceleration of the block? I know the direction would be downwards, since the tension of the rope is less than the weight...
Tuesday, February 2, 2016 by Emily

ap physics
a rope is strung between two cliffs. A mountain climber weighing 100 kg is halfway across the rope when the rope forms an angle of 45 degrees with the horizontal. The tension in the rope is closest to what value?
Tuesday, February 2, 2016 by Kathleen

physics
why , regardless of the magnitude of the initial velocity, the maximum horizontal displacement for a projectile occurs when the angle is 45 degrees. Specifically, what happens when the angle is increased or decreased. How would you mention vector components and also ...
Tuesday, February 2, 2016 by Madi

physics
The membrane that surrounds a certain type of living cell has a surface area of 4.50 × 10-9 m2 and a thickness of 1.00 × 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.3. The potential on the outer ...
Tuesday, February 2, 2016 by jared

Physics
This is another question I had too and didn't understand as well. Vector Addition: Use the head to tail method to determine the resultant vector of the following velocity vectors. V1= 540m/s @66 degrees V2= 12m/s @182 degrees V3= 96m/s @312 degrees V4= 332m/s @261 degrees
Tuesday, February 2, 2016 by Dina

Physics
Vector Addition: I know you can't physically do drawings on this site. Is there a way of someone explaining how to begin with this problem. Can I chose any scale. The directions said to use the head to tail method to determine the resultant vector of the following velocity...
Tuesday, February 2, 2016 by Dina

Physics
A block of mass 4.11 kg is hanging from a rope. The tension in the rope is 23.5 N, pulling upward on the block. What is the magnitude and direction of the acceleration of the block? F=ma 23.5=4.11a The result was 5.72 and was not correct. Please help!
Tuesday, February 2, 2016 by Emily

Physics
A hollow sphere has a uniform volume charge density of 2.22 nC/m3. The inner radius is a = 12.2 cm and the outer radius is b = 24.4 cm. What is the magnitude of the electric field at 18.3 cm from the center of the sphere? What is the magnitude of the electric field at 78.1 cm ...
Tuesday, February 2, 2016 by Michael

Ap Physics
Ball A,with a mass of 1.75kg,moves with a velocity of 3.50 m/s. It collides with a stationary ball B, with a mass of 2.50kg. After the collision, ball A moves in a direction of 55° to the left of its original direction, while ball B moves in a direction 35° to the ...
Tuesday, February 2, 2016 by Shelton

PHYSICS:
find the maximum velocity of a swingling pendulum bob.Hint potential energy(P.E)=kinetic energy(K.E)
Tuesday, February 2, 2016 by CHIDIEBERE

physics
a block of mass m is placed on a smooth turntable at a distance of 20cm from the centre.a string is tied to the block and its other end passed through a gole in the centre of the table.A 2nd block of mass m is suspended from the free end of the string as shown in fig.At what ...
Tuesday, February 2, 2016 by Rutvik

Physics
A metal ball of mass 2kg is allowed to fall freely from rest from height of 5m. Calculate potential energy it possesses and kinetic energy before it reaches the ground. What happens to mechanical energy of the ball after it hits the ground?
Tuesday, February 2, 2016 by Angela

Physics
A Boeing 747 has a mass of 400,000kg and a takeoff speed of 100m/s . It cruises at a height of 10,000m at a speed of 255m/s
Tuesday, February 2, 2016 by Darth vader

physics
1. A 50.0 Lb box is to be moved along a rough floor at a constant velocity. The coefficient of the kinetic friction is 0.300. A. What force must you exert if you push downward on the box? B. What force must you exert if you pull upward on the box? C. Which is the better way to...
Tuesday, February 2, 2016 by Anonymous

physics
A ball is thrown vertically upword with an initial velocity of 40m/s (1) calculate 1 it velocity after 3secs (2) the maximum height attend and the time taken to reach the maximum height (3) the total taken for the ball to return to the grand again
Tuesday, February 2, 2016 by TLIMAN

Physics
Work Function 1 > Work Function 2 In which case will the Kinetic energy of the emitted electrons be greater ?
Tuesday, February 2, 2016 by Minhye

Physics
why do photoelectrons emitted from a metal surface has energy distribution for an incident radiation of frequency?
Tuesday, February 2, 2016 by Minhye

Science (physics)
Before Felix enters the capsule, what can we say about his gravitational potential energy and kinetic energy?
Monday, February 1, 2016 by elle

Physics
a projectile is fired horizontally outward from the top of a table. the initial height of the bullet above the ground is 1.5 meters and the bullet travels a horizontal distance of 3.0 meters before striking the ground. Calculate the time bullet was in the air, B)muzzle(initial...
Monday, February 1, 2016 by Rosi

Physics
A Styrofoam bucket of negligible mass contains 1.75 kg of water and 0.450 kg of ice. More ice, from a refrigerator at -15.0∘C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket is 0.884 kg. Assuming ...
Monday, February 1, 2016 by Jen

Physics please i really need help
Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.427 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 9.00 m/s2. What is the stopping distance of the car, as measured from the point where...
Monday, February 1, 2016 by Erica

Physics
What is the average linear speed of Mercury about the Sun? (The distance from the Sun to Mercury is 5.80 1010 meters. The orbital period around the Sun is 88 days.)
Monday, February 1, 2016 by Melanie

Physics HELPPP
(0 m/s)^2 - (23.7 m/s)^2 divided by 2(9.00 m/s)^2 ?
Monday, February 1, 2016 by Erica

physics
a bullet of mass 20g travelling at 16m/s penetrates a brock of wood and it comes to rest in 0.5seconds.find(a)the acceralation (b)the average redating force(c)the depth of the penetration
Monday, February 1, 2016 by luckson mulanshi

Physics
Why are electrons allowed to fall on a crystal plate for diffraction ?
Monday, February 1, 2016 by Minhye

physics
Falls resulting in hip fractures (or head injuries) are a major cause of injury and even death to the elderly. Typically, the hip’s speed at impact is about 2.0 meters per second. If this can be reduced to 1.3 meters per second or less, the hip will usually not fracture. ...
Monday, February 1, 2016 by tommy

physics
Falls resulting in hip fractures (or head injuries) are a major cause of injury and even death to the elderly. Typically, the hip’s speed at impact is about 2.0 meters per second. If this can be reduced to 1.3 meters per second or less, the hip will usually not fracture. ...
Monday, February 1, 2016 by tom

physics
It has been suggested, and not facetiously, that life might have originated on Mars and been carried to Earth when a meteor hit Mars and blasted pieces of rock (perhaps containing primitive life) free of the surface. Astronomers know that many Martian rocks have come to Earth ...
Monday, February 1, 2016 by tom

Physics
A jeepney slows down from 10 m/s to 4 m/s in 6 s. What is the distance covered?
Monday, February 1, 2016 by Anonymous

physics
Mars has a radius of about 0.38 Earth radius and a mass of only 0.11 Earth mass. Estimate the acceleration due to gravity on Mars.'
Monday, February 1, 2016 by ang

physics
Mars has a radius of about 0.38 Earth radius and a mass of only 0.11 Earth mass. Estimate the acceleration due to gravity on Mars.
Monday, February 1, 2016 by ang

Physics
A 112 g hockey puck glides across a frictionless ice surface with no horizontal forces acting on it. If the puck's velocity is 22.5 m/s to the right at t = 0 s, what will the puck's horizontal velocity be at t = 225 ms? Round your answer to the nearest 0.1 m/s.
Monday, February 1, 2016 by Anonymous

Physics HELP!!
From the top of a cliff overlooking a lake, a person throws two stones, as shown in the drawing. The cliff is 39.2 m high. The two stones described have identical initial speeds of v0 = 19.2 m/s and are thrown at an angle θ = 29.2 °, one below the horizontal and one ...
Monday, February 1, 2016 by James Houl

Physics
The initial velocity and acceleration of four moving objects at a given instant in time are given in the following table. Determine the final speed of each of the objects, assuming that the time elapsed since t = 0 s is 2.0 s. Initial Velocity (a) +12 m/s (b) +12 m/s (c) -13 m...
Monday, February 1, 2016 by Erica

Physics
From the top of a cliff overlooking a lake, a person throws two stones, as shown in the drawing. The cliff is 39.2 m high. The two stones described have identical initial speeds of v0 = 19.2 m/s and are thrown at an angle θ = 29.2 °, one below the horizontal and one ...
Monday, February 1, 2016 by James Houl

Physics
A freight train has two engines, each with a mass of 50,000kg, pulling 15 freight cars, each having a mass of 40,000kg.The
Monday, February 1, 2016 by Pious

physics
a uniform beam 6.0 metre long and weighing 4kg rests on support at p and q placed left and right 1.0 metres from each end of the beam weights of mass 10 kg and 8kg are placed near p and q respectively one each end of the beam.calculate the reaction at p and q?
Monday, February 1, 2016 by mary

Physics
A jet aircraft rolls onto the end of a runway before accelerating down the runway for takeoff. At the point where the aircraft leaves the ground, it is traveling at 100 m/s. If the aircraft's initial speed when it rolled onto the runway was 10 m/s, and it accelerates for ...
Sunday, January 31, 2016 by Matt

Physics
If the maximum current in an LR circuit is 2 A what is the instantaneous current at t= time constant of the circuit?
Sunday, January 31, 2016 by Minhye

physics
A particle moving in simple harmonic motion passes through the equilibrium point x=0, 3 times per second. At t=0 its velocity at x=−0.0325m is negative. It travels 0.5m in a complete cycle. a) what is the phase constant in cm. i found the equation: x(t)=12.5sin(3pi t +x...
Sunday, January 31, 2016 by maryam

Physics
A 300g particle oscillating in SHM travels 11cm between the two extreme points in its motion with an average speed of 65 cm/s. a) Find the angular frequency b)The maximum force on the particle c)The maximum speed
Sunday, January 31, 2016 by sarah

Physics
An air-filled parallel plate capacitor has a capacitance of 37 pF. (a) What is the separation of the plates if each plate has an area of 0.8 m2? (cm) (b) If the region between the plates is filled with a material with κ = 5.0, what is the final capacitance? (pF)
Sunday, January 31, 2016 by Anonymous

Physics
(a) What is the electric potential V at a distance r = 3.1 10-8 cm from a proton? (V) (b) What is the electric potential energy in units J and eV of an electron at the given distance from the proton? (J) (eV)
Sunday, January 31, 2016 by Anonymous

Physics
We study the three point charges. They are held at the corners of an equilateral triangle with ℓ = 0.7 m. What is the electric potential energy of the system of three point charges? Use for the three charges q1 = +2Q, q2 = −3Q, q3 = +Q, where Q = 120 nC
Sunday, January 31, 2016 by Anonymous

Physics
Consider a circular track with a radius of 200 meters. A runner starts on the east side and runs around the track to a point diametrically opposite her starting point. -What is the magnitude of her displacement? 400m -She then runs the rest of the way around the track to ...
Sunday, January 31, 2016 by Terry

physics
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.55 m/s. The car is a distance d away. The bear is 17.1 m behind the tourist and running at 4.84 m/s. The tourist reaches the car safely. What is the maximum possible value for d?
Sunday, January 31, 2016 by Kim

physics
A blue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.2 m/s2. A green car arrives at the position of the stop-light 7.5 s after the light had turned green. What is the slowest constant speed which the green car can ...
Sunday, January 31, 2016 by hannah

Physics
A cannonball is fired with initial speed v0 at an angle 30° above the horizontal from a height of 42.9 m above the ground. The projectile strikes the ground with a speed of 1.2v0. Find v0.
Sunday, January 31, 2016 by Nicole

Physics
An arrow is shot from a height of 1.5 m toward a cliff of height . It is shot with a velocity of 30 m/s at an angle of 60 deg above the horizontal. It lands on the top edge of the cliff 4.0 s later. (a) What is the height of the cliff? (b) What is the maximum height reached by...
Sunday, January 31, 2016 by Jeff

physics
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 205 mi/h in 2.70 s. (a) Find the average acceleration of the plane. (answer in m/s^2) (b) Assuming the acceleration is constant, find the distance the plane moves. answer ...
Sunday, January 31, 2016 by joanna

physics
A ball is thrown directly downward with an initial speed of 8.95 m/s, from a height of 29.0 m. After what time interval does it strike the ground? answer in (in seconds)
Sunday, January 31, 2016 by joanna

physics
A ball is thrown vertically upward with a speed of 19.0 m/s. (a) How high does it rise? (in meters) (b) How long does it take to reach its highest point? (in seconds)
Sunday, January 31, 2016 by joanna

physics Help please!
h(m) KE (J) PEgravity (J) PEelastic (J) E 0 ______ _________ _________ __ 0.2 ______ _________ __________ ___ 0.4 ______ _________ __________ __ A 2.40-kg object is hanging from the end of a vertical spring. The spring constant is 31.0 N/m. The object is pulled 0.200 m ...
Sunday, January 31, 2016 by mike

Physics
What is the likely identity of a substance (see Table 10-1) if a sample has a mass of 9.38 g when measured in air and an apparent mass of 8.55 g when submerged in water? A)Copper B)Iron or steel C)Aluminum D) Lead E)Concrete F)Gold
Sunday, January 31, 2016 by Larisa

Physics
Suppose a soccer player kicks the ball from a distance 30 m toward the goal. Find the initial speed of the ball if it just passes over the goal, 2.4 m above the ground, given the initial direction to be above the horizontal.
Sunday, January 31, 2016 by Drew

physics
Two force of 5n and 12n respectively act on the same point.show how you would determine the magnitude of the resultant by using the tail- to head and tail to tail methods and Pythagoras theorem (13n)
Sunday, January 31, 2016 by Bontle Letsoalo

Physics
A speaker has a diameter of 0.303 m. (a) Assuming that the speed of sound is 343 m/s, find the diffraction angle è for a 1.80-kHz tone. (b) What speaker diameter D should be used to generate a 3.72-kHz tone whose diffraction angle is as wide as that for the 1.80-kHz ...
Sunday, January 31, 2016 by Japhet

Physics
I'm preparing for a test. Can anyone check my answer for all these questions? These are my questions: 1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] ...
Sunday, January 31, 2016 by Matt Damon

physics
what is tripple point?
Sunday, January 31, 2016 by promise

physics
Imagine a parallel universe in which the electric force has the same properties as in our universe but there is no gravity. In this parallel universe, the sun carries charge Q, the earth carries charge −Q, and the electric attraction between them keeps the earth in orbit...
Sunday, January 31, 2016 by jack

physics
An electron is projected with an initial speed of (1.90x10^6 m/s) into the uniform field between two parallel plates. Assume that the field between the plates is uniform and directed vertically downward, and that the field outside the plates is zero. The electron enters the ...
Sunday, January 31, 2016 by jack

Phys´cs
A body is displaced through a certain distance x by a force of 30 newtons.if the work done is 100 joules and the displacement is in the direction of force,what is the value of x?
Sunday, January 31, 2016 by CHIDIEBERE

PHYSICS:
A boy weighing 350N runs up a flight of stairs consisting of 20 steps each 10 cm high in 10 seconds.what is his power?
Sunday, January 31, 2016 by CHIDI

physics
A ball is thrown directly downward with an initial speed of 8.95 m/s, from a height of 29.0 m. After what time interval does it strike the ground?
Sunday, January 31, 2016 by joanna

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