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September 23, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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Physics
A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.51s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s
Friday, August 30, 2013 at 4:41pm

physics
A softball player hits the ball and starts running towards first base. Draw a motion diagram, using the particle model, showing her position and her average velocity vectors for the first few seconds of her run.
Friday, August 30, 2013 at 1:51pm

Physics
“Strontium-90 is a pure beta source.” How could a physicist test this statement? I am stuck on this one, but I was thinking through measurement of radioactivity.
Friday, August 30, 2013 at 11:52am

Physics
Using the scale (1 light-minute equals 10 mm), how many millimeters represent a light year? On this scale, what is the distance from Earth to the nearest star? To the Andromeda Galaxy? (Note that 1 meter = 103 mm and that 1 km = 103 meters.)
Friday, August 30, 2013 at 8:25am

Physics
The information from an internet web host may sometimes reach your computer by traveling as light to a satellite approximately 3.6 x 107 meters above Earth's surface and back again. What is the minimum time, in seconds, that the information takes to reach your computers?
Friday, August 30, 2013 at 8:02am

physics
a child holds a sled at rest on a frictionless snow covered hill. if the sled weighs 77newtons. find the force exerted on the rope by the child and the force on the rope exerted by the sled by the hill?
Friday, August 30, 2013 at 6:49am

Maths/Physics
An athlete is training and is required to perform shuttle runs. From the starting position they sprint out to 10m (this takes 2 seconds). I know that a = 5m/s/s but I need to know at what metre within the run would maximum acceleration occur. Appreciate your help. thanks
Thursday, August 29, 2013 at 6:54pm

Physics URGENT HELP
An athlete is training and is required to perform shuttle runs. From the starting position they sprint out to 10m (this takes 2 seconds). Where would the maximum acceleration occur? Justify your answer. Please help! Thankyou.
Thursday, August 29, 2013 at 6:12pm

Physics
A stone is thrown vertically upward with a speed of 19.0m/s How fast is it moving when it reaches a height of 10.0m
Thursday, August 29, 2013 at 5:17pm

College Physics II (Calc-Based)
In state-of-the-art vacuum systems, pressures as low as 1.00 x 10^-9 Pa are being attained. Calculate the number of molecules in a 1.90-m^3 vessel at this pressure and a temperature of 35.0°C. Okay. So I know I have to use the Ideal Gas Law, PV = nRT, I then transformed it...
Thursday, August 29, 2013 at 4:47pm

AP Physics
#2 A spy stands on the sidewalk by an apartment building examining a foreign embassy across the street. The spy then climbs 30 m to the top the building and then slides 40 m along a wire at a 20° angle below right to reach a window on the embassy. What is their total ...
Thursday, August 29, 2013 at 2:36pm

Physics
Consider a radioactive sample with a half-life of one week. How much of the original sample will be left at the end of the second week? The third week? The fourth week?
Thursday, August 29, 2013 at 2:13pm

physics
the rubber cord of a sling shot has a cross section 2.0 millimetre squared, and an initial length of 20 centimetres. The cord is stretched to 24 centimetres to fire a small stone of mass 10 grams. Assuming that elastic limit is not exceeded, calculate the initial speed of the ...
Thursday, August 29, 2013 at 8:38am

Physics
An athlete is training and is required to perform shuttle runs. From the starting position they sprint out to 10m (this takes 2 seconds). Where would the maximum acceleration occur? Justify your answer. Please help! Thankyou.
Thursday, August 29, 2013 at 7:05am

physics
The chain is released from rest with a length b of overhanging links just sufficient to initiate motion. The coefficients of static and kinetic friction between the links and the horizontal surface have essentially the same value, μ. Determine the velocity v of the chain ...
Thursday, August 29, 2013 at 6:18am

physics
you walk north for 2.5 miles. Then you walk east a distance of 3 miles. How many miles from the starting point are you?
Thursday, August 29, 2013 at 12:15am

physics
A commuter backs her car out of her garage with an acceleration of 1.6 m/s2. How long does it take her to reach a speed of 2.3 m/s in seconds
Thursday, August 29, 2013 at 12:13am

Intro to Physics
With scanning probe microscopy technology, we see not actual atoms but rather images of them. Explain.
Wednesday, August 28, 2013 at 11:43pm

Physics
A car accelerates at a constant rate from zero to 23.3 m/s in 10 seconds and then slows to 15 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s^2 during the 15 seconds?
Wednesday, August 28, 2013 at 10:34pm

Physics
A car travels in a straight line with an average velocity of 80 km/hr for 2.5 hours and then with an average velocity of 40 km/hr for 1.5 hours. a. Calculate the largest displacement for the 4-hour trip. b. Calculate the largest average velocity for the total trip in ...
Wednesday, August 28, 2013 at 9:54pm

Physics
I am confused, selenium Se, is on the periodic table, but does it combine with other elements on the periodic table? I want to say no because it is a gas. Is that correct.
Wednesday, August 28, 2013 at 9:52pm

Physics
If theta equals 60 and F equals 450 Newtons, determine the magnitude of the resultant force and its direction, measured counterclockwise from the positive x axis.
Wednesday, August 28, 2013 at 3:44pm

Physics
What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 µC and a = 2.50? (The positive direction is to the right.)
Wednesday, August 28, 2013 at 3:40pm

Physics
If two protons and two neutrons are removed from the nucleus of an oxygen-16 atom, a nucleus of which element remains? Carbon 12 will be the answer, but i need to understand the answer. I requested help from a friend but was given the answer and not explained. I am having a ...
Wednesday, August 28, 2013 at 2:37pm

Physics
When point charges q1=+8.4uC and q2=+5.6uC are brought near each other, each experiences a repulsive force of magnitude 0.66N. Determine the distance between the charges.
Wednesday, August 28, 2013 at 9:15am

Physics
When point charges q1=+8.4uC and q2=+5.6uC are brought near each other, each experiences a repulsive force of magnitude 0.66N. Determine the distance between the charges.
Wednesday, August 28, 2013 at 9:14am

Physics
When point charges q1=+8.4uC and q2=+5.6uC are brought near each other, each experiences a repulsive force of magnitude 0.66N. Determine the distance between the charges.
Wednesday, August 28, 2013 at 9:08am

physics
The dome of a Van de Graaff generator has a diameter of 32.0 cm and is surrounded by dry air with a 'breakdown' electric field of 3.00 106 V/m. What is the maximum potential of the dome?
Wednesday, August 28, 2013 at 7:55am

physics
A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of −8.50 ìC. Find the electric potential at O, the centre of the semicircle.
Wednesday, August 28, 2013 at 7:54am

physics
A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of −8.50 ìC. Find the electric potential at O, the centre of the semicircle.
Wednesday, August 28, 2013 at 7:54am

physics
Two charges Q 1 =500/mu(C) and Q 2 =100/mu(C) are located on the XY plane at the positions r1=3/vec(j)m and r2=4/vec(i)m. Find the force exerted on the Q2(a)14.4/vec(i)+10.8/vec(j)(b)14.4/vec(​i)-10.8/vec(j)N(c)10.8/vec(i)-14.4/vec(j​)N(d)10.8/vec(i)+14.4/vec(j)N
Wednesday, August 28, 2013 at 3:41am

physics
A tiny ball of mass 0.60g is suspended from a rigid support with a piece of thread in a horizontal field of intensity 700N/C.The ball is in equilbrum when the thread is inclined at an angle of 20^(0) to the vertical.What are the magnitude and sign of the charge on the ball?...
Wednesday, August 28, 2013 at 2:52am

physics
The electric potential difference between two points A and B is 42v.What is the work done by an external agent in carring a charge of 0.00005c from A to B at constant speed? (a)0.002.1j(b)0.0008.4j(c)0.00021j(d)0.0​084j
Wednesday, August 28, 2013 at 2:33am

physics
The electron beam in a television tube consist of electrons accelerated from rest through a potential difference of about 20000v. What is the speed of the electrons?(ignore relativistic effects). Electron rest mass is 9.11/times10^(-31)kg and electronic charge is 1.6/ times10...
Wednesday, August 28, 2013 at 2:20am

physics
Two large horizontal metal plates are separated by 4mm. The lower plate is at a potential of (-)6v.What potential should be applied to the upper plate to create field strength of 4000v/m upwards in the space between the plates?(a)(+)22(b)(+)10(c)(-)10(d)(-)22
Wednesday, August 28, 2013 at 2:01am

Science , physics
At the beginning of an invertigation , a student determines that the temp. of a beaker of water is 99.8+_ 0.1C . At the end of the investigation , the temp. Is 35.5+_ o.1C . What is the change in temp.?? My answer is 64.5+_ 0.2 C . Is this right ? Thank you!
Tuesday, August 27, 2013 at 10:51pm

physics
What is the force on the charge located at x = +8.00 cm. q = 1.00 µC and a = 8.00? (The positive direction is to the right.)
Tuesday, August 27, 2013 at 10:43pm

physics
Bees often work together for the greater good of the hive. Sometimes they can get excess charge on them. Four pairs of bees, which can be represented as identical, conducting spheres, bump into each other in the hive. Rank the bees in the order of the size of the magnitude of ...
Tuesday, August 27, 2013 at 10:42pm

Physics
(1) What is the linear speed of the earth in its orbit about the sun? Give your answer in meters per second. (Consider the earth's orbit to be a circle of radius 1.50×1011 m.) (2) What is the linear speed of Jupiter in its orbit about the sun? Give your answer in ...
Tuesday, August 27, 2013 at 7:54pm

physics
A speeder traveling at a constant speed of 125km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (8.0km/h)/s until it reaches its maximum speed of 190km/h, which it maintains until it catches up with the speeder. (a) How long does it take...
Tuesday, August 27, 2013 at 7:16pm

Physics ...
Can anyone tell me what this symbol means μu What does it mean in therm of values such as AMUs like 170604μu Thanks
Tuesday, August 27, 2013 at 5:17pm

AP Physics
I need someone to review the following questions for my summer assignment and tell me if my answers are right or wrong. Please do it carefully, and the problems I found to be the most trickiest were #2 and #5. (This is is AP physics) #1 In a pickup football game, a receiver ...
Tuesday, August 27, 2013 at 3:27pm

Physics
Standing side by side, you and a friend step off a bridge at different times and fall for 1.41 s to the water below. Your friend goes first, and you follow after she has dropped a distance of 1.93 m. (a)How long does it take your friend to fall 1.93 m? (b)What is the ...
Tuesday, August 27, 2013 at 1:22pm

Physics
What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 µC and a = 2.50? (The positive direction is to the right.)
Tuesday, August 27, 2013 at 11:58am

Maths / physics
Calculate the rest mass (In grams) of an object whose rest energy is equal to the energy released by a tonne of tnt the energy liberated by 1 g of tnt = 4kJ Rest energy = moc 2 1 tonne of tnt equals 10^6 x 4kJ = 4 x 10^6 kJ x (3.0^8)sqrd = 3.6 x 10^23kJ is this right ?? i ...
Tuesday, August 27, 2013 at 10:37am

PHYsics !!
a) What do you understand by Simple Harmonic Motion? b) A simple harmonic motions is characterized by the equation x = (10 cm) sin (0.1t + ) where, x is in cm and t is in seconds Determine the i. amplitude and angular frequency. ii. linear frequency and period. iii. ...
Tuesday, August 27, 2013 at 9:32am

Physics
A hydrogen atom has a diameter of about 10.1 nm. Express this diameter in meters.
Monday, August 26, 2013 at 10:14pm

Physics ...
Can anyone help me to calculate the energy released when 7Li and a deuteron (d) fuse to form 9Be, Given only mass excess 7Li 16004 uu, d 14102 uu , and 9Be 12182 uu uu might be microunit perhaps ??? Thank you explanation would be good thanks
Monday, August 26, 2013 at 9:37pm

physics
Find the area of a rectangle whose sides are 12.68 cm and 98.5 mm.
Monday, August 26, 2013 at 8:35pm

Physics
Displacement vector A points due east and has a magnitude of 2.26 km. Displacement vector B points due north and has a magnitude of 2.62 km. Displacement vector C points due west and has a magnitude of 2.6 km. Displacement vector D points due south and has a magnitude of 2.6 ...
Monday, August 26, 2013 at 5:52pm

Physics ...
Can anyone help me to calculate the energy released when 7Li and a deuteron (d) fuse to form 9Be, Given only mass excess 7Li 16004 uu, d 14102 uu , and 9Be 12182 uu uu might be microunit perhaps ??? Thank you explanation would be good thanks
Monday, August 26, 2013 at 4:38pm

physics
An army tank division leaves base and travels 30 miles at 30° S of W and then turns and travels 70 miles at 10° N of W. What is their total displacement from base at the end of the trip? the answer i got is 94.96, what did you get?
Monday, August 26, 2013 at 4:18pm

physics
A spy stands on the sidewalk by an apartment building examining a foreign embassy across the street. The spy then climbs 30 m to the top the building and then slides 40 m along a wire at a 20° angle below right to reach a window on the embassy. What is their total ...
Monday, August 26, 2013 at 3:23pm

Physics
In a vacuum, two particles have charges of q1 and q2, where q1 = +3.8C. They are separated by a distance of 0.37 m, and particle 1 experiences an attractive force of 4.7 N. What is the value of q2, with its sign? Two spherical objects are separated by a distance of 1.45 ×...
Monday, August 26, 2013 at 1:45pm

Physics ...
Can anyone help me to calculate the energy released when 7Li and a deuteron (d) fuse to form 9Be, Given only mass excess 7Li 16004 uu, d 14102 uu , and 9Be 12182 uu uu might be microunit perhaps ??? Thank you explanation would be good thanks
Monday, August 26, 2013 at 12:17pm

Science Physics
Calculate the time it takes for the voltage across the resistor to reach 11.0V after the switch is closed. the total resistance is 10.0kΩ , and the battery's emf is 27.0V . If the time constant is measured to be 34.0μs .
Monday, August 26, 2013 at 11:49am

physics
1] What is ZX applied to |0>? 2] What is ZX applied to H|0>? 3] Suppose we have a qubit in the state |ψ⟩. We know that if we measure it in the standard basis, the probability of getting a 0 is 29. Now, if we instead first apply a Hadamard gate and then ...
Monday, August 26, 2013 at 11:38am

physics
Which of the following pairs of quantum gates commute? Select all that apply. (Gates A and B commute if and only if for any input applying A and then B gives the same results as applying B and then A. This is the same as saying that the unitary transformations commute.) a) I ...
Monday, August 26, 2013 at 11:36am

Physics !!
1) A stone is dropped from the roof of a building; 2.00 s after that, a second stone is thrown straight down with an initial speed of 25 m/s and the two stones land at the same time. i) How long did it take the first stone to reach the ground? ii) How high is the building? iii...
Monday, August 26, 2013 at 8:45am

physics
A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.
Monday, August 26, 2013 at 4:36am

physics
A circular coil with a radius of 25 cm has 20 turns. The coil is oriented perpendicularly to a magnetic field whose initial magnitude is 3.2 T. Suddenly, the magnetic field vanishes in 0.4 s. a. What is the initial magnetic flux in the coil? b. What is the induced emf in the ...
Monday, August 26, 2013 at 3:51am

physics
a coin is thrown horizontally with a speed of 12m/s from the top of a bridge . if the coin strikes the sea water below the bridge after 3 find the height of the bridge above sea level
Monday, August 26, 2013 at 3:22am

physics
(a) Two point charges totaling 8.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.839 m. What is the charge on each? smallest charge (µC) largest charge (µC) (b) What is the charge on each if the force is attractive? smallest charge...
Monday, August 26, 2013 at 12:09am

physics
A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of the copper's electrons have been removed? (Each copper atom has 29 protons, and copper has an atomic mass of 63.5.)
Monday, August 26, 2013 at 12:08am

Physics
A car traveling at 11m/s accelerates to 2.82m/s^2 for 13 seconds how far does the car travel?
Sunday, August 25, 2013 at 9:24pm

physics
The mass of a solid cube is 1200 g, and each edge has a length of 4.15 cm. Find the density of the cube. Answer in units of kg/m^3
Sunday, August 25, 2013 at 3:23pm

physics
an elevator and its load have a total mass of 1000kg. find the tension in the supporting cable if the elevator originally moving downward at 10m/s is brought to rest with a constant acceleration after moving a distance of 50m
Sunday, August 25, 2013 at 2:15pm

physics
Two resistances 2omega and 3omega are in parallel. The combination is in series with 15omega resistance and a power supply of voltage V. There is a current of 3omega resistance. What are the values of the current and votage across the power supply (a)3a and 10.5v(b) 4a and 9v...
Sunday, August 25, 2013 at 11:56am

Physics
I have tried breaking down a periodic table for children. We have to do things where they can understand. I need some help with this one. What type of items I can use to simulate rows and columns for a periodic table for children?
Sunday, August 25, 2013 at 11:51am

physics
You are walking along Main street one afternoon. At 1 PM you are 50 meters east of the intersection of Main and Elm streets. You walk due east for 30 seconds, ending up 80 meters east of the intersection of Main and Elm. You then make a left turn and walk due north for 30 ...
Sunday, August 25, 2013 at 11:03am

Physics
A jogger travels a route that has two parts. The first is a displacement of 2.90 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 4.25 km. (a) What is the magnitude of , and what is the direction of + as...
Sunday, August 25, 2013 at 9:26am

physics
A ballistics pendulum is a device used to measure the speed of a fast moving projectile such as a bullet. A bullet of mass 5g is fired into a large block of wood of mass 1.5kg suspended from some light wires. The bullet is stopped by the block and the entire system swings ...
Sunday, August 25, 2013 at 2:51am

physics
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 79.0 m/s at ground level. The engines then fire, and the rocket accelerates upward at 3.90 m/s2 until it reaches an altitude of 980 m. At that point its engines fail, and the...
Sunday, August 25, 2013 at 2:06am

physics
I need to calculate the horizontal, vertical and resultant velocity of a ball thrown a distance of 8.23m in a time of 1.73sec (assuming the ball lands at the same height from which it is thrown). The angle of the throw is unknown. Please help!
Sunday, August 25, 2013 at 1:25am

physics
constant gamma(Y) for the oxygen as well as for hydrogen is 1.40. If the speed of the oxygen is 460 m/s, what will be the speed of the sound in hydrogen at same temperature and pressure
Sunday, August 25, 2013 at 12:52am

physics
(a) Two point charges totaling 8.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.839 m. What is the charge on each? smallest charge (µC) largest charge (µC) (b) What is the charge on each if the force is attractive? smallest charge...
Saturday, August 24, 2013 at 11:50pm

physics
Two point charges exert a 2.50 N force on each other. What will the force become if the distance between them is increased by a factor of 5?
Saturday, August 24, 2013 at 11:49pm

physics
What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -39.0 nC?
Saturday, August 24, 2013 at 11:49pm

physics
A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of the copper's electrons have been removed? (Each copper atom has 29 protons, and copper has an atomic mass of 63.5.)
Saturday, August 24, 2013 at 11:48pm

physics
A diver of mass m drops from a board 12 m above the water surface. Calculate his speed 6m above the water surface. What is the speed of the diver just he strikes the water?
Saturday, August 24, 2013 at 11:16pm

Physics
A monochromatic wavelength 600nm passed through a singlde slit which has a width of 0.8mm. A,calculate the distance between six and nineth bright frings.
Saturday, August 24, 2013 at 9:21pm

Physics
In a physics study group, a friend says in a profound tone that light is the only thing we can see. After a few laughs, your friend goes on to say that light is produced by the connection between electricity and magnetism. Is your friend correct? My responds is that my friend ...
Saturday, August 24, 2013 at 4:54pm

Physics ...
Hi Radioactive decay - A radioactive nuclide has a decay constant of - 10^-6 s-1 what is its half life ? I have come up with is IN (2) / 0.000001 s-1 = 693147.18055 which iam having troube working into real figures Can anyone help please .. thanks
Saturday, August 24, 2013 at 3:44pm

physics
A car accelerates from 44 m/s to 52 m/s in 3.4 seconds. What distance is covered?
Saturday, August 24, 2013 at 1:02pm

Physics
Two cars lost in a blinding snowstorm are traveling across a large field, each thinking they are on the road, as shown in the figure on the left. They collide. If the distance x is 141 meters and the red car is travelling at 19.5 mph, how fast to the nearest hundredth of a mph...
Saturday, August 24, 2013 at 12:18pm

physics
How many coulombs of positive charge are there in 8.70 kg of plutonium, given its atomic mass is 244 and that each plutonium atom has 94 protons?
Saturday, August 24, 2013 at 11:19am

Physics
Hi Radioactive decay - A radioactive nuclide has a decay constant of - 10^-6 s-1 what is its half life ? I have come up with is IN (2) / 0.000001 s-1 = 693147.18055 which iam having troube working into real figures Can anyone help please .. thanks
Saturday, August 24, 2013 at 8:27am

physics
A cylindrical capacitor is made of two thin-walled concentric cylinders. The inner cylinder has radius 4mm , and the outer one a radius 13mm . The common length of the cylinders is 153m . What is the potential energy stored in this capacitor when a potential difference 7V is ...
Friday, August 23, 2013 at 3:28am

physics
A PARTICLE OF MASS M IS SHOT WITH an initial velocity v making an angle b with the horizontal,the particle moves in the gravitational field of the earth. find the angular momentum of the particle about the origin when the particle is at the origin ,at the highest point of its ...
Thursday, August 22, 2013 at 7:23pm

Physics
Electrons on a radio broadcasting tower are forced to oscillate up and down an antenna 535,000 times each second. Show that the wavelength of the radio waves that are produced is 561 m.
Thursday, August 22, 2013 at 6:07pm

Physics
Astronomers find that light emitted by a particular element at one edge of the Sun has a slightly higher frequency than light from that element at the opposite edge. What do these measurements tell us about the Sun’s motion?
Thursday, August 22, 2013 at 2:51pm

Quantum Physics
If the first qubit is in the state √2/√3√|0>+1/√​3|1> and the second qubit is in the state 1/√3|0>+√2/√3|1>​, what is the state of the composite system?
Thursday, August 22, 2013 at 12:49pm

Physics
A truck has an average speed of 55 km/h. How far does it travel in 3.65 h?
Thursday, August 22, 2013 at 11:36am

physics
The Hyperloop is a hypothetical new fast transport system between cities, which works by launching pods that carry people through a very low air pressure tunnel. The Hyperloop reduces friction between the pods and the tunnel by supporting the pod on a cushion of air. This air ...
Thursday, August 22, 2013 at 9:37am

physics
10) Horizontal beam supported on both ends - square profil 100 × 100 × 5, length is 800 mm.It is bent by the force in the middle of the beam by 0.2 mm. To achieve approximately half of the value of deflection,you will use the beam:
Thursday, August 22, 2013 at 4:13am

physics
10) Horizontal beam supported on both ends - square profil 100 × 100 × 5, length is 800 mm.It is bent by the force in the middle of the beam by 0.2 mm. To achieve approximately half of the value of deflection,you will use the beam:
Thursday, August 22, 2013 at 2:09am

Physics/Formulas
Calculate the SI units of the constants A and B in each of the following equations. Assume that the distance x is in meters (m), the time t is in seconds (s), and the velocity v is in meters per second (m/s). a. x = A + B.t Meters = A + B * seconds b. x = ¼ A.t2 Meters...
Wednesday, August 21, 2013 at 9:34pm

physics
How many coulombs of positive charge are there in 8.70 kg of plutonium, given its atomic mass is 244 and that each plutonium atom has 94 protons?
Wednesday, August 21, 2013 at 9:22pm

physics
A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of the copper's electrons have been removed? (Each copper atom has 29 protons, and copper has an atomic mass of 63.5.)
Wednesday, August 21, 2013 at 9:12pm

physics
If 2.00 multiplied by 1020 electrons move through a pocket calculator during a full day's operation, how many coulombs of charge moved through it?
Wednesday, August 21, 2013 at 9:12pm

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