# physics please HELP !

128,227 results, page 82

### Physics-Attention ELENA

A circular plate with a slot in its surface is rotating with angular velocity ω and angular acceleration α with respect to a fixed coordinate system, OXYZ as shown. A ball B moves along the slot in the direction shown with velocity, v, and acceleration, a, both ...

### URGENT Spanish help please.

ok in the example it shows: ¿Comprendes espanol? Si, lo comprende ok for this question it's asking 1) do you and your siblings practice tennis my response: no, no los practicamos.. it said i was wrong how would I correct that 2) it asked does your mother teach biology? My ...

### @ Sarah - econ

I deleted your 43(!) questions. Since you didn't post your answers, I assume you wanted someone else to cheat and give you the answers. No way! If you try that again, you'll be banned from posting here! If you want to post three or four questions with your answers, we'll be ...

### Physics

When most people are asked what makes rockets lift off they say it's caused by the push of the exploding fuel against the ground. Explain why this is wrong. For every action, there is an equal and opposite reaction. That's from Newton, I think, but it may have been from one of...

### Physics

One more please, I cant figure out the equations. Boats generally have a hard time traveling faster than their hull speed, which is thespeed of a water wave that has the same wavelength as the boat length? (a) What is the hull speed for a 5 meter canoe in deep water? (b) What ...

### English

Write half page for each topic. What do you feel about? or something you wish to know or learned ? in college about? 1. Test preperation. 2. Faculty expectaton. I believe this is an assignment your teacher wants YOU to write. Anyone else's opinions about test prep or faculty ...

### Physics

In designing a velocity selector that uses uniform perpendicular electric and magnetic fields, you want to select positive ions of charge +5e that are traveling perpendicular to the fields at 8.75 km/s. The magnetic field availabe to you has a magnitude of 0.550 T. (a) What ...

### Physics

Two 75.0-kg hockey players skating at 5.25 m/s collide and stick together. If the angle between their initial directions was 140 degrees, what is their speed after the collision? (Let the motion of player 1 be in the positive x-direction and the motion of player 2 be at an ...

### PHYSICS ASAP PLEASE

A pellet (20g) is launched horizontally off a cliff (20m high) from a spring-loaded gun. The spring has constan k=1800 N/m and is compressed 0.10m before launch. How much kinetic energy does the pellet have just before it hits the ground? How fast will the pellet be going just...

### AP Physics B

I have one our part question left that I just don't understand! Please help me!! Part 1 An 11.6 kg block of metal is suspended from a scale and immersed in water as in the ﬁgure. The dimensions of the block are 12.9 cm × 9.7 cm × 9.7 cm. The 12.9 cm dimension is ...

### Physics

My physics optional extra work: This would be helpful so I can compare the solutions here as I do the work by myself. Question: A car enters a circular flat curve with a radius of curvature of 0.20 km with a maximum speed of 135 km/h. If the friction between the road and the ...

### PHYSICS - PLEASE HELP

Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A man weighing 650 N ...

### PHYSICS - PLEASE HELP

Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A man weighing 650 N ...

### physics-mechanics-collisions,momentum, impulse

You are at the controls of a particle accelerator, sending a beam of 2.40×107 protons (mass ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown element. All such ...

### Mucic

which skill helps a musician sing or play exercises or musical passages accurately without repeated practice Music - Connie, Thursday, September 18, 2014 at 7:25pm PLEASE HELP Music - Connie, Thursday, September 18, 2014 at 7:48pm PLEASE HELP Ms.Sue Music - Connie, Thursday, ...

### Theme please check

Could the theme be No women could change men The story is about a man marrying a women and the women wants the man changing his diet. The women bosses him around then the man finds another girl and takes off with her. He took off with her because the women bossed him around ...

### math

Find the Riemann sum associated with f(x)=4x^2+2, n=3 and the partition xsub0=-2 xsub1=1 xsub2=2 xsub3=4 of [-2,4] (a) when xsubk is the right end-point of [xsubk-1, xsubk] . (b) when when xsubk is the mid-point of [xsubk-1, xsubk] please help. i thought fora the anser was 216...

### psychology help please

Sara overhears her 21 old son,Joe telling his friends on the phone that he wants to have sex with two girls he just met at the mall.Joe's desire: A expresses the male tendeny to commit to arelationship B is an example of male nurturance C expresses the male tendency to more ...

### Physics

A physics student who is late for school is trying to catch her bus. The student is 10 m behind the bus as the bus starts from rest and begins to accelerate at 0.5 m/s2 away from her. If the student continues running at a steady 3 m/s, will she catch her bus?

### Physics to drwls question to answer given earlier

A 0.700-kg ball is on the end of a rope that is 0.90 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical as shown. What is the...

### calculus

Sorry to post this again, but I am still unable to understand it and need help. Please help.1) Using 3(x-3)(x^2-6x+23)^2 as the answer to differentiating f(x)=(x^2-6x+23)^3/2, which I have been able to do, I need to find the general solution of the differential equation dy/dx...

### Economics

PLEASE PLEASE HELP!!!! 1.WITH THE HELP OF DIAGRAMS,MAKE A DISTIOTION BETWEEN PERFECT COMPETITION AND MONOPOLOY IN THE SHORT AND LONG RUN 2.SUPPOSE A PROFIT MAXING FIRM IS PRODUCING AT AN OUTPUT LEVEL AT WHICH THE PRICE OF ITS PRODUCT IS LESS THAN THE AVERAGE TOTAL COST OF ...

### Physics

I've asked a similar qustion earlier and now I think I have drawn the correct free body diagram and go about solving the problem. The only thing is I do not know how to solve it. a block (mass m1) on a smooth horizontal surface, connected by a thin cord that passes over a ...

### physics

A block of mass m1 = 13.5 kg rests on a wedge of angle θ = 27∘ placed over a table.. An inextensible string is attached to Block M1, passes over a frictionless pulley at the top of the wedge, and is then attached to another block of mass M2 = 3 kg. The coefficient ...

### ENGLISH PLEASE HELP!!! URGENT!!!

The Lantern Festival is a unique Chinese cultural tradition that includes aspects such as fancy lanterns, watching the Lion Dance, and eating tangyuan. I wrote this thesis statement at the beginning of a paper I wrote about the Chinese Lantern Festival. but I have to restate ...

### Physics

A woman with a mass of 50kg is standing on the rim of a large disk that is rotating at an angular velocity of .50 rev/s about an axis through its center. The disk has a mass of 110kg and a radius of 4.0m. Calculate the magnitude of the total angular momentum of the woman-plus-...

### chemistry

what is the molecular formula of oxide of arsenic in its gaseous state (also I need to explain how this formula came about )?? There are two arsenic oxides. One is As2O3 and the other is As2O5. How did that come about? Please clarify. I assume you have some data; previous ...

### Algebra one, help me please?

Okay so, I have to write an equation in standard form, of a line that passes through the given point and has the given slope, ( M) or that passes through the given points. Heres what I think: 1)( 4,-1) M= 3 So, it's in y=3x+B and then, I would plug in -1 for y, and 4 for x. So...

### science

Please give me about 2 websites where i can find out interesting facts about Venus. 2 websites where i can find out if any robots or satellites landed on Venus.2 websites were I can find the average temperature of Venus. Lastly 2 websites where I can find out how long it takes...

### math

Express each of the following in terms of another angle between 0 degrees and 180 degrees a. sin 50 degrees b. sin 150 degrees c. cos 45 degrees d. cos 120 degrees please explain to me how to answer this question you don't have to answer it , but please give me a hint. its ...

### physics

A 3.90 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1N at an angle theta=32.5degrees above the horizontal, as shown. a.) What is the magnitude of the acceleration of the block when the force is applied? b.) What is the ...

### chem

consider the following balance chemical equation: 2NH3(g)+3CuO(s)=N2(g)+3Cu(s)+3H2O(g) if 18.1grams of ammonia reacts with 90.4 grams of copper(II) oxide, which is the limitting reagent?? what is the theorectical yield of nitrogen gasd? if 8.52 g of N2 are formed, what is the...

### chem

consider the following balance chemical equation: 2NH3(g)+3CuO(s)=N2(g)+3Cu(s)+3H2O(g) if 18.1grams of ammonia reacts with 90.4 grams of copper(II) oxide, which is the limitting reagent?? what is the theorectical yield of nitrogen gasd? if 8.52 g of N2 are formed, what is the...

### algebra

Note: Remember to show all of the steps that you use to solve the problem. You have $59.95 in your wallet and want to buy some new CDs. If the CDs are $11.99 each, what number of CDs, x, can you buy? Write and solve an inequality. (2 points) *Step 1: Determine if it is less ...

### science. please help a.s.a.p

i have to do a packet and i cant under stand it. it says ' sea level 10 degrees = 1 atmosphere and then i have to do tropopause ,stratapause and mesopause and the rest of it says . an atmosphere is a unit of air pressure . 1 atmosphere +average air pressure at sea leve under ...

### Algebra (Does any one understand special factors)?

I do not understand special factors, the teacher on Friday tried to explain in to me in class but she went so fast, and every time we complain that we don't understand it she gets mad. So could someone please help me with at least one problem so I can understand it better, and...

### Physics

Could someone help me with these questions. . . please 1. How does Rutherford’s model of the atom account for the back – scattering of alpha particles directed at the gold leaf 2. The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom...

### Help!!

What was the main concern for Anti-Federalists in passing the US Constitution as written after the Connecticut compromise? please someone tell me good site and please tell me how can I answer it, Check this site. http://en.wikipedia.org/wiki/Anti-Federalism

### Physics

An arrow is shot at an angle of above the horizontal. The arrow hits a tree at an angle 45 degrees horizontal distance D = 220 away, at the same height above the ground as it was shot. Use g = 9.8 for the magnitude of the acceleration due to gravity. Find t_a, the time that ...

### Math

Please check my work. 1) 64 divide -4 = -16 2) -144 divide (-9) = 16 3) Simplify -9 and a small 2 = -81 4) Simplify (-3) and a small 3 = -27 5) Add -4/11 + 5/11 = 1/11 6) subtract 5/11- [-3/11] = 8/11 7) multiply [-7/8] • [-2/4] = 7/16 8) divide -3.5 -5.6 = -0.63 9) classify...

### macroeconomics

Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to critique your work. =) Use the circular flow diagram to show how much each of ...

### Physics

Comic-strip hero Superman meets an asteroid in outer space, and hurls it at 750 m/s, as fast as a bullet. The asteroid is three thousand times more massive than Superman. In the strip, Superman is seen at rest after the throw. Taking physics into account, what would be his ...

### Physics

"Being an athlete takes more brains than brawn. It takes time and effort. It takes endurance and commitment. It takes an athlete who can stay in the air for 2.5 seconds while shooting a goal; an athlete who knows which laws of physics keep him there." Assess the information ...

### Math - I really need help, please.

A town has a population of 8400 i 1990. Fifteen years later, it's population grew to 12500. Determine the average annual growth rate of this town's population. I really don't understand this problem. I've been going at it for hours and all I've come to is that the equation ...

### physics

A hot air balloon is traveling vertically upward at a constant speed of 5.3 m/s. When it is 25 m above the ground, a package is released from the balloon. After it is released, for how long is the package in the air? The acceleration of gravity is 9.8 m/s^2. Answer in units of...

### physics

this is a physics qustion im stuck on: ingrid holds the womans record time for a marathon race of 2h 21min 6s for 42.195km. The mens record is held by Blake grison of 2h 6 min 50s. If they had been in the same race how much would blake win by.. find this in time as well as ...

### physics

Francesca, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from JFK Airport. She notices that the string makes an angle of 25° with respect to the vertical as the aircraft accelerates for takeoff, which takes...

### physics

The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The two boxes have ...

### Physics - Mechanics and Ocsillatory Motion

The force shown in the figure acts on a 1.7-kg object whose initial speed is 0.44 m/s and initial position is x = 0.27 m. the figure can be found at: [[webassign dot net forwardslash walker forwardslash 07-16 dot gif]] (a) Find the speed of the object when it is at the ...

### Physics >.<

A big truck has a mass of 5,000kg. It is moving down the road at a velocity of 15m/s. As it approaches a stop sign, the driver tries to stop, but the truck slides on ice and hits a car (mass = 500kg) that is stopped. After the collision, they move separately, the truck ...

### Algebra 2

would some one please check these for me 1. divide x^2-36y^2 over 5x^2+30y divide (x^2-6xy) A: x+6y over (5x)(x^2+6y) 2. Add. Express your answer in simplest form. 2x 0ver x^2+15x+54 + 4over x+6 A: 6 over x+9 3. solve: (9 over x-5) -1= 8 over x+5 A: -10 and 11 This one I am ...

### Ms.Susy Please Help With Time!!!!!!

My sub teacher today gave us a time problem on our homework. We haven't worked with time yet so I'm not quite sure I got it right: Ed started work at 8:45 AM. He stopped for lunch at 12:00 PM and went back to work at 12:45 PM. He quit for the day at 6:15 PM. How long did Ed ...

### Mass Communication

The act of communication is best understood as one that has social implications.Explain briefly Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think. Then someone here ...

### Physics

6. Within an x-ray tube, a metal disc (the anode) receives a huge amount of energy that is converted to internal energy (heat) within the anode. The surface temperature can easily reach 2000° C. Because the anode is within a vacuum and therefore there is no air around the ...

### Re: Physics

A square of edge length 19.0 cm is formed by four spheres of masses m1 = 6.00 g, m2 = 3.50 g, m3 = 1.00 g, and m4 = 6.00 g. In unit-vector notation, what is the net gravitational force from them on a central sphere with mass m5 = 2.20 g? _N i + _N j Physics - bobpursley, ...

### History

Please help. Literacy tests worked to dany the right to vote to African Americans primarily because a.. all white voters had higher literacy rates. b. the tests were only required in Southern States. c, African Americans were asked questions that were more difficult than those...

### PHYSICS: PLEASE HELP A.S.A.P HMK DUE AT MIDNIGHT T

During a storm, a car traveling on a level horizontal road comes upon a bridge that has washed out. The driver must get to the other side, so he decides to try leaping the river with his car. The side of the road the car is on is 21.9 m above the river, while the opposite side...

### Physics

As a traffic light turns green, a waiting car starts with a constant acceleration of 6.0 m/s^2.At the instant the car begins to accelerate, a truck with a constant velcoity of 21 m/s pass in the next lane. (a) How far will the car travel before it overtakes the truck? (b) How ...

### Physics :(( help please TT

You are a maker of hot air balloons and wish to construct a balloon that will lift you and a friend to places unknown. Your standard balloon design is a perfectly spherical, nylon fabric balloon with a small hole on the bottom for the burner that heats the air. Nylon starts to...

### Physics

Hi I have a question in Physics A block with mass 50kg is held on a slope. Ù friction coefficient = 0.35 between the plane and the block .. Planets angle v with the horizontal is 25 degrees. How far will the block slide down the plane in 5 seconds after it is released (in ...

### physics

Help, the last equation given to me on previous question was incorrect and I took a 0 % on my assignment !!! A mountain-climber friend with a mass of 82 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs. ...

### Physics- check answer please

Would the answer be b)? diamond into air? A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from diamond into water

### microeconomics, please help me solve .

The majority of the world’s diamonds comes from Country A and Country B. Suppose that the marginal cost of mining a diamond is $1,000 per diamond and that the demand schedule for diamonds is as follows: price quantity 6,000 5,500 5,000 6,500 4,000 7,000 3,000 8,000 2,000 9,...

### School's Newspaper

I need some article ideas to make the school's newspaper look really creative. Can you give me sites on ideas on writing any artitcle please also I need ideas to make the school's newspaper creative. Please. Thank You !!! :)

### Language Arts ~CHECK MY ANSWERS~

1.) Resilient people usually a. complain when they have bad luck. b. bring good luck to others. c. are able to deal with setbacks. • My Answer: (B- brings good luck to others.) 2.) When the speaker refers to pausing to “enjoy the view / of the trees and the flowers below...

### chemistry

Can someone please explain the behavior of HCl/NaOH mixture as to why it started bubbling/dissolving when combined with Mg and with NH4Cl and why when blue litmus paper was dipped in the HCl/NaOH mixture it turned red. Also can someone explain the correct behavior that is ...

### Physics

A particle travels counterclockwise around the origin at constant speed in a circular path that has a diameter of 2.50 m, going around twice per second. Point Q is on the path halfway between points P and R, which lie on the x axis and the y axis, respectively. State the ...

### PHYSICS

Please help me, I don't understand how to solve this: When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model ...

### Physics Urgent please help

A small sphere of mass m and charge +q with zero velocity falls under the influence of gravity (acceleration = g from height h onto an infinite uniformly charged plane with positive charge density sigma as shown below. What will the velocity of the sphere be when it hits the ...

### Physics Urgent please help

A small sphere of mass m and charge +q with zero velocity falls under the influence of gravity (acceleration = g from height h onto an infinite uniformly charged plane with positive charge density sigma as shown below. What will the velocity of the sphere be when it hits the ...

### Physics - Collisions

A big toy school bus rear-ends a small toy school bus initially at rest. The bigger bus is several times heavier than the smaller one. Which of the following statements are true if the collision is totally inelastic? 1. The big bus exerts the same amount of force on the small ...

### Spanish-Please check my answers

Please check if I answered these correctly-Thank you I forgot to put accent on "i" in Si and I use spanishtypeit not manually on the keyboard-Please excuse lack of accent ¿Tienes hambre? Si, tengo hambre. ¿Tienes sed? Si, tengo sed. ¿La manzana es una carne? No, la manzana ...

### maths

I am really facing difficulty in maths. I do my best to improve in maths but after entering in the examination hall during my exams, i just get confused. please help The proper name for the subject is mathematics or just "math" for short. Calling it "maths" calls attention to ...

### Help: Social Studies (Please check my answers)

1. In the Middle Ages, ceremonies such as weddings had to be performed by ___. c. a priest 2. Guilds did all of the following EXCEPT c. Set standards for the quality of their goods 3. What is one reason that the Church was so powerful during medieval times? b. It encouraged ...

### Physics

Tarzan plans to cross a gorge by swinging in an arc from a hanging vine (see Fig). If his arms are capable of exerting a force of 1200 N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? His mass is 84 kg and the vine is 4.8 m long. My ...

### english-PLEASE HELP

i need help writing a thesis statement for an essay. the topic is this: use an example from romeo and juliet, write and essay analyzing Romeo's decision-making abilities at this point in the play. also, include a tough decision you have had to make and explain how it could ...

### Urgent English help

The sentences below have transitive verbs so each verb has a direct object. Read each sentences and underline its direct object. (Underline the subject once, and double underline the action verb and circle the do.) *** Some may not have DO*** please correct me if I'm wrong! I ...

### math,correction

Can someone help me with these...plz Simplify 2radical (12) + 4 radical (27) if i simplify radical (12) i get 2radical (3) then if i simplify radical (27) i get 3radical (3). so now i don't know if i'm doing this correctly or how to set it up... 2 sqrt 12 + 4 sqrt 27 4 sqrt 3...

### Chemistry please help!

Please help. I have no idea how to do these 4 homework problems. 1- How many milliliters of 0.140 M HCl are needed to completely neutralize 42.0mL of 0.106 M Ba(OH)2 solution? 2-How many milliliters of 0.123 M H2SO4 are needed to neutralize 0.250 g of NaOH ? 3-If 55.2 mL of ...

### Chemistry!!!!!! Please help immediately!!!

Please show me step by step. Thank you. One commercial method used to peel potatoes is to soak them in a solution of NaOH for a short time, remove them from the NaOH, and spray off the peel. The concentration of NaOH is normally in the range of 3 to 6 M. The NaOH is analyzed ...

### science please help asap

1. A 2. A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction 3.a force of 318.123N accelerates a car at 3m/s^2 from rest for ...

### school

Hi. My name is Samantha. I'm in the 8th grade. Lots of people have been talking to me abou specialized high school. Can you please give me some information on specialized high school(I mean like what are the good and bad things obout specialized high school)? And can you ...

### to ms.sue- science project part 1

Please select one of the four solar-energy-based topics listed below to research. Based on your research you are to create a poster that details what you learned. Please make a bibliography of the resources that you used for your information, to go along with your poster. ...

### Math/Physics

The velocity v of a particle moving in the xy plane is given by v = (6.0t - 4.0t2) i + 4.0 j, with v in meters per second and t (> 0) is in seconds. What is the acceleration when t = 3.0 seconds? When is the acceleration zero? When is the velocity zero? When does the speed ...

### Physics

a pendulum bob with a mass of 0.13 kg is attached to a string with a length of 0.95 m. we choose the potential energy to be zero when the string makes an angle of 90 degrees with the vertical. (a) find the potential energy of this system when the string makes an angle of 45 ...

### Physics help

a pendulum bob with a mass of 0.13 kg is attached to a string with a length of 0.95 m. we choose the potential energy to be zero when the string makes an angle of 90 degrees with the vertical. (a) find the potential energy of this system when the string makes an angle of 45 ...

### Physics Homework

I have a few questions that I don't understand and would like to get checked, please? 5.If energy is conserved and momentum is conserved, would they both have to be conserved simultaneously in some interaction? My answer: No because each engergy and momemtum is being ...

### Pre- Algebra

HELP PLEASE I DON'T UNDERSTAND AND IT'S AN OVERDUE LESSON PLEASE HELP ASAP!!!!!!!!!!!!! A survey about the student government program at a school finds the following results: 218 students like the program 27 students think the program is unnecessary 245 students plan on ...

### science( Please Check My Answer)

Question: One of the largest cypress trees in Florida has a tree trunk diameter of about 3.5 m. What is the source of MOST of the carbon in the cypress tree's trunk? Answer choices: A. The tree created carbon during photosynthesis. B. The tree used carbon that it had stored in...

### 7th grade math please check ASAP please!

Tom buys a shirt for $22.00 plus 7% sales tax. His cousin buys a shirt for $18.00 plus 4% sales tax. a. How much do Tom and his cousin pay for the shirts? Show your work. b. Who spent more on tax? (3 points) Is my answer correct: B: Tom's cousin **I already know A, thanks for ...

### science VERY URGENT

Once again please give me about 2 websites where i can find out interesting facts about Venus. 2 websites where i can find out if any robots or satellites landed on Venus.2 websites were I can find the average temperature of Venus. Lastly 2 websites where I can find out how ...

### integrated math 1- please help!!!

Among a group of people, 10% are from NYC and 90% are not. All people from NYC are under 18 years old, and 70% of those not from NYC are also under 18 years old. One person is chosen at random, and he or she is under 18. What is the probability that the person chosen is from ...

### Please help

1. Napoleon Bonaparte claimed to have put into practice the ideals of the French Revolution and the Enlightenment. Do you think he did? Did his actions and the legacy of his reign represent those ideals? Explain in a short essay whether or not Bonaparte’s reign and legacy ...

### Physics ~Work Kinetic Energy~

1.)A ball (m 0.5 kg) starts from rest and has 300 J(joule) of work applied to it. a) what is the initial kinetic energy of the ball? b) what is the final kinetic of the ball? c) what is the final velocity of the ball? 2.)A boy is doing chin-up. If the boy does 450 N of work to...

### physics

1.when a person diet's is their goal to lose weight?explain. 2.a man enters an elevator holding 2 boxes one on top of the other the top box has a mass of 6.0kg,the bottom box has a mass of 8.0kg. the man sets the 2 boxes on a metric scale sitting on the floor when the elevator...

### Physics 152

I was able to come up with the answers through trial and error, and the answer for the charge +q makes sense, but I don't understand why the answer for the -q is correct. Please help. A positive point charge +q1, a second point charge q2 that may be positive or negative, and a...

### Physics**

1) Assume that you have two objects one with a mass of 10 kg and the other with a mass of 15 kg each with a charge of +3.0x10^-6 C and separated by a distance of 2 m. What is the electric force that these objects exert on one another? 2) Determine what happens to the electric ...

### Physics***

1) Assume that you have two objects one with a mass of 10 kg and the other with a mass of 15 kg each with a charge of +3.0x10^-6 C and separated by a distance of 2 m. What is the electric force that these objects exert on one another? 2) Determine what happens to the electric ...

### As Physics

Motion and Projectiles Homework-Due tommorow Extended Writing Task: Freefall Two identical steel balls are released from rest above cylinders containing oil as shown in the diagram below.The balls travel vertically until they reach the bottom of the cylinder. The graph below ...