# physics please HELP !

127,551 results, page 25

### Algebra (please help!)

Find an equivalent inequality with absolute value #1: -5 < y < 5 #2: x < -4 or 4 < x I'm not sure at all how to solve this problem. Please walk me through the process. Thanks!

### english

when the legends die by hal borland when tom reflects that he succeeded in killing the past, what does he mean? why did he need to kill it, and how did he? please please help me .

### science

hi can someone please help me. I need a scientific article with an author that is about ozone depletion. I have been looking forever. Please help thank you

### Algebra.. please help

Please help. I have been trying to figure this problem out for an hour now. Solve the following system of equations. X + 8y = 5 (1) x=8-8y (2)

### Algebra 2 URGENT PLEASE HELP

find an equation of the linear function f using the given information. please show all steps and work f(-1)=1, f(1)= -2

### Chemistry

I..don't understand any of this: 43. How many moles are in 25.0 grams of potassium? Show your work and round your answer to the appropriate number of significant figures. Please, please help with this! Thanks -MC

### calculus

can someone please help me with these 3 questions: 1) Evaluate the limit. lim_(x->infinity) (ln(ln(4 x)))/(4 x) 2)Find y ' and y ". y= ln(5 x)/x^7 3)y =(arctan)(x - sqrt(1+x^2)) for this question i got y = -1/(2(1+x^2))which was wrong. Please and thank you!

### Biology/help please

I am a being from another planet, please explain to me which is alive: a clock or a fish? Compare the two, similarities and differences.Can you help me answer this question ? thank you.

### Calc

The total area enclosed by the graphs of y=10x^2-x^3+x y=x^2+19x Please Please help me solve this. I have done it amny times, but getting it wrong

### 7th lang arts

Hi! Um.. What is the synonym of length? Please choose from this list: acute duration fidelity headstrong pacify refute Please help!!! Thank you!!

### Science

Please Help Thank you. If you had to argue the benefits of wind energy, what would they be? and What are the risks? can you please answer these question in 120 words or more Thank you.

### English please help

please help if my ansers are correct. 1. substantive -first 2. copyeditng-second 3.proofreading-third 4.revising-fourth thank you very much

### Algebra(please help)

Will someone please help me withthis question I couldn't solve it. What is the length of the segment whose endpoints are A(2, 3) and B(10, 7)? a)2 Sqrroot29 b)2 Sqrroot41 c)4 Sqrroot2 d)2 Sqrroot5

### mathURGENT!!!!!!

what is the greatest value of m such that 25!/5^m is an integer? hint: the exclamation point means "factorial". 3!=3*2*1=6 4!=4*3*2*1=24 etc. please answer and explain how you got it!!!!please???

### math

No idea. Please help. Is 20 times 5/6 g reater than or less than 20? How do you do it? Second question What is 4/5 of 2/3?It shows a square and says find answer on the model. Any help, please

### statistics-PLEASE HELP quick

I have less than 24 hours to find the binomial probability of P(20<x<23)= and P(x>23)= if n=30 p=.23 u=6.9 q=.77 and the standard deviation is 2.3 can someone please show me how to get the outcome they want?

### Science ~ Structures and Properties of Matter

How do the principles of convection, conduction, and radiation explain how the water in the saucepan gets hot? Help ME PLEASE! PLEASE

### Help please, :)

I was wondering who won the French and Indian War, I decided to ask my mom, and my little sister says.. George Washington!! well, I know that isn't the answer, haha, help please?

### physics

Damped mass spring system oscillates at 205 Hz. The time constant of the system is 6.6s. At t=0 the amplitude of oscillation is 4.7 cm and the energy of the oscillating system is 26J. What is the amplitude of oscillation at t=9.9s? Answer in units of cm please help

### Physics

A man jogs at a speed of 1.7 m/s. His dog waits 2.5 s and then takes oﬀ running at a speed of 4.1 m/s to catch the man. How far will they have each traveled when the dog catches up with the man? help me set up the equations please!

### Physics help

I'm trying to calculate the tension in a rope. The two ropes are holding up a picture frame that is 100N, each rope is at a 45 degree angle. I'm trying to find the value of the tension of the 1st rope. Please help

### Physics please help me (:

Calculate the change in internal energy of a system if 25000 J of heat is added to the system while the system does 40000 J of work on its surroundings. Does this represent an increase or decrease of internal energy?

### HELP PLEASE! (Math)

Krystal grilled 21 burgers at a block party. She grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 punds and each hamburger weighed 1/3 pound. How many of each did Krystal grill? ~Please help me and provide an explanation for ...

### English

Please check for any errors. If there are some errors please correct them for me. When you were in my office last Tuesday, you stated that you wanted to alter your will to include two additional heirs. I have now prepared a will in compliance with your instructions. Please ...

### ENGLISH

Please check for any errors. If there are some errors please correct them for me. When you were in my office last Tuesday, you stated that you wanted to alter your will to include two additional heirs. I have now prepared a will in compliance with your instructions. Please ...

### ENGLISH

Please check for any errors. If there are some errors please correct them for me. When you were in my office last Tuesday, you stated that you wanted to alter your will to include two additional heirs. I have now prepared a will in compliance with your instructions. Please ...

### AP Physics Word Problems ASAP!

Could you please help me out with the following problems please? If a rocket initially at rest accelerates at a rate of 50 m/s^2 for one minute, its speed will be ? ( I know there are 60 seconds in 1 minute, so would I just use the formula, d=vt, and I would get 3000 m/s) It ...

### physics

I have 2 fill in the blanks that I need help with. 1) When electrons are forced away from a/an ___ plate, work is done. could the answer be positive? 2) Any pointed or angular surface of an object must have a/an ___ concentration of charge to establish equilibrium. I do not ...

### Physics

A block of mass 77.0kg is placed at the top of a frictionless plane that is inclined 46 degrees to the horizontal. The height of the plane is 23.0 meters. Find the speed of the block at the bottom of the plane. Please show all your steps, don't just suggest a formula. Thank ...

### Physics

we have a test coming up and I cannot figure out the practice question. Can somebody please help? Aaron throws a 7.5 kg bowling ball by applying a 45 N force for a time of 0.90seconds. What is the impulse Aaron applies to the ball? What is the ball's speed at the end of this ...

### Physics

A 54.0-g Super Ball traveling at 29.0 m/s bounces off a brick wall and rebounds at 18.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.00 ms, what is the magnitude of the average acceleration of the ball during this time interval in ...

### physics multiple choice MCQ 2- i need help please @all respective sir & bro

which of the following laws is applicable for the behavior of a perfect gas? a. Boyle's law b. Charles' low c. Gay-Lussac law d. all of the above e. joule's law

### EDU310

please help me with this two questions I am in the hospital because i have a car accident please help 1- There are many groups that influence education in schools today. Who are these stakeholders and how do they impact the way children are educated in America. 2- How has the ...

### Physics

A stone is aimed at a cliff of height h with an initial speed of 62 m/s directed 45° above the horizontal, as shown in the Figure below. The stone strikes at A, 6.56 s after launching. What is the height of the cliff? Can someone please tell me which equation(s) I need to use...

### physics

Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can anyone please give me ...

### PHYSICS

Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can anyone please give me ...

### physics

please help me with this question " king kong carries a Fay Wrap up the 321-m-tall empire state building. at the top of the shyscraper, Fay Wrap's shoe falls from her foot. how fast will the shoe be movinig when it hits the ground?"

### Physics

An odometer in a car has a reading of 50 km at the beginning of a trip and a reading of 125 km half an hour later. What is the average speed of the car? Textbook ans: 150km/h Please can someone help me solve this problem? I don't know how to solve it. Can you show me steps (...

### college physics

The intensity of an earthquake wave passing through the Earth is measured to be 2.5×10^6 J/m^2 at a distance of 43 km from the source. What was its intensity when it passed a point only 2.0 km from the source? AND At what rate did energy pass through an area of 4.0 m^2 at 2.0...

### Physics please help!!

A car starts from rest and travels for 5 seconds with a uniform acceleration of 2m/sec^2. The driver then applies the breaks causing a deceleration of 1.5m/sec^2. If the breaks are applied for 4 second, how fast is the car going after the breaking period?

### physics please help!!

A 0.267kg ball is thrown straight up from 2.20m above the ground. Its initial vertical speed is 9.20m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.

### physics please help!!

A 0.267kg ball is thrown straight up from 2.20m above the ground. Its initial vertical speed is 9.20m/s. A short time later, it hits the ground. Calculate the total work done by the force of gravity during that time.

### physics please helpp

A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t = 0.175 s. ? b)... the ...

### Physics

A patio swing is suspended by two springs, each of which has a force constant of 415 N/m, equivalent to a single spring force constant of 830 N/m. Find the mass of a person sitting on the swing oscillating up and down at a frequency of 0.590 Hz. Please HELP!

### Physics (vectors)

I am stuck with this question.Please help. I have a triangle that is not a right triangle with sides A, B, and C.(no values).The arrow's heads of A and B are joined and the arrow's head of C is in the tail of B. If the resultant is A,what is the vector equation, and what is ...

### physics

19 cars in a circle at a boom box competition produce a 130 dB sound level at the center of the circle. What is the average sound level(dB) produced there by each, assuming interference effects can be neglected? Please someone help me to solve this problem. Thanks a lot.

### physics

Radius of Curvature A bicyclist traveling at 8 m/s rides around an unbanked curve. The coefficient of friction (is this static or kinetic friction?) between the tires and the road is 0.36. What is the radius of the shortest turn that the bicyclist can safely make? Please, ...

### Physics

An electron traveling at 7.00 x 10^6 m/s enters and passes through a parallel plate capacitor. determine the electric field generated by the capacitor. note that the electron just clears the corner of the positive plate. PLEASE SHOW ALL WORK!!!

### Physics

Do you think that power generated by the electric company means the same thing as the power as explained in this lesson (meaning work over time)? Why or why not? My teacher gave a hint to "Think about each in terms of the amount of work done" Please help! Thank you!!

### ART

i need to describe my public identity by drawing. can you please give me some ideas? please? i want to know your public identity so that i understand mine. i don't know anything ... but is it ok if i say, i catch the bus to school everyday and i like shopping... i don't know ...

### COURSE HELP PLEASE ms sue qq

What course should i really take if i want to be a pediatrician ? COURSE HELP PLEASE - Ms. Sue, Friday, January 31, 2014 at 11:47am You should take all of the hardest courses offered, especially in math and sciences. ================ HI what are those ? really all ? not just ...

### Math Please it is Urgent!!!

11. Write a sequence of transformations that maps triangle ABC onto triangle A''B''C''. Here is ABC: A(1,8), B(3,12), C(4,4) Here is A''B''C'': A''(3,-3), B''(5,-6) C''(6,2) Please help I have tried everything and this is over due. There is no choicies bc i have to write them ...

### math(help)

please answer this one question because im clueless lol!!! A number is written with the following factorization:2exponet is 3 multiplied 4 multplied 5. is this factorization a prime factorization?please explain to me or why not?if its not correct,please give me the correct ...

### physics

A hot iron horseshoe (mass = 0.43 kg), just forged (Fig. 14-16), is dropped into 1.60 L of water in a 0.26 kg iron pot initially at 20°C. If the final equilibrium temperature is 26°C, estimate the initial temperature of the hot horseshoe. Could someone please help me out ...

### Physics

Research on the physics of living systems. Give two examples to show how physics helps to understand the concepts of evolution, biological systems of living organisms.

### Physics

Research on the physics of living systems.Give two examples to show how physics helps to understand the concepts of evolution, biological systems of living organisms.

### Physics please help!!

A 73.5 kg person sits on a 3.20 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.74 cm in diameter. Calculate the pressure exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.

### Physics

Hi, I solved this problem, but I want to make sure it is correct: 2 equal charges are separated by 3.7x10^-10m. The force between the charges has magnitude of 2.37x10^-3N.What is the magnitude of q on the charges? F= ( k x q x q)/ (r^2) F=2.37 c 10^3 N k= 9 x 10^9 r= 3.7 x 10...

### Physics practical

1)explaind the meaning of young modulus 2)what do you understand by the modulus of elasticity of a cantilever{practically} 3)what are the precautions observed when performing a cantilever practical 4)what is the conclusion from the practical please answers are needed immediately

### Physics

A charge q1 = 5 ìC is at the origin. A second charge q2 = -3 ìC is on the x-axis, 0.8 m from the origin. The electric field at a point on the y-axis, 0.5 m from the origin is: I don't understand the question please help . Thanks for reading

### Physics

1.33 kg of ice at 0°C is added to an 8.25 kg tub of water at a warmer temp. If their final temp is 15.7°C, What was the inital temp of the water in the tub? Please help, I cannot get the right answer.

### physics

When you go out to your car one cold winter morning you discover a 0.54 cm thick layer of ice on the windshield, which has an area of 1.6 m2. If the temperature of the ice is -4.1°C, and its density is 917 kg/m3, find the heat required to melt all the ice. Express your answer...

### Physics

when you watch a cricket player catch the cricket ball, you will notice that he allows his hands to trace the path of the ball as it reaches him what is the physics principles behind this? and baseball catching is different, as the catcher moves towards the ball often with his...

### 7th grade math please help Ms. Sue ASAP

12. Write a sequence of transformations that maps triangle ABC onto triangle A''B''C''. It is a graph, so here are the coordinates: A is 1,8 B is 3,12 C is 4,4 A'' is 3, -3 B'' is 5, -6 C'' is 6, 2 Please help! I have no idea how to write a "sequence of transformations "!! I ...

### Science PLEASE PLEASE HELP

Which of these statements about saltwater is correct? Saltwater freezes at a lower temperature Saltwater freezes at a higher temperature Saltwater does not freeze at any temperature Saltwaters freezing point depends on the temperature of the ocean floor***** PLEASE HELP ME

### Physics...Help please

The problem is from fundamentals of physics 9th edition by halliday. Here is a free download of the book since I couldn't post the graph (I had to write out link since site doesn't allow links to be posted): tripplew period sendspace period com/file/shrz0x I am having trouble ...

### physics

If the mass is 4.3 kg, the initial speed is 4.0 m/s, and the initial height is 8.4 m, find the speed of the ball when it is at a height of 8.0 m. Please and Thank You for the help.

### Physics

A physics student stands on the edge of a cliff 2x meters. He throws his physics homework straight up in the air. Derive an expression to calculate the time taken by the homework to come back to the student.

### physics

Two person watch the same object move.Marty says it accelerates straight up downward,but joanne claims it falls along a curved path.describe the conditions under which each person would be reporting correctly what they see. sorry for my mistakes can you please answer it ms.sue

### Physics

A ammeter is to be constructed using a galvanometer that has a 2.00 mA full-scale deflection and internal resistance of 50.0 ohms. It must be good enough to detect 40 mA, which is the max current. How would one do this? How would you make a voltmeter able to read the largest ...

### Physics (please help!!!!)

Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This alignment corresponds to a ...

### Math College Algebra (urgent before 2hours)

Find the zeros of the following USE ALL THE THREE METHODS FOR EACH NUMBER ( Factoring, Completing the Squares and Quadratic Formula) 1.f(x) =3x+5 2.g(y)=y^2-3y+2 3.s(xl= -6x^2-13x+5 Please help me I need this before 2 hours to come. Please help me hpw to do this . Please help ...

### Chemistry

A silicon chip is used in an integrated circuit of a microcomputer has a mass of 5.68 mg. How many Si Atoms are present in this chip. Okay here is how I worked it. Can someone please tell me if its right? 1 mole of Si = 28.086g = 6.022 x 10^23 5.68mg of Si 1g/1000mg = .00568g ...

### English

1. Let me call roll to make sure you're all here. 2. Let's decide the turns first. Who would like to go first? 3. Could you please fetch it from the staff room? 4. Could you please fetch it from the teachers' room? 5. Could you please fetch it from the teacher's room...

### Physics(Please, please respond)

Vector A has a magnitude of 3.0 m and direction 1o3 degrees relative to the positive x-axis. Vector B has magnitude 5.0m and direction 215 relative to the positive x-axis. For the resultant I did Rx= 3 cos 103 + 5 cos 215 Ry=3 sin 103 + 5 sin 215 Then sqrt Rx^2 + Ry^2 and got ...

### Physics

a car is accelerating at a uniform rate of 0.85 m/s^2. what is the magnitude of the car's displacement as it accelerates uniformly from a speed of 83 km/h to one of 94 km/h? i tried a formula that solves for displacement and uses initial and final velocity and acceleration..i ...

### physics

can someone take me through this vector combination question please an airplane is observed to be flying at a speed of 600km/h. The planes nose points west. The winds velcoity is 40km/h 45degrees west of south. Find the air planes velocity relative to the ground.

### Physics

A record for a marathon is 2.00h, 9.00min, 21.0 sec. If the average speed of a runner achieving this record is 5.436 m/s, what is the marathon distance? Answers: 15,878 km 7,761 km 42.2 km 26.2 km We're omnly two days into the new school year and I don't have all the formulas ...

### Physics-Please check

Do charged particles always experience equal but opposite electrical forces? My answer is The electric forces are directly porportional to the quantity of the charge on the objects. Is that correct-we just started learning this and I'm trying to answer this question and sound ...

### Physics

1. If a 30kg object experiences a normal force of 210N when traveling down a ramp, what is the angle of incline? Also, calculate the force of friction and the coefficient of friction. Answers: μ(mu)=0.98 Θ=44.5 degrees But please show work and all equations/variables...

### college physics

I don't know where to begin with this question. Could someone help me please? A rod of mass 4.1 kg and length 1.6 m hangs from a hinge as shown in the figure below. The end of the rod is then given a "kick" so that it is moving at a speed of 5 m/s. How high will the rod swing...

### physics

A 45 g superball traveling at 28.0 m/s bounces off a brick wall and rebounds at 24.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.60 ms, what is the magnitude of the average acceleration of the ball during this time interval? (Note...

### PHYSICS need help now!!!!!!!!!Please

In a railroad switchyard, a 48ton freight car is sent at 6.8mi/hr toward a 28ton car that is moving in the same direction at 3.8mi/hr .What is the speed of the pair after they couple together?What fraction of the initial kinetic energy was lost in the collision?

### Physics

To combat wasteful habits, we often speak of “conserving energy,” by which we mean turning off lights, heating or cooling systems, and hot water when not being used. In this chapter, we also speak of “energy conservation.” Distinguish between these two usages. Please ...

### Physics help

A blacksmith at a historical reenactment is making an iron hinge. after placing the iron (0.750 kg) in the fire and shaping it with his hammer it is still at 200 C. he puts the iron piece in an 8 L bucket of water at 25 C. what is the final temp. of the iron (assume it is in ...

### physics

A 25 kg cannon ball is fired from a cannon with muzzle speed of 1520 m/s at an angle of 35.5 ◦ with the horizontal. The acceleration of gravity is 9.8 m/s 2 . Use conservation of mechanical energy to find the maximum height reached by first ball. Answer in units of m. I ...

### Physics

"a vector r has a magnitude of 18 units and makes a 30 degree angle with respect to the x axis. find the vector components of r using a protractor and some graph paper to verify your answer by drawing r and measuring the length of the lines representing its components." please...

### physics

A particle moving in simple harmonic motion passes through the equilibrium point (x=0) 9 times per second. At t=0t=0 its velocity at x=−0.01 m is negative. It travels 0.4 m in a complete cycle. The particle's position as a function of time is described by the following ...

### Physics

A 11 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.4 m/s2, find the force exerted by the rope on the bucket of water. I thought I was supposed to use F = M x A for this one, but I keep getting the answer wrong. Help please?

### Physics Please Help

A horizontal spring with k = 70 N/m has one end attached to a wall and the other end free. An 95 g wad of putty is thrown horizontally at 3.4 m/s directly toward the free end. Find the maximum spring compression.

### Physics

25) A 75-g ice cube at 0 C is placed in 825g of water at 25 C. a) What is the final temperature of the mixture? b) If the final temperature is 0 C, then how much ice remains? c) change the ice's mass to 300g, and repeat the problem I don't know how to work this at all!!! ...

### Physics

Can someone please help me? The brakes of a truck cause it to slow down by applying a retarding force of 2.60 103 N to the truck over a distance of 930 m. What is the magnitude of the work done by this force on the truck? Is the work positive or negative? Explain Why?

### Physics

PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h

### Physics

PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h

### maths/physics

PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?

### physics-please help

A child of height 1.2 metres stands 3 metres from the foot of a lamp post of height 2.8 metres, at the top of which there is a small source which can be considered as a point. What is the length of the shadow cast by the child upon the ground?

### maths/physics

PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?

### Physics, Please Help

A 2130-kg space station orbits Earth at an altitude of 455 km. Find the magnitude of the force with which the space station attracts Earth. The mass and mean radius of Earth are 5.98 × 1024 kg and 6370 km, respectively.

### physics

A hydraulic jack has an input piston with a diameter of 1.00 cm, and an output piston with a diameter of 6.00 cm. What weight (in N) can be lifted when a force of 45.8 N is applied to the input piston? Answer is 1650 N but I need someone walk me through the steps please.