# physics please HELP !

126,957 results, page 11

### Physics

A hypothetical spherical planet consists entirely of iron (p=7860kg/m^3). Calculate the period of a satellite that orbits just above its surface. I really can't solve this! No other information was provided. Please and thank you

### physics help!!!

A hypothetical spherical planet consists entirely of iron (p=7860kg/m^3). Calculate the period of a satellite that orbits just above its surface. I really can't solve this! No other information was provided. Please and thank you

### physics help!!

A hypothetical spherical planet consists entirely of iron (p=7860kg/m^3). Calculate the period of a satellite that orbits just above its surface. I really can't solve this! No other information was provided. Please and thank you

### physics

Dynamics question please help i am stuck...! A model helicopter of mass 5.0 kg rises with constant acceleration from rest to a height of 60 m in 10 seconds. Find the thrust exerted by the rotor blades during the ascent

### Physics

A bullet is ﬁred straight up from a gun with a muzzle velocity of 259 m/s. Neglecting air resistance, what will be its displacement after 8.9 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m. Please show work

### physics please help!!

find the temperature of the hot reservoir of a carnot engine that has QH=1575j that does work on a 200kg crate, caussing it to go from rest to a velocity of 2.35m/s along the horizontal frictionless surface. Tc=100K

### Physics

Use the Work-Energy Theorem to show that an object with initial velocity vo will travel a distance d across a rough horizontal surface before stopping, where d = vo2/(2mKg). Help ASAP please!!

### 11th grade English

Can someone please help me with the topics for a research paper. It needs to be based on some medical issues. This is the first time I am writing a research paper. please help me with a topic. Please!!!!

### Physics !!

3)A car increases its speed from 5 m/s to 35 m/s in a distance of 75 m a)what is the acceleration of the car? b)How long did it take the car to travel the 75 m? someone PLEASE help me willyah!

### Physics please clarify

A charge of +2q is fixed to one corner of a square, while a charge of -3q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of the square, so the potential is zero at each of the two empty corners? For Further ...

### physics

what is physics? i know that its subject but what is definition of physics? The study of matter, energy, space, and time, and the interactions thereof.

### Physics

Hello, I had a question for physics, and I tried it out, however, I got the wrong answer. The Question:If a rock takes 0.750s to hit the ground after being thrown down from a height of 4.80m, determine the rock's initial velocity. My Work : The formula- d=vi*t+1/2*a*t^2 The ...

### Physics

Hello, I had a question for physics, and I tried it out, however, I got the wrong answer. The Question:If a rock takes 0.750s to hit the ground after being thrown down from a height of 4.80m, determine the rock's initial velocity. My Work : The formula- d=vi*t+1/2*a*t^2 The ...

### RE: PHYSICS

A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to the flatcar. What is ...

### physics!

A battery has an emf of 8V and an internal resistance 2ohms. If it is connected to an external circuit that draws 6W of power, what is a possible current in the circuit? Please give me some ideas to do it! THANKS!

### physics

If the grating is not properly aligned, what are the consequences on the average angular displacement and wvelength reading? Please elaborate. How do grating constants affect the observed spectral lines?

### physics

please help me by showing steps thanks Assuming atmospheric pressure to be 1.01 * 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure at a depth of 15.0m below the surface of the ocean? thanks again:)

### physics

PLEASE HELP!! I HAVE A TEST TOMORROW!! if Q=30 uC, q=5.0 uC, and d=30cm, what is the magnitude of the electrostatic force on q in N? (Ke= 8.99 x 10^9 Nm^2/C^2) (uC= micro coulombs) (u= 10^-6) a. 15 b. 23 c. zero d. 7.5 e 38 i don't know where to start with this problem. i don'...

### physics

a 0.40kg ball is thrown vertically upward with a speed of 30m/s. The ball reaches a height of 40m. What is the energy dissipated due to air friction?... please help i don't know what to do:(

### PHYSICS

A steel ball is dropped from a hight of 50 m ,how far does the ball travel during the 3rd second of the fall. my anweres was 2.0, but that's not right, im confused where i went wrong please help thanks

### Physics

Please help me solve this! The spectrum of the sodium atom is detected in the light from a distant galaxy. If the 590.0 nm line is redshifted to 658.5 nm, at what speed is the galaxy receding from the Earth?

### Physics

When an object is moved from sea level to the top of a really high mountain, what, if anything changes about the weight of the object? Could someone please help me explain this problem. THANK YOU!!!

### physics

please help i have to turn this in by 10PM a bucket of mass 2.20 kg is whirled in a vertical circle of radius 1.55 m. At the lowest point of its motion the tension in the rope supporting the bucket is 28.0 N.

### physics

If the roller coaster track has a hill at the end that was equal in height to the original hill, would the marble make it all the way to the top? Please explain it to me! Thanks.

### Physics

Compute the torque about the origin of the gravitational force F = −mg acting on a particle of mass m located at r = x + y. (Use the following as necessary: m, g, x, and y). Torque = F (cross) r Please help

### Physics

3 charges sit on vertical equilateral triangle the side of each is 30.0 cm. if the triangle are A= +4.0 uC B=+5.0 uC and C=+6.0 uC (clockwise from top) what is the force on each charge? Can someone please explain me in detail i am really confuse :(((

### physics

An RV travels 45 km east and stays the night at a KOA. The next day it travels for 3 hours to the north, traveling 110 km. What is the displacement over the two days for the RV? Please help, thank you!

### Physics

A car starts from rest on a curve with a radius of 110m and accelerates at 1.2m/s^2. Through what angle will the car have traveled when the magnitude of its total acceleration is 2.1 m/s^2? Steps please.

### Physics Can you please help me due soon

A Carnot engine operates between 170°C and 23°C. How much ice can the engine melt from its exhaust after it has done 4.5 104 J of work? _____kg

### Physics

Why bother using a machine if it cannot multiply work input to achieve greater work output? Please help; need a original answer no Google search. Thank you in advance...

### Physics (Please Help)

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. Z = 4d1 (cos (0))^ 2

### Physics- check answer please

1. A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration? a) 0.05 mm b) 5.0 mm c) 15.mm d) 20.mm e) 180 mm my answer: I got 10 mm but it is not listed as an option

### physics

what is the average pressure and average thrust on walls of the tank of cubical dimension of each side 4 m filled with water upto the brim. given g = 10 m raised to -2 . Please help this is urgent

### Physics

If toy rocket rises vertically and then falls back to the ground, what changes occur in the rocket's velocity and acceleration. Please give a sentence explanation not a formula

### physics

During a baseball game, a batter hits a high pop-up. If the ball remains in the air for 6.65 s, how high does it rise? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m CAN ANYONE HELP PLEASE ??????!!!

### physics

A particle of charge +18.1C and mass 7.06 × 10-5 kg is released from rest in a region where there is a constant electric field of +414 N/C. What is the displacement of the particle after a time of 3.06 × 10-2 s? Please explain the steps, thank you.

### Question

Could someone please delete my previous question due to privacy issues? Posted by:Turner Date: Saturday, September 5,2015 at 9:00 pm Subject: AP Physics Thank you so much!

### Physics

what is the angular speed of the earth as it orbits the sun a) in radians/second? b) in degrees per day? I need help please. Use the equation and step by step to get the answer

### Physics

if the area of cross section of a wire in a circuit is doubled its resistivity? (a)becomes one fourth,(b) becomes half (c) remains the same (d) doubles. Exlpain please?

### physics

please i need help solving this problem, what is the resistance of a resistor if the potential difference across the resistor is 4.0 V when a current of 10.0 A flows through the resistor?

### Physics (please help)

A planet is in circular orbit about a remote star, far from any other object in the universe. Which of the following statements is true? a. None of the other statements are true. b. There is only one force acting on the planet. c. There are two forces acting on the planet and ...

### Physics

Hello can someone please help me with this physics question and show the work so I can understand? A box at the top of a rough incline possesses 981 joules more gravitational potential energy than it does at the bottom. As the box slides to the bottom of the incline, 245 ...

### Physics

Research on the physics of living systems.Give two examples to show how physics

### language art CHECK

Will somebody please check this for me and see if i used the words correctly please? Having spent many years as political opponents, the two senators have developed a(n)MUTUAL respect for each other. Please check if it is correct. thank you

### Of Mice and Men ASAP

Hi My summer reading list is due on monday and i'm running out of time to finish this book (it has 6 chapters) I don't have the book with me anymore sadly because it wasn't my book. I wanna know if you can tell me the conflict in each chapter please please please thank you :)

### Chemistry

Please please help me on this equation I'm stuck and your steps are confusing. Calculate the concentrations of each ion remaining in solution after precipitation is complete. (Enter a 0 if none of the ion remains.) Cl ‾ Ca2+ I have Ag+=0 and NO3^-3= 0.13 but I can't seem...

### Physics please check

Please tell me where i went wrong. During an all-night cram session, a student heats up a one-half liter (0.50 10-3 m3) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 19°C, and the beaker is filled to the brim. A short time later when the student returns, ...

### PHYSICS PLEASE HELP !!!!!

An object with a mass of 3.7 kg slides in the positive x direction across a horizontal surface with a coefficient of kinetic friction of 0.24. During its slide a force of 364 Newtons acts on it in the positive x direction while a force of 44 Newtons acts on it in the negative ...

### physics

When a tuning fork is held over the open end of a very thin tube, as in the figure below, the smallest value of L that produces resonance is found to be 33.0 cm. (a) What is the wavelength of the sound? [Hint: Assume that the displacement antinode is at the open end of the ...

### please

tell sme the answers to pig skin geogphy right now please right now please well i need them poisted

### maths

the sum of 3rd and 5th terms of an a.p is 38 and sum of 7th and 10th terms of an a.p is 83,find the a.p. please help all questions please help please.

### Maths-can someone explain something to me???

hey, can someone explain vectors to me? im soooooo lost, I don't understand them at ALL. please please please help me. :(

### Math, Please Help! I don't understand!

Please help me! I don't understand how to solve. Solve each equation for the given variable. 37. x/a - 1 = y/b for x 39. V = 1/3 * pi * r^2 * h for h What do these equations mean? I am super confused. Please help.

### spanish

is this translated right? In the morning I wake up at 8:30 a.m. The first thing I do is brush my teeth and comb my hair. Then I eat breakfast. By 9:00 a.m., I start my schooling (home). The first thing I work on is trigonometry. Then I do English, Trigonometry, American ...

### physics

the tub of a clothes washer goes into its spin-dry cycle starting from rest and reaches an angular speed of 6.50 rev/s in 7.85 seconds. at this point, the person doing the laundry opens the lid, and a safety switch turns off the washer. the tub then slows to a stop in 15.07 ...

### physics

determine the stopping distances for an auto0mobile with the initial speed of 90km/hand the human reaction time of 1.0s: (a) for an acceleration a= -40m/s^2; (b) for a = -8.0m/s^2 use one of newtons four equations to solve.... i don't get this at all...PLEASE HELP!!

### Physics

Understanding Newton's First and Second Laws, why do all objets near Earth accelerate at a constant rate "g"? I'm very confused, is it something about how inertia keeps the objects accelerating? Please help , thank you.

### Physics

Two uncharged metal spheres, spaced 20.0 cm apart, have a capacitance of 28.0 pF. How much work would it take to move 14.0 nC of charge from one sphere to the other? *Please report answer in Joules.

### Physics

An athlete starts at point A and runs at a constant speed of 5.40 around a round track 150m in diameter. Find the x component of this runner's average acceleration between points A and B. I don't even know how to start. Please help!

### Physics help please

A middle C (262 Hz) on a flute is heard when an air column that is 0.63 meters long resonates at zero Celsius. a.How fast will sound travel if the temperature increases by 10 degrees? b.By what factor will the frequency change?

### PHYSICS!!!

A net force of 30 N is applied to a 10 kg object, which starts at rest. What is the magnitude of its momentum after 3.0 seconds? Can someone please explain this as you go through the steps? I already know the equation is p=mv and I know that mass is 10kg and I just need v...

### physics

The forces in the figure below are acting on a 2.1 kg object. Find the values of ax and ay, the x and y components of the acceleration. i.imgur. com/nNz9m. png this is one of the last problems on my homework that i just do not understand.. can someone please explain it to me? ...

### 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.

### physics

The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the total force on a(n) 85 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 60 m/s in 7.2 s? Answer in units of kN So far I have (60-0)/7.2=8.34 but I got ...

### Physics

A baseball player leads off the game and hits a long home run. The ball leaves the bat at an angle of 30.0o from the horizontal with a velocity of 40.0 m/s. How far will it travel in the air? Working out please

### Physics

Please help A fully loaded aircraft has a mass of 3.3×10^5 kg.its total wing area is 500m2 . It is in level flight with a speed of 960km/h. Calculate the pressure difference between the lower and upper surface of the wings. Thank you!

### Math - Please help

I need help on the following please? A group of clowns performs in a ring with an area of about 2,123 square feet. What is the circumference of the ring? Choose the closest answer. 156 ft. 52 ft. 163 ft. 82 ft. Thank You. Please explain the answer

### Physics

I hope someone can help me, cause i am so confused. Pressure gradient-why can't submarines go to the bottem of the ocean? please help! Stop the multiple posts. I am a volunteer, and it is a waste of time to go through the same posts.

### physics

what are the horizontal components and vertical components of a cat's displacement when its climbing 5m directly up a tree. I don't know how to find the x and the hypotnuse of a right triangle when theres is no angle theta given. please help me.

### Physics

I failure to find an observation related to motion in two dimension projectile motion. Prove That/Show that maximum range =4Height or Rmax=4H please help me thanks Ahsan Khan

### physics

Two protons are moving directly toward one another. When they are very far apart, their initial speeds are 1.5e6 m/s. What is the distance of closest approach? PLEASE HELP! im very confused.

### physics

A train takes 2 hours and 30 minutes to travel between 2 cities that are 210 km apart. What was the average speed of the train? Could someone take me through the steps please on how to get the answer

### physics

By what factor will the rms speed of gas molecules increase if the temperature is increased from 0 degrees C to 100 degrees C? Cant figure out correct answer I've tried everything, please help!!!

### Physics

If someone could point me in the right direction-please!!! A car with an initial speed of 4.30m/s accerlerates uniformly at the rate of 3.00 m/s ^2. Find final speed after 5.00s. Thanks for any help you can provide.

### physics

a 2500kg truck applies a force of 4000 N to the road to accelerate forward. What is its rate of acceleration?...can someone please help? I got half way and then got really confused what do I do? Thanks

### PHYSICS (PLEASE READ)

I tried all the formulas i know but i cannot answer it I really need your help in this question.. A projectile was launched 64° above the horizontal, attaining a height of 10 m. What is the projectile's initial speed?

### Physics

Please Help. A 5 kg object is propelled from rest at time t=0 by a net force F that always acts in the same direction. The magnitude of F in newtons is given as a function of t in seconds by F= 0.5t. What is the speed of the object at t =4s?

### physics

How do you know that a sealed calorimeter is a closed system? because temperature is consurved because the masses of the sample and water are equal because thermal energy is not transferred to the environment because work is done on the test sample Please help me

### Physics(Please help)

A 0.0979-m x 0.215-m x 0.260-m block is suspended from a wire and is completely under water. What buoyant force acts on the block? Would I multiply all the numbers?

### physics URGENT! PLEASE

Figure the resultant velocity of a plane that is traveling at 300 km/hr @ 190 degrees when he encounters the wind below a) 30 km/hr tailwind b) 40 km/hr headwind c) 50 km/hr wind blowing south

### Physics

When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV Please someone help me out. Thank you.

### Physics (ASAP)

Please I need help. I don't know how to do this problem without the SPEED VALUE. A sport utility vehicle is travelling at a speed of v m/s. If its momentum has a magnitude of 32,800 kg·m/s, what is the SUV's mass? _______ kg Thank you.

### Physics

Three particles X, Y, and Z of masses 2 kg, 5 kg, and 4 kg respectively are arranged in order along a straight line. Y is 5.0 m from X and 7.0 m from Z. The distance of the centre of mass of the system of mass from X is? ANS: 6.6 m Help please? I don't even know how to start :(

### Physics

suppose you have a weight of 60 N. if the earth's mass decreased to one fourth its current mass, with no change in radius, then what would you weigh? Can you please explain how I can solve this problem?

### Physics

A 2.8 kg duck is swimming at 0.35 m/s and a 3.4 kg goose is swimming at 0.75 m/s. Which bird would make the biggest impact on you if it carelessly swam into you? Explain. I'm not sure where to start. Could I have some help please?

### Physics

A 2.8 kg duck is swimming at 0.35 m/s and a 3.4 kg goose is swimming at 0.75 m/s. Which bird would make the biggest impact on you if it carelessly swam into you? Explain. I'm not sure where to start. Could I have some help please?

### physics

The Earth is 150 million km from the sun. It completes one orbit in a period of approximately 365.25 days. Calculate the orbital speed of Earth in km/hour. please helpppp

### Physics

What minimum force is required to drag a crate (m = 40 kg) across a floor (co-efficient of kinetic friction = 0.6) if the force is applied at a 45 degree angle upward from the horizontal? Help ASAP please!!

### Physics

A 1 kg mass attached to a 1 m string is rolled around in a horizontal circular path with an angular velocity of 100 RPM what is the tension of the string? Please show how you got your answer.

### Physics

A container is filled to a depth of 20cm with water. on top of the water floats a 30.0 cm thick layer of oil with specific gravity of 0.700, what is the absolute pressure at the bottom? Please help!

### Physics

Can someone please tell me how to derive this: its supposed to be projectile motion with spring x = Sqrt (dx*g*1/2*m) +(mgh sin2theta) ---------------------------- (1/2)(k)(sin2theta) all i got is r =v^2sin2theta / g x is displacement of elastic plz help

### Physics

Can someone please tell me how to derive this: its supposed to be projectile motion with spring x = Sqrt (dx*g*1/2*m) +(mgh sin2theta) ---------------------------- (1/2)(k)(sin2theta) all i got is r =v^2sin2theta / g x is displacement of elastic plz help

### Science - Maps and Computers - Please Check

Please help me with the following: A single ocean color satellite can collect how many data points? A. 2,000 B. 2,000,000 C. 20,000 D. 2,000,000,000 I know the answer is not D, because I got it wrong. I think the answer is mostly A, but I also think it is possibly B. Is A ...

### phyiscs

Two persons watch the same object move john says that it accelerate straight downward, but Samantha claims that it falls Along curved path.describe the conditions under which each person would be reporting correctly what they see. Thanks and please please please answer this ...

### Physics

I'd like to know when it is appropriate to use each formula. Im new to studying physics and its seems that there are certain situations when one formula leads to the answer, yet a derivative of that formula that should lead to the answer is incorrect. For example: the question...

### Please Help with Physics ASAP!!

Okay, so I totally don't understand what to do with these three. Could you please show how to solve? I don't need to see the solution, just what steps I need to take for each (every smallest detail please). 1. A box weighing 150 N is at rest on a horizontal floor. The ...

### physics

Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step by step help please? asap. thanks, michelle . physics - bobpursley, Saturday, November 20, ...

### Physics. Please please help!

A charge Q = +4.5 uC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 uC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the x-axis under the ...

### Chem

The experiment is about titration of vinegar with NaOH. Before I start titration, I need to calculate how much of vinegar I will want to be using. I think I might use 50ml of distilled water to mix vinegar and I am gonna drop 3drops of phenolphthalein as indicator. Please help...