# physics please HELP !

127,101 results, page 72

### English

Task2.Identify and choose the one word or phrase that should be corrected. 1.If(A) boss comes from(B) Moscow(C) everybody will get their(D) share(E). 2.Tom has never(A) spent his holiday(B) on the beach because(C) he(D) doesn't know to swim(E). I don't understand this question...

### Social Studies (please check Ms. Sue)

Please check this. Thanks! 1. How did World War 1 benefit South Carolina's economy the most? a. The government improved transportation systems.*** b. The government opened military bases for training. c. The people of South Carolina bought Liberty Bonds. d. The people planted ...

### physics

In a room that is 2.13 m high, a spring (unstrained length = 0.30 m) hangs from the ceiling. A board whose length is 1.58 m is attached to the free end of the spring. The board hangs straight down, so that its 1.58-m length is perpendicular to the floor. The weight of the ...

### Physics

A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the average induced emf in the coil during this ...

### Pre-Algebra

P.S - I really need help please help me with this, please i try and still i can not do this please!!!!!! :( :( :( :( :( The table below shows the percentage of households that own a microwave in different countries. Construct a stem-and-leaf plot of the data. Use the ‘|’ ...

### organic chemistry

urgent, please help me...this is about the separation and purification scheme... there is 4 group of mixture: a)benzoic acid, benzoin and 1,4-dibromobenzene b)fluorene, o-toluic acid and 1,4-dibromobenzene c)phenanthrene, methyl 4-aminobenzoate and 1,4-dibromobenzene d)4-...

### Chemistry

A buffer contains 5.00 M acetic acid and 5.00 M acetate anion. Gaseous HCl (0.010 mole) is added to 1.00 L of this buffer solution (the total volume does not change). For this buffer solution, the initial pH is_______and the final pH after the addition of the HCl gas is_______...

### Math 8R - HW Qs. Check

Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c (7-6 = 1) i+h = a ...

### physics

A 110g hockey puck sent sliding over ice is stopped by a frictional force on it from the ice a) if its intial speed is 6.0m/s, what is the magnitude of the frictional force? b) what is the coefficient of friction between the puck and the ice? I am unsure how to solve the first...

### college algebra, Please help!!

use the remainder theorem to find the remainder when f(x) is divided by x-2. then use the factor theorem to divide x-2 is a factor of f(x). f(x)=4x^4-7x^3-5x+2 the remainder is ? is x-2 a remainder of f(x)=4x^4-7x^3-5x+2 please show work

### English

I think the answer is "Jackie, please see whether the postman has oh there he is now." But my friend thinks its this way "Jackie, please see whether the postman has, oh! There he is now."

### chemistry

For these problem, I know how to solve it, but I have some issues with the formula. I know that, I need to write down the formula first, and then I need to balance the equation, then I can solve it. So, can anyone please check my formula? You don't have to solve the problem ...

### Physics

In her physics lab, Stephanie rolls a 30 g marble down a ramp and off a table with a horizontal velocity of 2 m/s. The marble falls in a cup placed 0.4 m from the table’s edge. a. How long is the ball in the air? 0.2 s b. How high is the table? m

### Physics

In her physics lab, Jessica rolls a 20-g marble down a ramp and off the table with a horizontal velocity of 1.10 m/s. The marble falls in a cup placed 0.44 m from the table's edge. Find the table's height. Use g = 10. m/s2. Enter m as unit.

### algebra

Can somebody please help me with these problems? Factor the expression on the left side of each equation. Then solve. 1)x^4-5x^2+4=0 2)x^4-8x^2+16=0 Please and thank you! 1) let y = x^2, then y^2-5y+4=0 (y-4)(y-1)=0 y = 4 or y = 1 x^2 = 4 or x^2 = 1 x = -2, +2, -1, +1 same ...

### history

can someone pleeease give me some helpful information, or some good points, with which i could answer this question. it will be veryyyy much appreciated. thank you compare the colonial empires of Spain, France and England in terms of their settlements, economic structure and ...

### English

Could you please check these sentences, please? Thank you I've got short, wavy, dyed blond hair. I've got a round face, heavy eyebrows, oval eyes, a large mouth and a small nose. I'm friendly and sensitive. I'm quite serious and clever. I'ma bit shy but I'm generous. I'm pale-...

### physics

a)If you roll a putty ball around inside of a bowl, it soon comes to a rest in the center. A steel ball will orbit quite a few times before coming to rest in the center of the bowl. What would be the ideal motion of the ball in the bowl? (no friction) b) A car can accelerate ...

### Physics

A girl is sledding down a slope that is inclined at 30º with respect to the horizontal. The wind is aiding the motion by providing a steady force of 131 N that is parallel to the motion of the sled. The combined mass of the girl and the sled is 59.9 kg, and the coefficient of...

### the play hamlet

in his plays william shakespeare wrote a great many phares that have stood the test of time. see whether you can rearrange the letters below to discover shakespeares phares still used today. a)d t o h i n i a van_s_e_ i_t_ _h_n _ir hint: its what hamlet's fathers ghost did ...

### Chemistry

I am doing a lab on enthaply of vaporization of water, I got everything else on the post lab but these two questions, please help. The deltaHvap data from the handbook reference vary with temp. 1) if your data were perfect, but deltaHvap is not constant, how would this show up...

### Science fair project

Please help me, i think i have nothing left to do except cry!!! My science fair class presentation is tomorrow but i am not even done, i just started!!!! My parents are upset with me, and i think i will get a F in my report card for science this term, my worst! PLEASE TELL ME ...

### biology - Genetic probability

Black coat colour in Labrador Retrievers is produced by the dominant B allele. Brown labs are homozygous recessive (bb). Duke, a black male, whose mother was brown, is mated with Shadow, a black female, who in a previous mating with another father produced brown offspring. ...

### Physics HELP ASAP PLEASE

A hawk is flying horizontally at 10 m/s in a straight line 200m above the ground. A mouse it was carrying is released from its grasp. The hawk continues on its path at the same speed for two seconds before attempting to retrieve its prey. To accomplis the retrieval, it dives ...

### Repost repost physics

Posted by Meredith Mcneeds Help! on Monday, November 19, 2007 at 8:08pm. Hey, ok so I am supposed to be helping my cousin this with this physics problem, and this is the only one that has ever stumped me! Neutral metal spheres A and B each of mass 0.2 kg hang from insulating ...

### physics please help!!

Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder. Assume that the ...

### Physics

Can someone please explain the method to solving the following electrostatics problem? Thank you very much. Consider three charged sheets, A,B, and C. The sheets are parallel with A above B above C. On each sheet there is a surface charge of uniform density: –4 x 10^(-5) C/m...

### PHYSICS HELP 3RD REQUEST

A box rests on a plank that is inclined to the horizontal. As the angle between the plank and the horizontal increases, does the component of the weight of the box parallel to the plank increase, decrease, or remain the same? Please just answer Suzanne, you are going to have ...

### physics questions

can you please check my answers? 1.what would be the path of the moon if somehow all gravitational foces on it vanished to zero? -would the path of the moon be arched. 6. is the force of gravity stronger on a crumpled piece of paper than on a indentical piece paper that has ...

### physics

Ok, so I know the different kinds of forces (applied, normal, gravity, parellel, and friction). And I know how to sub in other numbers for those forces ( for example, Parallel force is equal to mass times gravity times sine theta). I also know the "base" equation (a=net force/...

### Finance

Please help me out this problem! :) suppose that I buy a 10 yr bond today for $1000 and the interest rate when the bond is issued is 5 percent. the day after I buy the bond, the market interest rate on 10yr bonds rises to 7percent. if I keep the bond for the full 10 yrs until ...

### Earth Science(Please help)

1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the ...

### physics

please help i cannot figure this out A 0.27 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s. Find the momentum of the ball of dough halfway to its maximum height on the way up. and A 61 kg pole-vaulter falls from rest from a height of 6.6...

### please help! physics

A 1200 kg car is moving at 95 km/h when the driver notices a deer down the road. He immediately moves his foot toward the brake pedal, taking only 0.50 seconds before the car starts slowing down. The brakes cause a net force of 2400 N (backwards) on the car for 2.0 seconds. ...

### physics

when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ...

### physics

*please walk me through equation The patellar tendon attaches to the tibia at the tibial tuberosity. The tibial tuberosity is 7 cm from the center of the knee joint. The patellar tendon pulls at an angle of 35deg to the line passing through the tibial tuberosity and the center...

### LERUNTSE LESEDI SEC SCHOOL

I completed my matric in 2013 and I am examted to diploma with the following subjects 1.Setswana-78%=Level 6 2.English-68%=Level 5 3.Afrikaans-57%=Level 4 4.Maths literacy-47%=Level 3 5.L.O-58%=Level 4 6.Economics-47%=Level 3 7.Business Studies-43%=Level 3 My scoring points in...

### PHYSICS URGENT DR BOB

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m= ...

### HISTORY

(This homework question was removed due to a copyright claim submitted by K12 Inc.) You do NOT have to write me my paragraph, but what I would like is for you to answer each question next to a bullet-point so I can write my paragraph. For example, answer each of these ...

### pipe fitter test certification

Please Help!...I am in need of a study guide for my pipefitters test, or an outline of what's on the test. Unfortunately I am not able to take the class available. PLEASE if you know of one or where one would be available. Any information will be greatly appreciated and a ...

### physics HELPPP please

I am stuck on a question that asks for the resultant force(magnitude + direction) question says : A rope is strung between a car and Joe, the car pulls on the rope with a force of 20,000 newton. joe pulls the rope with a force of 25,000N. what is the resulatant force? dont u ...

### Nuclear Physics

I'm interested in studying Nuclear Physics at the university and would llike to know about the career opportunities avilable for a Bachelor's degree holder.I tried googling and found several but would like to get advising from a tutor who have experience in the field. Thank you!

### Physics PLEASE HELP!

A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 5.09 10-3 kg and a net charge of +6.5...

### physics

A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) time needed for ball to reach max height. B)...

### Physics

A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) time needed for ball to reach max height. B)...

### physics

The circuit shown below has a 100 Ohm resistor and 50 Volt-sec/amp (a unit of inductance called the Henry) inductor connected to a 12V battery. It is a freshman physics tradition that inductors are very poorly The switch is closed at t = 0 seconds. What is the magnitude of the...

### Algebra (please help!)

The seats in a theater are arranged in parallel rows that form a rectangular region. The number of seats in each row of the theater is 16 fewer than the number of rows. How many seats are in each row of a 1161-seat theater? I have no idea how to solve this problem. Please help...

### Physics

Need help ASAP for this one, really hard. to Assignment 11Problem 13.26 Tuning Forks in Neurology Tuning forks are used in the diagnosis of nervous afflictions known as large-fiber polyneuropathies, which are often manifested in the form of reduced sensitivity to vibrations. ...

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

A car experiences rolling (tractive) friction with coecient of friction mut = 0.0200, and turbulent-flow (bv^2) drag, with drag coefficient CD = 0.300. The car has mass (including fuel, which is a negligible fraction of the total) M = 1000. kg and frontal cross-sectional area...

### Physics

The crystalline lens of the human eye is a double convex lens made of material haveing an index of refraction of 1.44. Its focal length in air is about 8 mm which also varies. We shall assume that the radii of curvature of its two surfaces have the same magnitude. (a) Find the...

### algebra

Joseph always throws change into a can and takes it out every two weeks. This time it is all nickels and dimes. There are six times as many dimes as nickels, and the value of the dimes is $4.95 more than the value of the nickels. How many nickels and dimes does Joseph have. (...

### Chemistry

Find the pH: 1) A 0.001M solution of HCl 2) A 7.98 x 10^-2 M solution of HNO3 3) 1098L of a solution containing 8.543moles of HBr 4) 120mL of a solution containing 0.005 grams of hydrochloric acid. Please help me with these four. Out of 20 questions i only didn't understand ...

### Chemistry

CHCl3 + MnO4- = Cl2 + CO2 + Mn+2 Balance the above with half reactions in acidic medium. For the above reaction, can you please show the half reactions...which is getting oxidised...both C and Cl's oxidation # are changing showing both getting oxidised,.how is this possible? ...

### social studies

i need help on some questions: 1. How does totalitarian government gain power and maintain power? 2. What kind of freedoms does totalitarian government have? 3. Who is eligible to vote? 4. Who is in control? Who makes the decisions? how does this change if at all? i need help ...

### Algebra

I am stuck in exponential growth and decay. Here is an example. Can someone tell me how to do this step-by-step please? Here it is... The population of Mexico has been increasing at an annual rate of 1.7%. If the population of Mexico was 100,350,000 in the year 2000, predict ...

### Maths- Trigonometry

4. A,B and C are points on a horizontal plane. A is 75 m from C on a bearing of 210 degrees and the bearing of B from C is 120 degrees. The bearing of B from A is 075 degrees. From A the angle of elevation of the top T of a vertical towel at C is 42 degrees. Find a. the ...

### History

Can someone please help me? At least give me an idea. I really need some help I'm far behind and this one is really giving me trouble. Please help. Thanks. Select one reform movement from the Progressive Era. Describe the movement and its impact on South Carolina. Provide ...

### calculus

Please help!! Okay so my teacher has been away and hasent explained anything to us and we have to find the intercepts, critical points, intervals of increase and decrease, points of inflection, intervals of concavity, local maximum or minimum points for each of the following ...

### Algerbra please help

Find the product. 1.(2x)(10x) A:20x*** B:12x C:20x² D:5x 2.-3m(m+8) A:-3m²+24 B:-3m²-24m C:-24m² D:-4m+5*** 3.4d(2d-9) A:8d-36d B:-d C:-28d²*** D:8d²-36d 4.Find the area of the rectangle. 7x+1 ________________ | | | | | | 8x |________________| A:15x+1*** B:56x²+8x C:56x...

### phyics (PLEASE PLEASE READ)

a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend? (b) how for has he ...

### Math Please Check

Please tell me if this are right. Thank you! Find the exact location of all the relative and absolute extrema? h(t) = t^3 - 3t^2 domain: [-1, + infinity) For this one I got x=2 as the minimum, and x=0 as the maximum. g(t) = 3t^4 - 16t^3 + 24t^2 +1 domain: (-infinity, +infinity...

### Algebra B PLEASE HELP

I can't figure this out, please help... A company invests $15,000.00 in an account that compounds interest annually. After two years, the account is worth $16,099.44. Use the function in which r is the annual interest rate, P is the principal, and A is the amount of money ...

### Calculus grade 12 exam review PLEASE HELP ASAP !!

PLEASE HELP ME! Exam is in an hour and i need to finish this exam pre-test to help me ! consider the function y = 2sinx a) determine dy/dx b) calculate the exact value of x for which the slope of the tangent to the graph is √2 in the interval [0, pie] c) determine the ...

### physics

A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 150 meters form the station, it emits a whistle at a frequency of 3000 Hz. What is the ...

### Physics

A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 150 meters form the station, it emits a whistle at a frequency of 3000 Hz. What is the ...

### Physics

A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 150 meters form the station, it emits a whistle at a frequency of 3000 Hz. What is the ...

### Physics

When pressure sores develop from sustained positions, the damage occurs at two locations simultaneously â€“ the superficial layers of skin next to the table, and the deep tissue next to the bony structure (e.g. lateral aspect of the femur) that the patient is lying on. ...

### Physics

Physics teacher has this question for hw. 38. An electric powered model car starts from rest and moves in a straight-line for 4.0 s. The relationship between time and position is x^2+ 2 t^2 = 32, t in seconds and x in cm. Find the velocity at t= 1 s & t = 3 s. he gave us the ...

### physics

wo fan carts with different fan speeds and different accelerations are started from rest some distance from one another. Cart A begins at position 0 with a velocity of zero and an acceleration of aA to the right. Cart B begins at position xB with a velocity of zero and an ...

### Physics please check

A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open at the top. Friction is absent. The spring constant of the spring is 4000 N/m. The piston has a negligible mass and a radius of 0.022 m. (a) When air beneath the piston is ...

### Physics- HELP PLEASE!

Four charges are placed at the four corners of a square of side 15 cm. The charges on the upper left and right corners are +3 µC and -6 µC respectively. The charges on the lower left and right corners are -2.4 µC and -9 µC respectively. The net electric force on -6 µC ...

### physics

please tell me if this is done correctly Find the final equlibirum temperature when 10.0 g of milk at 10.0 degrees C is added to 1.60 * 10^2 g of coffee with a temperature of 90.0 degrees C. Assume the specific heats of coffee and milk are the same as for water(Cp,w=4.19J/g*...

### physics ap

Sir Lost-a-Lot dons his armor and bursts out of the castle on his trusty steed Tripper in his quest to rescue fair damsels from drag- ons. Unfortunately his valiant aide Doubtless lowered the drawbridge too far and finally stopped it 30 below the horizontal. Lost- a-Lot ...

### Physics. Help please

A small permanent magnet is located on the x-axis with the center at <15,0,0>cm. The magnet’s North pole is at location <14.5, 0, 0>cm and the South pole is at location <15.5, 0, 0>cm. A current loop is placed in the y-z plane, such that its center is at ...

### Math

Jim wants to plant pansies in his new planter. How much potting soil should Jim buy? Round to the nearest centimeter. Hint: The height is 100 cm and the diameter is 40 cm. My teacher said to use a specific formula. Out of that formula I got 125,664, but I do not know how to ...

### movie physics

I need to come up with a movie that defies the laws of physics, at least three different times, and has a good way/enough information to prove that they are wrong. Can anyone think of a good movie? Armageddon, Star Wars, is taken.

### Movie physics

I need to come up with a movie that defies the laws of physics, at least three different times, and has a good way/enough information to prove that they are wrong. Can anyone think of a good movie? Armageddon, Star Wars, is taken.

### math 012 please help explain

can someone please help explain how to do this problem. i have a previous posting where i tried to work the problem out, and someone tried to explain where i was confused, but im still confused. 4(2n+1)=3(6n+3)+1

### Physics

2. Tyler pulls a box full of baby ferrets across the floor by means of a rope that is tied to the box. The rope makes an angle of 41 degrees with the horizontal and tyler pulls on the rope with a force of 60N. a)What is the horizontal component of the force that tyler is ...

### Physics

Please Help ! A child throws a snowball at a tree and it sticks to the tree. Does this motion defy the Law of Conservation of Momentum? Explain. The Law of Conservation of Energy states: "If there is no net force acting on a system of objects, the total momentum in that system...

### physics

1.) The average sound intensity inside a busy neighborhood restaurant is 3.*10^-5 W/M^2. How much energy goes into each ear (area = 2.1 * 10^-2 m^2) during a one hour meal? 2.) A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity ...

### Physics

A physics student wants to build a spring gun that when aimed horizontally will give a 35.0- g ball an initial acceleration of 'g' by releasing a spring that has been compressed 18.0 cm. What is the velocity of the ball as it emerges from the gun?

### physics

Explain what ideas led Bohr to suggest a new atomic model; and state Bohr postulates. Explain also, in words, what the correspondence principle is in atomic physics.

### Physics

A 5000-Hz car horn is blasted while the car is moving at 35.0 m/s toward a dazed physics student (stationary). What is the frequency of the horn heard by the student. Assume the temperature is 0°C

### Chemistry-Help Please

Help please. Am doing a past exam paper and I hit a road block with this question: Chloride in a brine solution is determined by a precipitation titration. A 10.00 mL aliquot of the solution is titrated with 15.00mL of standard 0.1182 M AgNO3 solution. The excess silver is ...

### math

500 students sat for an examination in mathematics,physics and chemistry.45 passed all the three subject,60 passed mathematics and chemistry,70 passed physics and chemistry,50 passed mathematics and chemistry,10 passed in mathematics,80 passed in chemistry and 35 passed at ...

### Physics

A. Calculate the force on an alpha particle in an electric field E=Exm where E=3.6E4 N/C and x is a unit vector in the x direction. What is the direction of the force? B. Calculate the acceleration of the alpha particle in this electric field. What is the direction of the ...

### Please Help

A bottle contains 0.5 quarts of grape juice. Keisha will use o.2 of the grape juice to make fruit punch. How much grape juice will keisha use for the fruit pumch? a. 0.3 b. 0.2, c 0.1 or d 0.01 I chose 0.3 but according to the teacher's edition it says the corrcect answer is c...

### Math

Can someone please show me step by step how to solve the following 72.18=3.90625(1+g)/(0.12-g) 8.6616-72.18g=3.90625+3.90625g 4.7554=76.08625g 0.0625=g My question is how did they arrive at 8.6616-72.18g=3.90625+3.90625g step? Please break it down for me.

### Science Please Help!!!

State how matter moves through the biosphere. State how energy moves through the biosphere. Explain each statement using examples to illustrate your explanation. What are some examples of each way of movement through the biosphere? Can someone please help??? Thanks! (=

### algebra

Im begging! please someone teach me how to answer this! when 3 times a number is added to the square of a number the result is ten find the number. I don't know where to start but please teach me or tell me the process to answer this,even just a process. I can answer this if ...

### PHYSICS HELP PLEASE

The spring constant of a toy dart gun is 4442 N=m. To cock the gun the spring is compressed 1.5 cm. The 8 g dart, fired straight upward, reaches a maximum height of 26 m. The acceleration of gravity is 9.81 m/s2 : Determine the magnitude of the energy dissipated by air ...

### English

How is Hamlet hypocritical with Rosencrantz and Guildenstern? Provide 2 examples. Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. Be sure to go back into your textbook or use...

### Physics

Please help me with these three questions. They deal with coefficient of friction 1) A car rounds a turn of radius 25m at a speed of 20m/s. Find the coefficient of friction neccessary to keep the car on the road 2) A man is attempting to slide a piece of furniture weighing ...

### Physics

Please help me with these three questions,they deal with coefficient of friction 1) A car rounds a turn of radius 25m at a speed of 20m/s. Find the coefficient of friction neccessary to keep the car on the road 2) A man is attempting to slide a piece of furniture weighing 750N...

### Physics

A girl is sledding down a slope that is inclined at 30º with respect to the horizontal. The wind is aiding the motion by providing a steady force of 131 N that is parallel to the motion of the sled. The combined mass of the girl and the sled is 59.9 kg, and the coefficient of...

### Physics

Multiple choice please help. How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s? a. 100 J. b. 50 J. c. 10 J. d. 5 J. The airbag in a car works in a collision by . . . a. increasing the time of the impact to the person. b. reducing the impulse to the ...

### Physics

which of the following is NOT true about the path of a cannon ball launched horizontally from the earth's surface if air resistance is neglected? a. the cannnonball has a uniform horizontal velocity b.the total velocity of the cannon ball increases as a function of time c.the ...

### Physics (Classical)

John and Mary are skating at an ice rink. John skates at a constant speed of 6.7 m/s, with respect to the ice surface, directly south. Mary skates at a constant speed of 11.5 m/s in a direction of 34° west of south, with respect to the ice. What are the magnitude and ...