1. Pre-Calculus

    Which one of the following situations would have a graph that is a constant function? (5 points) (Points : 5) The amount of money that someone earning $10.75 per hour would make The total number of days in September each year The amount of rainfall in New York throughout the ...
  2. PHYSICS 6A centripetal acceleration

    A jet pilot takes his aircraft in a vertical loop. If the jet is moving at a speed of 1100km/h at the lowest point of the loop: A)Determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 5.5g's B)Calculate the 68kg ...
  3. Physics

    A daring 510-N swimmer dives off a cliff with a running horizontal leap. What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?
  4. physics

    A 20.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong wind bends the pole much as a horizontal force of 900 N exerted at the top would. How far to the side does the top of the pole flex?
  5. Clinical Calculations

    Suppose that the adult dosage for a given medication is 150 milligrams​ (mg) per day for every 9 kilograms​ (kg) of body weight. ​a) At this rate find the daily dose for a man who weighs 117 kg. ​b) If the man is to receive 500 mg of this medication every 8​ hours, ...
  6. physics

    a remote controlled car's wheel accelerates at 22.4 rad/s^2. if the wheel begins with an angular speed of 10.8 rad/s what is the wheel's angular speed after exactly 3 full turns?
  7. calculus

    A box of volume 72m^3 with square bottom and no top constructed out of two different materials. The cost of the bottom is $40/m^2 and the cost of the sides is $30/m^2. Find the dimensions of the box that minimize the total cost. How do I set up the equation(s) in the beginning...
  8. Physics

    A block is released from the top of a frictionless incline plane as pictured above. If the total distance travelled by the block is 1.2 m to get to the bottom, calculate how fast it is moving at the bottom using Conservation of Energy.(incline 20 degrees mass of block is 2.5kg)
  9. Math

    hi how would we solve a question like this? for the curve with eq'n 2x^2 - x - 1 y= _______________ x^2 - 2x - 3 determina all x- and y-intercepts I assume you meant y = (2x^2 - x - 1)/(x^2 - 2x - 3) both top and bottom factor but there is no advantage gained. However, the ...
  10. Math

    John is passing out RED, WHITE, and BLUE construction paper for an art project. There are (12) people in his group. John, who likes to show off, tells everyone to watch closely as he hands out the paper. The first person gets a RED paper. John puts the second paper at the ...
  11. math

    The ratio of an object's weight on Earth to its weight on Neptune is 5 : 7. How much would a person who weighs 150 pounds on Earth weigh on Neptune?
  12. Math

    For 3 person relay, a coach can choose from 4 of his top runners. How many different 3- person teams can he choose?
  13. math

    You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an ...
  14. Geometry

    Find the value of x. There is two lines, they are not parallel. In between (connected) those two lines is a shape. A trapezoid by the looks of it. It is wide at the bottom and thin at the top. There are equations outside of the shape, so external angles. Upper left: (x + 16) ...
  15. science

    During a competition, a 60kg cyclist rides along a horizontal road on a bike with a mass of 5kg. During her ride, she changes gears and uses the chain wheel with a radius of 7.5cm and 36 teeth, and the rear sprocket with 18 teeth. The pedal handle is 20 cm in length. a) ...
  16. physics

    An automobile travelling with an initial velocity of 25m/s is accelerated to 35m/s in 6 second. The wheel of automobile is 80cm in diameter. Find the angular acceleration
  17. Biomechanics

    A cyclist is pedaling on his bicycle. If they travelled 18.1 km in 1.0 hours and the diameter of his wheel is 69.3 cm, what was the cyclist's average angular velocity in revolutions per minute (rpm)?
  18. algebra 1

    Once trees grow to a certain height, the trunks quit growing taller and only grow thicker. The forest rangers want to calculate the diameter of the cross-section of some trees in order to estimate how much they grew in the past year. They measured the circumference of the ...
  19. Math

    For a 3-person relay race, a coach can choose from 4 of his top runners.how many different 3- person teams can he choose ? Use the act it out strategy.
  20. Math

    For a 3-person relay race, a coach can choose from 4 of his top runners.how many different 3- person teams can he choose ? Use the act it out strategy.
  21. physics

    A motorcyclist is traveling along a road and accelerates for 4.45 s to pass another cyclist. The angular acceleration of each wheel is +6.35 rad/s2, and, just after passing, the angular velocity of each wheel is +75.6 rad/s, where the plus signs indicate counterclockwise ...
  22. statistics

    Analyze data to determine whether or not you think there is a relationship between height and ability to lift weights (at least as measured by the bench press). 1- Compute a linear regression line to fit this data, also2- compute the correlation coefficient and coefficient of ...
  23. physics

    A 49.7-cm diameter disk rotates with a constant angular acceleration of 2.7 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time.
  24. Physics

    A flywheel with a diameter of 2.45 m is rotating at an angular speed of 74.1 rev/min. (a) What is the angular speed of the flywheel in radians per second? (b) What is the linear speed of a point on the rim of the flywheel? (c) What constant angular acceleration (in revolutions...
  25. psy - please revise

    Question? What are some of the characteristics of a Type A personality? How could having a Type A personality affect a person’s reaction to stress? What would you view as some advantages or disadvantages of a Type A personality? Answer! A person with a type A personality ...
  26. Hypothesis Testing - maths

    Data were collected on the differences in weight gains of 12 people one month after they stopped smoking, compared with their weight at the time when they stopped smoking. The data are given in Table 2. A positive quantity corresponds to a gain in weight, a negative quantity ...
  27. GEOMETRY PARALLELOGRAM QUESTION PLEASE HELP!

    If ON=8x-8, LM=7x+4, NM=x-5, and OL=3y-6, find the values of x and y for which LMNO must be a parallelogram. {O is on the left, N is on top right, L is on bottom left and M is on bottom right} Thank You :)
  28. Physics

    A solid of density 5000 kg/m^3 weighs 0.5 kgf in air.It is completely immersed in water of density 1000 kg/m^3. Calculate the apparent weight of the solid in water.
  29. College Physics Help

    A thin rod (length = 1.10 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from rest, tips over and ...
  30. Precalculus with trigonometry

    I REALLY NEED HELP WITH THIS Della Casee is riding a racing bike at a speed of 50.4 km/h. the wheels have a diameter of 70 cm. Find the angular velocity of the wheel in radians per second.
  31. Physics

    A 0.60-kg basketball is dropped out of the window that is 6.1 m above the ground. The ball is caught by a person whose hands are 1.2 m above the ground. (a) How much work is done on the ball by its weight? (b) What is the gravitational potential energy of the basketball, ...
  32. science

    True or false A.the moon revolves around the earth B.it takes one year for the earth to revolve around the sun Che earth rotates once a day
  33. FSCJ

    please help!! A storage tank 32 m high is filled with pure water. (Assume the tank is open and exposed to the atmosphere at the top.) (a) Find the gauge pressure at the bottom of the tank. (b) Calculate the magnitude of the net force that acts on a square access hatch at the ...
  34. please check

    If a wheel turns with a costant rotational speed then: each point on its rim moves with constant roational velocity, each point on its rim moves with constant translational acceleration, the wheel turns with constant translation acceleration, the wheel turns through equal ...
  35. math

    what is the weight of a ten foot length of steel pipe? the inside diameter of the pipe is 3/4 of an inch, and the outside diameter i one inch. steel weighs 490lbs. per cubic foot.
  36. math

    what is the weight of a ten foot length of steel pipe? the inside diameter of the pipe is 3/4 of an inch, and the outside diameter i one inch. steel weighs 490lbs. per cubic foot.
  37. Circle Geometry

    A wheel has radius 30 cm.It rolls along the ground toward a tack that is 58cm from the point where the wheel currently touches the ground. What is the distance between the tack and the closest point on the circumference of the wheel! I don't understand thus it all! Please help...
  38. Statistics

    It's a simple question I am just so confused with this discrete probability distribution. The question is: In the New Jersey Pick 3 game, you pay $.50 to select a sequence of three digits, such as 911. If you play this game once every day, find the probability of winning ...
  39. Physics

    A ladder (L = 7.80 m) of weight WL = 360 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it. A firefighter, whose weight is 889 N, ...
  40. Physics

    A star with the same mass and diameter as the sun rotates about a central axis with a period of about 29.2 days. Suppose that the sun runs out of nuclear fuel and collapses to form a white dwarf star with a diameter equal to that of the earth. Assume the star acts like a solid...
  41. physics

    CRITICAL THINKING: The term ”weight” in physics has the following very specific meaning: “The weight of an object is the name given to a particular force: the gravitational force exerted by the earth on the object, giving it an acceleration of 9.8 m/s2 near the surface ...
  42. physics

    CRITICAL THINKING: The term ”weight” in physics has the following very specific meaning: “The weight of an object is the name given to a particular force: the gravitational force exerted by the earth on the object, giving it an acceleration of 9.8 m/s2 near the surface ...
  43. Time rates

    A ladder 20 ft long is leaning against an embankment inclined 60 degrees to the horizontal. If the bottom of the ladder is being moved horizontally toward the embankment at 1 ft/sec, how fast is the top of the ladder moving when the bottom is 4 ft from the embankment?
  44. math

    a plat form and a building are on the same horizontal plane , the angle of depression of the bottom of the building from the top A of the platform is 39 degree. the angle of elevation of the top D of the building from the top of the platform is 56 degree. given that the ...
  45. Physics

    A stone dropped from certain point crosses the top and bottom ends of a vertical pole of length 20m in one second the distance of top of the pole from the initial point of release will be (g=10) Ans:11.25m
  46. Physics

    Figure 18-46 shows a hydraulic lift operated by pumping fluid into the hydraulic system. The large cylinder is 40 cm in diameter, while the small tube leaving the pump is 1.7 cm in diameter. A total load of 2500 kg is raised 2.2 m at a constant rate. Neglect pressure ...
  47. Pre Calculus

    If you are riding on a Ferris wheel that is 60 feet tall and it takes 5 minutes to make a one revolution, what is your linear velocity? A. 0.62 feet per second B. 0.31 feet per second C. 37.68 feet per second D. 3.14 feet per second E. 9.42 feet per second
  48. Physics

    A 56.5kg, 2.4m uniform ladder leans against a frictionless wall. A 95.5kg person is standing up 0.8m from the bottom of the ladder. The ladder makes an angle of 57 degrees with the horizontal. The coefficient of static friction between th eladder and the ground is 0.15. What ...
  49. Engineering

    A person rappels down a cliff. The person uses a 0.5 inch diameter rope, creating a 170-lb internal force. What is the normal stress in the rope. I got 340 by diving 170 from .5 is this right?
  50. physics

    An amusement park ride consists of a rotating circular platform 8.09 m in diameter from which 10 kg seats are suspended at the end of 2.19 m mass less chains. When the system rotates, the chains make an angle of 14.8 ◦ with the vertical. The acceleration of gravity is 9....
  51. physics

    A solid sphere of weight 36.0 N rolls up an incline at an angle of 30.0o. At the bottom of the incline the center of mass of the sphere has a translational speed of 4.90 m s-1. Isphere = 2/5mr^2. What is the kinetic energy of the sphere at the bottom of the incline? How far ...
  52. Physics

    A man's gold wedding ring has an inner diameter of 2.0cm at 30∘C. Part A If the ring is dropped into boiling water, what will be the change in the inner diameter of the ring?
  53. math

    There is on large rectangle ABCD, top line is AD and bottom is BC. A line is drawn from the top to bottom called GH. A line is drawn from left to right called EF. AEFG is Rectangle 1. EBHF is Rectangle 2. GHCD is Rectangle 3. All three rectangles are similar. Length of line AE...
  54. Physics please help!!

    A 60cm diameter bike wheel starts at rest and develops an angular speed of 12.0 rad/s in 10 seconds. What linear distance does the bike travel?
  55. physics

    The wheel of a car has a radius of 0.390 m. The engine of the car applies a torque of 466 N·m to this wheel, which does not slip against the road surface. Since the wheel does not slip, the road must be applying a force of static friction to the wheel that produces a ...
  56. 11th grade

    A person, who weighs 688N, swings from a cliff at the end of a convenient vine that is 18m long. From the top of the cliff to the bottom of the swing he descends by 3.2m. The vine will break if the force on it exceeds 950N. a) Does the vine break? b) If no, what is the ...
  57. physics

    thus far in the course we have ignored that on the earths surface an object must have a slightly unbalanced force to rotate with the earth, pretending that the normal force precisely balances the objects weight. A student with a mass of 65.0kg stands at the equator. The radius...
  58. Physics

    A washing machine needs 17.9 s to speed up from rest to top speed of 5 rotation for every 2.78 s. If the damp cloths inside are 7.13 cm from the center, what is it's radial acceleration at top speed?
  59. Mechanics/Physics

    HW7_1B_2 : 5.0 POINTS Let's say that a cross section where you have M+max is at location x+max, and the cross section where you have M−max is at location x−max. Use the MATLAB window below to plot the profiles of stress on sections x+max and x−max, i.e. σ...
  60. physics

    A ladder (ℓL = 7.50 m) of weight WL = 350 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it. A firefighter, whose weight is 886...
  61. Physics

    how far from the center of the earth would a person with a weight of 469N on earth have to be to have a weight off 55.4N?
  62. English

    Look at the pictures. Look at Einstein first. He is a physicist. Let's go counterclockwise. The next person is Namjoon Baek. He is the person on the top of the page. Look at the next person. Go counterclockwise, and you can see a person. He is Winston Churchill. The next ...
  63. PHYSICS

    A ball on a string moves in a vertical circle. When the ball is at its lowest point, the tension in the string is equal to the ball's weight. (i said true..?) A small projectile is launched horizontally 1 m above the surface of a smooth, airless planet, with sufficient speed ...
  64. Geometry PARALLELOGRAM question?

    If ON=8x-8, LM=7x+4, NM=x-5, and OL=3y-6, find the values of x and y for which LMNO must be a parallelogram. {O is on the left, N is on top right, L is on bottom left and M is on bottom right} Thank You :)
  65. Physics

    The wheel of a car has a radius of 0.390 m. The engine of the car applies a torque of 282 N · m to this wheel, which does not slip against the road surface. Since the wheel does not slip, the road must be applying a force of static friction to the wheel that produces a ...
  66. physics

    A car is sitting at the top of an inclined plane, which is 5.2 meters long and meets the horizontal at an angle of 12 degrees. The cart is then allowed to roll to the bottom of the incline. What will be the velocity of the cart at the bottom of the incline. (4.61m/s) Please ...
  67. physics

    A 0.34 kg pendulum bob is attached to a string 1.2 m long. What is the change in the gravitational potential energy of the system as the bob swings from the bottom of the string, where θ = 37°? i don't know how to do this. The bottom of the string is 1.2 m and it moves ...
  68. math

    Every year there is a race to the top of the empire state building. In 1993 the winner got to the top in 10 minutes, 18 seconds. how many stairs did the winner go up per second, rounded to the nearest whole number
  69. physic

    HI!can anyone help me please, just on part b.Thank you so much. A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 94°C? ___ cm (b) What temperature change is required to increase its volume by 0.9%? ...
  70. Physics

    The diameter of the base of a tapered drinking cup is 6.6cm . The diameter of its mouth is 9.8cm . The path of the cup curves when you roll it on the top of a table. How much faster does the mouth move than the base? Express your answer using two significant figures.
  71. Trig

    a person who eyes are 5 feet above the ground observes the top of a building to have an angle of elevation of 40 degree. The person walks 100 feet closer to the building and observes that the top of the building now has an angle of elevation of 65 degree. How high is the ...
  72. geometry

    Find the values that make this a parallelogram? The parallelogram is a square ans the values are: on the outside of it is 17 y and 8y on the top and on the bottom it is 10 and 8x On the inside of the square it is (3y-20) on the left hand corner and on the right hand it is (4y+...
  73. lambton

    A rotating flywheel of diameter 48.0 cm uniformly accelerates from rest to 240 rad/s in 15.0 s. Find the linear velocity of a point on the rim of the wheel after 15.0 s. Round answer to one decimal place.
  74. math

    A right circular conical tank, point down, with top radius of R and height H is fully filled with a liquid whose weight-density, d, depends on its depth from its surface as d(z) = az + b, where a and b are constant. What is the weight of the liquid in the tank.
  75. geometry d the sspeed of the bicycle in m/s

    a bicycle wheel has 77cm in diameter and makes revolution per second .find the speed of the bicycle in m/s
  76. physics

    A 1400-N uniform boom at ϕ = 70.0° to the horizontal is supported by a cable at an angle θ = 20.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2250 N hangs from its top. (a) Find the tension in the ...
  77. science

    The seasons change BC A.the earth rotates slowly or B. The earth is tilted on its axis as it revolves around the sun
  78. physics

    Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.5 rad/s. The acceleration continues until t = 17 s, when the acceleration abruptly changes to 0 rad/s2. Through what angle does the wheel ...
  79. physics

    Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.5 rad/s. The acceleration continues until t = 17 s, when the acceleration abruptly changes to 0 rad/s2. Through what angle does the wheel ...
  80. Physics

    Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.9 rad/s. The acceleration continues until t = 19 s, when the acceleration abruptly changes to 0 rad/s2. Through what angle does the wheel ...
  81. sci

    would you consider an animal, like lion on top of the food chain, or the very bottom? ya never know what's out there... but ya, personally i'd consider lions at the top of the food chain. The food chain is determined by who eats whom. At the top of the food chain, that animal ...
  82. Science - Chromatography

    I performed a TLC of plant pigments in my lab class with a solvent of petroleum ether/ acetone (7:3) and used a silica gel plate. It is expected that the most polar pigments (chlorophyll) will be located near the bottom and the carotenoids near top. In my experiment, it was ...
  83. math!!!!!!!!!

    if one light gray hexagon is worth one whole,what fractional part of the hexagon is one black triangle. what fractional part of the hexagon is one dark gray rhombus. what is the total sum off all the pattern blocks.
  84. math

    Devon's bike has wheels that are 27 inches in diameter. After the front wheel picks up a tack, he rolls another 100 ft and stops. How far above the ground is the tack?
  85. maths

    find the speed of a point on the rim of a 24-cm diameter fly -wheel which is tuning at 2800 revolutions per minute. give your answer in meters per second.
  86. Physics

    A railroad flatcar of weight W can roll without friction along astraight horizontal track. Initially, a man of weight w is standing on the car, which is moving to the right with speed v_0. What is the change in velocity of the car if the man runs to the left so that his speed ...
  87. ELA

    1.Which is the BEST way to improve this sentence? Our leaders believed that was the way to make the country the best it could be. A. Change believed to believe B. Change believed to did not believe C. Change make to made D. Change could be to could not be 2.What change if any ...
  88. physics

    an aeroplane has a mass of 15 tonnes. At cruising speed,air flows over the top of it's wing at 150 m/s and under the wing at 120m/s. Calculate the pressure in difference between the top and the bottom of the wing and the surface area underside the wing
  89. su

    A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal (remember, 1 Calorie = 1 kilocalorie). When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How long, in days, would the person have to sleep ...
  90. physics

    A mass M can slide with negligible friction inside a tube bent in a circle of radius R = 1.45 m. The tube rotates about its diameter; the mass is in equilibrium at ¦È = 47.3¡ã. Calculate the number of revolutions the hoop makes in 115 s.
  91. maths

    hw do l wrk ths out: A record has a diameter of 30cm and rotates at 33 n 1/3 revolution per minute. Hw far does a point on the edge of the record travel in a minute? (use the 3,4 for pie n gve answer in metres
  92. Physics

    A man of mass 82 kg is using crutches. the crutches make an angle of 26 degrees with the vertical. Half the person's weight is supported by the crutches. Assuming that the person is at rest, find the magnitude of the force supported by each crutch. the way i did this question ...
  93. physics

    A man of mass 82 kg is using crutches. the crutches make an angle of 26 degrees with the vertical. Half the person's weight is supported by the crutches. Assuming that the person is at rest, find the magnitude of the force supported by each crutch. the way i did this question ...
  94. Math

    Marco is making a scale model of a building. The building has a round deck at the bottom with a diameter of 120 meters. What should the diameter of the deck in the scale model be if Marco wants the circumference to be 1/40 actual size?
  95. Physics

    a kid slides down an icy hill starting from rest. At the top his gravitational potential energy is 500J. His kinectic energy at the bottom will be? After reaching the bottom he then continues sliding up another icy slop on the other side, when he finally comes to a stop he ...
  96. calculus

    a ladder 6 feet long leans against a vertical building. the bottom of the ladder slides away from the building horizontally at rate of 1/2 ft/sec. A) at what rate is the top of the ladder sliding down the wall when the bottom of the ladder is 3 feet from the wall? b)at what ...
  97. Physics

    Ball, with a weight of 200 grams, tied to a string rotates around in a horizontal plane. Period of rotation is 2 seconds. What is the force (in N) which acts on the string? The length of the string is 0.5 meters.
  98. calculus

    Use Fundemental Theorem of Calculus part 1 to find the derivatives of the following: (i) F(x)=Integral ( top3, bottom x) e^-t^2 dt (ii) G(theta)=Integral ( top cos theta, bottom sin theta) 1/1-x^2 dx
  99. calculus

    : A 20m ladder is placed against a wall. The bottom of the ladder is slipping at the rate of 2m/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 12m from the wall
  100. Physics

    Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min, assuming the belt does not...
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