A Ferris Wheel, 24.0 m in diameter, rotates once every 12.5s. What is the fractional change in a person's apparent weight: a) at the top, and b) at the bottom?
57,675 results, page 15

math
penny farthing had a large front wheel radius 65cm and a small back wheel radius 25 cm. how many times did the back wheel turn for each turn of the front wheel? 
pseudo code algorithm
Write a pseudo code algorithm which: • Determines the average weight of a person over a particular year. • For each month, your algorithm should input the person's weight for that month (a positive real number). Your algorithm should loop, repeating the input, until the ... 
physics
Piston circled 1 in the figure below has a diameter of 0.28 in.; Piston circled 2 has a diameter of 1.6 in. In the absence of friction, determine the force vector F necessary to support the 500lb weight. in lb i got 1.53 lb but it is incorrect 
physics
Lora (of mass 42.8 kg) is an expert skier. She starts at 2.3 m/s at the top of the lynx run, which is 114 m above the bottom. What is her ﬁnal kinetic energy at the bottom of the ski run? Answer in units of J 
Phizzics....
How does the weight of a Mars lander change as it travels from Earth to Mars? Does the weight ever equal zero? Does the mass of the lander change? Explain your answer. (Hint: restrict your analysis to a system consisting of Earth, Mars and lander.) 
maths
Please help. Thank you Fourteen people attend a meeting. If each person shook hands with every other person, how many handshakes were there altogether? 
math
At the medal presentation, each person shook hands with every other person. If 10 handshakes took place, how many people were present? 
calculus
A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $2/ft2. The metal for the four rectangular sides costs $3/ft2. Find the dimensions that minimize cost if the box has a volume 20 ft3. Top and bottom should ... 
Geometry
The parallelogram has the angle measuers shown. Can you conclude that it is a rhombus, a rectangle, or a square? Explain. So I'm going to describe the image then I'll give what I think would be a correct answer to explain. (I'm really bad at this) Description: There's a ... 
Physics
Find the number of revolutions of a bicycle wheel of diameter 0.7m when the bike goes a distance of 22m down the street. 
math
If a flywheel is 4 feet in diameter. Find the speed of a belt which drives the wheel at 400 revolutions per minute? 
Science
John Loads A Collapsed Inflatable Boat Into A Twowheel "grocery Type" Handcart. He Used An 8 Foot Long Board To Lengthen The Underside Of The Cart, The End Of The Board Serves As A New Extended Handle For His Cart.Now When He Goes To Pull His Longer Cart, He Is Pulling With ... 
Physics
An airliner lands with a speed of 48.5 m/s. Each wheel of the plane has a radius of 1.25 m and a moment of inertia of 110 kg · m2. At touchdown, the wheels begin to spin under the action of friction. Each wheel supports a weight of 1.40 ✕ 104 N, and the wheels attain ... 
Physics
A potter’s wheel with rotational inertia of 45 kg m2, is spinning freely at 40 rpm. The potter drops a lump of clay onto the wheel where it sticks a distance 1.2 m from the rotational axis at the wheel’s center. If the subsequent angular speed of the wheel is 32 rpm, what ... 
Physics
If you have a 40 inch wheel connected to a 20 inch wheel connected to a 5 inch wheel how many rotations need to make in order for the 40inch wheel to make 1rotation? 
Math
larry starts at the bottom of a long staircase. he climbs exactly 2/3 of the stairs. then he goes back down exactly 1/2 of the way to the bottom. from that spot he climbs exactly 2/3 of the way to the top. finally from there he climbs 6 stairs to reach the top. how many stairs... 
math,mathguru
you asked me about how did i came up with my answer this is what i did: Write each fraction in simplest form. #18 (5x^3y^3)/(20xy^4) = (3X(5)X(x)X(x)X(x)X(y)X(y)X(y))/(2X2X(5)X(x)X(y)X(y)X(y)X(y)) = after canceling the common terms top and bottom i am left with = 3 and 2 ... 
physics
A 400N weight is sitting on a piston. The diameter of the piston is 8 cm. How much pressure does the weight exert on the piston? 
Physics
A waterfall is 1260m high. calculate the change in temperature of the quantity of water that falls from the top to the bottom of the waterfall( neglect heat losses to the surrounding) take g to be 10m/s and specific.heat capacity of water to be 4200j/kg/k. 
physics
A child whose weight is 281 N slides down a 6.20 m playground slide that makes an angle of 45.0¡ã with the horizontal. The coefficient of kinetic friction between slide and child is 0.160. (a) How much energy is transferred to thermal energy? (b) If she starts at the top ... 
Physics
A child whose weight is 292 N slides down a 5.20 m playground slide that makes an angle of 35.0° with the horizontal. The coefficient of kinetic friction between slide and child is 0.130. (a) How much energy is transferred to thermal energy? (b) If she starts at the top with ... 
Physics(Please respond)
A person is riding a bicycle, and its wheels have an angular velocity of 26.0 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 17.6 revolutions. (a) How much time does it take for the bike ... 
English
1. Once you start reading, you cannot stop it. 2. Once you go there, you will be satisfied with the scenery. 3. Once you paly soccer with them, you will like it. 4. Once you lern how to swim, you will like it. 5. Once you begin to learn the guitar, you spend more than 2 hours... 
math
from the top of a cliff 50 m high the angle of depression of the top and bottom of tower are observed to be 30 and 45 degree resp. find h of tower ? 
math
from the top of 50 metre high hill the angle of depression of the top and the bottom of a tower are 30°and45°.find the hight of the tower 
Physics
You have a 40 inch wheel tow 20 inch wheel to a 5 inch wheel how many revolutions does the 5 inch wheel have to make to make the 49 inch wheel rotate 1revolution? 
physics
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 106°C? (b) What temperature change is required to increase its volume by 0.8%? 
math
boxes are stacked one on top of the other. you paint only the sides of each box not top or bottom, but will paint the top at the end of the stack how many faces does he paint in a stack of three boxes? 
physics
Starting at the top of a steep, icy track, a rider jumps onto a sled (known as a skeleton) and proceeds  belly down and head first  to slide down the track. The track has fifteen turns and drops 104 m in elevation from top to bottom. (a) In the absense of nonconservative ... 
Physics. PLEASE HELP!!
A uniform disk with a mass of 130 kg and a radius of 1.2 m rotates initially with an angular speed of 950 rev/min. A constant tangential force is applied at a radial distance of 0.5 m. How much work must this force do to stop the wheel? Answer in units of kJ 
physics
A uniform brass disk of radius R and mass M with a moment of inertia I about its cylindrical axis of symmetry is at a temperature T = 45 °C. Determine the fractional change in its moment of inertia if it is heated to a temperature of 125 °C. (The linear expansion coefficient... 
Physics
A 500.0 kg object is attached by a rope through a pulley to a paddlewheel shaft that is placed in a wellinsulated tank holding 25.0 kg of water. The object is allowed to fall, causing the paddle wheel to rotate, churning the water. If the object falls a vertical distance of ... 
math
how is finding a fractional part of a set different than finding a fractional part of a whole? 
sci
would you consider an animal, like lion on top of the food chain, or the very bottom? on the top... Lion>Zebra>Grass 
physics
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 L = 2.50{\rm m} wide and h = 9.50{\rm m} below the top of the cliff? 
Finite Math
A certain virus infects one in every 500 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. Find the probability that a person does not have the virus given that... 
PHYSICS2, help!
A string is wrapped around the rim of a flywheel 0.400 m in radius, and a steady pull of 50.0 N is exerted on the cord. The wheel is mounted in frictionless bearings on a horizontal shaft through it's center. The moment of inertia of the wheel is 4.00 kg.m^2 .Calculate the ... 
PHYSICS
A string is wrapped around the rim of a flywheel 0.400 m in radius, and a steady pull of 50.0 N is exerted on the cord. The wheel is mounted in frictionless bearings on a horizontal shaft through it's center. The moment of inertia of the wheel is 4.00 kg.m^2 .Calculate the ... 
mathgeometry
a machinery belt runs around two wheels, crossing between them so that the larger wheel turns the smaller wheel in the opposite direction. the diametre of the larger wheel is 36cm, and the diametre of the smaller wheel is 24cm. What is the distance between the two? 
physics
A block of mass 0.570 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point B, the bottom of... 
Physics
A piece of aluminum is attached to a string and suspended in a pool of oil with density 780 kg/m3. If the apparent weight of the aluminum is 590 N, what is the volume of the aluminum? 
Physics
A person is making homemade ice cream. She exerts a force of magnitude 23 N on the free end of the crank handle, and this end moves in a circular path of radius 0.35 m. The force is always applied parallel to the motion of the handle. If the handle is turned once every 1.6 s, ... 
science
The force that every mass exerts on every other mass is called _________. A. gravity B. pull C. matter D. weight 
physics
A spherical steel ball bearing has a diameter of 2.540 cm at 24°C. (a) What is the diameter when its temperature is raised to 82°C? (b) What temperature change is required to increase its volume by 1.1%? I got the first answer right. i am having trouble understanding how to ... 
Physics
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move them together. The coefficient of kinetic friction between the lower package and the ground is 0.3. The person exerts a force of 400N at an angle of ... 
Physics
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move them together. The coefficient of kinetic friction between the lower package and the ground is 0.3. The person exerts a force of 400N at an angle of ... 
math 11
i dontget how the textbook got the answer, h = 30cos[(1.43)x]° + 40 the question is: a paintball is shot at a wheel of radius 40 cm. the paintball leaves a cricuarmark 10 cm from the outer edge of the wheel. As the wheel rolls, the mark moves in a circular motion.assuming ... 
Physics
A rescue helicopter lifts a 65 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 13 m. (a) What is the tension in the cable? N (b) How much work is done by the tension in the cable? J (c... 
Physics
A rescue helicopter lifts a 65 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 13 m. (a) What is the tension in the cable? N (b) How much work is done by the tension in the cable? J (c... 
Physics
A rescue helicopter lifts a 65 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 13 m. (a) What is the tension in the cable? N (b) How much work is done by the tension in the cable? J (c... 
Physics
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 665 on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0... 
Physics
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 665N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0... 
SCIENCE
Some student made a terratium out ot the bottom of 2liter soda bottle.They placeed a layer of gravel on the botton of the bottom of the and the added soil.they sprinkled 1/2 teaspoon of grass seed on top of the soil and added two small plants.Finally they waterd the plant and... 
pre cal
A number of cells decreases by 36% every 9 hours. By what percent does it change every 1 hr... 40 mins...2days 
Physics
A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 18.00 rad/s. The temperature of the wheel changes from 100.0 to +300.0 degrees Celcius. No net external torque acts on the wheel, and the mass of the spokes is negligible. (a) Does the... 
Physics
What is the apparent weight of a 70kg astronaut 3800 km from the center of the earth's moon in a space vehicle moving at constant velocity and acceleration toward the moon at 2.9m/s^2? State the direction in each case. 
Calculus  Optimization
A cylindrical container with a volume of 3000 cm^3 is constructed from two types of material. The side and bottom of the container cost $0.10/cm^2 and the top of the container costs $0.20/cm^2. a) Determine the radius and height that will minimize the cost. b) Determine the ... 
physics
For no apparent reason, a poodle is running counterclockwise at a constant speed of 5.40 m/s in a circle with radius 2.3 m. Let v_1 be the velocity vector at time t_1, and let v_2 be the velocity vector at time t_2. Consider change in v = v_2 v_1 and change in t = t_2  t_1... 
Physics
In a calorimetry experiment, an object of mass M= 9.2 kg falls through a height of 35.5 m and, by means of a mechanical linkage, rotates a paddle wheel that stirs m= 0.92 kg of water. The water is initially at 20∘C. What is the maximum possible temperature rise of the water... 
Physics
There are two particles of charge +Q located on the top left and bottom right corners of a square. What is the direction of the net electric field at the point on the bottom left corner of the square? And also what would be the general equation be for finding the potential ... 
Organic Chem Help :(
For each of the solvents below, indicate whether it will be the top or bottom layer when carrying out extraction of an aqueous layer of density 1.05 g/ml. a) chloroform (bottom layer) b) hexane =????? c) toluene =????? 
Physics/Chemistry
A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 18.00 rad/s. The temperature of the wheel changes from 100.0 to +300.0 degrees Celcius. No net external torque acts on the wheel, and the mass of the spokes is negligible. (a) Does the... 
physics
A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assume that the total energy of the ballEarth system remains constant. (a) What is the tension in the string at the bottom? (Use the following ... 
Physics
A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assume that the total energy of the ballEarth system remains constant. (a) What is the tension in the string at the bottom? (Use the following ... 
Algebra II
suppose you are biking down a hill at 24 mi/h. What is the angular speed, in radians per second, of your 27inichdiameter bicycle wheel? 
math
Josephs tricycle tire has a diameter of 7 inches about how does Joseph travel each time his wheel goes around 5 times 
math
Michael's bicycle tire has a diameter of about 30m. How far does it cover when the wheel makes one complete revolution? 
physics
A thin spherical shell of mass 4.00 kg and diameter 0.200 m is filled with helium (density ρ = 0.180 kg/m3). It is then released from rest on the bottom of a pool of water that is 4.00 m deep. (a) Neglecting frictional effects, show that the shell rises with constant ... 
physics
A thin spherical shell of mass M = 2.00 kg is released from rest at the top of an incline of height H=1.31 m and rolls without slipping to the bottom. The ramp is at an angle of θ = 24.1o to the horizontal. Calculate the speed of the sphere's CM at the bottom of the ramp. 
Physics
A 10cm times 10cm times 10cm wood block with a density of 700kg/m^{3} floats in water. What is the distance from the top of the block to the water if the water is fresh? weight= density*volume*g weight=700*(0.001)*9.81 weight=6.86newton weight=densitywater*g*10cm*10cm*depth 6.... 
Math Trig please help!
A tire with a diameter of 100 cm rotates 20 times in 3 seconds. a) determine the angular velocity b) how far the tire has travelled? c) what is the speed in km/h? 
Physics 6A
A jet pilot takes his aircraft in a vertical loop. If the jet is moving at a speed of 1100 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 5.5 's B)Calculate the 68 pilot's ... 
Calculus
A 20m ladder is leaning against a wall. Top of ladder is sliding down at 3m per second and the bottom is sliding away from the wall at 4m per second. How high is the top of the ladder and far is the bottom of the ladder from the wall. 
physics
A ball is thrown upward off the top of a 30meter high building. 10 meters below the top of the roof, is the top of a window, which is 2 meters high. How long (time) does it take for the ball to pass from top to bottom of the window? What I have so far is: 10 = v(initial) t... 
trig
The angle of depression of the top and bottom of a tower as seen from the top of a 100m high cliff are 30degree and 60degree respectively. find the height of the tower 
Maths : circular motion
1. A 3 metre piece of string is threaded through a hole in the table. If equal portions of the string are above and below the table, and the top mass of 2kg rotates at 1rev/sec , how fast does the bottom mass of 1kg rotate? (in rev/sec) 2. If, in the above question, the two ... 
Physics
An object of mass 7.0 kg falls through a height of 47.0 meters and, by means of a mechanical linkage, rotates a paddle wheel that stirs 0.670 kg of water. The water is initially at 5.5 deg C, What is the maximun possible temperature of the water? (Answer in deg C) 
Physics
A potter’s wheel of radius 53.13 cm and mass 106.4 kg is freely rotating at 47.1 rev/min. The potter can stop the wheel in 5.65 s by pressing a wet rag against the rim and exerting a radially inward force of 66.2 N. What is the angular acceleration of the wheel? 
physics
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is 85.0 m. In part a the person is looking at the base of the antenna, and his line of sight makes an angle of 35.0 with ... 
physics
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person’s eyes and the building is 87.8 m. In part a the person is looking at the base of the antenna, and his line of sight makes an angle of 30.3o ... 
physics
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is L = 81.0 m. In part (a) the person is looking at the base of the antenna, and his line of sight makes an angle of èa... 
Physics
A 20.0kg crate sits at rest at the bottom of a 20.0 m long ramp that is inclined at 40 ∘ above the horizontal. A constant horizontal force of 290 N is applied to the crate to push it up the ramp. While the crate is moving, the ramp exerts a constant frictional force on it ... 
College Math
Water rises inside a plant's stem an average of 4ft. every hour. A. How many inches is that? The answer for this is 48 inches. B)If a plant is 72 in. tall, how long would it take for water to travel from the bottom to the top of the plant? On part B, I didn't understand on how... 
Calculus: limits
Evaluate the limit at t > 25: [25  t] / [5  √(t)] I multiplied it by √(x + 3) to get rid of the square root on the bottom. However, once I'm done distributing it out, I'm not sure I'm doing it right. I get [x√(x+3) + 2x  2] / [x + 5] Once I plug in 25... 
Physics
What is the apparent weight of a 75 KG astronaut 4200 km from the center of the earth's moon in a space vehicle.a) moving at constant velocity, and b) accelerating toward the moon at 209 m/s? state the direction in eachcase 
Math
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 object follows this equation: , where C is a constant, and... 
Math
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 object follows this equation: , where C is a constant, and... 
Calculus
*Optimization problem* I'm okay at some optimization problems, but this one has me stumped. You work for a company that manufactures circular cylindrical steel drums that can be used to transport various petroleum products. Your assignment is to determine the dimensions (... 
Physics
Two blocks of masses 40.0kg and 20.0kg are stacked on a table with the heavier block on top. The coefficient of static friction is 0.600 between the top and bottom blocks and 0.300 between the bottom block and the table. What is the required magnitude of a horizontal force ... 
Math
A man standing 20 m from a tower estimates the angle of elavation of the top and bottom of a flagpole on the tower as 58 degrees and 55 degrees. Calculate the height of the flagpole. How would I go about finding the height of the flagpole? Calculate the height of the bottom: ... 
physics
A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s after the wheel ... 
physics
A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s after the wheel ... 
physics
A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s after the wheel ... 
physics
a brick is dropped form the roof of a building. On the way down it passes a 2m high window and is observed to pass from the top to the bottom of the window in 0.25s. (a) How fast was it moving when it passed the top of the window? (b)How far below the roof of the building is ... 
Physics
A thin rod (length = 1.03 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 ... 
maths
from a point on the ground the angle of elevation of the bottom and top of a flagstaff situated on top of a 120 m tall house is 30 and 45 degrees respectively.find the height of the flagstaff. 
10th grade
how do you calculate the volume of the aluminum block from the apparent change in the volume of water in the cylinder? 
physics
A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s after the wheel ... 
physic
Hi! help me please, Thank you. 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%? I only need help on part b.Thank 
Physics
A pair of constant forces of magnitude F = 11.1 N is applied to opposite sides of the axle of a top, as shown in the figure. The diameter of the axle is d = 8.67 mm. The angle è, which has a value of 36.1°, describes the steepness of the top's sloping sides. The moment of ...