Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 27

**Calculus**

i need help finding area under curve of:2y=sqrt(3x),y=4, and 2y+1x=4

**math**

i need help finding area under curve of:2y=sqrt(3x),y=4, and 2y+1x=4

**Physics**

Four particles in the xy plane have the following masses and coordinates: 1 kg at (4 m, 4 m), 2 kg at (−3 m, 5 m), 3 kg at (5 m, −2 m) and 4 kg at (−2 m, −4 m). Find the total moment of inertia about: a) the x-axis: kg*m2 b) the y-axis: kg*m2 b) the z-a...

**physics**

A child of mass 40 kg stands beside a circular platform of mass 90 kg and radius 1.6 m spinning at 2.8 rad/s. Treat the platform as a disk. The child steps on the rim. a) What is the new angular speed; b) She then walks to the center and stay there. What is the angular velocit...

**physics**

A circular disk of mass 0.2 kg and radius 24 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.4 rad/s. a) Find the new angular velocity of the combination; rad/s b) The change in the kinetic ...

**physics**

A turntable with a moment of inertia of 0.014 kg*m2 rotates feely at 2.7 rad/s. A circular disk of mass 500 g and diameter 22 cm, and initially not rotating, slips down a spindle and lands on the turntable. a) Find the new angular speed. rad/s b) what is the change in kinetic...

**Physics**

At t = 0 s a flywheel is rotating at 25 rpm. A motor gives it a constant acceleration of 0.8 rad/s2 until it reaches 100 rpm. The motor is then disconnected. How many revolutions are completed at t = 23 s?

**Physics**

whhere did u get this part from: 40*(x-50), the 40 is the mass of the ruler but what about the 50?

**Physics**

A uniform meter stick of mass 40 g is used to suspend three objects as follows: 20 g at 0.13 m, 25 g at 0.41 m and 40 g at 0.64 m. Where could you place your finger to balance the stick in the horizontal position?

**Physics**

A ladder of mass M and length 2 m rests against a frictionless wall at an angle of 47 degrees to the horizontal. The coefficient of static friction between the ladder and the floor is 0.5. What is the maximum distance along the ladder a person of mass 13M can climb before the ...

**PHYSICS**

(1 pt) An aricraft carrier has a mass of 8.9 x10^7kg and can cruise at 55 km/h. a) What is the work required to stop it? J b) What constant force could stop it in 6 km? N a) If only half of the work required to stop it is done, what is its final speed? km/h

**Math please help!**

Find the equation of the tangent line to the curve: 2(x^2+y^2)^2 = 25(x^2-y^2) at the point ( 3 , 1 ). The equation of this tangent line can be written in the form y = mx+b

**Math**

Find the equation of the tangent line to the curve: 2(x^2+y^2)^2 = 25(x^2-y^2) at the point ( 3 , 1 ). The equation of this tangent line can be written in the form y = mx+b

**Physics**

A circular off ramp has a radius of 74 m and a posted speed limit of 50km/h. If the road is horizontal, what is the minimum coefficient of friction needed?

**math**

Solve the equation in the interval [0,2pi]. List all solutions tan^2(x)+0.8 tan(x)-3.84 = 0

**Physics**

A 55 kg person stands on a scale in an elevator that accelerates downward at 3 m/s2. a) What is the scale reading? N b) What is the person's weight? N

**Physics**

can u explain with steps, i dont understand. Thanks

**Physics**

A particle of mass 2.7kg has an initial velocity of 5i+5j m/s. It is acted on by a force 2i-4.5j N for 2s. What is its final velocity?

**Physics**

A hot-air balloon has a total mass of 720 kg. It accelerates downwards (towards the ground) at 2.7m/s^2 even though an upwards lift force in acting on it. Find a:Find the lift force acting on the balloon B)What must be the total mass that needs to be thrown overboard if the op...

**physics**

doesnt say, but i already solved for time,3.78s

**physics**

A ball is thrown horizontally at 15 m/s from a clifftop 70 m above the sea level. Find: a) the time to land; b) the angle at which it hits the water; ° below the horizontal c) the speed at which it hits the water. m/s

**pHYSICS**

A ball is thrown horizontally at 15 m/s from a clifftop 70 m above the sea level. Find: a) the time to land; s b) the angle at which it hits the water; ° below the horizontal c) the speed at which it hits the water. m/s

**Physics**

A ball is thrown horizontally at 15 m/s from a clifftop 70 m above the sea level. Find: a) the time to land; s b) the angle at which it hits the water; ° below the horizontal c) the speed at which it hits the water. m/s

**Physics**

A plane dives at 37° to the horizontal and releases a package at an altitude of 380m. If the load is in the air for 4s, find: a) the speed of the plane when it released the package; b) the horizontal distance traveled by the package after it is released.

**physics**

how do u solve v?

**physics**

A basketball is thrown at 45° to the horizontal. The hoop is located 4.5m away horizontally at a height of 1m above the point of release. What is the required initial speed?

**statistics**

An ecologist uses the line, based on 13 colonies, to predict how many birds will join another colony, to which 54% of the adults from the previous year return. What is the prediction? Give your answer to two decimal places, and use the regression line exactly as it appears in ...

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