Physics Answers

Water flows at speed of 5.5 m/s through a horizontal pipe of diameter 3 cm . The gauge pressure P1 of the water in the pipe is 1.7 atm . A short segment of the pipe is constricted to a smaller diameter of 2 cm . P1 5.5 m/s 3 cm 1.7 atm P2 v2 2 cm What is the gauge pressure of the water flowing through the constricted segment? Atmospheric pressure is 1.013 × 105 Pa . The density of water is 1000 kg/m3 . The viscosity of water is negligible.

If the density of the heavy liquid is 9.1 g/cm3 , by what height h1 does the heavy liquid rise in the left arm? 1. 0.810883 2. 0.435573 3. 0.39233 4. 0.573983 5. 0.459748 6. 0.544456 7. 0.710862 8. 0.899009 9. 0.641132 10. 0.538315

Bone has a Young’s modulus of about 1.8 × 1010 Pa . Under compression, it can withstand a stress of about 1.67 × 108 Pa before breaking. Assume that a femur (thigh bone) is 0.55 m long, and calculate the amount of compression this bone can withstand before breaking.

What is the electric flux through a sphere of radius 4m that contains a (a)

≠+50 hC and (b) -50 hC charge at its center?

 A 1,000 kg car rounds a curve on a flat road of radius 50 meters at a speed of 50km/hour. Will the car follow the curve or will it skid? Assume a) the pavement is dry and the coefficient of static friction is u=0.60; b) the pavement is icy, coefficient of friction is u=0.25?

Objects with masses of 200kg and 500kg are separated by 0.4m

Find

a)the net gravitational force exerted by these objects on a 50kg object placed midway between them

b) at what position can the 50kg object be placed so as to experience a net force of zero

A copper road whose length at 70°c is 4.0m is heated to 10°c find it

an elephant of mass 1500kg stands on its four legs each of area 0.012m^2, calculate the pressure exerted by each leg of the elephant on the ground.(g=10m/s)?

How much work is done by pulling up on a suitcase at 40.0 elevation with a force of 5.00lb while moving it horizontally 1320.ft?

An object slides down at the top of a hill starting from rest it takes 8 seconds to slide down 100 meters at an angle of 60. Then what will be the coefficient of kinetic friction?