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1. A 2-cm-diameter sphere moves at Re ¼ 10 (separation is just occurring). What is its speed if it is submerged in (a) water at 10-C, (b) air at 40-C and 400 kPa, and (c) water at 90-C. 2. Water at 10-C flows by a 2-mm-diameter wire with a speed of 2 m=s. Sketch the expected flow showing the separated region, the wake, the boundary layer, and the free stream, should any of these exist.
The refractive indices of materials A and B have a ratio of nA/nB = 1.79. The speed of light in material A is 1.07 x 10^8 m/s. What is the speed of light in material B
Calculate the location of the center of mass of the earth-moon system (that is, find the distance of the center of mass from the earth's center)
an object of mass 39 kg is observed to accelerate with an acceleration of 2.0 m/s^2. If friction is so mall that it can be ignored, what is the force applied to the object in newtons
A weight of 200 N is hung from a spring with a spring constant of 2500 N/m and lowered slowly. How much will the spring stretch
a spherical ballon with radius 1.0m consists of an aluminum coated mylar. how many electrons must be deposited on the
Estimate the force on a 145-gram baseball if it hits the bat at 50 miles per hour and stays in contact with the bat for 0.1 second
An asteroid in an elliptical orbit about the sun travels at 1.0*106 m/s at perihelion(the point of closest approach) at a distance of 3.9*108 km from the sun. Howfast is it traveling at aphelion (the most distant point), whichis 8.8*108 km from the s..
A body is suspended vertically from an ideal spring of spring constant 3.1 N/m. The spring is initially in its relaxed position. What is the maximum kinetic energy of the body
Three resistors are connected in series across a battery, What is the greatest voltage that the battery can have without one of the resistors burning up, How much power does the battery deliver to the circuit
Find out the magnitude of the friction force acting on the case. Laser light with a wavelength = 680 illuminates a pair of slits at normal incidence. What slit separation would produce first-order maxima at angles of 40 from the incident direction.
A 9410-kg car is travelling at 28.7 m/s when the driver decides to exit the freeway by going up a ramp. What is the magnitude of the average drag force exerted
a taut rope has a mass of 0.170 kg and a length of 3.55 m. what power must be supplied to the rope to generate
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