During level airplane flight

During level airplane flight at a constant velocity, the pressure created by air flowing over the curved upper surface of the wing compared to the pressure created by air flowing along the flat underside of the wing is a. less b. insufficent data c.the same d. more

a spherical-shaped hollow

a spherical-shaped hollow steel shell, with a radius of 2.5m, containing some instruments, is lowered by a cable into a lake. The shell with its contents weighs 7.2 * 10^5 N on the deck of the ship from which it is being lowered. What is the tension in the cable when the sphere is completely immersed in water? a. 1.8 kg b. 2 ...continues

an angular acceleration

an angular acceleration of 1200rev/min^2 when expressed in radians/s^2 is a.0.20 rad/s^2 b. 2.1 rad/s^2 c. 20 rad/s^2 d. 1.2 rad/s^2

Find the torque, assuming it to be a constant

a disk with a mass of 50kg and radius .40m is rotated about its axis by a motor. The flywheel starts from rest amd rotates at 129 rev/min in 10 seconds. Find the torque, assuming it to be a constant. a. 1.5 N m b. 3.0 N m c. 2.0 N m d. 5.0 N m

find the rate of rotation

a star rotates about its axis through a diameter once in 50 days. At the end of its life, the star collapses to one-hundreth of its original diameter. The rate of rotation of the collapsed star will be: a. 0.02 rotaions per day b. 20 rotaions per day c. 2 rotaions per day d. 200 roations per day

moments of inertia; incline

if a solid cylinder, a hoop and a solid sphere of the same mass are rololed down simultaneously from the same height on an inclined plane, in which order will the objects reach the bottom of the incline? a. cylinder, hoop, sphere b.cylinder, sphere, hoop c. sphere, cylinder, hoop d. hoop, cylinder, sphere

Rotatinal inertia of the cylinder about the parallel axis is...

A solid cylinder of mass 8kg and diameter 20cm is rotated about an axis parallel to its central axis at a distance of 10 cm from the cylinder. the rotatinal inertia of the cylinder about the parallel axis is: a. 0.12 kg m^2 b. 0.08 kg m^2 c. 12 kg m^2 d. 0.04 kg m^2

find the height at which the tank is located...

water is pumped through a pipe to a tank at the top of a building. The pressure of the water at ground level is 2.2* 10^5 Pa and at the tank, the pressure is atmospheric. If the diameter of the pipe is the same throughout, find the height at which the tank is located. Atmospheric pressure may be assumed as 1.0 * 10^5 Pa and G as ...continues

find the impulse of the force on the baseball ...

a 300 g baseball traveling at 30m/s is struck by a bat in the direction from which it came at 40 m/s. find the impulse of the force on the baseball. a. 21Ns b. 18Ns c. 12Ns d. 4.5Ns

Find the kinetic energy of the sphere...

a uniform solid sphere of mass 5kg and radius 30cm is rotating about an axis through its center at the rate of 180 rev/min. Find the kinetic energy of the sphere. The rotational inertia of a uniform sphere is 2/5 MR^2. a.64j b. 24j c. 16j d. 32j