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Q. An electric wire that has a mass of 5.0kg for a 20 m length is strung between two poles 20 m apart. What must be the tension in the wire if it is to take .80 seconds for a pulse to travel along the wire from one pole to the other?
Q. A small projectile is fired vertically downward into a fluid medium with an initial velocity as it enters the fluid medium of 60 m/s and after travelling x = 1 m the velocity of the projectile is reduced to 2.4 m/s. With the assumption that due to the resistance of the fluid the projectile experiences a retarding force proportional to (velocity) 3 , thus the deceleration is defined by the relation a = -kv3 m/s', where v is in m/s. Determine:a) The value of k.b) The velocity of the projectile 5 s after it is fired.c) The position of the projectile 5 s after it is fired.
A charge of -3.0 nC is at the origin and a second charge of 13.0 nC is at x = 8.00 m. Find the magnitude and direction of the electric field halfway in between the two charges.
Four identical masses of mass 710 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of net gravitational force on one of the masses, due to the other three.
Consider the conical pendulum with an 80.0 kg bob on a 10.0 m wire making an angle of 5.00 with the vertical as shown. Determine (a) horizontal and vertical components of the force exerted by the wire on the pendulum and (b) radial acceleration of th..
Find the radius of the largest water drop
What travel time is required for the landing
A 2.10 sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward sound receiver as the heart beats. The reflected sound is then mixed with the transmitted soun..
What is mass of the ice cube
Travelling at the speed of 14.10 m/s, driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.650. What is the speed of automobile after 1.130 s have elapsed..
A truck travels beneath an airplane that is moving 190 km/h at an angle of 26? to the ground.
Find out the coefficient of static friction
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
How greatly time elapses before the compass hits the ground
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