Other Physics Answers

A boy and girl jump off the edge of the pool. They jumped at the same speed and time, but the boy jumps mostly forward. What happened to the motion of the children after they leave the edge of the pool?

Given the altitude and the zenith distance of a star as 50 degree 25minutes and 39 degree 35minutes respectfully calculate for the declination and latitude of the star

A box of mass 40kg is being dropped along the floor by a rope inclined 60degree to the horizontal.The frictional force between the box and the floor is 100N and the tension of the rope is 300N. How much work in dragging the box through a distance of 4m

A badminton shuttle is struck, giving it a horizontal velocity of 73

m/s [W]. Air resistance causes a constant acceleration of 18 m/s2

[E]. Determine its velocity after 1.6 s.

The angular velocity of a wheel rotating on a horizontal axle point west. In what direction is the linear velocity of a point on the top of the wheel? If the angular acceleration points east, describe the tangential linear acceleration of this point at the top of the wheel. Is the angular speed increasing or decreasing?

A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100k.(take x=0.000018-1)

 Let the angle be the angle that the vector makes with

the measured counterclockwise from that axis. Find

the angle for a vector that has the following components: 

(a)Ax=2.50m, Ay=-0.500m

Electrophoresis is a medical therapy technique used to deliver medicaments into the patients body with help of an electric current. During the procedure, two oppositely charged plates are applied to the body providing flow of the current through the tissue. Suppose that current used in first five procedures was 7 mA (duration of the procedure 6 min) and during the last fifteen procedures 14 mA (duration 15 min). Find charge that passes through the body during 20 electrophoresis procedures.

A cylinder of mass m and radius R has a moment of inertia of 12mr2. The cylinder is released from rest at a height h on an inclined plane, and rolls down the plane without slipping. What is the velocity of the cylinder when it reaches the bottom of the incline?

A 9 microcoulomb test charge moves along +x-axis at a speed of 300,000 m/s in the region of 0.75 T magnetic field. Determine the magnetic force on the charge if (a) the field is out of the page; (b) the field is into the page; (c) the field is

downward; (d) the field is upward; (e) the field is 30° above horizontal.