A 6.0 cm diameter horizontal pipe gradually narrows to 4.0 cm.When water flows through this pipe at a certain rate, the gaugepressure in these two sections is 32.0 k Pa and 24.0 k Pa,respectively. What is the volume rate of flow?

Saturn has an equatorial radius of 6.00 107 mand a mass of 5.67 1026 kg.
(a) Compute the acceleration of gravity at the equatorof Saturn.
(b) What it the ratio of a person's weight on Saturn to that onEarth?

An airplane propeller is 2.08 m in length (from tip to tip) and has a mass of 117 kg. When the airpline's engine is first started, it applies a constant torque of ${\displaystyle 1950N\cdot m}$ to the propeller, which starts from rest.
a) What is the angular acceleration of the propeller? Model the propeller as a slender rod.
b) What is the propeller's angular speed after making 5.00 revolutions?
c) How much work is done by the engine during the first 5.00 revolutions?
e) What is the instantaneous power output of the motor at the instant that the propeller has turne through 5.00 revolutions?

A stunt man whose mass is 70 kg swings from the end ofa 4.0 m long rope along thearc of a vertical circle. Assuming that he starts from rest whenthe rope is horizontal, find the tensions in the rope that are required to make him follow his circular path at each of the following points.
(a) at the beginning of his motion N
(b) at a height of 1.5 m above the bottom of the circular arc N
(c) at the bottom of the arc N

When a car stops suddenly, the passengers tend to move forward relative to their seats. Why? When a car makes a sharp turn, the passengers tend to slide to one side of the car. Why?

Find the domain and range of these functions.
a) the function that assigns to each pair of positive integers the first integer of the pair.
b) the function that assigns to each positive integer its largest decimal digit.
c) the function that assigns to a bit string the number of ones minus the number of zeros in the string.
d) the function that assigns to each positive integer the largest integer not exceeding the square root of the integer.
e) the function that assigns to a bit string the longest string of ones in the string.

At a certain location, wind is blowing steadily at 10 m/s. Determine the mechanical energy of air per unit mass and the power generation potential of a wind turbine with 60-m-diameter blades at that location. Take the air density to be ${\displaystyle 1.25\frac{kg}{m^3}}$.

I need help with a few introductory physics prelab questions.
1) An object moves 15 meters in 3 seconds. What is its velocity (in m/s)?
2)What is the velocity (in cm/s) of an object which moves 44 m in 2 s?
3) The charge of an electron is ${\displaystyle -1.60\times {10}^{-19}}$ C. Determine the charge to mass ratio of the electron (in 1011 C/kg). (Hint: divide the electron's charge by its mass; the answer is a negative number with a positive exponent)
4) What is the average velocity (in kilometers per hour) of a cart that travels 100 km in 5 hours?