Simplify 16 ÷ 2[8 – 3(4 – 2)] + 1.
The confusing part in the above calculation is how "16 divided by 2[2] + 1" (in the line marked with the double-star) becomes "16 divided by 4 + 1", instead of "8 times by 2 + 1". That's because, even though multiplication and division are at the same level...
Submission # Try Submitted Answer
1 Unable to interpret units. Computer reads units as "n*m".Help: Physical_Units 15.3 n*m
2 Unable to interpret units. Computer reads units as "n".Help: Physical_Units 15.3 n
3 Unable to interpret units. Computer reads units as "j*m".Help: Physical_Units 15.3...
Homework Statement
A grinding wheel is initially at rest. A constant external torque of 52.5 N· m is applied to the wheel for 18.4 s, giving the wheel an angular speed of 605 rev/min. The external torque is then removed, and the wheel comes to rest 101 s later. Find the moment of inertia of...
Homework Statement
Large limestone caverns have been formed by dripping water. If water droplets of 0.0305 mL fall from a height of 5.17 m at a rate of 14 droplets per minute, what is the average force exerted on the limestone floor by the droplets of water during a 1.00-min period? (Assume...
Homework Statement
Water flows through the pipe, as shown in the figure below and exits to the atmosphere at the right end of section C.
The diameter of the pipe is 2.04 cm at A, 1.02 cm at B, and 0.850 cm at C. The gauge pressure in the pipe at the center of section A is 1.25 atm and...
I figured it out. You have to convert L to m/s. First convert L to m^3, which is done simply by dividing by 1000. Then divide that by the cross section area (d/2)^2*pi to get the velocity. The rest is then done as before.
https://www.physicsforums.com/showthread.php?t=195437 - the thread that...
Homework Statement
Suppose Earth were a nonrotating uniform sphere. As a reward for earning the highest lab grade, your physics professor chooses your laboratory team to participate in a gravitational experiment at a deep mine on the equator. This mine has an elevator shaft going 11.8 km...
Homework Statement
An object is projected straight upward from the surface of Earth with an initial speed of 3.37 km/s. What is the maximum height it reaches?
Homework Equations
G = gravitational constant = 6.673x10^(-11) m^3 / (kg s^2)
M = mass of the Earth = 5.9742x10^24 kg
R =...