Classical Mechanics Answers

According to Yukawa theory of Nuclear forces, the attractive force between two Nucleons has the potential V(r)=Ke^-ar/r What will be the Nuclear force?

A man is marooned at rest on level frictionless ice. In desperation, he hurls his shoe to the right at 4.1m/s. If the man weighs 385 N and the shoe weighs 2.1N, the man moves to the left with a speed of...

That the human heart works as a powerful and highly effective pump, as every day it receives and discharges about 7500 liters of blood, suppose that the work done (work) before is equal to the work to raise this increase of blood a height equal to its height, m ​​1.65, if you know that the density of blood is kg / m 3 1060 and acceleration m / s 9.8 Calculate the power of the heart in watts (W)

A can is dropped from rest at a height of 40.0 m above ground. How much time does it spend in the bottom half of its fall?

1. 0.873 s
2. 0.783 s
3. 0.837 s
4. 0.738 s

Assuming that 80% of the Mars surface is covered with water at an average

depth of 3.5 miles and the radius of the earth is given by 5.97x106 meter,

estimate the mass of the water on the Mars in kilogram.

A V-canyon supports a 100-ft high, constant-angle (120°) arch dam. If the canyon is 60 ft wide at the top and the design freeboard is 6 ft (ie., the water level is 6 ft below the top of the dam), determine the abutment reactions at dam heights of 25, 50, and 75 ft above the bottom of the canyon.

How to calculate the horizontal and vertical components of a 350 air Force pushing downwards and an angle of 55 degrees to the vertical

 On its maiden voyage in July 1952, the liner United States won the coveted Blue Ribbon for the fastest crossing of the Atlantic from New York to Cornwall, U.K. The trip took 3 days 10 hours 40 min at an average speed of 34.5 knots (65.5 km/h). This was 10 h 2 min less than the 14-year-old record held by the Queen Mary. What was the average speed of the Queen Mary

A flow of 834 cfs is conveyed in a 10-ft-wide rectangular channel at a depth of 6.0 ft. What is the specific energy of the channel? Is this flow subcritical or supercritical? If n = 0.014, what channel slope must be provided to produce a uniform flow at this depth? Check your solution using appropriate computer software.

1.A trapezoidal channel with an 18-ft-wide bottom and side slope m = 2 discharges 300 cfs. The natural channel (clean/straight) has a 0.04 ft/ft bottom slope. Compute the normal depth of flow using successive substitution and Figure 6.4. Check your solution using appropriate computer software. 

2.A corrugated metal stormwater drain is discharging 55 cfs. Assuming uniform flow in the 4-ft-diameter pipe, determine the flow depth if the 150 ft long pipe goes through a 3-ft drop in elevation. Check your solution using Figure 6.4b and appropriate computer software.