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A container has a circular hole d=5cm on the bottom and is sealed by a metal ball weighs W=2.452, with radius 4cm. Water is H=20cm deep. Calculate the minimum force F to lift the ball.
Mass of m1=300kg is placed in sea water with density rho =1025kg/m^3. On top of the cone is navigation light for boats. The mass is m2 =55kg. Calculate the height of height of cone dipped into sea w
Assume it is just sitting with air around it. A). How high can the water rise above the bottom of the tank before it will begin to float?
Check these statements for sea-level conditions. Calculate the effect of increasing the hot-air maximum temperature to 250 degrees Fahrenheit above ambient.
The initial temperature of the copper is 60oC and the final equilibrium temperature of the copper and the water is 21.24oC. Estimate the initial volume of the water used, in m3.
The sliding distance after the first 0.5 seconds g. if the plane of the cart is 3 m long, calculate the time when the block slides out of the edge h. Draw the a-t, v-t, and s-t diagrams.
Find out at what depth a concentration of 1.0% carbon would be present after this diffusion process? D for diffusion at this temperature in steel is 5.9 x 10 -12 m2/s.
If the diffusion coefficient for Al in steel is 7.2x10-9 cm2/sec at the hot dipping temperature, determine the time required to achieve the required concentration at the required location below the
Steel reinforcement rods had been pulled to a thickness below regulatory standards. What is the effect of this stretching on the microstructure and materials properties of the rebar?
Determine (a) the rate of shaft work transfer (in kW), (b) the electrical work transfer (in kJ) in 10 s, (c) the rate of heat transfer (in kW).
How to determine the COP of this system, given only that the first process is isobaric, the second is PV = constant, the final process is isochoric, and the pressure after the second process is 3 ba
The frictional driving force acting on the wheels of the 2.4-Mg van is F(d) = (600t^2) N, where t is in seconds. If the van has a speed of 20 km/hr when t=0s, determine its speed when t=5s.
A balloon in the upper atmosphere is filled with water vapor with a speci?c volume of 10 m3 /kg. a) If its volume is 25 m3, how many moles of water vapor are in the balloon?
On top of the water is 0.3 m of kerosene, which is open to the atmosphere. If the temperature is 20 C, what is the gage pressure at the bottom of the tank?
What is the gage pressure at this depth in fresh water, and what is the ratio of absolute pressure at this depth to normal atmospheric pressure? Assume Temp. = 20 C.
A gage on an oxygen tank reads a pressure of 300 kPa gage. What is the pressure in the tank in kPa abs? please show the work and include units.
The temperature outside is 0 C. If it is calm and the heat exchange coefficient is h = 5 W/m2· K, what is the rate of heat transfer in kJ/s from your hands?
Evaluate the coefficient of performance. Assume Cv for the gas is 3/2*R, where R is the ideal gas constant. Path 3->2 is isothermal and Path 4->3 is adiabatic.
What is the specific volume of this R-22 initially? b) What is the quality of this R-22 after the cooling? c) What is the internal energy U after the cooling?
If the rods are 1.5 inches in diameter and the allowable stress of the steel used is 80,000 psi, what is the safety factor of this design?
Determine the time constant of this thermocouple. If the gas temperature suddenly increases by 100 C, how long will it take the thermocouple to attain a temperature rise within 1% of the gas temper
The spring constant on car A is k= 3MN/m. Determine the maximum compression of the spring mounted on car A. neglect rolling resistance.
The top surface of the oil in the manometer is even with the water surface inside the tank. If the ambient pressure is 14.5 lbf/in2, what is the air pressure above the water surface in the tank? The
What is the ratio of the two weights? Assume that the earth is a perfect sphere with radius 'R' and that the spin axis is the geographical North-South axis.
The retarding force due to the fluid is proportional to the square of the velocity of the pendulum. Call the constant of proportionality k. Derive the equations of motion for the pendulum.