Soil for planting strawberries should _____
A) have a pH range of 6.5-7.0
B) be prepared 1 to 2 years before planting date
C) be low in magnesium
D) none of the above
B
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____ is the major force in moving soil from one place to another
A) Water B) Air C) Insects D) Animals
The Department of Energy's ____ Laboratory has developed maps showing the amount of solar exposure throughout the US, which can be used to determine the amount of energy you can expect to generate in any part of the country.
A. Solar Resource B. National Renewable Energy C. National Solar Mapping D. Solar Energy
The cantilevered beam shown in the accompanying figure is used to support a load acting on a balcony. The deflection of the centerline of the beam is given by the following equation
where
y = deflection at a given x location (m)
w = distributed load (N/m)
E = modulus of elasticity (N/m^2)
I = second moment of area (m^4)
x = distance from the support as shown (x)
L = length of the beam (m)
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14.12 The cantilevered beam shown in the accompanying figure is used to support a
load acting on a balcony. The deflection of the centerline of the beam is given by
the following equation
( 4 6 )
24
2 2
2
x Lx L
EI
wx
y ? ?
?
?
where
y = deflection at a given x location (m)
w = distributed load (N/m)
E = modulus of elasticity (N/m2)
I = second moment of area (m4)
x = distance from the support as shown (x)
L = length of the beam (m)
Using Excel, plot the deflection of a beam whose length is 5 m with the modulus of elasticity of E 200 GPa and I = 99.1 x 106 mm^4. The beam is designed to carry a load of 10,000 N/m. What is the maximum deflection of the beam?
Heat-shrink insulators are intended to provide _____.
a. strain relief and mechanical protection b. suitability for cold weather duty c. rating for duty at increased voltages d. additional crimping force on the terminal