According to Hooke's Law, the force required to hold the spring stretched x m beyond its natural length is given by f(x) = kx, where k is the spring constant. Suppose that 5.4 J of work is needed to stretch a spring from 14 cm to 20 cm and another 9 J is needed to stretch it from 20 cm to 26 cm. Find the exact value of k, in N/m. k= N/m What is the natural length of the spring, in cm? cm

Determine the tension, T, in Newtons, in the string, where v= 7 m/s, r= 74 cm, m = 8 kg and | m = 33⁰

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70 Energy (Joule) ☎ 8 8 8 8 8 8 50 30 10 o S2FRT820 $2FRT730 AS2FRT650 S2HT940 o $2HT1150 0 -200 -150 S2FRT820 O -100 + S2HT940 A -50 0 Temperature (°C) O O S2FRT730 ... S2FRT650 $2HT1150 50 100 The figure shown corresponds to the absorbed energy of different ferritic steels in a temperature range of 1. What is the ductile-brittle transition temperature of S2FRT730 steel? 2. If a component will work at -50°C, what materials (from those shown) would you use to manufacture it? EXPLAIN YOUR ANSWER.

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A century-old platter falls vertically downward. Upon breaking, its fragments fly off parallel to the ground with velocity 1= 2.2 m/s and V2 = 15 m/s. Find mass ml and mass m2 in kg Vi 25.0° m2 45.0° m3 = 1.30 kg 3.07 m/s Select one *a. ml = 13551; m2 = 0.7180 Ob. ml = 1.3551; m2 = 1.1966 O. ml= 1.1966; m2 = 1.3651 Od ml =0.68; m2 = 0.96

A closed thermodynamic system consists of a fixed amount of substance (i.e. mass) in which no substance can flow across the boundary, but energy can. For a closed themodynamic system we cannot add energy to the system, via substance (E ) (1.e. matter which contains energy is not allowed across the boundary) Across the Boundaries E° = No Q = = Yes W mass NO CLOSED = Yes SY STEM m = constant | energy YES Figure 1.1. If the substance inside the thermodynamic system shown in figure 1.1. (i.e. piston cylinder device) is air, is the system a Fixed closed system Moveable closed system A. В.

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Thermodynamics. Help me to answer this question  By referring to the thermodynamics tables, calculate the missing properties in the following table and determine the phase for each subtance.

The acceleration due to gravity at sea level is g = 32.2 ft/s2 and is decreased 0.003 ft/s2 per 1000 ft of elevation. Find the height (km) above sea level for which the weight of a man is decreased by 7.5%? %3D