A brass rod is 185 cm long and 1.6 cm in diameter. What force in kN must be applien of the rod to prevent it from contraction when it is cooled from 120 °C to 20 °C? (E D: a-2.0 ×10°C)
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- A 150mm x 150mm square metal plate, 10mm thick, is hinged about a horizontal edge. If a 10mm diameter horizontal jet of water impinging 50mm below the hinge keeps the plate inclined at 30 degrees to the vertical, find the velocity of the jet. Take the specific weight of the metal as 75kN/m^3.A valve plate can rotate about an horizontal axis through A as shown. The area of the plate is 9"×9" square shape. Given the location of the axis A is 4.25''. Determine the depth of water, d, for which the valve will open. The specific weight of water is gamma =62.4 pcf8.) The section of a gate at the end of a tank is shown below. The length of the gate is 3 m normal to the paper and hinge at O. If the depth of water is 2.50 m, neglecting the weight of the gate calculate the horizontal component of the hinge reaction at O. Use unit weight of water 9.80 kN/m^3. fluid mechanics
- The spring is unstretched when x = 0. If the body moves from the initial position x1 = 70 mm to the final position x2 = 230 mm, (a) determine the work done by the spring on the body and (b) determine the work done on the body by its weight.Please answer. Thank you A 100- m steel tape is used to measure the distance of the line and found to be 1539.28 m long. During measurement, the tape is supported the ends under a pull of 10 kg and the observed mean temperature is 31 deg. celsius. The tape is of standard temperature of 20 deg. celsius and a tension of 12 kg. The cross sectional area of the tape is 0.035 sq. cm. The coefficient of linear expansion is 0.0000116/ deg. celsius and the modulus of elasticity of steel is 2.0 x 106kg/ sq. cm. The tape weighs 1.5kg. a) Determine the total correction for temperature. b) Determine the total correction due to sag. c) What is the correct length of the line?to measure a base line, a steel tape 30m long standardised at 15 degree Celsius with a pull of 100N was used. Find the correction per tape length, if the temperature at the time of measurement was 20 degree Celsius and the pull exerted was 160N weight of 1cm3 of steel is 0.0786N and weight of the tape=8N, E=210000kg/m2, coefficient of expansion of tape per 1 degree celsius is 0.00000071.
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- The ends of a 0.25kg rod AB are constrained to move along slots cut in a vertical plate as shown. A spring of constant k=3N/m. is attached to end A in such a way that its tension is zero when θ=0°. the rod is released from rest when θ=45° (position 1) until it reaches θ=0° (position 2). (L = 25 m) Determine the velocity at point b.Determine the pressure at A in bar gage due to the deflection of the mercury (sp. gr. = 13.6) in the U-tube gage shown in the figure. Round off your answer to to decimal places.A 5-kg uniform serving table is supported on each side by two pairs of identical links, AB and CD, and springs CE. If the bowl has a mass of 1 kg and is in equilibrium when θ = 45°, determine the stiffness k of each spring. The springs are unstretched when θ = 90°. Neglect the mass of the links.