While submerged in water, the rock has displaced (20.0 N - 12.5 N
=) 7.5 N
A diamond rod and a tungsten rod have the same length and diameter and are subjected to the same force. If the diamond rod stretches by 2.30 times 10^-6 m, by what amount will the tungsten rod stretch? Young's modulus for diamond = 1.22 times 10^12 N/m^2; for tungsten = 3.60 times 10^11 N/m^2. A spider of mass 7.0 times 10^-4 kg hangs from a 75.4-cm-long thread whose diameter is 2.0 times 10^-3 mm. Young's modulus of thread is 3....
A spider of mass 6.9 x 104 kg hangs from a 78.1-cm-long thread whose diameter is 2.0 x 10 mm. Young's modulus of thread is 3 x 10° N/m2. By how much does the thread stretch?
A copper rod (length = 2.5 m, radius = 1.60 10-3 m) hangs down from the ceiling. A 8.8-kg object is attached to the lower end of the rod. The rod acts as a "spring", and the object oscillates vertically with a small amplitude. Ignoring the rod's mass, find the frequency f of the simple harmonic motion. Hz
A sign (mass 2300 kg ) hangs from the end of a vertical steel girder with a cross-sectional area of 0.018 m2 . Ignore the mass of the girder itself. The elastic modulus for steel is 2.0×10^11N/m2. A.) What is the stress within the girder? B.)What is the strain on the girder? C.)If the girder is 9.40 m long, how much is it lengthened?
A sign (mass 2100 kg k g ) hangs from the end of a vertical steel girder with a cross-sectional area of 0.015 m2 m 2 . Ignore the mass of the girder itself. The elastic modulus for steel is 2.0×1011N/m2 2.0 × 10 11 N / m 2 . A. What is the stress within the girder? B. What is the strain on the girder? C. If the girder is 7.20 mm long, how much is it lengthened?
When a block of volume 1.27 times 10^-3 m^3 is hung from a spring scale as shown in Figure A. the scale reads 9.0 N. When the same block is then placed in an unknown liquid it floats with 2/3 of its volume submerged as suggested in Figure B. The density of water is 1.00 times 10^3 kg/m^3. Determine the mass of the block. Determine the density of the unknown liquid.
d-f Reasoning Problem 2. (28 pts) A uniform 35.0-kg aluminum platform of length 5.0 m is supported b two light cables, as shown below. An 7o.o-kg painter stands o.8 m from the left end of the scaffold, and his painting equipment is 1.o m from the right end. If the tension in the left cable is twice that in the right cable, find: d. the tensions in the cables (10 pts) e. the mass of the equipment.(10 pts) f. How...
1.(17 poins) The accelanation due to gravity on the surface of a planet is three times as large as it is on the surface of Earth The ass denaity of the planet is known to be twice that of Earth. What is the radius of this planet in terms of Earth 's radiu? 2 (16 points) In the figure, the output piston of hydraulice system is connected to the spring. Spring is between a wall and the output piston of...
Pre-discussion # 8- Fluid Dynamics & Heat & Thermodynamics NAME: 1. Water with density 1000 kg/m is flowing in a horizontal pipe with vi 10 m/s to the right. The radius of the pipe is 5.0 cm. The ratio of radius at point 1 to point 2 is ri/tr:-2, and ri equals to r. The flow is laminar. Ignore friction. (a) Find the flow rate at point 1, 2, and 3. 1v (b) Find vi at point 2. (c) Find...
7. A solid sphere of copper ( 8940 kg/m') with a radius of 5.0 cm has a mass of a) 45 9 kg b) 6.78 kg c) 25.7 kg d) 4.68 kg (10 pts) The pressure at the bottom of a 76-cm high column of mercury (p = 13,550 kg/m) is a) 0.010 kPa b) 101 kPa c) 10.1 kPa d) 0.101 kPa (10 pts) 9. Anaxial force of 20 kN acts on a 1.50-cm diameter rod. The axial stress...