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Steel train rails are laid in 12.0-m-long segments placed end to end. The rails are laid on a winter day when their temperature is 1.8°C.
(a) How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 32.2°C?
(b) If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is 32.2°C?
A pipe with a 2m diameter carries water having a velocity of 4 m/s. What is the mass flow rate of the water in kg/s at the following temperatures.
After a shipwreck, a solid steel spoon lies at the bottom of the ocean, 5.45km below the surface, What's the water pressure at that depth
The area of the opening can be calculated from pi (3.1416) times the radius squared. If your pupil is open to a radius of 3.5 mm, explain how much light energy passes through in one minute? Give your answer in mJ.
Mike is a 70 kg pole-vaulter. He falls froma peak height of 5.9 m after pole vaulting over a crossbar set at that height. He lands on a thick mat. What average force was exerted by the mat on Mike during this impact
A resistor draws 12mW when placed acriss the terminals of a 1.5V battery, Determine the current drawn by the resistor
The speed of light in a transparent medium (such as glass) is less than the speed of light in a vacuum. Is this a violation of the theory of relativity.
A storage tank contains 21.6 kg of nitrogen (N_2) at an absolute pressure of 3.54 atm. What will the pressure be if the nitrogen is replaced by an equal mass of CO_2 ?
A rocket rises vertically, from rest, with an acceleration of 4.0m/s2 until it runs out of fuel at an altitude of 1400m. After this point, What maximum altitude does the rocket reach
A water molecule floating in the air loses one electron, becoming an ion, What is the magnitude of the electric force between the electron and the water ion
A metal rod (2.4 kg, 1.5 m long) is rotating about an axis through its center at 20.0 rad/s. Calculate its rotational kinetic energy
What is tension in each string
A microphone is attached to a spring that is suspended from the ceiling. Directly below on the floor is a stationary 412-hertz source of sound. determine the amplitude of the simple harmonic motion.
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