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An iron bar 50 cm long is raised to a copper bar 60 cm long and of the same diameter. The free end of the iron bar is kept at 0 oC while the free end of the copper bar is at 100 oC.
A) What is the temperature of the junction point?
B) What is the heat flow down the rod if its cross-sectional area is 2.50 cm2?
In a control system, an accelerometer consists of a 4.99-g object sliding on a calibrated horizontal rail, Find the force constant of the spring required for the calibration to be correct
The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between mass 1 and teh ramp is 0.25. Evaluate the change in kinetic energy of the 50 kg block as it moves from a to b, a distance of 20 m
The entire string is 2.00m long and has a mass of 400-g. The vibrating section of the string is 1.90m long. What tension is needed to tune this string properly.
What angle does the rope make with the horizontal.
If John Glenn weighed 640 N on Earth's surface, a) how much would he have weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from centre of Earth? b) Why is it said that an astronaut is never truly "weightles".
A damped mass-spring system oscillates at 280 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 8.4 cm and the energy of the oscillating system is then 84 J.
The Trans-Alaskan pipeline is 1,300 km long, How much does the steel pipeline expand due to the difference in temperature
The 15g head of a bobble-head doll oscillates in SHM at a frequency of 4.0Hz. What is the head's time constant
what is the magnitude of its velocity after the collision. A soccer player applies a force of 60.5 N to a soccer ball while kicking it. If the ball has a mass of 0.42kg, what is the acceleration of the soccer ball.
A particle travels 16 times around a 18-cm radius circle in 37 seconds. What is the average SPEED (in m/s) of the particle
Determine the coefficient of kinetic friction between the block & the table.
If, as is typical, each of them breathes about 500 {rm{ cm}}^3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year.
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