1) The model airplanc has a mass of 3 kg, and is flying horizontally at a constant speed of 21 m/s at a radius of 2.7 m.
a) What tension is in the string?
b) If the plane's mass is doubled, what happens to the tension is part a?
c) If the plane's speed is doubled, what happens to the tension is part a?
d) If the string's length is doubled, what happens to the tension is part a?

Debris produced by mining is called

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.

Hat is the most commonly cited cause of occupational injuries in the healthcare sector? a. repositioning of patients b. manual pipetting c. slips and trips d. workplace violence