(4) 10 m/s 13. An object, travelling along a straight path, covers 35 m distance in 4 seconds. In next 6
seconds, it covers 50 m distance. What is the average speed of the object?
(1) 3.5 m/s
(2) 4.5 m/s
(3) 7.5 m/s
(4) 8.5 m/s
14. A taxi driver noted reading on the odometer fitted in

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)