An elevator in an office building completed the following trips: • 1st floor to Sth floor
• Sth floor to 4th floor
• 4th floor to 13th floor
The distance between each floor of the office building is 3.0m.
Which table shows the total distance traveled and displacement of the elevator?
B.
Distance Displacement
33 m 60 m
Distance Displacement
60 m 36 m
C.
D.
Distance Displacement
36 m
Distance Displacement
60 m
60 m
60 m

Protons and neutrons are found within the nucleus of an atom

We want to calculate the total metabolic heat generated by a singing canary taking into account heat transfer by radiation, convection and exhaling air. the air temperature is 20 oc, canary’s body internal and surface temperature is 33oc, external body surface convective heat transfer coefficient is 25.2 w/m2 .k, temperature difference between the inhaled and exhaled air is 4.3 oc, the ventilation rate is 0.74 cc of air per second, specific heat of air is 1.0066 kj/kg.k and density of air is 1.16 kg/m3 . assume the canary’s body to be a cylinder with 7 cm diameter and 9 cm length, and heat exchange is from the side as well as the top and bottom of cylinder. calculate 1) the net rate of heat lost by radiation, assuming heat gained by the bird through radiation from the surroundings is 11.5 w; 2) rate of heat transferred by convection to the surrounding air; 3) rate of heat transferred in the exhaling air without considering any internal evaporation; 4) total metabolic power.

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n