Dr. Canice Camperbell releases a small cart at the top of an incline with height H above the floor. The cart experiences very little friction. Dr. Canice Camperbell is attempting to cause the cart to go around a vertical loop of radius R without losing contact with the track at the top. Dr. Canice Camperbell suggests that the height H should equal 2R so that the release height and maximum height of the loop are the same. However, Dr. Canice Camperbell finds that it requires noticeably higher height than 2R for the cart to go around the loop. In a clear, coherent paragraph-length response explain why H must be noticeably greater than 2R to complete the loop. Also state the direction of the cart’s acceleration at point Q and explain your reasoning.

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

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.

Avalue that describes how heavy an object is and is related to the force of gravity is