A1.50-kg ball and a 2.00-kg ball are glued together with the lighter one below the heavier one. the upper ball is attached to a vertical ideal spring of force constant and the system is vibrating vertically with amplitude 15.0 cm. the glue connect- ing the balls is old and weak, and it suddenly comes loose when the balls are at the lowest position in their motion. (a) why is the glue more likely to fail at the lowest point than at any other point in the motion? (b) find the amplitude and frequency of the vibrations after the lower ball has come loose.

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.

Asher cycles 12 miles in 16 hours. what is his speed?

What is a good example of instantaneous speed