Three people are standing on a horizontally rotating platform in an amusement park. one person is almost at the edge, the second one is (3/5)r from the center, and the third is (1/2)r from the center.

1-if the period of rotation of the first person is t1 = t, find in terms of tthe period of rotation of the second person.

2- if the period of rotation of the first person is t1 = t, find in terms of t the period of rotation of the third person.

3-if the speed of the first person is v1 = v find in terms of v the speed of the second person

4- if the speed of the first person is v1 = v find in terms of v the speed of the third person.

5- if the radial acceleration of the first person is a1 = a, find in terms of athe radial acceleration of the second person.

6- if the radial acceleration of the first person is a1 = a, find in terms of athe radial acceleration of the third person.

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.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?