Two cars have the same mass. One car travels at 30 mph and the other car travels at 40 mph. Which of these is true? Select one:

The faster car has more kinetic energy because kinetic energy increases with speed.

The slower car has more kinetic energy because kinetic energy decreases with speed.

The faster car has more kinetic energy because kinetic energy decreases with speed.

The slower car has more kinetic energy because kinetic energy increases with speed.

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.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

When does your body conduct current more readily?