While you are asleep, your body needs to get rid of about 64 J of waste heat every second. The body does this by transferring the heat from the Interior of your body (temperature 37°C) to the skin (temperature 30°C), where it is radiated away. By how much does this heat transfer change the body's entropy each second?
AS 1.4 J/K
AS -4.8 x 10-3)/K
AS-64 J/K
AS-15 J/K

Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

How many neutrons does plutonium -196 with an atomic number of 78.