Uments It's time to make the ice pieces. For ice piece 1, place 2 teaspoons of water into one of the spaces in the
ice cube tray. To make ice piece 2, place 2 teaspoons of water into the sealable plastic bag. Carefully
squeeze as much of the air out of the bag as possible without spilling any water. Then seal the bag.
Place the sealed bag on a flat surface in the freezer. Place the ice cube tray in the freezer at the same
time. Leave both in the freezer for four hours. Record the start time and the time when you can remove
the ice.

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 occurs during a combustion reaction

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.