Two pieces of clay, one white and one gray, are thrown through the air. The white clay has a momentum of 25\,\text{kg}\cdot\dfrac{\text{m}}{ \text{s}}25kg⋅ s
m

25, start text, k, g, end text, dot, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction, and the gray clay has a momentum of -30\,\text{kg}\cdot\dfrac{\text{m}} {\text{s}}−30kg⋅
s
m

minus, 30, start text, k, g, end text, dot, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction immediately before they collide.
What is the magnitude and direction of their final momentum immediately after the collision?
Your answer should have one significant figure.
\text{kg}\cdot\dfrac{\text{m}}{\tex t{s}}kg⋅
s
m

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)

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?