math
there are 45 children in a class.if there are 3 more girls than boys,how many are girls?
Statistics
The annual precipitation for one city is normally distributed with a mean of 72 inches and a standard deviation of 3.5 inches. In 95% of the years, the precipitation in this city is between___ and ___
chemistry
simply put, (0.75 C/s)(time)(1 mole e-/96485 C)(1 mole Cu/2 mole e-) = (0.10825-0.04175) time = 17,110.07 s = 4.7527 hr
chemistry
my answer is 4.7527 hr. it is solved by this format: time = [(0.10825-0.04175)/((0.75)(1/96485)(1/2))]/[3600] time = 4.7527 hr Note: for the dimensional analysis, (mol)/(C/s)(mol/C)=s (divide by 3600 to convert to 1 hr) hope it helps.
physics
I meant 3.86*10^-6 N
physics
A mass of 710 kg is located at the origin. A second mass, 44.0 kg, is located at the point (0.216,0.702) m. Find the magnitude of the gravitational force on the 44.0 kg mass due to the 710 kg mass at the origin. I got: 3.86×10-6 N Enter the x and y components of the grav...
physics
Please decide which of the following statements for car collisions are true or false. 1)Crumple zones on cars are parts of the front of the car that are designed to receive maximum deformation during a head-on collision. The essential safety benefit of crumple zones results fr...
physics
A bullet of mass m = 5.89 g is fired into a block of mass M = 3.09 kg that is initially at rest on the edge of a smooth table. (The table top is 0.83 m above the floor.) The bullet ends up stuck in the block, and together they fly off the table and fall to the floor. If the bu...
Physics
Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min, assuming the belt does not...
Physics?
ok..so for c: v = w*r = 168.2*0.343m =57.6926 and therefore for a: w = v/r = 57.6926/0.139m = 415.055 is that correct? and for the acceleration: for a: a= 5.7*0.139 = 0.7923 and for c: 0.7923/0.343 = 2.3099 but how do I get time ??
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