Sunday
May 26, 2013

# Posts by Bobby

Total # Posts: 519

There is 10 blue bikes 6 green bikes and 2 yellow bikes

Organic Chemsitry
By knowing the natural abundance of minor isotopes, it's possible to calculate the relative heights of M+ and M+1 peaks. If natural abundances are 12C - 98.9% and 13C - 1.10%, what are the relative heights, to the nearest 0.1%, of the M+ and M+1 peaks in the mass spectrum ...

chemistry
Use the balanced equation to find the moles of H2 produced, then use its molar mass to find the mass of the H2.

PHYSICS
A hockey player makes a slap shot, exerting a constant force of 27.3 N on the hockey puck for 0.18 s. What is the magnitude of the impulse given to the puck?

Physics
but how do you go from 105*1.7 = 2.8*60 + 45 v to the answer?? i'm so confused!

Physics
A 45 kg cart is moving across a frictionless floor at 1.7 m/s. A 60 kg boy, riding in the cart, jumps off the cart so that he hits the floor moving forwards in the initial direction of the cart's motion with a velocity of 2.8 m/s. What is the velocity of the cart after the...

Physics Needy Help
A tank of water has been outdoors in cold weather, and a slab of ice 5.8 cm thick has formed on its surface (Fig. 18-46). The air above the ice is at -14°C. Calculate the rate of formation of ice (in centimeters per hour) on the ice slab. Take the thermal conductivity of i...

Physics
A tank of water has been outdoors in cold weather, and a slab of ice 5.8 cm thick has formed on its surface (Fig. 18-46). The air above the ice is at -14°C. Calculate the rate of formation of ice (in centimeters per hour) on the ice slab. Take the thermal conductivity of i...

Math
Trying to understand an inverse trig function. Evaluate Cos^-1 (sqr3/2) So I know it's 30 degrees, but wouldn't it also be 150 degrees because the Arc-cos is defined in the 2nd quadrant?

calculus
If f(x) is odd and the integral from -3 to 7 of f(x) dx is 11, then the integral from 3 to 7 of f(x) dx is __

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