A cart of mass m moves to the right on a frictionless track at speed u. The cart collides and sticks to another cart moving to the left at speed up with mass 2m. Which of the following quantities are conserved during the collision?

- Kinetic Energy
- Momentum
- Both Momentum and Kinetic Energy
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The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Atomic nuclei of almost all elements consist of