If 0.20 kg of iron at 100 c is added to 1.00 kg of water at 20.0 c what is the final temperature of the system

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

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around

What is the speed vfinal of the electron when it is 10.0 cm from charge 1?