An evacuated tube uses an accelerating voltage of 21 kv to accelerate electrons to hit a copper plate and produce x-rays. how much voltage would be required to cause protons to reach the same speed an electron reaches? (we don't worry that the protons would be going in the opposite direction) group of answer choices

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

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)