Janiya discovers an exoplanet orbiting a nearby star (Mstar = 1.8 Msun). She measures the orbital period of the exoplanet's orbit to be 9 years. What is the average distance (in astronomical units) between the exoplanet and the star?

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 steel is more dense that lake water, why can a boat float

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block