Technician a says on a correctly operating gas accumulator, precharge pressure should be checked during a 500-hour preventative maintenance inspection. technician b says it is safe to perform repairs on a hydraulic system if the system contains an accumulator that is charged full of oil. who is correct?

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative