How did early chemists like Mendeleev classify the elements?

A rollercoaster speeds up from rest to (45m/s) in 1.2s (37.5 m/s²). The roller coaster car then travels vertically upwards and decelerates at 10m/s² How much time passes before it is stationary (for a moment) ?

When a person has a shower, the heated mirror does not become misty but stays clear

A large truck loaded with scrap Stella weights 14 metric tons and is traveling north on the interstate heading for Chicago. It has been averaging 48km/h for the journey and has traveled over the 1450 km so far. It has just stopped to refuel.

Since 40 percent of industrial water use is non-consumptive, there is little that industry can do to conserve even more water. True False

A girl lifts a 160 N load a height of 1 m in a time o. 5. what is power does the girl produce

Which is a characteristic of an electromagnetic wave?

What does the ozone layer absorb? a. Microwaves c. UV radiation b. X-rays d. Infra-red radiation

An object is undergoing shm with period 0.900 s and amplitude 0.320 m. at t = 0 the object is at x = 0.320 m and is instantaneously at rest. calculate the time it takes the object to go (a) from x = 0.320 m to x = 0.160 m and (b) from x = 0.

Your friend states in a report that the average time required to circle a 1.0-mi track was 49.325 s. This was measured by timing 10 laps using a stopwatch with a precision of 0.01 s. Do you believe his results are reliable? Explain.

The forklift exerts a 300.0 N force on the box and moves it 15.0 m into the air. How much work does the forklift do? A. 500 J B. 1.50 * 10^3 J C. 4.50 * 10^3 J D. 0.00 J