Could a mixture be made only element and no compounds

When an apple is cut, it often turns brown. What does the color change indicate? A. physical change only B. chemical change only C. physical and chemical changes

A 70kh man jumping from a window lands in an elevated firerescue net 11.0 m below the window. He momentarily stops when hehas stretched the net by 1.50 m.

If the sun were to vanish instantly would earth immediately fly out of its orbit explain why or why not

Volcanism on Earth is always associated with plate tectonic activity.

The vernal equinox indicates the beginning of what season

All parts of the electromagnetic spectrum share travel at the same speed through empty space. True False

What is the mechanical advantage of the frictionless plane shown below? Inclined plane A. 0.64 B. 1.31 C. 1.4 D. 1.56

What does ice become when it absorbs enough heat energy. C. Frost. D. Liquid

Steam enters an adiabatic turbine steadily at 3 mpa and 400°c and leaves at 50 kpa and 100°c. if the power output of the turbine is 2 mw, determine (a) the isentropic efficiency of the turbine and (b) the mass flow rate of the steam flowing through

StA A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.