A 5kg block of iron is heated to 800degree C. it is placed in a tub containing 2litre of water at 15degree C. Assuming all the water is brought to the boil rapidly calculate the mass of water which boile off.

If 20 beats are produced within one second, which of the following frequencies could possibly be held by two sound waves traveling through a medium along a common path at the same time? A. 38 Hz and 63 Hz B. 22 Hz and 42 Hz C. 47 Hz and 55 Hz D.

A grasshopper can jump a maximum horizontal distance of 40cm. If it spends negligible time on the ground then in this case its speed along horizontal road will be

How is an inflated balloon affected by cold air

Several glands add fluids to the sperm to form semen as it passes through the vas deferens. true or false?

A 34-kg child on an 18-kg swing set swings back and forth through small angles. If the length of the very light supporting cables for the swing is 4.

You have a horizontal grindstone (a disk) that is 85 kg, has a 0.31 m radius, is turning at 88 rpm (in the positive direction), and you press a steel axe against the edge with a force of 21 N in the radial direction.

Which equation is most likely used to determine the acceleration from a velocity vs. time graph?

Applied force is the force of support exerted by an object that holds up another object. True False

Calculate the gravitational force on the washers using the formula F = ma where a = 10 m/s2 and m is the mass of the washers. Use the mass of the washers in kilograms. Record your calculations, to no more than three decimal places, in Table D.

Why does it take 10 times more energy to grow a kilogram of beef than a kilogram of wheat?