How are the Grand Canyon flood investigations similar to the stream-table investigations? How are they different?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

What do you think car designers do if the damage caused by a crash test is too severe?

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?