Pls help me A man standing 100 m in front of a wall claps his hand. Calculate the time
between the clap and hearing the echo of the clap. Given that the speed
of sound in air is 330m/s. Show your working in the space below.

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)