Physics, 06.02.2020 01:48 kloeydrea08
Aphysics teacher performing an outdoor demonstration suddenly falls from rest off a high cliff and simultaneously shouts "." when she has fallen for 3.0 s, she hears the echo of her shout from the valley floor below. the speed of sound is 340 m/s. (a) how tall is the cliff? (b) if we ignore air resistance, how fast will she be moving just before she hits the ground? (her actual speed will be less than this, due to air resistance.)
Answers: 3
Physics, 22.06.2019 12:20
A2.0 μf capacitor and a 4.0 μf capacitor are connected in series across a 0.827-kv potential. the charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. find the voltage across each capacitor.
Answers: 2
Physics, 22.06.2019 12:30
Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.
Answers: 1
Physics, 22.06.2019 17:10
As the distance from a magnet increases, what happens to the magnet force?
Answers: 1
Aphysics teacher performing an outdoor demonstration suddenly falls from rest off a high cliff and s...
Physics, 31.12.2019 02:31
Physics, 31.12.2019 02:31
Physics, 31.12.2019 02:31
Mathematics, 31.12.2019 02:31
Mathematics, 31.12.2019 02:31
History, 31.12.2019 02:31