Physics, 01.07.2019 17:10 babydani11
Amodel rocket is launched straight upward with an initial speed of 57.0 m/s. it accelerates with a constant upward acceleration of 3.00 m/s2 until its engines stop at an altitude of 140 m. (a) what can you say about the motion of the rocket after its engines stop? this answer has not been graded yet. (b) what is the maximum height reached by the rocket? m (c) how long after liftoff does the rocket reach its maximum height? s (d) how long is the rocket in the air? s
Answers: 3
Physics, 21.06.2019 20:30
Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?
Answers: 1
Physics, 22.06.2019 15:50
Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air
Answers: 3
Physics, 22.06.2019 17:40
The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.
Answers: 3
Physics, 22.06.2019 21:00
On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?
Answers: 3
Amodel rocket is launched straight upward with an initial speed of 57.0 m/s. it accelerates with a c...
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