Physics
Physics, 10.11.2020 21:00, xxaurorabluexx

Preliteracy skills help a child: Be ready to do math.
Be ready to sit and work in school.
Be able to listen effectively.
Be ready to learn to read.
Be ready for physical tasks, like jumping and skipping.

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Answers: 2

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Physics, 22.06.2019 00:30, Solany6426
Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).
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Physics, 22.06.2019 12:50, stephanie37766
Which changes would result in a decrease in the gravitational force btween two objects? check all that apply
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Physics, 22.06.2019 16:50, lizzepacheco
Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.
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Physics, 22.06.2019 20:00, yhhh
Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?
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Preliteracy skills help a child: Be ready to do math.
Be ready to sit and work in school.

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