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3 years ago

Identify each of these substances as acidic, basic, or neutral.

Physics

2 answers:

stira [4]3 years ago

8 0

yes,

neutral

acidic

basic

wlad13 [49]3 years ago

6 0

1) neutral
2) acidic
3)basic
4) basic

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~~~NEED HELP ASAP~~~ Please solve each section and show all work for each section.

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Let the x-axis be (+) towards the right and y-axis be (+) in the upward direction. We can write the net forces on mass $m_A$ as

$x:\:\:(F_{net})_x = f_N - T = -m_Aa\:\:\:\:\:\:\:(1)$

$y:\:\:(F_{net})_y = N - m_Ag = 0 \:\:\:\:\:\:\:\:\:(2)$

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$x:\:\:(F_{net})_x = T - m_B\sin30= -m_Ba\:\:\:\:\:\:\:(4)$

$y:\:\:(F_{net})_y = N - m_Bg\cos30 = 0 \:\:\:\:\:\:\:\:\:(5)$

From (5), we can solve for N as

$N = m_B\cos30 \:\:\:\:\:\:\:\:\:(6)$

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$T = m_A( \mu_kg + a)\:\:\:\:\:\:\:\:\:(7)$

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Collecting similar terms together, we get

$(m_A + m_B)a = m_Bg\sin30 - \mu_km_Ag$

$a = \left[ \dfrac{m_B\sin30 - \mu_km_A}{(m_A + m_B)} \right]g\:\:\:\:\:\:\:\:\:(8)$

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