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4 years ago

5

The picture below shows a soil texture triangle.

1 answer:

lys-0071 [83]4 years ago

4 0

Referring to the given diagram, we will find that the percentage of sand in silt is given on the base of the triangle.
The amount of sand is almost 50% of silt. Representing this on the percentage line, we will find that the percentage of sand is somewhere between the 40% and the 60%.

Based on the above, the best choice would be:
c. 40 percent to 60 percent

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As a 2.0-kg object moves from (4.4 i + 5j) m to ( 11.6 i - 2j) m, the constant resultant force

aliina [53]

Answer:

v_f = 10.38 m / s

Explanation:

For this exercise we can use the relationship between work and kinetic energy

W = ΔK

note that the two quantities are scalars

Work is defined by the relation

W = F. Δx

the bold are vectors. The displacement is

Δx = r_f -r₀

Δx = (11.6 i - 2j) - (4.4 i + 5j)

Δx = (7.2 i - 7 j) m

W = (4 i - 9j). (7.2 i - 7 j)

remember that the dot product

i.i = j.j = 1

i.j = 0

W = 4 7.2 + 9 7

W = 91.8 J

the initial kinetic energy is

Ko = ½ m vo²

Ko = ½ 2.0 4.0²

Ko = 16 J

we substitute in the initial equation

W = K_f - K₀

K_f = W + K₀

½ m v_f² = W + K₀

v_f² = 2 / m (W + K₀)

v_f² = 2/2 (91.8 + 16)

v_f = √107.8

v_f = 10.38 m / s

3 0

3 years ago

A tall cylinder with a cross-sectional area 12.0 cm² is partially filled with mercury; the surface of the mercury is 5.00 cm abo

JulijaS [17]

Answer:

$V = 816 cm^3$

Explanation:

As we know that gauge pressure of the fluid at the bottom of the cylinder is given as

$P = \rho g h$

now we know that pressure at the bottom is double when water is poured on the mercury

So we have

$\rho_{hg} g h_1 = \rho_w g h_2$

so we will have

$13.6 \times 5 = 1 \times h$

so we have

$h = 68 cm$

now the volume of the water added to it is given as

$V = h A$

$V = (68 cm)(12 cm^2)$

$V = 816 cm^3$

6 0

4 years ago

PLEASEEEEEE HELPPPPPPP<br><br> Define resistance and discuss how it affects current.

PIT_PIT [208]

Answer:

Resistance is the opposing of the flow of current through a conductor.

7 0

3 years ago

Classify the following as either a specific or a nonspecific defense of the body's immune system.

choli [55]

Skin is specific

Macrophages specific

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3 0

3 years ago

Medical cyclotrons need efficient sources of protons to inject into their center. In one kind of ion source, hydrogen atoms (i.e

antoniya [11.8K]

Answer:

$r=5.278\times 10^{-4}\ m$

Explanation:

Given that:

magnetic field intensity, $B=0.07\ T$

kinetic energy of electron, $KE=1.2\ eV= 1.2\times 1.6\times 10^{-19}\ J= 1.92\times 10^{-19}\ J$

we have mass of electron, $m=9.1\times 10^{-31}\ kg$

<em>Now, form the mathematical expression of Kinetic Energy:</em>

$KE= \frac{1}{2} m.v^2$

$1.92\times 10^{-19}=0.5\times 9.1\times 10^{-31}\times v^2$

$v^2=4.2198\times 10^{11}$

$v=6.496\times 10^6\ m.s^{-1}$

<u>from the relation of magnetic and centripetal forces we have the radius as:</u>

$r=\frac{m.v}{q.B}$

$r=\frac{9.1\times 10^{-31}\times 6.496\times 10^6 }{1.6\times 10^{-19}\times 0.07}$

$r=5.278\times 10^{-4}\ m$

6 0

4 years ago