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3 years ago

Two arrows are fired horizontally with the same speed of

Physics

1 answer:

Fed [463]3 years ago

6 0

Answer:

Explanation:

Given

mass of each arrow=0.1 kg

velocity of arrow=30 m/s

One arrow is fired u=due to east and another towards south

Momentum of first arrow

$P_1=0.1\left ( 30\hat{i}\right )=3\hat{i}$

$P_2=0.1\left ( -30\hat{j}\right )=-3\hat{j}$

Total momentum P

$P=P_1+P_2$

$P=3\hat{i}-3\hat{j}$

magnitude $|P|=\sqrt{3^2+3^2}=3\sqrt{2}$

direction

$tan\theta =\frac{-3}{3}$

$\theta =45^{\circ}$ clockwise w.r.t to east

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4 years ago

A closely wound rectangular coil of 75.0 turns has dimensions of 22.0 cm by 45.0 cm . The plane of the coil is rotated from a po

pentagon [3]

Answer:51.52 V

Explanation:

Given

N=75 turns

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3 years ago

Q: A: The long distance water movement, from roots up to leaves, of the water transport in large plants depends on one unique pr

ICE Princess25 [194]

Answer: B

Cohesion makes water stick together, which is vital in transporting nutrients from tree roots to other parts of the plant.

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3 years ago

Read 2 more answers

Capillary action in trees can transport water from the roots to the tree's branches. The capillaries (Xyelem) in a certain tree

lesantik [10]

Answer:

$h=14.2857\,m$

Explanation:

Given:

radius of capillary, $r=10^{-6}\,m$

angle of contact, $\theta=0^{\circ}$

density of water, $\rho=1000\,kg.m^{-3}$

surface tension of water, $T=0.07 \,N.m^{-1}$

height, h = ?

We have the equation for the height of meniscus as:

$h=\frac{2T.cos\, \theta}{\rho.g.r}$

$h=\frac{2\times 0.07\times cos\,0^{\circ}}{1000\times 9.8\times 10^{-6}}$

$h=14.2857\,m$

No, the capillary action alone cannot be the mechanism of water transportation to the top of the trees. Transpiration also creates a suction pressure in the xylem complementary to the ascent of sap and cohesion of water being the other causes of movement of water up in the plants.

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3 years ago

Three beakers are of identical shape and size , one beaker is pained matt black, one is dull white and one is gloss white . The

JulsSmile [24]

Answer:

The beaker that is matt black heats more quickly because black attracts more heat.

Explanation:

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3 years ago