Select the correct answer.

Damon purchased a pair of sunglasses that were advertised as being polarized. Describe how Damon could test the sunglasses to ve

Andre45 [30]

Answer:

To verify that they're polarized, he could hold the two lenses perpendicular (90 degrees) to each other, one lens in front of the other, and point it at a light source. If no light passes through then the lenses are polarized

6 0

4 years ago

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.50 s, it is at

wariber [46]

Answer:

See it in the pic

Explanation:

See it in the pic

7 0

4 years ago

A girl in a canoe uses a paddle to push the canoe at rest from a dock giving it a speed of 0.30 m/s. If the paddle is in contact

Anika [276]

Canoe will start from rest and reach to speed v = 0.30 m/s

so here we will have

$v_i = 0$

$v_f = 0.30 m/s$

now in this speed increase it will take 0.75 second of time

so we can find the acceleration of canoe as we know that acceleration is rate of change in velocity

$a = \frac{v_f - v_i}{t}$

$a = \frac{0.30 - 0}{0.75} = 0.4 m/s^2$

now we can find the force on Canoe by using Newton's II law

$F = ma$

here m = mass of girl + mass of canoe

m = 27 + 52 = 79 kg

now by above formula

$F = 79 * 0.4 = 31.6 N$

so here it will have net force F = 31.6 N

6 0

3 years ago

A mail carrier parks her postal truck and delivers packages. To do so, she walks east at a speed of 0.80 m/s for 4.0 min, then n

Murljashka [212]

Explanation:

Given that,

She walks in east,

Speed = 0.80 m/s

Time = 4.0 min

In north,

Speed = 0.50 m/s

Time = 5.5 min

In west,

Speed = 1.1 m/s

Time = 2.8 min

(a). We need to calculate the unit-vector velocities for each of the legs of her journey.

The velocity of her in east

$\vec{v_{1}}=0.80\ \hat{x}\ m/s$

$\vec{v_{2}}=0.50\ \hat{y}\ m/s$

$\vec{v_{3}}=1.1\ \hat{-x}\ m/s$

(b). We need to calculate the unit-vector displacements for each of the legs of her journey

Using formula of displacement

$\vec{d_{1}}=v_{1}\times t_{1}$

In east ,

$\vec{d_{1}}=0.80\times4.0\times60$

$\vec{d_{1}}=192\ \hat{x}\ m$

In north,

$\vec{d_{2}}=0.50\times5.5\times60$

$\vec{d_{2}}=165\ \hat{y}\ m$

In west,

$\vec{d_{3}}=1.1\times2.8\times60$

$\vec{d_{3}}=184.8\ \hat{-x}\ m$

(c). We need to calculate the net displacement from the postal truck after her journey is complete

$\vec{d}=\vec{d_{1}}+\vec{d_{2}}+\vec{d_{3}}$

Put the value in the formula

$\vec{d}=192\hat{x}+165\hat{y}+184.8\hat{-x}$

$\vec{d}=7.2\hat{x}+165\hat{y}$

We need to calculate the magnitude of the displacement

$d=\sqrt{(7.2)^2+(165)^2}$

$d=165.16\ m$

The magnitude of the displacement is 165.16 m.

Hence, This is the required solution.

3 0

3 years ago

What is biomass energy

Flauer [41]

Industrially biomass, living or recently experienced obtain fuel from biological material or by using other industrial purposes are related. Widely, with the goal of obtaining biofuels fibers with cultivated plants, heat and chemicals used to obtain the means of animal and vegetable products. Biomass, organic waste can be burned as a fuel composition. However, geographical impact modified with, coal, organic materials such as oil-free. Are usually measured by dry weight

8 0

3 years ago

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