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mestny [16]
3 years ago
5

Two groups of students made plans to help their community during a hurricane. The first group suggested training the community a

bout safe evacuation routes and nearby shelters. The second group suggested stocking food items in every house of the community. Why is training about safe evacuation routes a better method to help a community during a hurricane than stocking food items?
Select one:
a. It is easier to find evacuation routes than buy food items.
b. Evacuation routes are more environmentally friendly than food items.
c. It is less expensive to find evacuation routes than to buy food items.
d. Evacuation routes provide immediate safety from hurricanes unlike food items.
Physics
1 answer:
zysi [14]3 years ago
8 0
The correct option is D.
During hurricane, the most important thing is to get people out to safety in order to save their lives. Training the community about safety evacuation route is by far the better idea because it provide immediate safety from the natural hazard. The second idea is not a good one at all, because if food are stocked in every house in the community, the food will be destroyed alongside other things during the hurricane. 
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A pendulum is made from a thin cylindrical rod pivoted at the end. It has a length of 0.30 m and radius 0.001 m. It swings up to
Art [367]

Answer:

Maximum angle is 23.91^{\circ} rad

Explanation:

As per the question:

length of the pendulum, L = 0.30 m

Radius of the pendulum, R = 0.001 m

Angular speed at the bottom, \omega = 2.9\ rad/s

Now,

To calculate the maximum angle, \theta_{m}:

For the pendulum, the moment of inertia, I = \frac{ML^{2}}{3}

Now, using the principle of the conservation of energy:

Kinetic energy = Potential energy

\frac{1}{2}\times I\omega^{2} = mgh

where

h = \frac{L}{2}(1 - cos\theta_{m})

Thus

\frac{1}{2}\times \frac{mL^{2}}{3}\times \omega^{2} = m\times 9.8\times \frac{L}{2}(1 - cos\theta_{m})

1 - cos\theta_{m} = \frac{0.3\times 2.9^{2}}{3\times 9.8}

theta_{m} = cos^{- 1}(0.914) = 23.91^{\circ}

6 0
4 years ago
ASAP WILL GIVE BRAINLIEST!!!
Oksana_A [137]

Answer:

<em>The change in momentum of the car is 3575 Kg.m/s</em>

Explanation:

<u>Impulse and Momentum</u>

The impulse (J) experienced by the object equals the change in momentum of the object (Δp).

The formula that represents the above statement is:

J = Δp

The impulse is calculated as

J = F.t

Where F is the applied force and t is the time.

The car hits a wall with a force of F=6500 N and stops in 0.55 s. Thus, the impulse is:

J = 6500 * 0.55

J = 3575 Kg.m/s

The change in momentum of the car is:

\Delta p= J = 3575\ Kg.m/s

The change in momentum of the car is 3575 Kg.m/s

5 0
3 years ago
xercise 15.29: At a distance of 6.00×1012 m from a star, the intensity of the radiation from the star is 14.7 W/m2. Assuming tha
Fynjy0 [20]

Answer:

6.65*10^{27}W

Explanation:

The relationship of intensity:

I=\frac{P}{4\pi r^{2} }

Intensity: I=14W/m^{2}

radius: r=6.00*10^{12} m

Power is unknown

Now we can apply the formula

I=\frac{P}{4\pi r^{2} }\\P=I(4\pi r^{2})\\P=14.7(4*\pi *(6.00*10^{12} )^{2} )\\P=6.65*10^{27} W

5 0
3 years ago
Nitrogen is used to protect steel from water because nitrogen has ________.
tiny-mole [99]

Answer:

Nitrogen is used to protect steel from water because nitrogen has low reactivity.

Explanation:

Nitrogen is very low reactive element because it forms a gas when triple bond between two Nitrogen atoms. Due to low reactivity of Nitrogen the water does not react with the nitrogen and steel as well. So, for protection of steel Nitrogen is used.

4 0
3 years ago
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ahrayia [7]

Answer:

1. Imaginary

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8. Eastern

9. Parallels

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6 0
3 years ago
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