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Sunny_sXe [5.5K]
2 years ago
8

How much fuel should you collect before starting a fire?

Physics
1 answer:
juin [17]2 years ago
6 0

Answer:

Collect more fuel than you think you can use; you may need more than you estimate. Pile fine twigs, grass, or bark shavings loosely as a base.

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Any characteristic of matter that you can observe is a _________. <br><br><br><br><br> Plz help.
Stells [14]

Answer:

any characteristic of matter that can be observed without changing the identity of the material. Scientists call a characteristic of matter that you can detect with your senses a Physical property. color, shape, smell, taste, mass, volume, and density.

Explanation:

7 0
3 years ago
Read 2 more answers
a bungee jumper jumps off a bridge and bounces up and down several times, she finally went up to rest 16 m below the bridge from
katen-ka-za [31]

Answer:

E = 4410 J

Explanation:

The net energy change is equal to the change in potential energy

ΔPE = mgΔh = 50(9.8)(16) = 7,840 J

However some of that energy went into the stretch of the spring.

that stretch is found setting the spring force equal to the weight

kx = mg

x = 50(9.8)/35 = 14 m

so energy stored in the spring is

PS = ½kx² = ½(35)(14²) = 3,430

energy lost to friction is 7840 - 3430 = 4,410

6 0
3 years ago
Water from a leaking tap begins to fall into
Amanda [17]

Answer:

It will take 20,000 seconds to get a pressure of 200Pa at the bottom of the tank.

Explanation:

The pressure at the bottom of the tank will be

P = \dfrac{Mg}{A}

where M is the mass of the water, and A is the base area of the tank.

The base area of the tank is

A = 0.5m* 2m = 1m^2,

and if we want the pressure at the bottom to be 200pa, then it must be that

200Pa = \dfrac{M(10m/s^2)}{1m^2},

solving for M we get:

M = 20kg\\

which is the required mass of the water in the tank.

Now, the tank fills at a rate of 2 drops per second or

2 (0.05g)/s = 0.10g/s = 0.0001kg/s

since each drop weights 0.05g.

Therefore, the time t it takes to collect 20kg of water will be

t = 20kg \div \dfrac{0.0001kg}{s}

t = 2*10^5s

which is 55.56 hours or 2 days and 7.56 hours.

Thus, it will take 20,000 seconds to get a pressure of 200Pa at the bottom of the tank.

7 0
3 years ago
State ohm’s law Q.34.7
defon

Ohm's law states that: V=RI

Explanation:

Ohm's law states that in a conductor, the potential difference across the conductor is directly proportional to the current flowing through it. Mathematically,

V \propto I

where

V is the potential difference

I is the current

The constant of proportionality is called resistance (R), and it gives a measure of "how much the conductor opposes" to the flow of current. Therefore Ohm's law can be rewritten as

V=RI

where R is the resistance. By rewriting the equation as

I=\frac{V}{R}

we see that the larger the resistance, the lower the current in the conductor.

Learn more about Ohm's law:

brainly.com/question/4438943

brainly.com/question/10597501

brainly.com/question/12246020

#LearnwithBrainly

4 0
4 years ago
1. Earth's ozone layer is responsible for absorbing from the sun
ladessa [460]

Answer:

UV light

climate

hydrofluorocarbons or HFCs

pollutants

heat

As sunlight falls on Earth's surface, it heats up the surface. Infrared light is emitted from the surface and is absorbed in the atmosphere, where it is converted to heat. This heat remains trapped in the atmosphere, causing the temperature near the surface to increase.

Explanation:

these are all correct

5 0
3 years ago
Read 2 more answers
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