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Lapatulllka [165]

3 years ago

15

HELP PLEASE ASAP!!!!

1 answer:

murzikaleks [220]3 years ago

7 0

In science, it’s important that scientists use creativity and their imagination to come up with solutions for problems. They are driven by facts, experiments, and logical information.
On the other hand, pseudoscientists tend to be imaginative by not basing their explanation scientifically. Since they don’t use accepted scientific methods, they mostly come up with information based on person opinions and experiences.

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Why electric potential of earth is taken to be zero?

stiv31 [10]

The ground is very large an small amount of electric charge wont affect it

4 0

3 years ago

A force of 4400 N is exerted on a piston that has an area of 0.020 m.

asambeis [7]

Use Pascal's Law.

F1/A1 = F2/A2

F1 = 4400N

A1 = 0.020m^2

F2 = X

A2 = 0.040m^2

4400/0.020 = X/0.040

Cross multiply:

(4400 * 0.040) = 0.020X

176 = 0.020x

Divide both sides by 0.020

X = 176 / 0.020

X = 8800

The force is 8800 N

3 0

3 years ago

Determine the mechanical energy of this object. A 2 kg pendelum has a speed of 1 m/s at a height of 1/2 meter

Readme [11.4K]

Mechanical Energy: 10.81 J given that $g = 9.81 \; \text{m}\cdot\text{s}^{-2}$ .

<h3>Explanation</h3>

The mechanical energy of an object is the sum of its kinetic and potential energy.

Kinetic Energy of this object:

$\text{KE} = \dfrac{1}{2} \; m \cdot v^{2} = \dfrac{1}{2} \times 2 \times 1 = 1 \; \text{J}$

Gravitational Potential Energy of this object:

$g = 9.81 \; \text{m}\cdot\text{s}^{-2}$ .

$\text{PE} = m \cdot g \cdot h = 2 \times 9.81 \times \dfrac{1}{2} = 9.81 \; \text{J}$ .

8 0

3 years ago

Steelhead trout migrate up stream to spawn.Occasionally they need to leap up small waterfalls to continue their journey. Fortuna

Ainat [17]

Part a)

since steelhead jump under the influence of gravity

So we will use kinematic equations

$v_f^2 - v_i^2 = 2ad$

here at the maximum position we know that final speed will be zero

$v_f = 0$

$a = -9.8 m/s^2$

$v_i = 8m/s$

now we will have

$0 - 8^2 = 2(-9.8)d$

$d = 3.26 m$

so the maximum height that it can reach will be 3.26 m

Part B)

now if it reaches to height 1.8 m with initial speed 8 m/s

so here we will have

$y = v_i t + \frac{1}{2}at^2$

$1.8 = 8 t - \frac{1}{2}(9.8)t^2$

$4.9 t^2 - 8t + 1.8 = 0$

$t = 0.27 s$

5 0

4 years ago

Read 2 more answers

Please helppppppp!!!!!!!!!!!!!!!!!!!!!!!!

kykrilka [37]

Answer:

I think the Bulb No. 2 will stop emitting light if the bulb No. 1 burns out.

3 0

3 years ago