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2 years ago

You have six 1.5 kω resistors.

Physics

1 answer:

atroni [7]2 years ago

3 0

Answer:

Have three pairs of 1.5kΩ connected in series and then connect all three in parallel.

Explanation:

This problem is kind of hard to explain and is based off my experience and intuition. I'll show how I got the answer and then explain afterwards.

If you have three pairs of 1.5kΩ in series, you get 3 3.0kΩ resistor equivalent (resistors in series). Putting them in parallel, you use get a resistance of 1 kΩ as shown below:

$R_{eq} = (\frac{1}{R_{1}} + \frac{1}{R_{2}} +...+\frac{1}{R_{n}} )^{-1} \\R_{eq} = (\frac{1}{R_{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}} )^{-1}\\R_{eq} = (\frac{1}{3} + \frac{1}{3} + \frac{1}{3} )^{-1}\\ R_{eq} = 1$

How I got here takes some math sense. Since 1.5kΩ is greater than 1.0kΩ, you know there is a parallel combination. Next I considered what are the possible combinations. Since two 1.5kΩ resistors yielded 3.0kΩ, and you have 3 pairs of 3.0kΩ resistor, the sum of parallel would be 1.0kΩ

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enyata [817]

Answer:

5.76 round off to 6

Explanation:

wall 1 = 15 × 12 = 180

wall 2 = 9 × 12 = 108

now 1 roll covers 50 square feet

formula = wall 1 + wall 2 / 50

= 180 + 108 / 50

= 288÷ 50

= 5.76

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2 years ago

James Cameron piloted a submersible craft to the bottom of the Challenger Deep, the deepest point on the ocean's floor, 11,000 m

Over [174]

Answer:

$4.1\cdot 10^8 N$

Explanation:

First of all, we need to find the pressure exerted on the sphere, which is given by:

$p=p_0 + \rho g h$

where

$p_0 =1.01\cdot 10^5 Pa$ is the atmospheric pressure

$\rho = 1000 kg/m^3$ is the water density

$g=9.8 m/s^2$ is the gravitational acceleration

$h=11,000 m$ is the depth

Substituting,

$p=1.01\cdot 10^5 Pa + (1000 kg/m^3)(9.8 m/s^2)(11,000 m)=1.08\cdot 10^8 Pa$

The radius of the sphere is r = d/2= 1.1 m/2= 0.55 m

So the total area of the sphere is

$A=4 \pi r^2 = 4 \pi (0.55 m)^2=3.8 m^2$

And so, the inward force exerted on it is

$F=pA=(1.08\cdot 10^8 Pa)(3.8 m^2)=4.1\cdot 10^8 N$

8 0

2 years ago

Read 2 more answers

A plane flying at 70.0 m/s suddenly stalls. If the acceleration during the stall is 9.8 m/s2 directly downward, the stall lasts

tino4ka555 [31]

Answer:

v = 66.4 m/s

Explanation:

As we know that plane is moving initially at speed of

$v = 70 m/s$

now we have

$v_x = 70 cos25$

$v_x = 63.44 m/s$

$v_y = 70 sin25$

$v_y = 29.6 m/s$

now in Y direction we can use kinematics

$v_y = v_i + at$

$v_y = 29.6 - (9.81 \times 5)$

$v_y = -19.5 m/s$

since there is no acceleration in x direction so here in x direction velocity remains the same

so we will have

$v = \sqrt{v_x^2 + v_y^2}$

$v = \sqrt{63.44^2 + 19.5^2}$

$v = 66.4 m/s$

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2 years ago

Human muscles have an efficiency of about __________. A. 9 to 17% B. 18 to 26% C. 27 to 35% D. 36 to 44%

xxTIMURxx [149]

Answer:

The correct answer would be B. 18 to 26%.

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It is estimated that human muscles have an efficiency of about 18% to 26%.

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In addition, there is second energy loss when energy in the form of ATP is converted into the mechanical energy such as rowing, cycling et cetera.

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2 years ago

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stellarik [79]

Let there be N number of wires.

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100 N = W

so, W = 100N

W is the weight of bucket and 100N is its maximum value.

8 0

2 years ago