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Burka [1]
4 years ago
12

Pleaseeee help!!!!!!!!!!

Physics
1 answer:
Artemon [7]4 years ago
4 0
The answer is A. Adjective and adverb must go after the word modify
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A 9Ω resistance is cut into three equal parts and connected in parallel. Find the equivalent resistance of the combination.​
sammy [17]

Answer:

the ans i 1 ohm

Explanation:

if i cut a resistor of 9 ohm into 3 equal parts then each resistor will have a resistance of 3 ohm and if they are in parallel combination the net resistance will be R

so 1/R=1/R1+1/R2+1/R3

     1/R=1/3+1/3+1/3

      R=1

7 0
3 years ago
What is the electric force on a proton 2.5 fm from the surface of the nucleus? hint: treat the spherical nucleus as a point char
Whitepunk [10]
In this case, you need the formula below where:

F = force
k = coulombs constant 8.99 x10^{9} N.m^{2} . C^{-2}
q1 = electric charge 1
q2 = electric charge 2
r = the distance between the charges

F = k((q1.q2)/r^{2})

pls note: make sure your units are correct (in meters etc, not fm (<em>femto-meters</em>)).

Curiously, this question doesn't tell you what atom you are next to the nucleus of. Different numbers of protons in the nucleus of the atom will make for vastly different forces in your answer...
6 0
3 years ago
Wind blows at the speed of 30m/s across a 175m^2 flat roof if a house.
Makovka662 [10]

Answer:

the net force is 101587.5 N

Explanation:

The speed of wind

v = 30 m/s

The area of roof,

A = 175 m 2

The expression for the Bernoulli's theorem.

P = 12 ρv 2 ...... (1)

Here,

P is the pressure difference,

ρ is the density of air and

v is the speed of wind.

The expression for the pressure.

P = F A ..... (2)

Here,

F is the force and

A is the area of roof.

Part (a)

Substitute the values for the pressure difference in equation (1)

P = 12 × 1.29 × (30) 2 P = 580.5 Pa

Thus, the pressure difference at the roof between the inside and outside air is

580.5 Pa

Part (b)

Substitute the values for the net force in equation (2)

580.5 = F 175 F = 101587.5 N

Thus, the net force is 101587.5 N.

8 0
4 years ago
Why does a tail appear when a comet nears the sun?
ahrayia [7]
It heats up. the ice transforms directly from a solid to a vapor, releasing dust particles. the solar wind sweeps the material and it forms what to appears to be a tail.
3 0
4 years ago
What is required to bring about phase change?
Sauron [17]
To change of phase from gaseous to liquid.....The amount of energy required to change a unit mass of a subtance from solid to liquid (and vice versa)
4 0
3 years ago
Read 2 more answers
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