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Phantasy [73]
3 years ago
15

A force that needs to touch something to affect it

Physics
2 answers:
bija089 [108]3 years ago
8 0


I would say friction because it requires to surfaces in order for the force to take place

correct me if I'm wrong.

Levart [38]3 years ago
4 0
Our life is full of forces. We cannot see these forces but we can see how they affect different things
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. A student claims that if lighting strikes a metal flagpole, the force exerted by the Earth’s magnetic field on the current in
Ratling [72]

Answer:

Explanation:

Given that, current generated from lightning range from

10⁴ A < I < 10^5 A

We know that,

The magnetic force is given as

F = iLB

The magnetic field on the earth surface is

B = 10^-5 T

So, let assume the worst case of a 15m flag pole

L = 15m

Then,

F = iLB

F = 10^5 × 10 × 10^-5

F = 15 N

Therefore, 15N is fairly strong so it will come to the material that was use for the material of the flag pole.

Therefore, it is possible that the student is right depending on the material of the flag pole.

7 0
3 years ago
Physics questions please help me
Ahat [919]
Hi,Find  answers from Task 5

1.(X+4)+(X)+(X+4)+(X)=50cm

4x+8=50cm

4x=42

X=10.5cm

Length=10.5+4=14.5cm

Width=10.5cm

Area= length × width=(10.5/100) × (14.5/100) =0.0152m2

2. Volume of a sphere= 4/3 ×π×r³

4/3 ×π×r³=3.2×10^-6 m³

r³=3.2×10^-6 m³/1.33×π

r³=7.64134761e-7

r=0.00914m

Surface area of the blood drop= 4πr²

=4×3.142×0.00914×0.00914=0.00105m²

3.

Equation of an ideal gas     = PV =n RT  

Equation for pressure, = P= n RT/V

Equation for the volume of an ideal gas= V= n RT/P

If the volume of gas doubles ,V(new)=  2n RT/P

Equation for temperature of an ideal gas, T = PV/n R

If temperature of gas triples, T (new)= 3PV/n R

New Equation for Pressure, = n× R× (3PV/n R)/(2n RT/P)

Pressure factor increase= P(new)/P(old)  ={ n× R× (3PV/n R)/(2n RT/P)}/{ n RT/V}

=3PV²/2n RT
5 0
3 years ago
2. What is one reason why the author includes information about religious beliefs during the time of Johannes Fabricius' discove
Lesechka [4]

B. to show that there was conflict between what scientists were observing about the universe and what religion taught them
8 0
3 years ago
Garret's swimming coach is giving him important and helpful tips to improve his swimming skills. Which gesture suggests that Gar
bogdanovich [222]

Answer: "important and helpful" Show garret is paying close attention to her coach. Hope this help!

7 0
3 years ago
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Wilbur ran 1-kilometer. Then he ran 500 meters. How many meters did Wilbur run all together?
Blababa [14]
The answer is B 1,500 meters since 1 kilometer to meters is 1,000 and u add the 500
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