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Ksenya-84 [330]
3 years ago
8

Propose an experiment that could be used to demonstrate that friction is a contact force?

Physics
2 answers:
xxTIMURxx [149]3 years ago
5 0
When you take a balloon and rub it against your head. as soon as the balloon makes contact with something that allows electricity, the balloon makes friction and makes your hair stand up
vesna_86 [32]3 years ago
3 0
Maybe push or pull an object with a large amount of mass? you are force a (pushing through object) aka making contact. i hope i helped not good with physics :)
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Write any two difference between CGS and MKS system of measurement ?​
Tresset [83]

Answer:

MKS stands for Meter, Kilogram and second. In this system of unit mass is given in Kilogram, length in meter and time in second. ... CGS system stands for Centimeter- Gram- Second system. In CGS system, length is measured in centimeters mass is measured in grams and time is in seconds.

7 0
3 years ago
Is a battery that generates hydrogen,is that very explosive
Andrews [41]
The answer is yes!
Hydrogen gas is generated as part of the charging process of lead/acid cell batteries. If the hydrogen gas acculates in large concentrations in a building or room or a box, an electrical spark or other ignition source will cause the hydrogen to burn in a rapid reaction causing an possible explosion.
A good example of a hydrogen gas explosion and fire is the "Hindenburg" disaster of the old flying blimps or zepplins.
7 0
3 years ago
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats faci
Klio2033 [76]

Answer:

The radius of a chamber is 2.36 meters.

Explanation:

Given that,

The outer wall moves at a speed of 2.72 m/s.

Mass of the person, m = 75.1 kg

The person feels a force of 235 N force pressing against his back. The force acting on the person is centripetal force. It is given by the below formula :

F=\dfrac{mv^2}{r}

r is the radius of a chamber

r=\dfrac{mv^2}{F}

r=\dfrac{75.1\times (2.72)^2}{235}

r = 2.36 meters

So, the radius of a chamber is 2.36 meters. Hence, this is the required solution.

7 0
3 years ago
The three-toed sloth is the slowest moving land mammal. On the ground, the sloth moves at an average speed of 0.037 m/s, conside
Georgia [21]

Answer:

tortoise distance w.r.t sloth is 28.08 m further

Explanation:

given data

average speed v1 = 0.037 m/s

walking speed v2 = 0.076 m/s

time t = 12 min = 720 seconds

to find out

how much tortoise have gone wrt sloth

solution

we find here first tortoise walk that is

distance d1 = v2 × t

distance d1 =  0.076  × 720

distance d1 = 54.72 m

and sloth walk distance

distance d2 = v1 × t

distance d2 = 0.037 × 720

distance d2 = 26.64 m

and so

tortoise distance w.r.t sloth = d1 - d2

tortoise distance w.r.t sloth = 54.72 - 26.64 = 28.08

tortoise distance w.r.t sloth is 28.08 m further

7 0
3 years ago
If a display has a dynamic range of 20 dB and the smallest voltage it can handle is 200 mV, then the largest voltage it can hand
DedPeter [7]

Answer:

The largest voltage is 0.02 V.

(d) is correct option.

Explanation:

Given that,

Range = 20 dB

Smallest voltage = 200 mV

We need to calculate the largest voltage

Using formula of voltage gain

G_{dB}=10 log_{10}(\dfrac{V_{out}^2}{V_{in}^{2}})

20 =10 log_{10}(\dfrac{V_{out}^2}{V_{in}^{2}})

2=log_{10}(\dfrac{V_{out}^2}{V_{in}^{2}})

10^2=\dfrac{V_{out}^2}{V_{in}^{2}}

\dfrac{V_{out}}{V_{in}^}=10

V_{in}=\dfrac{V_{out}}{10}

V_{in}=\dfrac{200}{10}

V_{in}=20\ mV

V_{in}=0.02\ V

Hence, The largest voltage is 0.02 V.

8 0
3 years ago
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