3 years ago

Which of these is considered a contact force? *

Physics

2 answers:

Klio2033 [76]3 years ago

5 0

Answer:

Explanation:

the force between two magnets

Musya8 [376]3 years ago

5 0

It one!!!!!!!!!!!!!!!!!!!!!

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A car hits a wall with a force of 80 N and

ASHA 777 [7]

Formula for acceleration: A=Force/Mass
A=F/M
A=80N/4.5kg
A=17.7 m/s^2

Unit for A is meters per second (m/s^2)
Hope this helps :)

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3 years ago

What is the gauge pressure (in atm) in a 25.0°C car tire containing 3.81 mol of gas in a 31.5 L volume? (Enter your answer to at

bagirrra123 [75]

Answer:

Explanation:

Given

Temperature of gas $T=25^{\circ}C\approx 298\ K$

Volume of gas $V=31.5\ L\approx 31.5\times 10^{-3}\ m^3$

no of moles of gas $n=3.81\ mol$

Using Ideal gas Equation to find the Pressure of gas

$PV=nRT$

where P=Absolute Pressure

V=Volume

R=Universal gas constant

T=Temperature

$P\times 31.5\times 10^{-3}=3.81\times 8.314\times 298$

$P=\frac{3.81\times 8.314\times 298}{31.5\times 10^{-3}}$

$P=299.66\ kPa$

And we know Atmospheric Pressure is $101.325\ kPa$

Therefore Gauge pressure is given by

$P_{gauge}=P-P_{atm}$

$P_{gauge}=299.66-101.325$

$P=198.34\ kPa$

4 0

3 years ago

When two 10-Ohm resistors are in parallel in a circuit, what is the net resistor value

Elza [17]

Answer:

Net capacitance

let net capacitance be R

1/R = 1/10+1/10

1/R=2/10

1/R=1/5

cross mutiply

R=5

the net capacitance is 5ohms

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4 years ago

Radioactive decay of 40k atoms in an igneous rock has resulted in a radio of 25 percent 40k atoms to 75 percent 40Ar and 40Ca at

Ivanshal [37]

In order to answer this, we would need to know
the half-life of ⁴⁰K. Perhaps when you look that up,
you'll be able to answer this on your own.

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3 years ago

A car is travelling at a constant speed of 50 km/h. How long will it take to travel 20 km? *

Sholpan [36]

20km / 50km/h = 0.4h = 24mins

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3 years ago