total gas pressure= pressure of 1st gas+pressure of 2nd gas. ⇒1.22atm=0.58atm+unknown atm
1.22atm-0.58atm=unknown atm
unknown atm=0.64atm
To change from mass to weight is Fw = 30 kg * 9.8 m/s^2 = 294 N. To change from weight to mass divide by gravity (9.8 m/s^2).
Frictional force
Explanation:
Frictional force is a force that opposes the motion between two surfaces that are in contact with one another.
Frictional force opposes motion and it is directed opposite the direction of motion.
There is also frictional force between liquids too.
- Enough force must be supplied in order to overcome this frictional force so as to make a body move.
- In humans, motion wouldn't be possible without the frictional force.
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Answer:
70 mph
Explanation:
We can write the position of the car at time t as
where is the speed of the car, while the position of the truck is
where
is the initial distance between the car and the truck (at 3:00 pm)
is the speed of the truck
The car overcomes the truck when they have same position, so
This occurs at 4:30 pm, so 1:30 h (1.5 h) after the initial instant. So, by using
t = 1.5 h
And solving the equation for , we find the speed of the car:
Neon is an element, and on top of that a noble gas, which makes it resistant to forming compounds with other elements. The answer is A.