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never [62]
2 years ago
12

Air only has a density of 1.3kg/m². What is the mass of3m^3 of air?​

Physics
1 answer:
Katarina [22]2 years ago
8 0

Answer:

m = 3.9 [m³]

Explanation:

We must remember that the density of the substance is defined as the relationship between mass over volume. That is expressed in the following equation:

Ro = m/V

where:

Ro = density = 1.3 [kg/m³]

m = mass [kg]

V = volume = 3 [m³]

Now replacing the values.

m =Ro*V\\m = 1.3*3\\\\m=3.9[m^{3}]

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A motorcycle begins at rest and accelerates uniformly S7.9 we want to find a time to take the motorcycle to reach a speed of 100
Len [333]

The motorbike reaches 100 km/h in 3.5 seconds

Explanation:

The motion of the motorbike is a uniformly accelerated motion (= constant acceleration), therefore we can use the following suvat equation:

v=u+at

where

v is the final velocity

u is the initial velocity

a is the acceleration

t is the time

For the motorbike in this problem,

u = 0 (it starts from rest)

v = 100 km/h = 27.8 m/s is the final velocity

a=7.9 m/s^2 is the acceleration

Solving for t, we find the time it takes for the bike to reach that velocity:

t=\frac{v-u}{a}=\frac{27.8-0}{7.9}=3.5 s

Learn more about accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

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6 0
3 years ago
How many values must a 1-D<br> motion problem give you in<br> order to solve it?
MrRa [10]

Answer:

I think it is B: 3

Explanation:

3 0
3 years ago
What is the answer for number 10
Finger [1]

The vertical component is = vsinx m/s

If you know the angle, substitute the value of x.

If you know the velocity at which it is moving, substitute it for v

Hope it helps :)

3 0
3 years ago
What is the amount of displacement of a runner who runs exactly 2 laps around a 400 meter track?
max2010maxim [7]

At the end of the laps, the runner's displacement is zero.

8 0
3 years ago
An enconomy car has a mass of 800 kg. What is the weight of the car?
Maksim231197 [3]

Answer:

1763.70 lbs (weight)

Explanation:

Easy converting.

6 0
3 years ago
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