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3 years ago

When the pressure Is High the density Is smaller or larger

Physics

1 answer:

loris [4]3 years ago

4 0

When pressure increases, density increases. When the pressure decreases, density decreases.

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Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. When the carts collide, they hook toget

Nikitich [7]

Answer:

Second option

Explanation:

Linear Momentum

The linear momentum of an object of mass m and speed v is

P=mv

If two or more objects are interacting in the same axis, the total momentum is

$P_t=m_1v_1+m_2v_2+...$

Where the speeds must be signed according to a fixed reference

The images show a cart of mass 2m moves to the left with speed v since our reference is positive to the right

$P_1=-2mv$

The second cart of mass m goes to the right at a speed v

$P_2=mv$

The total momentum before the impact is

$P_t=-2mv+mv=-mv$

The total momentum after the collision is negative, both carts will join and go to the left side

The first option shows both carts with the same momentum before the collision and therefore, zero momentum after. It's not correct as we have already proven

The third option shows the 2m cart has a positive greater momentum than the other one. We have proven the 2m car has negative momentum. This option is not correct either

The fourth option shows the two carts keep separated after the collision, which contradicts the condition of the question regarding "they hook together".

The second option is the correct one because the mass $m_2$ has a negative momentum and then the sum of both masses keeps being negative

3 0

4 years ago

Read 2 more answers

Which statements belong to dalton's atomic theory? select all that apply

kvv77 [185]

The answers would be:

3. Atoms cannot be broken down into smaller pieces (or indivisible)

4. All atoms of an element are identical.

5. Chemical reactions cause atoms to be rearranged.

Although all of the statements regarding atoms are true, because of the technology during Dalton's time, the others were not yet discovered. As time progressed modifications were made which built our modern atomic theory.

3 0

3 years ago

Read 2 more answers

A gas has a variable volume. True False

nekit [7.7K]

Answer:

True

Explanation:

Gas always live in free state but some gas is not . We can said that mostly gas volume can be changeable during disturbing by environment situation.

4 0

2 years ago

Which is the function of a nucleus within a eukaryotic cell?

DerKrebs [107]

ANSWER
D) store genetic information that provides instructions for the cell

6 0

3 years ago

If the frequency of oscillation of the wave emitted by an fm radio station is 92.4 mhz, determine the wave's period of vibration

lapo4ka [179]

The basic relationship between the frequency of a wave and its period is
$f= \frac{1}{T}$
where f is the frequency and T the period of vibration.

In our problem, the frequency is
$f=92.4 MHz = 92.4 \cdot 10^6 Hz$
so, by re-arranging the previous formula, we can find the period of the wave:
$T= \frac{1}{f}= \frac{1}{92.4 \cdot 10^6 Hz}=1.1 \cdot 10^{-8} s$

3 0

3 years ago

When the pressure Is High the density Is smaller or larger​

When the pressure Is High the density Is smaller or larger