All categories

3 years ago

Need now

Physics

2 answers:

o-na [289]3 years ago

8 0

ice ice baby wow hello wow hello

Explanation:

yesyes

Anna007 [38]3 years ago

7 0

1. the volume of the balloon will decrease
2. the balloon will decrease in volume and then stop as it is in thermal equilibrium
3. don’t really know what it’s asking but higher thermal energy means more motion of molecules
4. the volume of the balloon is dependent on the amount of molecular motion

was kinda hard to understand the question but i hope this helps

You might be interested in

What current, in units of milliAmperes, would produce a potential difference of 4.5

Bess [88]

Answer;

<u>= 56.96 mA</u>

Explanation;

From the Ohm's law;

V = IR, where V is the potential difference in volts, I is the electric current in amperes and R is the resistance in ohms.

V = 4.5 volts, R = 79 Ω

Making I the subject of the formula we get;

I =V/R

= 4.5 /79

= 0.05696 A

But, 1 A = 1000 mA

Thus; 0.05696 × 1000

<u>= 56.96 mA</u>

5 0

3 years ago

A 0.25-kilogram ball is observed to accelerate at 4,000 m/sec2 as it is hit with a bat.

Shtirlitz [24]

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 0.25 × 4000

We have the final answer as

Hope this helps you

7 0

3 years ago

A car traveling at 27 m/s runs out of gas while traveling up a 8.0 ∘ slope. How far will it coast before starting to roll back d

Ad libitum [116K]

Answer:

Approximately $2.7 \times 10^{2}\; \rm m$ along the slope, assuming that no energy was lost to friction.

Explanation:

Let $v$ denote the initial velocity of this vehicle. Let $m$ denote the mass of this vehicle. The kinetic energy (KE) of this vehicle would have initially been:

$\displaystyle \frac{1}{2}\, m \cdot v^{2}$ .

The gain in the gravitational potential energy (GPE) of this vehicle is proportional to the increase in its height.

Let $g$ denote the gravitational field strength. $g \approx 9.81\; \rm m \cdot s^{2}$ on the earth. If the increase in the height of this vehicle is $h$ , this vehicle would have gained GPE:

$m \cdot g \cdot h$ .

Hence, the height of this vehicle is maximal when the GPE of this vehicle is maximized.

Since the vehicle went out of fuel, all its GPE would have been converted from KE. Assuming that no energy was converted to friction. The GPE of this vehicle would be maximal when the entirety of the KE was converted to GPE.

Hence, the maximal GPE of this vehicle would be equal to its initial KE:

$\displaystyle m \cdot g \cdot h = \frac{1}{2}\, m \cdot v^{2}$ .

The maximum height of this vehicle would be:

$\begin{aligned} h &= \frac{(1/2) \, m \cdot v^{2}}{m \cdot g}\\ &= \frac{v^{2}}{2\, g}\end{aligned}$ .

Given that $v = 27\; \rm m\cdot s^{-1}$ , the maximum height of this vehicle would be:

$\begin{aligned} & \frac{v^{2}}{2\, g} \\ =\; & \frac{(27\; \rm m\cdot s^{-1})^{2}}{2 \times 9.81\; \rm m\cdot s^{-2}} \\ \approx \; &37.2\; \rm m\cdot s^{-1}\end{aligned}$ .

Refer to the diagram attached. The distance that this vehicle traveled along the slope would be approximately:

$\begin{aligned}\frac{37.2\; \rm m}{\sin(8.0^{\circ})} \approx 2.7 \times 10^{2}\; \rm m\end{aligned}$ .

6 0

3 years ago

compare the arrangement of atoms or molecules in an amorphous solid to the arrangement of atoms or molecules in a crystalline so

Lisa [10]

The answer to the question asked above is that amorphous solid's atoms and molecules are not arranged in a definite lattice pattern, while crystalline are arranged definitely in a lattice pattern.

Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.

7 0

3 years ago

A 934 kg object at rest has what momentum ?

AlekseyPX

Answer:

Explanation:

An object that is at rest and not moving will always have 0 momentum!

I hope this helped!

6 0

2 years ago