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neonofarm [45]
3 years ago
8

A box is sliding up an inclined plane with friction, and it is speeding up.What free-body diagrams matches this description?

Physics
1 answer:
sukhopar [10]3 years ago
6 0

Answer: photo

Explanation: because

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In space movies, spacecrafts explode and oxygen is needed for a fire to start. Why is it wrong? What would really happen?
Triss [41]

Answer:

Hey

The reason these "space movies" are wrong is because objects in "space" (not in a "space" craft) can't catch on fire because there is no air in "space".

6 0
3 years ago
In a closed energy system, energy is?​
Alisiya [41]

Answer:

Explanation:

A closed system can exchange energy but not matter, with its surroundings. An isolated system cannot exchange any heat, work, or matter with the surroundings, while an open system can exchange energy and matter.

Hope this helped you!

3 0
3 years ago
A mountaintop is a height y above the level ground. A woman measures the angle of elevation of the
Kamila [148]
Refer to the diagram shown below.
We want to find y in terms of d, φ and θ.

By definition,
tan (\theta) =  \frac{y}{x} \\\\ tan( \phi) = \frac{y}{x-d}

Therefore
y = x tan(θ)                   (1)
y = (x - d) tan(φ)           (2)

Equate (1) and (2).
(x - d) \, tan(\phi) = x \, tan(\theta) \\ x[tan(\phi) - tan(\theta)] = d \, tan(\phi) \\ x= \frac{d tan(\phi)}{tan(\phi)-tan(\theta)}

From (1), obtain the required expression for y.

Answer:
y= \frac{d \, tan(\phi) \, tan(\theta)}{tan(\phi)-tan(\theta)}

7 0
3 years ago
What is the energy released in this B- nuclear reaction 2K-> 2Ca0,e? (The atomic mass of 42 K is 41.962403 u and that of 42Ca
Katyanochek1 [597]

<u>Answer:</u> The energy released in the given nuclear reaction is 3.526 MeV.

<u>Explanation:</u>

For the given nuclear reaction:

_{19}^{42}\textrm{K}\rightarrow _{20}^{42}\textrm{Ca}+_{-1}^{0}\textrm{e}

We are given:

Mass of _{19}^{42}\textrm{K} = 41.962403 u

Mass of _{20}^{42}\textrm{Ca} = 41.958618 u

To calculate the mass defect, we use the equation:

\Delta m=\text{Mass of reactants}-\text{Mass of products}

Putting values in above equation, we get:

\Delta m=(41.962403-41.958618)=0.003785u

To calculate the energy released, we use the equation:

E=\Delta mc^2\\E=(0.003785u)\times c^2

E=(0.003785u)\times (931.5MeV) (Conversion factor: 1u=931.5MeV/c^2 )

E=3.526MeV

Hence, the energy released in the given nuclear reaction is 3.526 MeV.

7 0
3 years ago
HELP ME PLZ A student wishes to conduct a controlled experiment on the effects of gender on the ability to adapt to left–right i
Kruka [31]

Answer:

All of the above lol!

Explanation:

Brainliest Please!

7 0
2 years ago
Read 2 more answers
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