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3 years ago

IT IS NOT PHYSICS!! ITS PSYCHOLOGY!!!!

Physics

2 answers:

irga5000 [103]3 years ago

7 0

It’s D all of the above because of the the answer choices are true.

8_murik_8 [283]3 years ago

4 0

Answer:

disease are carried by the blood

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A 16.9 kg monkey is swinging on a 5.32 m long vine. It starts at rest, with the vine at a 43.0° angle. How fast is the monkey mo

NemiM [27]

Answer:

v = 5.7554 m/s

Explanation:

First of all we need to know if the angle of the vine is measured in the horizontal or vertical.

To do this easier, let's assume the angle is measured with the horizontal. In this case, the innitial height of the monkey will be:

h₀ = h sinα

h₀ = 5.32 sin43° = 3.6282 m

As the monkey is dropping from the innitial point which is the suspension point, is also dropping from 5.32. Then the actual height of the monkey will be:

Δh = 5.32 - 3.63 = 1.69 m

In order to calculate the speed of the monkey we need to understand that the monkey has a potential energy. This energy, because of the gravity, is converted in kinetic energy, and the value will be the same. Therefore we can say that:

Ep = Ek

From here, we can calculate the speed of the monkey.

Ep = mgΔH

Ek = 1/2 mv²

The potential energy is:

Ep = 16.9 * 9.8 * 1.69 = 279.9

Now with the kinetic energy:

1/2 * (16.9) * v² = 279.9

v² = (279.9) * 2 / 16.9

v² = 33.12

v = √33.12

Hope this helps

3 0

3 years ago

A 9500 kg boxcar traveling at 14 m/s strikes a stationary second car. The two stick together and move off with a speed of 6.0 m/

jasenka [17]

<u>Answer:</u> The mass of the second car is 12666.7 kg

<u>Explanation:</u>

To calculate the mass of car, we use the equation of law of conservation of momentum, which is:

$m_1u_1+m_2u_2=(m_1+m_2)v$

where,

$m_1$ = mass of car 1 = 9500 kg

$u_1$ = Initial velocity of car 1 = 14 m/s

$m_2$ = mass of car 2 = ? kg

$u_2$ = Initial velocity of car 2 = 0 m/s

$v$ = Final velocity = 6.0 m/s

Putting values in above equation, we get:

$(9500\times 14)+(m_2\times 0)=(9500+m_2)6.0\\\\m_2=\frac{9500\times 14}{6}-9500=12666.7kg$

Hence, the mass of the second car is 12666.7 kg

6 0

4 years ago

The Chernobyl reactor accident in what is now Ukraine was the worst nuclear disaster of all time. Fission products from the reac

Anna35 [415]

Answer:

The correct answer is "53.15 days".

Explanation:

Given that:

Half life of $131_{I}$ ,

$T_{\frac{1}{2} }= 8 \ days$

Let the initial activity be " $R_o$ ".
and, activity to time t be "R".

To find t when R will be "1%" of $R_o$ , then

⇒ $R=\frac{1}{100}R_o$

As we know,

⇒ $R=R_o e^{-\lambda t}$

or,

∴ $e^{\lambda t}=\frac{R_o}{R}$

By putting the values, we get

$=\frac{R_o}{\frac{R}{100} }$

$=100$

We know that,

Decay constant, $\lambda = \frac{ln2}{T_{\frac{1}{2} }}$

hence,

⇒ $\lambda t=ln100$

$t=\frac{ln100}{\lambda}$

$=\frac{ln100}{\frac{ln2}{8} }$

$=53.15 \ days$

5 0

3 years ago

A lightning flash releases about 1010J of electrical energy. Part A If all this energy is added to 50 kg of water (the amount of

zavuch27 [327]

Answer:

water is in the vapor state,

Explanation:

We must use calorimetry equations to find the final water temperatures. We assume that all energy is transformed into heat

E = Q₁ + $Q_{L}$

Where Q1 is the heat required to bring water from the current temperature to the boiling point

Q₁ = m $c_{e}$ ( $T_{f}$ -T₀)

Q₁ = 50 4180 (100 - 37)

Q₁ = 1.317 10⁷ J

Let's calculate the energy so that all the water changes state

$Q_{L}$ = m L

$Q_{L}$ = 50 2,256 106

$Q_{L}$ = 1,128 10⁸ J

Let's look for the energy needed to convert all the water into steam is

Qt = Q₁ + $Q_{L}$

Qt = 1.317 107 + 11.28 107

Qt = 12,597 10⁷ J

Let's calculate how much energy is left to heat the water vapor

ΔE = E - Qt

ΔE = 10¹⁰ - 12,597 10⁷

ΔE = 1000 107 - 12,597 107

ΔE = 987.4 10⁷ J

With this energy we heat the steam, clear the final temperature

Q = ΔE = m $c_{e}$ ( $T_{f}$ -To)

( $T_{f}$ -T₀) = ΔE / m $c_{e}$

$T_{f}$ = T₀ + ΔE / m $c_{e}$

$T_{f}$ = 100 + 987.4 10⁷ / (50 1970)

$T_{f}$ = 100 + 1,002 10⁵

$T_{f}$ = 1,003 10⁵ ° C

This result indicates that the water is in the vapor state, in realizing at this temperature the water will be dissociated into its hydrogen and oxygen components

4 0

3 years ago

Why are all people not doing business?

storchak [24]

Answer:

ion knoww im sorry

Explanation:

6 0

3 years ago