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AveGali [126]
3 years ago
14

If a 65-kilogram astronaut exerts a force with a magnitude of

Physics
1 answer:
nalin [4]3 years ago
7 0

50N.

The magnitude of the reaction to any force is equal to the magnitude of the first force.  (See Newton #3.)

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According to the law of conservation of energy, which statement must be
RoseWind [281]

Answer:

<h2>1 st statement is correct </h2>

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside

<h2>hope you understand and got your answer by my explanation </h2><h2>thanks </h2>

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8 0
3 years ago
3. A copper rod is 3 m long at a certain temperature. Calculate its length for a temperature rise of 100K
Paul [167]

Answer:

-43

Explanation:

6 0
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To keep the calculations fairly simple, but still reasonable, we shall model a human leg that is 92.0 cm long (measured from the
Karolina [17]

Answer:

40.44 cm

Explanation:

Our starting point of the coordinates is adjusted in the hip joint.

X_{cm} = \frac{X_1 m_1 + X_2 m_2}{m_1+m_2}

Where,

X_1=23 cm Location of mass 1  

m_1=8.6kgmag of mass 1

X_2=69cmlocation of mass 2

m_2=5.25kgmag of mass 2

X_{cm}=\frac{23*8.6+69*5.25}{8.6+5.25}

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4 0
4 years ago
Find weight of 45 kg at height 800 km from earth's surface?​
Fiesta28 [93]

Answer:

<em>The weight is 348.4 N</em>

Explanation:

<u>Effect of the Altitude on the Acceleration of Gravity</u>

The effect of gravity decreases with altitude because greater altitudes mean greater distances from the Earth's center.

The practical formula to calculate the gravity as a function of the altitude h is:

{\displaystyle g_{h}=g_{0}\left({\frac {R_{\mathrm {e} }}{R_{\mathrm {e} }+h}}\right)^{2}}

Where go is the conventional gravitational acceleration = 9.80665\ m/s^2

R is the Earth's mean radius at the equator = 6,378 Km

h is the altitude.

At a height of h=800 Km, the acceleration of gravity is:

{\displaystyle g_{h}=9.80665 m/s^2\left(\frac {6,378 Km }{6,378 Km+800Km}}\right)^{2}}

Calculating:

g_h=7.74\ m/s^2

The weight is the product of the acceleration of gravity by the mass of the object, thus:

W=45\ Kg\cdot 7.74\ m/s^2=348.4\ N

The weight is 348.4 N

8 0
3 years ago
A gold fish weighing 13g has a speed of 8.8m/s. What is its Kinetic energy
sasho [114]

Answer:

0.47 J

Explanation:

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