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I am Lyosha [343]
3 years ago
12

A person's center of mass is easily found by having the person lie on a reaction board. A horizontal, 2.1-m-long, 6.6 kg reactio

n board is supported only at the ends, with one end resting on a scale and the other on a pivot. A 65 kg woman lies on the reaction board with her feet over the pivot. The scale reads 26 kg .Assume that the woman doesn't move and a position of her center of mass doesn't change.What is the distance from the woman's feet to her center of mass?
Physics
1 answer:
MrRissso [65]3 years ago
5 0
Answer is x hopefully this helps your stupid head
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If you were to triple the size of the Earth (R = 3R⊕) and double the mass of the Earth (M = 2M⊕), how much would it change the g
EastWind [94]

Answer:

Decreased by a factor of 4.5

Explanation:

"We have Newton formula for attraction force between 2 objects with mass and a distance between them:

F_G = G\frac{M_1M_2}{R^2}

where G =6.67408 × 10^{-11} m^3/kgs^2 is the gravitational constant on Earth. M_1, M_2 are the masses of the object and Earth itself. and R distance between, or the Earth radius.

So when R is tripled and mass is doubled, we have the following ratio of the new gravity over the old ones:

\frac{F_G}{f_g} = \frac{G\frac{M_1M_2}{R^2}}{G\frac{M_1m_2}{r^2}}

\frac{F_G}{f_g} = \frac{\frac{M_2}{R^2}}{\frac{m_2}{r^2}}

\frac{F_G}{f_g} = \frac{M_2}{R^2}\frac{r^2}{m_2}

\frac{F_G}{f_g} = \frac{M_2}{m_2}(\frac{r}{R})^2

Since M_2 = 2m_2 and r = R/3

\frac{F_G}{f_g} = \frac{2}{3^2} = 2/9 = 1/4.5

So gravity would have been decreased by a factor of 4.5  

8 0
3 years ago
1 pts
mezya [45]

Answer:

46 dgres is the answer

Explanation:

<em>plz</em><em> </em><em>mark</em><em> </em><em>me</em><em> brainliest</em><em> plz</em><em> Plz</em>

4 0
2 years ago
Give an example of intense aerobics activity. Prompt must be accurate. ​
Lubov Fominskaja [6]

Answer:

Explanation:

An example of an intense aerobic activity would be running/ sprinting sprinting targets six specific muscle groups: hamstrings, quadriceps, glutes, hips, abdominals and calves. Sprinting is a total body workout featuring short, high-intensity repetitions and long, easy recoveries.

7 0
2 years ago
A seismographic station receives S and P waves from an earthquake, separated in time by 17.8 s. Assume the waves have traveled o
Georgia [21]

Answer:

D = 230.2 Km

Explanation:

let distance between seismograph and focus of quake is D

From time distance formula we  can calculate the time taken by the S wave

T_1 =\frac{D}{4.5}

From time distance formula we  can calculate the time taken by the P wave

T_2 =\frac{D}{6.90}

It is given in equation both waves are seperated from each other by 17.8 sec

so we have

T_1 - T_2 = 17.8sec

Putting both time value to get distance value

\frac{D}{4.5} - \frac{D}{6.90} = 17.8

D = 230.2 Km

8 0
3 years ago
What is an example of a series circuit
belka [17]

Answer:

Explanation

The most famous and common example is Christmas tree lights. You can't tell easily by looking at them whether they are in series or parallel. But you sure know the difference when one of them burns out. When that happens, the whole string goes dead. No matter what you do (other than find out which bulb burned out) will not fix the problem.

Another example is anything that is temperature controlled. For example a furnace is controlled by a thermostat. When the room temperature reaches a certain point, the thermostat is constructed in a certain way so that it forms an open circuit and no current can flow through it. The furnace motor turns off and the furnace stops pumping hot air into a room.

8 0
2 years ago
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