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3 years ago

13

Which activity best reflects a muscle movement working against gravity? a lifting the torso during a sit up b lowering the body

during a pushup c doing a squat d swimming?

2 answers:

alexdok [17]3 years ago

6 0

The answer is c) doing a squat.

Hope this helps !

Photon

Ivan3 years ago

4 0

<span>c doing a squat

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</span>

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A cylindrical metal bar of diameter 14cm and length 484 cm is to be melted to make a metalic cube.if one side of the box is 220m

asambeis [7]

The number of boxes were produced willl be 7.57.n stands for the no of boxes.

<h3>What is volume?</h3>

The term “volume” refers to the amount of three-dimensional space taken up by an item or a closed surface. It is denoted by V and its SI unit is in cubic cm.

The volume of the cylindrical metal bar;

V₁=πr²h

V₁=3.4 × 7² × 484 cm

V₁=80,634.4 cm³

The one side of the box is,220mm(22 cm)

V₂ = a³

V₂ = (22)³

V₂ = 10,648 cm³

The no of boxes is found as;

n = V₁/V₂

n=80,634.4 cm³/10,648 cm³

n=7.57

Hence, the number of boxes were produced willl be 7.57

To learn more about the volume, refer to brainly.com/question/1578538

#SPJ2

5 0

2 years ago

A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm.A gro

spin [16.1K]

Answer:

the foiley like color doesn't absorb the heat it bounces off of it. it would be much better to have a black blanket

7 0

3 years ago

Which of the following has the largest m/mentum?

ASHA 777 [7]

A: The total building of Campbell high school, including the trailers and the construction area

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3 years ago

Can somebody help me with this quiz please

mezya [45]

Sure what do u need help with

4 0

3 years ago

A satellite orbits a planet of unknown mass in a circular orbit of radius 2.3 x 104 km. The gravitational force on the satellite

sladkih [1.3K]

Answer:

The kinetic energy is $KE = 7.59 *10^{10} \ J$

Explanation:

From the question we are told that

The radius of the orbit is $r = 2.3 *10^{4} \ km = 2.3 *10^{7} \ m$

The gravitational force is $F_g = 6600 \ N$

The kinetic energy of the satellite is mathematically represented as

$KE = \frac{1}{2} * mv^2$

where v is the speed of the satellite which is mathematically represented as

$v = \sqrt{\frac{G M}{r^2} }$

=> $v^2 = \frac{GM }{r}$

substituting this into the equation

$KE = \frac{ 1}{2} *\frac{GMm}{r}$

Now the gravitational force of the planet is mathematically represented as

$F_g = \frac{GMm}{r^2}$

Where M is the mass of the planet and m is the mass of the satellite

Now looking at the formula for KE we see that we can represent it as

$KE = \frac{ 1}{2} *[\frac{GMm}{r^2}] * r$

=> $KE = \frac{ 1}{2} *F_g * r$

substituting values

$KE = \frac{ 1}{2} *6600 * 2.3*10^{7}$

$KE = 7.59 *10^{10} \ J$

7 0

3 years ago