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klio [65]
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?
Physics
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


-------------------
</span>
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Describe how transverse waves can be produced by a rope. Then describe hiw pieces of the rope move as waves pass.
Oduvanchick [21]
We did this experiment before, when the rope moves, it represents the waves passing through in from the level of intensity. I hope this is a good answer.
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a wall switch is connected to a wall outlet. A lamp is plugged into the same outlet. You turn the switch on, but the lamp stays
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1:   only half  the outlet is switched  and the lamp is in the  other half
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3 years ago
A 66-kg base runner begins his slide into second base when he is moving at a speed of 3.4 m/s. The coefficient of friction betwe
Helen [10]

Answer:

a ) = 381.48 J

b )=  84.25 cm

Explanation:

Kinetic energy of the runner

= 1/2 m v²

= .5 x 66 x 3.4²

= 381.48 J

The final kinetic energy of the runner is zero .

Loss of mechanical energy

= 381.48 J

This  loss in  mechanical energy is due to action of frictional force .

b )

Let s be the distance of slide

deceleration due to frictional force

= μmg/m

.7 x 66 x 9.8 / 66

a = - 6.86 m s⁻¹

v² = u² - 2 a s

0 = 3.4² - 2x6.86 s

s = 3.4² / 2x6.86

= .8425 m

84.25 cm

5 0
3 years ago
A ball is thrown directly upward into the air. The graph below shows the vertical position of the ball with respect to time
Alexxx [7]

.Explanation:

.......................................................

5 0
3 years ago
An irregular shape object has a mass of 19 oz. A graduated cylinder with and initial volume of 33.9 mL. After the object was dro
madreJ [45]

Explanation:

m = 19 oz × (28.3 g/1 oz) = 537.7 g

V = 92.8 mL

\rho = \dfrac{m}{V}= \dfrac{537.7\:g}{92.8\:mL} = 5.79\:\frac{g}{mL}

7 0
3 years ago
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