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diamong [38]
3 years ago
6

When bones are moved by muscles due to

Physics
2 answers:
ryzh [129]3 years ago
7 0
A is the correct answer
77julia77 [94]3 years ago
6 0
Respiratory and circulatory
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A ball resting on a roof 75 meters high has 1000 Joules of gravitational potential energy. Calculate the mass of the ball. (SHOW
Arturiano [62]

Answer:

The mass of the ball is 1.360 kilograms.

Explanation:

By Work-Energy Theorem, gravitational potential energy (U), in joules, is the product of weight of the ball (W), in newtons, and height (h), in meters. Please notice that weight is the product of the mass of the ball (m) and gravitational acceleration (g), in meters per square second. Then, the formula for the mass of the ball is:

m = \frac{U}{g\cdot h} (1)

If we know that U = 1000\,J, g = 9.807\,\frac{m}{s^{2}} and h = 75\,m, then the mass of the ball is:

m = \frac{U}{g\cdot h}

m = 1.360\,kg

The mass of the ball is 1.360 kilograms.

8 0
2 years ago
If a ball goes at 20 miles per hour what's the velocity
stellarik [79]
The velocity is

  (20 miles per hour) in the direction (that the ball is traveling this instant) .

If the speed OR direction of the ball changes, then the velocity has changed.
8 0
3 years ago
Unlike addition polymers, condensation polymers form from _____.
AysviL [449]
Both end of the chain

5 0
3 years ago
Read 2 more answers
A 60.0 kg soccer player kicks a 0.4000 kg stationary soccer ball with 6.25 N of force. How fast does the soccer ball accelerate,
frozen [14]
F = ma
6.25 N = 0.4 kg · a
a = (6.25/0.4) m/s²      since N=kg·m/s²
a = 15.625 m/s² 

The answer is c) 15.6 m/s²
(Note that the mass of the soccer player is irrelevant.)
8 0
3 years ago
If force remains constant and acceleration decreases what must happen to the mass
blondinia [14]

That can only be happening if the mass mysteriously increased somehow.  I'd like to know how in the world THAT happened.

4 0
3 years ago
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