Answer:
Explanation:
Given that,
Initial speed of a car, u = 13 m/s
Final speed of a car, v = 25 m/s
Time, t = 5 s
We need to find the acceleration of the car during this 5.0 second time interval. Let a is the acceleration. It can be calculated as :
So, the acceleration of the car is .
The correct answer are
a) "The number of muscle fibers best determines how powerful a muscle will be"
b) "The more a muscle shortens, the more power it generates."
Reason :
Muscle fiber in longitudinal directions generate more power
Multipennate muscles do not produce much power because the tendon branches within muscle
.
Solution :
Energy of photon, E = 6.7 eV
E = joule
Kinetic energy,
Kinetic energy at high speeds
r - 1 = 7130
r = 7130 + 1
r = 7131
Δ = 1 - 0.99999999017
= 0.00000000933
Relative mass,
kg
Answer:
I disagree
Explanation:
I think the students claim is wrong because according to Newton's First Law an object that is in motion stays in motion unless acted upon by an unbalanced force. Which makes the students claim wrong because a object doesn't require another force to keep it moving.
Answer:
the mass of the air in the classroom = 2322 kg
Explanation:
given:
A classroom is about 3 meters high, 20 meters wide and 30 meters long.
If the density of air is 1.29 kg/m3
find:
what is the mass of the air in the classroom?
density = mass / volume
where mass (m) = 1.29 kg/m³
volume = 3m x 20m x 30m = 1800 m³
plugin values into the formula
1.29 kg/m³ = <u> mass </u>
1800 m³
mass = 1.29 kg/m³ ( 1800 m³ )
mass = 2322 kg
therefore,
the mass of the air in the classroom = 2322 kg