Answer:
Explanation:
The question is incomplete.
The equation of motion is given for a particle, where s is in meters and t is in seconds. Find the acceleration after 4.5 seconds.
s= sin2(pi)t
Acceleration = d²S/dt²
dS/dt = 2πcos2πt
d²S/dt² = -4π²sin2πt
A(t) = -4π²sin2πt
Next is to find acceleration after 4.5 seconds
A(4.5) = -4π²sin2π(4.5)
A(4.5) = -4π²sin9π
A(4.5) = -4π²sin1620
A(4.5) = -4π²(0)
A(4.5) = 0m/s²
Answer:
Satellites can gather weather data from much higher altitudes than land-based instruments can.
Answer:E
Explanation:
Given
speed of electron is v
Magnitude of magnetic field B
radius of circular motion
Work done by Magnetic field is given by
where will yield a vector perpendicular to both magnetic field and velocity vector .
will also perpendicular to displacement d so net work done will be zero
Given
m1 = 15kg
vi1 = +20 m/s
vf1 = +5 m/s
m2 = 10 kg
vi2= -15 m/s
vf2 = ?
Procedure
Conservation of momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant.
The speed of the 10kg Ball is 7.5m/s
<span>They are similar because the matter changes in its state...But they are also different because Physical changes have matter that remains the same substance but it is just in a different state and in chemical changes the matter changes completely... Hope this Helps ^-^</span>