Answer:
Acosθ
Explanation:
The x-component of a vector is defined as :
Magnitude * cosine of the angle
Maginitude * cosθ
The magnitude is represented as A
Hence, horizontal, x - component of the vector is :
Acosθ
Furthermore,
The y-component is taken as the sin of the of the angle multiplied by the magnitude
Vertical, y component : Asinθ
Answer:
E.) conservation of angular momentum
Explanation:
The angular momentum is defined as:
x
where is the radius of the star,
is the mass and
the angular velocity.
and angular momentum is an amount that is conserved, so the angular momentum before the star is compressed must be equal to the angular momentum after the star was compressed:
x
x
the second radius is smaller than the first radius, since the star shrinked, the second angular velocity must be greater that the first.
In other words, the angular velicity increases as the star shrinks because of the conservation of angular momentum.
Answer:
Q = 2687130 J
Explanation:
m = mass of block of ice = 5 kg
= Initial temperature of ice block = - 27 °C
= final temperature of water = 35 °C
= specific heat of ice = 2108 J/(Kg °C)
= Latent heat of fusion of ice = 334000 J/kg
= specific heat of water = 4186 J/(Kg °C)
Heat added is given as