<span>R² = 12² + 4² - 2*12*4cos45° </span>
<span>R² = 92.12 </span>
<span>R = 9.6 mph ===========> ANSWER </span>
<span>Use law of sines to find bearing </span>
<span>4/sinA = R/sin45° </span>
<span>sinA = 4sin45°/9.6 = 0.2946278...... </span>
<span>A = 17.14° </span>
<span>bearing = North 17.14° West or 342.86°</span>
The amount of heat needed to melt the block of lead is 
Explanation:
The amount of heat needed to melt a solid substance already at its melting point is given by the equation

where
m is the mass of the substance
is the specific latent heat of fusion
In this problem, we have a block of lead already at its melting point,
. Its mass is
m = 200 g = 0.2 kg
and its specific latent heat of fusion is

Therefore, the amount of heat needed for the block to completely melt is

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Answer:
yes, if you're going at 120 km and you saw the wall that late then it wouldn't me possible to decrease 12 meters in 5 seconds and not hit the wall that's only 60 meters away
Explanation:
The final speed of the cart and the bag is 2.2 m/s
Explanation:
We can solve this problem by using the law of conservation of momentum: in fact, in absence of external forces, the total momentum of the bag and the cart must be conserved before and after the collision.
Mathematically:
where:
is the mass of the bag of rice
is the initial velocity of the bag
is the mass of the cart
is the initial velocity of the cart (at rest)
is the final combined velocity of the bag and the cart
Re-arranging the equation and solving for v, we find:
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Answer:
A hypothesis
Explanation:
A hypothesis is an explanation for those facts and can expierimented on.