Answer:
Light rays that come from a source such as the sun reflect off items and enter our eye. ... While black objects absorb the energy from all colors and become hot, the objects gradually release some of that energy back into the air around it
Explanation:
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Answer:
A. El volumen
B. La densidad.
Explanation:
A derived quantity is defined as one that has to be calculated by using two or more other measurements.
Volume is a derived quantity because it requires one to use different measurements to determine it. For instance, in the case of a cube, the length, width and height of the cube are all needed to calculate volume.
Density is also a derived quantity because it needs both volume and mass for it to be calculated.
The initial speed of the ball is 5 m/s
Explanation:
We can solve the problem by using the law of conservation of momentum: in absence of external forces, the total momentum of the skater + ball system must be conserved. So we can write:
where:
m = 5 kg is the mass of the ball
u is the initial velocity of the ball
M = 45 kg is the mass of the ice skater
V = 0.5 m/s is the final velocity of the skater+ball together
Solving for u, we can find the initial velocity of the ball:
Learn more about momentum:
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Answer:
33.5
Explanation:
The given expression is;
2134211 - 12431 - 24143x = 1312431
To solve this problem, simplify the similar terms;
2121780 - 24143x = 1312431
- 24143x = 1312431 - 2121780
- 24143x = -809349
divide both sides of the expression by -24143;
x = 33.5
They are made from hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals.