When the sun's rays strike Earth's surface near the equator, the incoming solar radiation is more direct (nearly perpendicular or closer to a 90˚ angle). Therefore, the solar radiation is concentrated over a smaller surface area, causing warmer temperatures.
Answer:
The image result of an object reflected by a convex mirror is typically virtual, upright, and smaller. Discover how moving the object farther away from the mirror's surface affects the size of the virtual image formed behind the mirror
Explanation:
Answer:
The movement of continents changes wind patterns and ocean currents.
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Explanation:
Answer:
0.3 m
Explanation:
Initially, the package has both gravitational potential energy and kinetic energy. The spring has elastic energy. After the package is brought to rest, all the energy is stored in the spring.
Initial energy = final energy
mgh + ½ mv² + ½ kx₁² = ½ kx₂²
Given:
m = 50 kg
g = 9.8 m/s²
h = 8 sin 20º m
v = 2 m/s
k = 30000 N/m
x₁ = 0.05 m
(50)(9.8)(8 sin 20) + ½ (50)(2)² + ½ (30000)(0.05)² = ½ (30000)x₂²
x₂ ≈ 0.314 m
So the spring is compressed 0.314 m from it's natural length. However, we're asked to find the additional deformation from the original 50mm.
x₂ − x₁
0.314 m − 0.05 m
0.264 m
Rounding to 1 sig-fig, the spring is compressed an additional 0.3 meters.
Explanation:
1- El primer paso para calcular la fuerza del brazo en el punto medio de la excavadora para levantar la tierra, es averiguar dónde está el fulcro, que en este caso está en las manos.
2- El segundo paso es calcular el brazo de potencia, al que llamaremos Bp, y el brazo de resistencia, que estará representado por Br.
Si Bp es igual a la distancia de la potencia al fulcro, Bp = 60cm
y si Br es igual a la distancia desde la resistencia al fulcro, entonces
Br = 40 + 60 = 100cm
3- Ahora aplicamos la fórmula de la ley de la palanca. Nosotros
piden que se aplique la fuerza en manos de
en el medio, es decir, la potencia P. La fórmula sería:
Y en el tercer paso, aplicaremos la fórmula de la ley de la palanca, que es:
P = R x Br / Bp
P = 8 x 100/60
P = 13,33 Kgf
<u>Entonces la respuesta final es:</u>
P = 13,33 Kgf
