Answer:
1920s and 1930s,
Explanation:
it's worth reiterating that helmets were not mandatory. That wouldn't happen until 1943. During the 1920s and 1930s, variations of the leather helmet appeared, but in 1939, the game changed –or at least became safer– when John T. Riddel introduced the first plastic helmet
<span>If a person does not have sufficient knowledge for designing an effective exercise program, it is likely this person will abandon it.
True</span>
The multi-store model of memory is a conceptual idea about how memory in our species works.
In short, the multi-store model of memory proposes three different types of memory - Sensory memory; very short, few second long stimulus retainment of what we see and what we're actually attentive towards. This is then forwarded to what we call short-term memory where memory is being stored for a bit longer. With information we're storing in short-term memory we then transfer it to the so called long-term memory where supposedly it can stay for very long.
Answer:
<em>la velocidad del auto es 15.75 m/s</em>
Explanation:
Potencia entregada a las ruedas P = 60 kW = 60000 W
masa del automóvil m = 1500 kg
ángulo de inclinación ∅ = 15°
velocidad del automóvil V =?
peso del automóvil W = mg
g = aceleración debido a la gravedad = 9.81 m/s^s
peso W = 1500 x 9.81 = 14715 N
Para acelerar el plano de inclinación, usamos la fórmula
potencia = (peso del automóvil W) x (velocidad del automóvil V) x sin∅
60000 = 14715 x V x sin 15°
60000 = 3808.52V
velocidad V = 60000 ÷ 3808.52 = <em>15.75 m/s</em>
B) a dime-sized, painless slre call a chancre
