Negative because the graph goes down
Answer:
F = 22.75 lb
μ₁ = 0.15
Explanation:
The smallest force required to move the dresser must be equal to the force of friction between the man and the dresser. Therefore,
F = μR
F = μW
where,
F = Smallest force needed to move dresser = ?
μ = coefficient of static friction = 0.25
W = Weight of dresser = 91 lb
Therefore,
F = (0.25)(91 lb)
<u>F = 22.75 lb</u>
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Now, for the coefficient of static friction between shoes and floor, we use the same formula but with the mas of the man:
F = μ₁W₁
where,
μ₁ = coefficient of static friction between shoes and floor
W₁ = Weight of man = 151 lb
Therefore,
22.75 lb = μ₁ (151 lb)
μ₁ = 22.75 lb/151 lb
<u>μ₁ = 0.15</u>
Answer:
Explanation:
We are given that
r=2 in when t=4 s
We have to find the rate of change of radius.
We know that
Volume of sphere=
Differentiate w.r.t t
Substitute the values
Answer:
Supongo que quieres encontrar las relaciones que te permiten cambiar las escalas de temperatura.
Las 3 escalas de temperatura son:
°C = grado Celcius.
°F = grado Farenheit.
K = grado Kelvin.
Empezamos con °C, pues es la mas conocida.
La diferencia entre consecutivos grados es la misma en la escala Kelvin que en la escala Celcius, pero la escala Kelvin esta definida de tal forma que el cero Kelvin representa la ausencia absoluta de temperatura, mientras que en Celcius podemos tener temperaturas menores a 0 grados.
La transformación entre Celcius y Kelvin es:
x °C = (x + 273.15) K
Es decir, agarramos nuestra temperatura en °C, y le sumamos 273.15 grados.
La transformación entre Celcius y Farenheit es:
x °C = ((x*9/5) + 32) °F
Y la faltante, va a ser de Kelvin a Farenheit, que es:
x K = ( ( (x - 273.15)*9/5) + 32) °F
A vector has a size and a direction. The size is called the magnitude of the vector.
