Explanation:
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. To students of electronics, Ohm's Law (E = IR)
Pregunta completa:
Un barco va a una velocidad de 45 ml/h, luego el capitán ordena acelerar hasta que la velocidad hasta que la velocidad sea de 60 mll/h. si la operación dura 30 minutos.
A cual fue la aceleracion?
B qué distancia recorre?
Responder:
30 millas / hora
26.25 mi
Explicación:
Dado que :
Velocidad inicial, u = 45 mi / hr
Velocidad final, v = 60 mi / hr
Tiempo, t = 30 minutos = 30/60 = 0,5 h
Aceleración, a = cambio de velocidad con el tiempo;
a = (v - u) / t
a = (60 - 45) / 0,5
a = 15 / 0,5
a = 30 millas / h²
Recorrido de distancia, S
S = ut + 0.5at²
S = 45 (0,5) + 0,5 (30) (0,5²)
S = 22,5 + 3,75
S = 26,25 millas
Answer:
yes
Explanation:
it can end up stressing you out, causing a fight or argument
Answer:
C. zero for both
Explanation:
In case of solid metal sphere , when it is given any charge , all the charges are transferred on the surface and within surface no charge exists . In case of hollow metal sphere , all charges reside on surface . In this way , in both solid and hollow sphere , all charge reside on the surface and no charge resides inside it . Hence due to absence of any charge inside , there is no electric field inside the sphere in both the cases .
Hence in both the case electric field is zero .
option C is correct .
Answer:
58.4 W
Explanation:
The speed of the lawnmower is constant: this means that its acceleration is zero, so the net force on it is zero.
The equation of the forces along the two directions therefore are:
- Perpendicular to the floor: 
- Parallel to the floor: 
where
F is the push of the gardener
R is the normal reaction
m = 20 kg is the mass
g = 9.8 m/s^2 is the acceleration of gravity
is the coefficient of friction
Solving for R,
Substituting into the other equation,
And the power he must supply therefore is the product of this force and the speed:
