Answer:
The length of the bridge during the hottest part of summer is
Explanation:
From the question we are told that
The length of the steel bridge is
The temperature for this length is
The temperature at summer
The coefficient of linear expansion is
Generally the change in length of the steel bridge is mathematically represented as
Substituting value
The length of the bridge in summer is mathematically evaluated as
Substituting values
Answer:
0.48 s
Explanation:
The vertical position of the ball at time t is given by:
where
h = 3 m is the initial height
u = 0.4 m/s is the initial velocity
g = 24.5 m/s^2 is the acceleration of gravity on the surface of Jupiter
The negative signs are due to the fact that the direction of the initial velocity and of the acceleration are downward
The ball reaches the surface at time t such that y(t)=0, so:
Substituting values,
Solving the second-order equation, we find:
which gives two solutions:
t = 0.48 s
t = -0.51 s
We discard the second one since it is negative, so the ball reaches the surface after 0.48 s.
Answer:
2y
Explanation:
Electric field in terms of Electric potential is given as:
E = dV/dr(x, y, z)
Where r(x, y, z) = position in x, y, z plane
The y component of the Electric field will be:
Ey = -dV/dy
Given that
V = 2x - y² - cos(z)
dV/dy = -2y
=> E = - (-2y)
E = 2y
Answer:
Alburt Bandura
Explanation:
Rosalind has learned to be impulsive and seldom waits for her turn when playing with other children, this trait she has learned from her father, who is also an impulsive man.
The theorist who would most likely suggest that Rosalind has learned to be impulsive from watching her father is Alburt Bandura. Alburt in his famous Bebo Doll experiment confirmed that children learn from the adults behavior in their life.