Sarah's group designed this oven and eventually melted the
chocolate, but it took a very long time. sarah suggested a design
modification: she thought they should cover the bottom of the box
with black paper and leave the aluminum foil up above. is sarah
correct? why or why not?
a)
b)
no. the top and bottom should be covered with
aluminum foil to reflect the rays of the sun
no. the bottom and sides of the box should be
covered with rolled up newspapers to insulate
the box
yes. a black bottom will absorb more heat energy
when the sunlight is reflected into the box by the
foil.
not completely. sarah is correct about the bottom. it
should be black. but the rest of the box should be
black to absorb heat energy
c)
d)

if you answer my question i will answer yours

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s