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3 years ago

13

The refrigeration unit on an ice cream truck is rated at 35,500 Btu/hr. What is the amount of heat removed if is operates for 2.

75 hours?

1 answer:

Elza [17]3 years ago

4 0

(35,500 BTU/hr) x (2.75 hr)

= (35,500 x 2.75) BTU

= 97,625 BTU

IF it runs at its full rated capacity for the whole 2.75 hours.

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3 years ago

.A box falls to the ground from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 m to

Romashka-Z-Leto [24]

Answer:

t = 3 seconds

Explanation:

Given that,

Initial speed, u = 30 m/s

Final speed, v = 0

It slides 45 m to rest.it take the box to come to rest

We need to find how long it take the box to come to rest.

Let a be the acceleration and t is time.

$v^2-u^2=2ad\\\\a=\dfrac{v^2-u^2}{2d}\\\\a=\dfrac{(30)^2-u^2}{2(45)}\\\\=10\ m/s^2$

Now finding time.

$t=\dfrac{v-u}{a}\\\\t=\dfrac{30-0}{10}\\\\t=3\ s$

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