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zalisa [80]
3 years ago
9

What was the vertical component of her acceleration during push-off? the positive direction is upward?

Physics
1 answer:
gladu [14]3 years ago
5 0
<span>The answer of these two problems are : A) a = (F-W)/m = (100-500)/500/g = 9.8*500/500 = +9.8 m/sec^2 B) a1 = +9.8-g = 0</span>
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What is the cost of operating a 100 W light bulb for "4 hrs per day" for 30 days, if the cost of electricity is 6 cents kW•h
Sidana [21]

Answer:

the cost of operating the light bulb is 72 cents.

Explanation:

Given;

cost of electricity, C = 6 cents / kW.h

power of light bulb, P = 100 W

time of light power consumption, t = 4 hours per day for 30 days

total time = 4 hours x 30 = 120 hours

Power consumed by the light bulb is calculated as;

P = 100 x 120 = 12000 w.h = 12 kW.h

Cost of power consumption = 6 cents/kWh x 12 kWh

                                               = 72 cents

Therefore, the cost of operating the light bulb is 72 cents.

3 0
3 years ago
Increasing the speed of an object blank its potential energy ​
ella [17]

There is no direct connection between the speed of an object and its potential energy.  

UNLESS the object is falling, and it's GETTING its speed FROM its potential energy.  If that's what's going on, then of course if the speed increases, the object's kinetic energy increases, and that increase has to come from using up some of the potential energy.

7 0
3 years ago
The force of gravity between two objects is directly proportional to which of the following?
WINSTONCH [101]
The answer is:
D: The distance between the objects squared.

The gravitational force between two objects is proportional to their masses and inversely proportional to the square of the distance between their centers. Result: 'g' is independent of mass of object !! Hope this helped :)
7 0
3 years ago
What is the speed of the Curiosity Rover if it travels 10,000 ft. in 25 hours? *
kumpel [21]
I think it’s 250,000 ft./hr
8 0
3 years ago
Why does a pencil in a glass container filled with water appear to be bent?
Bogdan [553]

The phenomenon is called "refraction".  It's the process of
light waves bending toward a different direction when they
cross a boundary between different media ... in this case,
from water into air.

Your brain doesn't know that the light waves bent toward a
new direction when they came out of the water into the air,
so your brain locates the bottom half of the pencil just like it
ALWAYS does ... in the direction the light waves are coming FROM.

4 0
4 years ago
Read 2 more answers
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