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KatRina [158]
3 years ago
9

If a runner's power is 400 W as she runs, how much chemical

Physics
1 answer:
astraxan [27]3 years ago
5 0

Answer:

240 kJ

Explanation:

A Watt is defined as a Joule per second. 10.0 minutes, converted in seconds, are 10.0*60 =600s. At this point, we just multiply the two numbers: 400 J/s * 600.0s = 240 000.0J

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Which energy conversion takes place when a solar cell is used to light a street lamp ?
Dahasolnce [82]

Electrical energy into Light energy.

It converts the electrical energy into light energy and hence helps to light a street lamp.

3 0
3 years ago
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A transformer is used to light a lamp rated 40w, 240v from a 400v A.C supply. Calculate:
zubka84 [21]

Answer:1.81

(a) Explanation:the turn ratio= input voltage÷output voltage.

400÷220=1.81.

Don't know how to solve b part...

5 0
3 years ago
If a ball has a velocity of 18 m/s, how far does it travel in 15 seconds
Stolb23 [73]

Answer:

The answer is

<h2>270 m</h2>

Explanation:

To find the distance when given the velocity and time we use the formula

<h3>distance = velocity × time</h3>

From the question

velocity of the ball = 18 m/s

time = 15 s

So the distance is

distance = 18 × 15

We have the final answer as

<h3>270 m</h3>

Hope this helps you

7 0
3 years ago
The tundra is located _______.
Leona [35]

Answer:

d: both north and south

Explanation:

8 0
3 years ago
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You are loading a refrigerator weighing 2267 N onto a truck, using a wheeled cart. The refrigerator is raised 1.09 m to the truc
meriva

Answer:

a).

Wmin= 2471.03 J

W=1603.01 J

Explanation:

Weight, w= 2267 N

w= m*g\\W=m*g*h \\W=w*h

Minimum work 'h' is the distance the refrigerator is raised h=1.09m

W_{min}=2267 N* 1.09m\\W_{min}=2471.03 J

The motion is no frictional force so, the magnitude of the force with a angle of 45.0° is find using:

W=m*g*h'\\h'= sin(45)\\W=2267N*sin(45)\\W=1603.01 J

6 0
3 years ago
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