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Yuliya22 [10]
3 years ago
10

A gardener uses 2700 J of work to push a wheelbarrow for 60 seconds. How much power does she use?

Physics
2 answers:
Phantasy [73]3 years ago
5 0

Answer:

I think 90 w I am not sure but I think it is right

I hope it is helpful for u

Zina [86]3 years ago
3 0

Answer:

<h2><em>4</em><em>5</em><em> </em><em>W</em></h2>

<em>Sol</em><em>ution</em><em>,</em>

<em>Work</em><em>(</em><em>W</em><em>)</em><em>=</em><em>2</em><em>7</em><em>0</em><em>0</em><em> </em><em>Joule</em>

<em>Time</em><em>(</em><em>t</em><em>)</em><em>=</em><em>6</em><em>0</em><em> </em><em>Seconds</em>

<em>Power</em><em>=</em><em>?</em>

<em>Now</em><em>,</em>

<em>power =  \frac{work \: done}{time \: taken}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{2700}{60}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 45 \: \: watt</em>

<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em>.</em><em>.</em>

<em>Good</em><em> </em><em>luck</em><em> on</em><em> your</em><em> assignment</em><em>.</em><em>.</em>

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jeka94
<h3><u>Answer;</u></h3>

<u>No-</u>the equation is not balanced.

<h3><u>Explanation;</u></h3>
  • The balanced equation will be;

<em>2Al + 3NiBr2→ 2AlBr3 + 3Ni</em>

  • <em><u>According to the law of conservation of mass, the mass of reactants should always be the same as the mass of the products in a chemical equation. </u></em>
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5 0
3 years ago
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A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 130-kg laser sensor that measures the thi
umka21 [38]

Answer:T=1316.21 N

Explanation:

The tension has two components: Vertical and Horizontal. The

horizontal component is ma, the vertical component is mg. Using

Pythagoras theorem, we can find the tension as:

T=((ma)^2 (mg)^2)^(1/2)

So

T=((129*2.84)^2 (129*9.8)^2)^(1/2)

T=1316.21 N

8 0
3 years ago
Hi please please help me you’ll get points and I’ll give you brainliest
leonid [27]

Answer:

see below

Explanation:

Question 1)

57kg to ug

126\:Kg(\frac{1*10^{9}ug }{1kg} )\\\\=126(10^{9} )\\\\=126,000,000,000 ug                                  (there are 9 zeros)

Question 2)

126lbs to N

126lbs(\frac{4.45N}{1lb} )\\\\=126(4.45N)\\\\=506.7N

7 0
3 years ago
A car whose total mass is 800kg travelling with a uniform velocity of 20m/s suddenly observes a stationary dog 50m ahead on its
maxonik [38]

Answer:

The driver hits the stationery dog because the applied force is less than required force

Explanation:

Kinetic energy will be given by

KE=0.5mv^{2} where m is the mass of the vehicle and v is the speed/velocity of the vehicle.

Substituting 800 Kg for m and 20 m/s for v we obtain

KE=0.5*800*(20 m/s)^{2}=160,000

Frictional force by vehicle pads is given by

Fr=\frac {KE}{d} where d is the distance moved

Substituting 160000 for KE and 50 m for d we obtain

Fr=\frac {160000}{50}=3200 N

Therefore, the vehicle hits the dog since the required force is 3200N but the driver applied only 2000 N

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When nuclear fission occurs some mass is lost where does that mass go
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3 years ago
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