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Ivenika [448]
2 years ago
11

the power rating of an electric lawn mower is 2200 watts. if the lawn mower was used for 30 mins, and 650 Newtons of force was u

sed, how much distance was covered?
Physics
1 answer:
Tasya [4]2 years ago
4 0

Answer:

Calculate the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m ... A boy on a bicycle drags a wagon full of newspapers at 0.80 m/s for 30 min ... A power mower does 9.00 x 105 J of work in 0.500 h. ... p: W 2200ch: w will320,000 T/ ... How much electrical energy (in kilowatt hours) would a 60.0 W light bulb use in ..

Explanation:

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klio [65]

Answer:

Explanation: Decreasing in velocity

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3 years ago
3. What methods are you using to test this (or each) hypothesis?. ​
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my method is guessing it works 50% of the time :)

Explanation:

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In the symbol 4/2He the subscript 4 is the _____for helium and 2 is the subscript for helium
Svet_ta [14]
^{4}_{2}}He
The 4 signifies the atomic weight, and the 2 subscribes the element's atomic number(aka the number of protons in the atom).
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3 years ago
Calculate the momentum of a 1200kg car with a velocity of 25m/s
timurjin [86]
Momentum = mass x velocity
                    = (1200)(25)
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hope this helps :)


4 0
3 years ago
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The uniform circular motion of a space station can be used to create artificial gravity. This can be done by adjusting the angul
DENIUS [597]

Answer:

The acceleration at the astronaut's head decreases.

Explanation:

Since the centripetal acceleration equals acceleration due to gravity,

a = g = GM/R². since a changes infinitesimally from his foot to his head, we differentiate a with respect to r to get da/dr = -2GM/R³.

So, da, the change in acceleration = -2GMdR/R³ = -2gdR/R = -2 × 9.8/6.4 × 10⁶ m =  -3.0625 × 10⁻⁶dR m/s².

Since dR = height of astronaut = 1.80 m, da = -3.0625 × 10⁻⁶ × 1.8 = -5.5125 × 10⁻⁶ m/s².

So the acceleration at the astronaut's head is g + da = 9.8 - 0.0000055125 = 9.7999944875 m/s².

So the acceleration at the astronaut's head decreases.

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3 years ago
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