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Blababa [14]
3 years ago
11

A 74.0-kg man stands on a bathroom scale inside an elevator.(a) The elevator accelerates upward from rest at a rate of 1.10 m/s2

for t1 seconds. What does the scale read during this time interval
Physics
1 answer:
____ [38]3 years ago
8 0

Answer:

806.6 N

Explanation:

Given that :

Mass (m) = 74 kg

Acceleration due to gravity (g) = 9.8 m/s²

Acceleration during interval t1 = 1.10 m/s²

Using the relation :

Normal reaction = Mass (g + acceleration at interval t1)

Normal reaction = 74(9.8 + 1.10)

Normal reaction = 74(10.9)

Normal reaction = 806.6 N

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Classify the following situations as involving balanced or unbalanced forces.
Murrr4er [49]

Answer:

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Explanation:

12121212 i am jj and i am 8

5 0
3 years ago
Lily took 6 hours to complete a journey at an average speed of 58 km/h. For the first 4 hours, she travelled at an average speed
disa [49]

Answer:

92 km

Explanation:

Total distance = 6 x 58 = 348 km

Distance travelled in first 4 hours

= 4 x 64

= 256 km

Distance for rest of journey = 348 - 256 = 92 km

3 0
3 years ago
Select all the correct answers.
Andre45 [30]

Yo sup??

the 1st, 3rs and 4th statement are true because electromagnetic waves can travel large distances and electromagnetic waves are visible (only 400-700 nm wavelenght)

Hope this helps

8 0
4 years ago
A graduate student is trying to follow the weather on Jupiter for her PhD thesis. To see the big weather patterns in the upper a
DaniilM [7]

Answer: large reflector located in orbit above the Earth's atmosphere

Explanation:

Since the student wants to see the big weather patterns in the upper atmosphere of the planet, and she will therefore need to have excellent resolution, the type of telescope that is ideal for her to use is a large reflector located in orbit above the Earth's atmosphere.

It should be noted that the refractor or a radio telescope isn't ideal in this situation as they will not capture the bug weather pattern and doesn't have an excellent resolution like the large reflector.

5 0
3 years ago
A piano of mass 852 kg is lifted to a height of 3.5 m. How much gravitational potential energy is added to the piano? Accelerati
slega [8]

Answer:

29223.6J

Explanation:

Given parameters:

Mass of Piano = 852kg

Height of lifting  = 3.5m

Unknown:

Gravitational potential energy  = ?

Solution:

The gravitational potential energy of a body can be expressed as the energy due to the position of a body;

  G.P.E  = mgh

m is the mass

g is the acceleration due to gravity

h is the height

 Now insert the given parameters and solve;

   G.P.E  = 852 x 9.8 x 3.5 = 29223.6J

6 0
3 years ago
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