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4 years ago

Matter is anything that has

Physics

1 answer:

Svetlanka [38]4 years ago

8 0

Answer:

Space

Explanation:

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Calcula el peso de una mesaven la tierra cuya masa es de 60 kg

blsea [12.9K]

Answer:

W = 588 N

Explanation:

The given question is ,"calculate the weight of a table on the earth whose mass is 60 kg"

The mass of the table, m = 60 kg

We need to find the weight of a table on the earth.

The weight of an object is given by :

W = mg

Where

g is acceleration due to gravity

W = 60 kg × 9.8 m/s²

W = 588 N

Hence, the weight of the table is 588 N.

5 0

3 years ago

When switched on, the grinding machine accelerates from rest to its operating speed of 3550 rev/min in 10 seconds. When switched

Paraphin [41]

Answer:

During start total turns

$N_1 = 296 turn$

After half of the time total turns

$N_3 = \frac{29.6 + 0}{2}(5) = 74 turns$

Total number of turns during it stop

$N_2 = \frac{59.17 + 0}{2}(31) = 917 turn$

After half of the time total turns

$N_4 = 688 turns$

Explanation:

Initially the machine is at rest and then starts rotating with speed 3550 rev/min

now we will have

$f = \frac{3550}{60} = 59.17 rev/s$

now we know that it took 10 s to reach the speed

so angular acceleration is given as

$\alpha = \frac{\omega_f - \omega_i}{t}$

$\alpha = \frac{59.17- 0}{10} = 5.917 rev/s^2$

now it stops in 31 s so the angular deceleration is given as

$\alpha_2 = -\frac{59.17}{31} = -1.91 rev/s^2$

now initially number of turn to reach the given speed

$N_1 = \frac{59.17 + 0}{2}(10) = 296 turn$

number of turns during it stop

$N_2 = \frac{59.17 + 0}{2}(31) = 917 turn$

Now during startup speed after t = 5 s is given as

$\omega_1 = (5.917)(5) = 29.6 rev/s$

$N_3 = \frac{29.6 + 0}{2}(5) = 74 turns$

now during it stop the speed after half the time is given as

$\omega_2 = 59.17 - (1.91)(15.5) = 29.56 rev/s$

now the number of turns is given as

$N_4 = \frac{59.17 + 29.56}{2}(15.5)$

$N_4 = 688 turns$

5 0

3 years ago

Opposite chargers and like charges

cluponka [151]

Opposite charges attract
Like charges repel

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4 years ago

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Need help ASAP please help

n200080 [17]

Answer:

.....

Explanation:

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3 years ago

Why is it very difficult for astronomers to find objects like planets and asteroids?

mezya [45]

It is difficult for astronomers to find object like planets and asteroids because it takes a lot of time to verify the objects locations and what surrounds a certain object in order to prove and be precise of its location

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4 years ago