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Olin [163]
3 years ago
12

A boy is swimming , identify the action and reaction

Physics
1 answer:
yuradex [85]3 years ago
5 0

Answer:

a person pushes water with his hands in the backward direction is action and water in turns pushes him forward due to force is reaction.

Explanation:

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If the clock runs slow and loses 15 s per day, how should you adjust the length of the pendulum?
Shkiper50 [21]

Answer:

L= 1 m,   ΔL = 0.0074 m

Explanation:

A clock is a simple pendulum with angular velocity

         w = √ g / L

Angular velocity is related to frequency and period.

         w = 2π f = 2π / T

We replace

        2π / T = √ g / L

        T = 2π √L / g

We will use the value of g = 9.8 m / s², the initial length of the pendulum, in general it is 1 m (L = 1m)

With this length the average time period is

           T = 2π √1 / 9.8

           T = 2.0 s

They indicate that the error accumulated in a day is 15 s, let's use a rule of proportions to find the error is a swing

           t = 1 day (24h / 1day) (3600s / 1h) = 86400 s

         e= Δt = 15 (2/86400) = 3.5 104 s

The time the clock measures is

           T ’= To - e

           T’= 2.0 -0.00035

           T’= 1.99965 s

Let's look for the length of the pendulum to challenge time (t ’)

           L’= T’² g / 4π²

           L’= 1.99965 2 9.8 / 4π²

           L ’= 0.9926 m

Therefore the amount that should adjust the length is

           ΔL = L - L’

           ΔL = 1.00 - 0.9926

           ΔL = 0.0074 m

8 0
4 years ago
If you and your friend EACH apply 55N of force pushing against a wall for 10 minutes. How much work
alina1380 [7]

Answer: 0 J

Explanation: there’s no movement if it’s a wall

8 0
3 years ago
A satellite is spinning at 0.01 rev/s. The moment of inertia of the satellite about the spin axis is 2000 kg · m2. Paired thrust
enyata [817]

Answer:

Explanation:

Angular velocity of satellite

= 2π x .01

= .02 π rad /s

Initial angular momentum

Moment of inertia x angular velocity

= 2000 x .02 π

= 125.6 unit

Linear impulse produced by each thruster

= 15 N.s

Angular impulse

= 15 x 1.5 = 22.5 unit

Total angular impulse in 30 pulses

= 22.5 x 2 x 30

1350

This angular impulse will add total angular momentum of

1350 unit

So total angular momentum after 30 pulses

= 1350 + 22.5

= 1372.5 unit

So  final angular  velocity

= final  angular momentum / moment of inertia

= 1372.5 / 2000

=   0 .686 rad /s

3 0
3 years ago
Many scientists believe that the current period of global warming is related to increased levels of what?
tia_tia [17]
<span>In the question, "Many scientists believe that the current period of global warming is related to increased levels of what?" The correct answer is carbon dioxide. Global warming is a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants."</span>
8 0
3 years ago
How strong is the electric field between two parallel plates 5.8 mm apart if the potential difference between them is 200 V?
crimeas [40]

Answer: Electric field is given as

E = V/d

E = 220 v / 0.0056m

E = 39285.71 v/m

Or

E = 39285.71 N/C

Explanation: Therefore electric field is 39285.71 V/m

7 0
3 years ago
Read 2 more answers
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