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alisha [4.7K]
3 years ago
7

A child on a playground swing makes a complete to-and-fro swing each two seconds. the frequency of the swing is

Physics
1 answer:
Allisa [31]3 years ago
7 0
0.5 swings per second (0.5 swings/sec if you want it shorter)
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The period T of a simple pendulum is expressed by: √ where ‘l' is the length of the pendulum and ‘g' is the acceleration due to
OlgaM077 [116]

Answer:

T = T

Explanation:

The period of a simple pendulum is given by the formula

                           t = 2\pi \sqrt{\frac{l}{g} }

Where

                         l - length of the pendulum

                         g - acceleration due to gravity

The dimension of the physical quantities are given by,

                                   t  - T

                                   l - L

                                   g - m/s² - LT⁻²

Substituting in the above equation,

                                T = 2π √(L / LT⁻²)

Considering only the dimensional units in the equation

                                 T = √(L / LT⁻²)

                                  T = T

This shows that the formula for a simple pendulum is dimensionally consistent, T = T

3 0
3 years ago
A charge −1.3 × 10−5 C is fixed on the x-axis at 7 m, and a charge 1 × 10−5 C is fixed on the y-axis at 4 m. Calculate the magni
wariber [46]

Answer:

6104 N/C.

Explanation:

Given:

k = 8.99 × 10^9 Nm2/C^2

Qx = 1.3 × 10^-5 C

rx = 7 m

Qy = 1 × 10−5 C

ry = 4 m

E = F/Q

= kQ/r^2

Ex = (8.99 × 10^9 × 1.3 × 10^−5) ÷ 7^2

= 2385.1 N/C.

Ey = (8.99 × 10^9 × 1.0 × 10^−5) ÷ 4^2

= 5618.75 N/C

Eo = sqrt(Ex^2 + Ey^2)

= sqrt(3.157 × 10^7 + 5.69 × 10^6)

= 6104 N/C.

5 0
3 years ago
Einstein's equivalence principle says that __________. Einstein's equivalence principle says that __________. everyone measures
ad-work [718]

Answer:

Einstein's equivalence principle says that __________.

the effects of gravity are exactly equivalent to the effects of acceleration

Explanation:

The equivalence principle is one of the fundamental laws of physics, as enunciated by Einstein.  It categorically states that the gravitational and inertial forces are of a similar nature.  In physics, a gravitational acceleration is the acceleration of an object in a free fall within a space.  The importance of Einstein's Equivalence Principle is explained by his theory of general relativity.  This theory states that mass is the same, whether inertial or gravitational.

4 0
3 years ago
What type of UTP cabling is used in building open-air returns to reduce the amount of toxic components emitted into the air if a
Lana71 [14]

Answer:

Plenum cabling

Explanation

As the plenum cabling are fire resistent so it will not cause the toxic components in case of fire.

3 0
3 years ago
GIVING BRAINLIEST PLEASE HELP!!
Degger [83]
D. and it’s not 23 points it’s 12
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