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3 years ago

11.) An object that is NOT accelerating could be sitting still or:

Physics

2 answers:

mart [117]3 years ago

7 0

Moving slowly is the correct answer

Aleonysh [2.5K]3 years ago

4 0

Answer:

moving slowly is the answer

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A. According to theory, the period T of a simple pendulum is T = 2????√ ???? ???? a. If ???? is measured as ???? = 1.40 ± 0.01 m

salantis [7]

Answer:

a) T = (2,375 ± 0.008) s , b) When comparing this interval with the experimental value we see that it is within the possible theoretical values.

Explanation:

a) The period of a simple pendulum is

T = 2π √ L / g

Let's calculate

T = 2π √1.40 / 9.8

T = 2.3748 s

The uncertainty of the period is

ΔT = dT / dL ΔL

ΔT = 2π ½ √g/L 1/g ΔL

ΔT = π/g √g/L ΔL

ΔT = π/9.8 √9.8/1.4 0.01

ΔT = 0.008 s

The result for the period is

T = (2,375 ± 0.008) s

b) the experimental measure was T = 2.39 s ± 0.01 s

The theoretical value is comprised in a range of [2,367, 2,387] when we approximate this measure according to the significant figures the interval remains [2,37, 2,39].

When comparing this interval with the experimental value we see that it is within the possible theoretical values.

6 0

4 years ago

What is the value of the angle of refraction of light from a crown glass slab when the angle of incidence is 50°? The slab has a

Artemon [7]

The angle of refraction is $30.3^{\circ}$

Explanation:

Refraction is a wave phenomenon that occurs when a light wave passes through the interface between two mediums. When this occurs, the speed and the direction of the light wave change.

We can find the final direction of the refracted light in this problem by applying Snell's law:

$n_i sin \theta_i = n_r sin \theta_r$

where

$n_i, n_r$ are the index of refraction in the first and second medium, respectively

$\theta_i, \theta_r$ are the angle of incidence and refraction, respectively

In this problem, we have:

$n_i = 1.00$ (the first medium is air, which has a refractive index of 1.00)

$n_r = 1.52$ (index of refraction of crown glass)

$\theta=50^{\circ}$ is the angle of incidence

Solving for $\theta_r$ , we find the angle of refraction

$\theta_r = sin^{-1}(\frac{n_i sin \theta_i}{n_r})=sin^{-1}(\frac{(1.00)(sin 50^{\circ})}{1.52})=30.3^{\circ}$

Learn more about refraction and other wave phenomena:

brainly.com/question/3183125

brainly.com/question/12370040

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7 0

3 years ago

3 a There is a thin layer of water between the blade and the ice. Suggest how this affects friction .

Gelneren [198K]

Answer:

The water acts like a lubricant therefore has a smooth motion over the ice.

8 0

3 years ago

What is the angular magnification?

guajiro [1.7K]

Answer:

the ratio of the angle subtended at the eye by the image formed by an optical instrument to that subtended at the eye by object when not viewed through the instrument.

4 0

3 years ago

Explain the mathematical equation for KVL (The voltage of a circuit through each component in that circuit is proportional to th

deff fn [24]

Explanation:

Kirchhoffs Voltage Rule, or KVL, explains that "the overall voltage throughout the circuit in any closed loop network is equal to the sum of all voltage decreases inside the same loop" which is equivalent to zero. In other words, the mathematical sum of all within the loop voltages must be equal to zero.

6 0

3 years ago