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labwork [276]
4 years ago
11

What are precautions in a simple pendulum experiment ​

Physics
1 answer:
monitta4 years ago
6 0

Explanation:

1. draught

2. Parallax error

3. angle if displacement

4. air resistance or any form of obstruction

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Answer:

gravitational potential energy

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Set up a parallel circuit with three resistors. Set up the battery to be 9 V, one resistor at 10 Ohms, the other at 21 Ohms, and
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In a parallel circuit, the equivalent resistance is the reciprocal of (the sum of the individual reciprocals).

1/R = 1/10 + 1/21 + 1/13

1/R = 0.225 mhos

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The total current out of the battery is

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I = 2.02 Amperes

As the total current leaves the battery, it splits into 3 paths, and each resistor gets part of it. The 10ohm resistor gets the most current; the 21ohm resistor gets the least current. After flowing through the resistors, the 3 currents join and add up to 2.02 Amperes again, and the same current returns to the battery.

Each resistor has the same 9v of EMF across it.

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3 years ago
Metals can be described as shiny while nonmetals can be described as dull. What physical property do these terms describe? A) co
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8 0
3 years ago
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One kind of baseball pitching machine works by rotating light and stiff rigid rod about a horizontal axis until the ball is movi
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Answer:

(a). The ball's centripetal acceleration is 16.17\times10^{2}\ m/s^2

(b). The magnitude of the net force is 232.9 N.

Explanation:

Given that,

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Speed = 81 mph = 36.2 m/s

Distance = 81 cm

(a). We need top calculate the ball's centripetal acceleration just before it is released

Using formula of centripetal acceleration

a=\dfrac{v^2}{r}

Where, v = speed

r  = radius

Put the value into the formula

a=\dfrac{(36.2)^2}{81\times10^{-2}}

a=1617.82\ m/s^2

a=16.17\times10^{2}\ m/s^2

(b). We need to calculate the magnitude of the net force that is acting on the ball just before it is released

Using formula of force

F=\dfrac{mv^2}{r}

Put the value into the formula

F=\dfrac{144\times10^{-3}\times(36.2)^2}{81\times10^{-2}}

F=232.9\ N

Hence, (a). The ball's centripetal acceleration is 16.17\times10^{2}\ m/s^2

(b). The magnitude of the net force is 232.9 N.

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According to the kinetic theory of gases, the kinetic energy of molecules is proportional to which factor? A. Concentration in m
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B. Temperature in Kelvin
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