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3 years ago

1. Set frequency of wave generator to 5Hz.

Physics

1 answer:

ivann1987 [24]3 years ago

3 0

Separate the barriers so they have a 2cm gap between them.

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What effect would the temperature have on the time kept by a pendulum clock if the pendulum rod increase in length with an incre

Allushta [10]

As we know the time period of pendulum is given by the equation

$T = 2\pi \sqrt{\frac{L}{g}}$

so here

L = length of the pendulum

Now on increasing the temperature due to thermal expansion the length of the pendulum will increase and due to this the time period of the pendulum will also increase

Now due to increase in time period of the pendulum the clock will become slow and it will give incorrect time due to this increase in temperature

6 0

2 years ago

Read 2 more answers

A 0.412 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plun

AveGali [126]

Answer:

108.18 m/s2

Explanation:

1 atm = 101325 Pa

r = 7.41 mm = 0.00741m

Since the pressure is increased by a factor of 2.55, the new inner pressure inside the system would be

P = 101325 * 2.55 = 258378.75 Pa

This pressure exerts a force on the metal cylinder, knowing the radius, we can calculate the cross-section area:

$A = \pi r^2 = \pi 0.00741^2 = 0.0001725 m^2$

Then the force exerted:

$F = A*P = 0.0001725*258378.75 = 44.57 N$

Finally we can calculate the initial acceleration in accordance with Newton's 2nd law of motion:

$a = F/m = 44.57 / 0.412 = 108.18 m/s^2$

7 0

3 years ago

A girl weighing 200 newtons hangs from three pulley systems.

a_sh-v [17]

Most likely the answer is b

4 0

2 years ago

Read 2 more answers

You have a concave mirror with a focal length of 100.0 cm, and you want an image that is upright and 10.0 times as tall as the o

Elenna [48]

ANSWER:

a. 9.09cm

STEP-BY-STEP EXPLANATION:

Given:

Focal length = 100 cm

Distance image = -10 cm

We use the following formula to calculate the value of the distance of the object:

$\frac{1}{d_o}+\frac{1}{d_i}=\frac{1}{f}$

We substitute each value and calculate the distance of the object just like this:

$\begin{gathered} \frac{1}{d_o}+\frac{1}{-10}=\frac{1}{100} \\ \\ \frac{1}{d_{o}}=\frac{1}{100}+\frac{1}{10} \\ \\ \frac{1}{d_o}=\frac{11}{100} \\ \\ d_o=\frac{100}{11} \\ \\ d_o=9.09\text{ cm} \end{gathered}$

Therefore, the correct answer is option a. 9.09cm

4 0

1 year ago

An EMT raceway contains two 3-phase, 480-volt branch circuits. What minimum size THHN branch circuit conductor is required for o

bulgar [2K]

Answer:8 AWG

Explanation: 6 current carrying conductors with 2 - 3 phase branch circuits. Divide 27000 by (480v × 1.732 or square root of 3) and you get 32.46 amps. Now using the code book, divide 32.46 by the adjustment factor of 6 CCC's which is .8 and you get 40.61 amps. Now go to Table 310.16 in the 2020 NEC book and you'll see that in the 90° column that 40.61 amps is above #10 AWG so you size up to #8 AWG.

5 0

1 year ago