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MariettaO [177]

3 years ago

11

A typical microwave oven operates at a frequency of 2.45 GHz. What is the wavelength associated with the electromagnetic waves i

n the oven?

1 answer:

babunello [35]3 years ago

8 0

Answer:4.9

Explanation:

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A group of students is investigating whether the smoothness of surface affects the force of friction. Each student pushes a book

Pani-rosa [81]

To find the average (aka mean) of a group of numbers, all we need to do is add them up then divide that number by how many numbers we started with

23 + 21 + 24 + 22 = 90

90 ÷ 4 = 22.5

Therefore, the average distance the book traveled on ice is 22.5 cm

15 + 18 + 16 + 17 = 66

66 ÷ 4 = 16.5

Therefore, the average distance the book traveled on concrete is 16.5 cm

In conclusion, the average distance the book traveled on ice is greater than the average distance the book traveled on concrete

Hope this helps you

-AaronWiseIsBae

5 0

3 years ago

Read 2 more answers

A uniform disk with a mass of 5.0 kg and diameter 30 cm rotates on a frictionless fixed axis through its center and perpendicula

igomit [66]

Answer:

Angular acceleration of the disk will be $\alpha =10.714rad/sec^2$

Explanation:

We have given mass of the disk m = 5 kg

Diameter of the disk d = 30 cm = 0.3 m

So radius $r=\frac{d}{2}=\frac{0.3}{2}=0.15m$

Moment of inertia of disk is given by $I=\frac{1}{2}mr^2=\frac{1}{2}\times 5\times 0.15^2=0.056kgm^2$

Force is given by F=4 N

Torque is given as $\tau =Fr=4\times 0.15=0.6N-m$

We also know that torque is given by $\tau =I\alpha$

$0.6=0.056\times \alpha$

$\alpha =10.714rad/sec^2$

5 0

3 years ago

While fishing on a lake, a fisherman notices ripples 0.32 m apart, and they are

Karo-lina-s [1.5K]

the main properties of the main wave propertioes include wavelength amplitude, cruest an trough

5 0

3 years ago

What’s the force of a pitching machine on a baseball? Baseballs pitched by a machine have a horizontal velocity of 30 meters/sec

Leya [2.2K]

The acceleration of the baseball is:
$a= \frac{v_f-v_i}{\Delta t}$
where $v_f$ and $v_i$ are the final and initial speed of the ball, and $\Delta t$ is the time interval in which the force acted.

Replacing the numbers, we get
$a= \frac{30 m/s-0m/s}{0.5 s}=60 m/s^2$
And at this point, we can use Newton's second law F=ma to find the value of the force of the pitching machine:
$F=ma=(0.15 kg)(60 m/s^2)=9 N$

5 0

3 years ago

Which feature of a human community is similar to a niche in a biological community?

pogonyaev

Answer: C. occupation

7 0

4 years ago