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algol [13]
3 years ago
5

Which of the following is an example of rotation

Physics
1 answer:
SOVA2 [1]3 years ago
8 0
I believe it is D. Earth spinning on it's axis.
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Calculate the wavelength in centimeters of radar energy at a frequency of 10 GHz. What is the frequency in gigahertz of radar en
ddd [48]

Answer:

Energy will be equal to 6.6\times 10^{-27}J

Frequency will be equal to 12\times 10^8Hz

Explanation:

We have given frequency of the radar f = 10 GHz =10\times 10^6Hz

Speed of light c=3\times 10^8m/sec

Plank's constant h=6.6\times 10^{-34}js

So energy E=h\nu,here h is plank's constant and \nu is frequency

So energy E=6.6\times 10^{-34}\times 10^{7}=6.6\times 10^{-27}J

In second case we have given wavelength = 25 cm = 0.25 m

Wavelength is equal to \lambda =\frac{c}{f}

So f=\frac{c}{\lambda }=\frac{3\times 10^8}{0.25}=12\times 10^8Hz

So frequency will be equal to 12\times 10^8Hz

8 0
3 years ago
An object's buoyant force and weight mean the same thing.<br><br>A. True<br><br>B. False​
german

Answer:

False

Explanation:

No. The buoyant force on an object is the portion of its weight that appears to vanish

when the object is in any fluid (could be either a liquid or a gas).

If the object happens to float in a particular fluid, then the buoyant force at that moment

is equal to the object's weight.

Notice that the buoyant force on an object will be different in different fluids.

6 0
3 years ago
After a 50-kg person steps from a boat onto the shore, the boat moves away with a speed of 0.70 m/s with respect to the shore. I
Svetradugi [14.3K]

Answer:

M=125 kg

v=1.75 m/s

Explanation:

From the law of linear momentum

  P =mv

Case 1     50*V =M* 0.7     equation 1

               50*V =(M+50)* 0.5    equation 2

equating 1 and 2

               M* 0.7=(m+50)* 0.5

               0.2 M= 25

                    M=125 kg

Putting value of M in equation 1

               50*V =125*0.7

                     V=1.75 m/s

                   

7 0
3 years ago
Read 2 more answers
The data table for the decomposition reaction of hydrogen peroxide H2 O2 shows how the reaction rate changes over time which sta
DedPeter [7]

I believe the answer is A.

4 0
3 years ago
Read 2 more answers
Typical Pressurized Water Reactors can produce 1100 to 1500
lozanna [386]

Answer: about 1,100,000,000 to 1,500,000,000 Joules/second

Explanation:

1 MW (megawatt) = 1,000,000.00 J/s (joules per second)

1100(1,000,000) = 1,100,000,000

1500(1,000,000) = 1,500,000,000

3 0
2 years ago
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