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zimovet [89]
3 years ago
9

1. Compare and Contrast microwaves with visible light using wavelength, frequency and energy

Physics
1 answer:
coldgirl [10]3 years ago
4 0
Visible light has more energy than microwaves but it has a smaller wavelength than microwave
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Approximately how much energy is contained in 1 g of matter?
aleksley [76]

Option (B) is correct.Energy contained in one gram of matter=9 x 10¹³ J

Explanation:

mass= 1 g= 0.001 kg

c= velocity of light= 3 x 10⁸ m/s

The mass energy equivalence equation is given by

E = m C²

E= (0.001)(3 x 10⁸)²

E=9 x 10¹³ J

Thus energy contained in one gram of matter=9 x 10¹³ J

7 0
3 years ago
A 100 kg box is suspended from two ropes. The "left rope makes an angle of 20" degrees with the vertical, and the right rope mak
GarryVolchara [31]

Explanation:

It is given that,

Mass of the box, m = 100 kg          

Left rope makes an angle of 20 degrees with the vertical, and the right rope makes an angle of 40 degrees.  

From the attached figure, the x and y component of forces is given by :

T_{1x} =-T_1 cos (20)

T_{2x} = T_2 cos (40)

mg_x = 0

T_{1y} = T_1 sin (20)

T_{2y} = T_2 sin (40)

mg_y= -mg

Let R_x and R_y is the resultant in x and y direction.

R_x=-T_1 cos (20)+T_2 cos (40)+0

R_y=T_1 sin(20)+T_2 sin(40)-mg

As the system is balanced the net force acting on it is 0. So,

-T_1 cos (20)+T_2 cos (40)+0=0.............(1)

T_1 sin(20)+T_2 sin(40)-100\times 9.8=0..................(2)

On solving equation (1) and (2) we get:  

T_1=866.86\ N (tension on the left rope)

T_2=1063.36\ N (tension on the right rope)

So, the tension on the right rope is 1063.36 N. Hence, this is the required solution.                            

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In the early 1800's a system for naming geologic time periods was devised using four periods of geologic time. They were named using Latin root words, Primary, Secondary, Tertiary and Quaternary. ... Keep in mind that this chart is focused on geologic time periods. There are also geologic Eons, Eras, and epochs.

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Creativity because its something cool

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