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Pie
2 years ago
15

What is the minimum diameter necessary for a radio telescope working at f=1×10^10 Hz to be able to separate two objects 1 deg ap

art?
[a] 0.03 m
[b] 0.037 m
[c] 0.47 m
[d] 2.1 m
[e] 6.3 m
Physics
1 answer:
Ad libitum [116K]2 years ago
5 0
Your answer is a yessssssir
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To what temperature will a 79.0 g piece of glass raise if it absorbs 9457 calories of heat and its specific heat capacity is 0.5
ruslelena [56]

Answer:

T_final = 279.4 [°C]

Explanation:

In order to solve this problem, we must use the following equation of thermal energy.

Q=m*C_{p}*(T_{f}-T_{i})

where:

Q = heat = 9457 [cal]

m = mass = 79 [g] = 0.079 [kg]

Cp = specific heat = 0.5 [cal/g*°C]

T_initial = initial temperature = 40 [°C]

T_final = final temperature [°C]

9457 = 79*0.5*(T_{f}-40)\\239.41=T_{f}-40\\\\T_{f}=279.4[C]

8 0
3 years ago
Velocity may be positive,negative or zero.Explain this statement with diagram.​
Arada [10]

Answer:

/

Explanation:

3 0
2 years ago
Which of the following natural processes is most likely to support the formation of an underwater sinkhole?
Nesterboy [21]

Answer:

Limestone cave collapsing due to changes in sea level.

Explanation:

Sinkholes are common where the rock below the land surface is limestone or other carbonate rock, salt beds, or in other soluble rocks, such as gypsum, that can be dissolved naturally by circulating ground water. Sinkholes also occur in sandstone and quartzite terrains.

7 0
3 years ago
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Which is more likely to be dangerous-a volcano that erupts frequently or a volcano that has been inactive for a hundred years? W
Korvikt [17]

Answer:

A volcano that erupts frequently.

Explanation:

Both.

But the volcano that hasn't erupted in 100 years would probably be more dangerous because you wouldn't be prepared for its explosion as you would be for the one that erupts frequently.

Glad I could help!!

6 0
3 years ago
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A particle with a mass of 9.00 ✕ 10-20 kg is vibrating with simple harmonic motion with a period of 3.00 ✕ 10-5 s and a maximum
Goshia [24]

Answer:

(a) \omega=2.09*10^{5}\frac{rad}{s}

(b) A_{max}=0.033m

Explanation:

(a) The angular frequency is defined as:

\omega=2\pi f

Here f is the frequency of the particle, which is inversely proportional to its period:

f=\frac{1}{T}

Replacing, we have:

\omega=\frac{2\pi}{T}\\\omega=\frac{2\pi}{3*10^{-5}s}\\\omega=2.09*10^{5}\frac{rad}{s}

(b) The maximum displacement is given by:

A_{max}=\frac{v_{max}}{\omega}\\A_{max}=\frac{7*10^3\frac{m}{s}}{2.09*10^5\frac{rad}{s}}\\A_{max}=0.033m

5 0
3 years ago
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