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3 years ago

Which question about dogs could be answered through scientific investigation?

Physics

2 answers:

sertanlavr [38]3 years ago

8 0

B because the rest are not

o-na [289]3 years ago

4 0

Answer:

Explanation:

because it is an investigation that shows a hypothesis

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Radar is used to determine distances to various objects by measuring the round-trip time for an echo from the object. (a) How fa

zloy xaker [14]

Answer:

150000000000 m

0.0000005 seconds

33.33 ns

Explanation:

Speed of electromagnetic waves through vacuum = $3\times 10^8\ m/s$

Echo time = 1000 seconds

Echo time is the time taken to reach the object and come back to the observer

Distance = Speed×Time

$Distance=3\times 10^8\times \frac{1000}{2}=150000000000\ m$

Venus is 150000000000 m away from Earth

Time = Distance / Speed

$Time=\frac{75}{3\times 10^8}=0.00000025\ seconds$

Echo time will be twice the time

$Echo\ time=2\times 0.00000025=0.0000005\ seconds$

The echo time will be 0.0000005 seconds

Difference in time = Difference in distance / Speed

$\Delta t=\frac{\Delta d}{v}\\\Rightarrow \Delta t=\frac{10}{3\times 10^8}\\\Rightarrow \Delta=33.33\ ns$

The accuracy by which I will be able to measure the echo time is 33.33 ns

5 0

3 years ago

What is the correct chemical name for C7H8?

Nesterboy [21]

Answer:

Cycloheptatriene

Explanation:

4 0

3 years ago

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Find the slit separation of a double-slit arrangement that will produce interference fringes 0.018 rad apart on a distant screen

inessss [21]

Answer:

1.64 * 10^(-5) m

Explanation:

Parameters given:

Angular separation, θ = 0.018 rad

Wavelength, λ = 589 nm = 5.89 * 10^(-7) m

The angular separation when there are 2 slots is given as

θ = λ/2d

where d = separation between slits

d = λ/2θ

d = (589 * 10^(-9))/(2 * 0.018)

d = 1.64 * 10^(-5) m

5 0

2 years ago

Explain 2 reasons why reactions take place faster at high temperature

Vlada [557]

I have one reason the reaction take place faster because the molecules are going at a faster pace because the temperature is rising

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2 years ago

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Which statement describes why ocean currents are considered convection currents?

Nataly_w [17]

I think its B B)Warm water rises and cold water moves in to replace it.

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3 years ago

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