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Fittoniya [83]
3 years ago
7

Radio telescopes cannot be used with an overcast, cloudy sky. true or false

Physics
1 answer:
sweet [91]3 years ago
4 0
The answer to this is false  hope this helps 
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Sure um how is your day going

Explanation:

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Whitch tool could be used to mesure the mass of. a package being mailed​
Ivenika [448]

Answer:

the answer is kilograms

Explanation:

you would use kilograms to measure mass.

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Nutritionists use the ______ to measure how much energy we get from foods.
Natali [406]
<span>It is measured in calories </span>
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4 years ago
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a 1000kg car uses a breaking force of 10,000N to stop in two second. What is the change in momentum of the car?
gayaneshka [121]

Answer:

ΔP =  20000 N s

Explanation:

To solve this problem we use the relation between momentum and moment

         I = Δp

let's calculate the momentum

         I = ∫F dt

if we use the average force

       I = F t

       I = 10000 2

       I = 20000 N s

therefore with the first equation

        ΔP = I = 20000 N s

8 0
3 years ago
What frequency is received by a stationary mouse just before being dispatched by a hawk flying at it at 24.7 m/s and emitting a
Montano1993 [528]

Answer:

   f' = 3665.51 Hz

Explanation:

given,

speed of the hawk = 24.7 m/s

frequency of screech emitted by the hawk = 3400 Hz

speed of sound = 331 m/s

By Doppler's effect

f' = (\dfrac{v}{v-v_s}})f

f' is the frequency received by the mouse

v is the speed of the sound

v_s is the speed of the hawk

now,

f' = \dfrac{341}{341-24.7}}\times 3400

   f' = 1.078 x 3400

   f' = 3665.51 Hz

The frequency received by the stationary mouse is equal to 3665.51 Hz

6 0
3 years ago
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