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3 years ago

5

Radio waves, which travel at the speed of light, are used to communicate with satellites in space. If a message from flight cont

rol requires 170 seconds to reach a satellite, how far, in kilometers, is the satellite from Earth?

1 answer:

Burka [1]3 years ago

7 0

Answer:

Is this on edgenuity or some type of virtual school Lmk and then i could help !

Explanation:

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If 200 g of water is heated from 20 C to 40 C, then what is the heat added in kilocalories (same as food calories)?

Maslowich

Answer: 4Kcal

Explanation:

H= mcø

M=200g

C= 1 cal/g/°c

Ø= 40-20=20°c

H= 200*1*20= 4000calories= 4Kcal

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3 years ago

Tollens’ test, also known as silver-mirror test, is a qualitative laboratory test used to distinguish between an aldehyde and a

Makovka662 [10]

Explanation:

Tollens' reagent is prepared by using two-step process : -

Step 1:

Silver oxide is formed by mixing aqueous silver nitrate with base like sodium hydroxide. The reaction is shown below as:

$AgNO_3 + NaOH &\rightarrow AgOH + NHO_3 \nonumber \\ 2AgOH &\rightarrow Ag_2O + H_2O$

Step 2

Ammonia solution is drop-wise added until all the silver oxide dissolves to form the reagent. The reaction is shown below as:

$Ag_2O + 4NH_3 + H_2O \rightarrow 2Ag(NH_3)_2^+ + 2OH^-$

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4 years ago

How is the food in a stomach broken down into simpler substances? What chemicals help this process?

Ksenya-84 [330]

Answer:

with the help of the juice contained in it

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3 years ago

What are the three different types of selective breeding

balandron [24]

first of all there is only two types of selective breeding and they are hybridization and inbreeding.

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3 years ago

When are zeros significant in a value ?

ASHA 777 [7]

Answer:

If the zero is between fwo nonzeros

Explanation:

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4 years ago

Read 2 more answers