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3 years ago

What is the weight of a 2.06 kg text book. show work please

1 answer:

7 0

The weight of anything is (mass) x (gravity in the place where the thing is).

 Gravity on Earth is about 9.8 newtons per kilogram, so on Earth,
 the weight of the book is

(2.06 kg) x (9.8 N/kg) = 20.19 newtons .

Another way to get around it is:

 On Earth, 1 kg of mass weighs about 2.205 pounds, so on earth,
 the weight of the book is

 (2.06 kg) x (2.205 pounds/kg) = 4.54 pounds .

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I've been told that my tension is supposed to be in the mid 40s, but I got seventy three, what did I do wrong?

Inessa05 [86]

Answer:

you were sopposed to divide

Explanation:

6 0

3 years ago

Based on the replacement reaction, what would the products of the reaction be?

cricket20 [7]

Answer:

$\rm Be(OH)_2$ and $\rm (NH_4)_2 SO_4$ . The missing ion would be $\rm OH^{-}$ .

Explanation:

In a double replacement reaction, two ionic compounds exchange their ions to produce two different ionic compounds.

In this question, the two ionic compounds are:

$\rm BeSO_4$ , and
$\rm NH_4 OH$ .

In particular,

$\rm BeSO_4$ is made up of $\rm Be^{2+}$ ions and $\rm {SO_4}^{2-}$ ions, while
$\rm NH_4 OH$ is made up of $\rm {NH_4}^{+}$ ions and $\rm OH^{-}$ ions.

In a binary ionic compound, cations (positive ions) can only bond to anions (negative ions.)

$\rm Be^{2+}$ is a cation. In $\rm BeSO_4$ , $\rm Be^{2+}$ was bounded $\rm {SO_4}^{2-}$ anions. During the reaction, it bonds with $\rm OH^{-}$ anions to produce $\rm Be(OH)_2$ .

$\rm {NH_4}^{+}$ is also a cation. In $\rm NH_4 OH$ , $\rm {NH_4}^{+}$ was bounded to $\rm OH^{-}$ ions. During the reaction, it bonds with $\rm {SO_4}^{2-}$ anions to produce $\rm (NH_4)_2 SO_4$ .

Hence, the two products will be $\rm Be(OH)_2$ and $\rm (NH_4)_2 SO_4$ .

Note that charges on the ions must balance. For example, a $\rm Be^{2+}$ ion carries twice as much charge as an $\rm {NH_4}^{+}$ ion. As a result, each $\rm Be^{2+}$ ion would bond with twice as many $\rm OH^{-}$ ions as $\rm {NH_4}^{+}$ would in $\rm NH_4 OH$ .

4 0

4 years ago

Read 2 more answers

In a house 5 bulbs of 25 watts each are used for 6 hours a day.Calculate the unit of electricity consumed in a month of 30 days.

Svetradugi [14.3K]

(5 bulbs) x (25 watt/bulb) x (6 hour/day) x (30 day/month) =

 (5 x 25 x 6 x 30) watt-hour/month =

 22,500 watt-hour/month .

The most common unit of electrical energy used for billing purposes
is the 'kilowatt-hour' = 1,000 watt-hours .

 22,500 watt-hour/month = 22.5 kWh/month.

 (22.5 kWh/month) x (1.50 Rs/kWh) = 33.75 Rs / month

4 0

3 years ago

As shown in the figure below, a seal and the penguin are playing a fun game of tag. The penguin first swims rightward

RSB [31]

Answer:

Explanation:

Average velocity = Displacement/Time

ΔS = -10+6

ΔS = -4m

Given tme = 30s

Average velocity = -4/30

Average velocity = -0.13m/s

Average speed = Distance/Time

Total distance covered = 10m+6m

Total distance covered = 16m

Average speed = 16/30

Average speed = 0.53m/s

7 0

4 years ago

True or False: Cooler objects always have more thermal energy than warmer objects.

tensa zangetsu [6.8K]

False

Because you can see using a thermal camera I guess

3 0

3 years ago