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3 years ago

5

How does a walkie-talkie work and why do people still use them ?

2 answers:

erastova [34]3 years ago

6 0

A walkie talkie works on wires on the inside and by the battery. People still use them because they are fun and you can talk if your 6 or 10 inches away and it sounds cool!

igomit [66]3 years ago

4 0

People use them to talk faster, rather than pulling your phone out unlocking it, opening phone app, etc...you just take the walmie talkie out and push a button, and you can hear multiple people

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The atomic number of Krypton si 36. if the mass number of a Krypton atom si 84, which table shows the number of subatómico insid

Elan Coil [88]

Answer:

A

Explanation:

You did not list the options. However, knowing the possible options from having seen the material myself - I can infer that the answer option is A. I apologize sincerely if this is wrong.

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3 years ago

Use the data provided to calculate the gravitational potential energy of each cylinder mass. Round your answers to the nearest t

pantera1 [17]

Answer: 3kg: 14.7 6kg: 29.4 9kg: 44.1

Explanation: just did it on Edge

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3 years ago

Read 2 more answers

t requires1200 kg of coal to produce the energy needed to make 1.0 kg of aluminum metal. If a single soda can requires approxima

Lesechka [4]

Answer:

The mass of coal is 108 kg.

Explanation:

Given that,

Energy of coal = 1200 kg

Mass of aluminum = 1.0 kg

Energy required for single soda can = 15 g of Al

Energy required for 6 pack of cans = $6\times15=90\ g\ of\ Al$

We need to calculate the mass of coal

Using formula of mass

$\text{mass of coal}=\dfrac{\text{Energy of coal}\times\text{Energy required for 6 pack of cans}}{\text{Mass of aluminum}}$

Put the value into the formula

$m=\dfrac{1200\times90\times10^{-3}}{1.0}$

Put the value into the formula

$m=108\ Kg$

Hence, The mass of coal is 108 kg.

6 0

4 years ago

A circular loop of wire is positioned so the normal to its area points vertically upward. A bar magnet is dropped from above the

Kruka [31]

B cause there is no induced current incorrect

8 0

4 years ago

A bucket that has a mass of 20 kg when filled with sand needs to be lifted to the top of a 15 meter tall building. You have a ro

prohojiy [21]

Answer:

work done lifting the bucket (sand and rope) to the top of the building,

W=67.46 Nm

Explanation:

in this question we have given

mass of bucket=20kg

mass of rope= $.2\frac{kg}{m}$

height of building= 15 meter

We have to find the work done lifting the bucket (sand and rope) to the building =work done in lifting the rope + work done in lifting the sand

work done in lifting the rope is given as, $W_{1}=Force \times displacement$

= $\int\limits^{15}_0 {.2x} \, dx$ ..............(1)

= $.1\times 15^2$

=22.5 Nm

work done in lifting the sand is given as, $W_{2}=Force \times displacement$

$W_{2}=\int\limits^{15}_0 F \, dx$ .................(2)

Here,

F=mx+c

here,

c=20-18

c=2

m= $\frac{20-18}{15-0}$

m=.133

Therefore,

$F=.133x+2$

Put value of F in equation 2

$W_{2}=\int\limits^{15}_0 (.133x+2) \, dx$

$W_{2}=.133 \times 112.5+2\times15\\W_{2}=14.96+30\\W_{2}=44.96 Nm$

Therefore,

work done lifting the bucket (sand and rope) to the top of the building, $W=W_{1}+W_{2}$

W=22.5 Nm+44.96 Nm

W=67.46 Nm

4 0

4 years ago