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Agata [3.3K]
3 years ago
12

6

Physics
1 answer:
asambeis [7]3 years ago
6 0

Answer:

TAJUK

Explanation:

Sebab saya suka makan ayam goreng, esok saya nak pesan daripada kedai pak abu, terima kasih bosku

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When the temperature of ice-cold water is increased slightly, does it undergo a net expansion or net contraction?
miss Akunina [59]

From the freezing temperature up to about 4°C (39°F) the water CONTRACTS.  That is, it becomes MORE dense.  I think I read that water is the ONLY known substance whose solid phase floats in its liquid phase.  That's why the cubes float in your soda and bergs float in the ocean.  And if weren't so, then life on Earth would not be possible !  Oceans and lakes would freeze from the bottom up, ONE TIME, and then never thaw again.

4 0
2 years ago
One difference between a hypothesis and a theory is that a hypothesis
DaniilM [7]

A hypothesis is a proposed explanation made on the basis of limited information while a theory is a series of ideas intended to explain something.

7 0
2 years ago
Your sister has been taking her friend's ADHD medication. She is struggling with trying to quit using the medication and asks yo
salantis [7]
The correct answer for this is A. <span>Accompany her to talk with your parents or another trusted adult to ask for help

when a friend is under the problems of addiction, it's always best to get help from a trusted adult.</span>
5 0
3 years ago
Read 2 more answers
A 5.0-kg centrifuge takes 95 s to spin up from rest to its final angular speed with constant angular acceleration. A point locat
stellarik [79]

Answer:

(a) 17.37 rad/s^2

(b) 12479

Explanation:

t = 95 s, r = 6 cm = 0.06 m, v = 99 m/s, w0 = 0

w = v / r = 99 / 0.06 = 1650 rad/s

(a) Use first equation of motion for rotational motion

w = w0 + α t

1650 = 0 + α x 95

α = 17.37 rad/s^2

(b) Let θ be the angular displacement

Use third equation of motion for rotational motion

w^2 = w0^2 + 2 α θ

1650^2 = 0 + 2 x 17.37 x θ

θ = 78367.87 rad

number of revolutions, n = θ / 2 π

n = 78367.87 / ( 2 x 3.14)

n = 12478.9 ≈ 12479

4 0
3 years ago
How could you test the hypothesis that elephants interpreted the ground signal as being farther away than the air signal?
bekas [8.4K]

Answer:

One way to test the hypothesis is to create two waves, one in the air and one on the ground at the same time. One of them for the elephant to get closer and another for the elephants to move away. Observe the reaction of the animal and with this we know which sound came first.

Explanation:

This hypothesis is based on the fact that the speed of sound in air is v = 343 m / s with a small variation with temperature.

The speed of sound in solid soil is an average of the speed of its constituent media, giving values ​​between

 wood      3900 m / s

 concrete 4000 m / s

 fabrics     1540 m / s

 earth       5000 m / s wave S

 ground    7000 m / s P wave

 

we can see that the speed on solid earth is an order of magnitude greater than in air.

One way to test the hypothesis is to create two waves, one in the air and one on the ground at the same time. One of them for the elephant to get closer and another for the elephants to move away. Observe the reaction of the animal and with this we know which sound came first.

From the initial information, the wave going through the ground should arrive first.

3 0
3 years ago
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