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3 years ago

8

At what rate, in m/s2, does gravity cause objects to accelerate on Earth? Do not include units in your answer.

1 answer:

ivolga24 [154]3 years ago

6 0

Answer:

9.8

Explanation:

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Can you think of any common ""real-life"" situations in which an understanding of conservation would allow a concrete operationa

Marina86 [1]

Conservation is the understanding that the quantity of an object stays the same even when it changes in appearance. A concrete operational child between ages seven and eleven understands this fact because of the development of his cognitive ability while a preoperational child does not.

For example, change the tea cup of a 5 year old boy from an oblong shape to a short round shape of the same size, he begins to cry because he believes the change in cup has translated to a change in quantity.

In addition, change the denominations contained in an amount of money owned by each of the children of these two categories, the pre operational child seems a lot bothered, but the concrete operational child has enough knowledge of conservation to be undisturbed by this re-arrangement.

3 0

3 years ago

A wave has angular velocity 12 rad/sec and maximum displacement X cm (X= last two digit [1] of your student’s ID). Calculate the

Naily [24]

Answer:

$a=1440\ m/s^2$

Explanation:

Given that,

The angular velocity of a wave, $\omega=12\ rad/s$

The maximum displacement of the wave, A = 10 cm (let)

The maximum acceleration of the wave is given by :

$a=-A\omega^2$

Put all the values,

$a=10\times 12^2\\\\a=1440\ m/s^2$

So, the maximum acceleration of the wave is equal to $1440\ m/s^2$ .

4 0

3 years ago

A 2 kg blob of sticky putty is thrown with a velocity of 5 m/s at a 1 kg doll. After impact, the putty sticks to the doll and co

kow [346]

Answer:3.33 m/s

Explanation:

Given

mass of Putty M=2 kg

the velocity of bob u=5 m/s

mass of doll m=1 kg

As there is no external force acting so linear momentum is conserved

Mu=(M+m)v

where v=common velocity of putty and doll after the impact

$2\times 5=(2+1)v\\v=\dfrac{10}{3}\ m/s\approx3.33\ m/s$

6 0

3 years ago

To ensure the greatest nutritional benefits, dietary guidelines suggest which of the following?

oee [108]

The answer would be D. Eating nutrient-dense foods

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4 years ago

Read 2 more answers

The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glas

DochEvi [55]

Answer:

b. 3 times

Explanation:

Lets take

Coefficient for ordinary glass = α₁

Coefficient for pyrex glass = α₂

Given that α₁ = 3 α₂

Initial length of both glasses are equal = L

Change in the temperature is also same .= ΔT

We know that change in the length given as

ΔL = L α ΔT

Therefore

$\dfrac{\Delta L_1}{\Delta L_2}=\dfrac{L\alpha_1\Delta T}{L\alpha_2\Delta T}$

$\dfrac{\Delta L_1}{\Delta L_2}=\dfrac{3\alpha_2}{\alpha_2}$

ΔL₁ = 3ΔL₂

Therefore change in the length of original glass is three time of pyrex glass.

b. 3 times

6 0

4 years ago