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3 years ago

Which metal has the lowest atomic weight

Physics

2 answers:

Ray Of Light [21]3 years ago

7 0

Lithium, Li = 6.94 :)

Ber [7]3 years ago

7 0

Lithium, it is around 6.4 in atomic weight.

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Which quantity Has the same unit as potential difference

adelina 88 [10]

Answer:

Voltage.

Explanation:

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3 years ago

A 5 .0kg cart is moving horizontaly at 6 .0m/s in order to change its speed to 10m/s the net work done on the cart must be

ahrayia [7]

Answer:

the net work done on the cart is 160 J.

Explanation:

Given;

mass of the cart, m = 5.0 kg

initial velocity of the cart, u = 6 m/s

final velocity of the cart, v = 10 m/s

The net work done on the cart is equal to change in average kinetic energy of the cart;

$W = K.E = \frac{1}{2} m(v^2-u^2)\\\\W = \frac{1}{2} \times 5(10^2-6^2)\\\\W = 160 \ J$

Therefore, the net work done on the cart is 160 J.

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3 years ago

On the surface of the earth the weight of an object is 200 lb. Determine the height of the

siniylev [52]

Answer:

The height of the object is 5007.4 miles.

Explanation:

Given that,

Weight of object = 200 lb

We need to calculate the value of $Gmm_{e}$

Using formula of gravitational force

$F=\dfrac{Gmm_{e}}{r^2}$

Put the value into the formula

$200=\dfrac{Gmm_{e}}{(3958.756)^2}$

$200\times(3958.756)^2=Gmm_{e}$

$Gmm_{e}=3.134\times10^{9}$

We need to calculate the height of the object

Using formula of gravitational force

$F=\dfrac{Gmm_{e}}{r^2}$

Put the value into the formula

$125=\dfrac{200\times(3958.756)^2}{r^2}$

$r^2=\dfrac{200\times(3958.756)^2}{125}$

$r^2=25074798.5$

$r=\sqrt{25074798.5}$

$r=5007.4\ miles$

Hence. The height of the object is 5007.4 miles.

7 0

3 years ago

What is the relation between height and energy?

Evgesh-ka [11]

Since the gravitational potential energy of an object is directly proportional to its height above the zero position, a doubling of the height will result in a doubling of the gravitational potential energy. A tripling of the height will result in a tripling of the gravitational potential energy.

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3 years ago

Crying is a .........of distress to babies.

Fiesta28 [93]

Crying is a signal of distress to babies.

Some reasons why babies cry: The baby is not feeling well, strange feeling that needs nappy change, a feeling of hot or cold, a feeling of tired and needs rest, a feeling of cuddling, feel like crying, and a feeling of hungry.

4 0

4 years ago

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