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3 years ago

Describe at least two different objects that you think are

Physics

2 answers:

ddd [48]3 years ago

6 0

Answer:

paper clips and scissors

Explanation:

Objects are made of atoms. However, in case of magnetic objects like the "paper clips" and "scissors," their atoms' magnetic fields are said to be arranged in alignment with each other. So, this means that their north magnetic pole and south magnetic pole are aligned with each other. These makes the magnetic objects different from non-magnetic objects, whose north and south magnetic poles are placed randomly.

So, this explains the answer.

nexus9112 [7]3 years ago

3 0

Answer: A stainless steel refrigerator door, the body parts of cars, and file cabinets are magnetic because they are made of metal and magnets stick to them.

Explanation: this is the sample response on edge.

hope this is helpful (:

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The age of a piece of wood from an archeological site is to be determined using the Carbon-14 method. The activity of the sample

Bezzdna [24]

Answer:

4589.05 year

Explanation:

The relation of activity is given by $A=A_0e^{\lambda t}$ we have given $\frac{A}{A_0}=0.574$

Half life $T=5730\ years$

We know that half life $T=\frac{0.693}{\lambda }$

$\lambda =\frac{0.693}{5730}=1.2094\times 10^{-4}\ per\ year$

So $0.574=e^{-1.2094\times 10^{-4}t}$

$e^{1.2094\times 10^{-4}t}=\frac{1}{0.574}=1.742$

${1.2094\times 10^{-4}t}=ln1.742=0.555$

$t=\frac{0.555}{1.2094\times 10_{-4}}=4589.05\ year$

7 0

3 years ago

A uniform bar has two small balls glued to its ends. The bar has length L and mass M, while the balls each have mass m and can b

vazorg [7]

Answer:

Explanation:

Length of bar = L

mass of bar = M

mass of each ball = m

Moment of inertia of the bar about its centre perpendicular to its plane is

$I_{1}=\frac{ML^{2}}{12}$

Moment of inertia of the two small balls about the centre of the bar perpendicular to its plane is

$I_{2}=2\times m\times \frac{L^{2}}{4}$

$I_{2}=\frac{mL^{2}}{2}$

Total moment of inertia of the system about the centre of the bar perpendicular to its plane is

I = I1 + I2

$I=\frac{ML^{2}}{12}+\frac{mL^{2}}{2}$

$I=\frac{(M +6m)L^{2}}{12}$

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3 years ago

What causes differences in air pressure around the Earth?

Olegator [25]

Wind is primarily driven by differences in air pressure. These variations in air pressure are due to temperature differences caused by variations in solar energy received at the surface of the Earth.

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4 years ago

If a frog is the prey what could be the predator ?

bezimeni [28]

The answer is B. Snake.

Hope this helps!

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4 years ago

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jose buys a new moped. He travels 3km south and then 4 km east. How far does he need to go to get back to where he started?

cupoosta [38]

4km. its a trick question obviously lol

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3 years ago

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