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3 years ago

Please help me like rn it’s an embergency

Physics

1 answer:

hichkok12 [17]3 years ago

4 0

Answer:

first one

Explanation:

electromagnetism is the forces and fields associated with charge

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Collision practice

NikAS [45]

Answer:

$v_f=4\:\mathrm{m/s\: in\:Biff's\:direction}$

Explanation:

Using the Law of Conservation of Momentum, we can set up the following equation:

$m_2v_2-m_1v_1=m_fv_f$ , where $m_1v_1$ is Bruce's momentum and $m_2v_2$ .

Plugging in given values, we get:

$90\cdot7-45\cdot2=(90+45)v_f, \\v_f=\frac{540}{135}=\fbox{$4\:\mathrm{m/s}$}$ .

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3 years ago

Compute the resistance in ohms of a silver block 10 cm long and 0.10 cm2 in cross-sectional area. ( = 1.63 x 10-6 ohm-cm)

Vedmedyk [2.9K]

The resistance of the silver block is given by
$R= \frac{\rho L}{A}$
where
$\rho=1.63 \cdot 10^{-6} \Omega \cdot cm$ is the silver resistivity
$L=10 cm$ is the length of the block
$A=0.10 cm^2$ is the cross-sectional area of the block

If we plug the data into the equation, we find the resistance of the silver block:
$R= \frac{(1.63 \cdot 10^{-6} \Omega \cdot cm)(10 cm)}{0.10 cm^2}=1.63 \cdot 10^{-4} \Omega$

3 0

4 years ago

What is gravitational potential energy?

Kay [80]

Answer:

D). energy resulting from the attraction between two masses.

Explanation:

4 0

3 years ago

The density of dry air at room temperature and atmospheric pressure Is 1.2 kg m-3. What volume would 6 kg of dry air occupy unde

larisa [96]

Answer:

V = 5 m³

Explanation:

The density of air, d = 1.2 kg/m³

Mass of the dry air, m = 6 kg

We need to find the volume o the gas. We know that, the density of an object is given by mass divided by its volume. So,

$d=\dfrac{m}{V}\\\\V=\dfrac{m}{d}\\\\V=\dfrac{6}{1.2}\\\\V=5\ m^3$

So, the volume of the dry air is 5 m³.

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3 years ago

What is social participation? Why is it important for socialization?

Phantasy [73]

It is the intervention of citizens in decision-making regarding the management of resources and actions that have an impact on the development of their communities.

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3 years ago