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3 years ago

How many electrons in Cu

Physics

1 answer:

boyakko [2]3 years ago

3 0

Answer:29 electrons

Explanation: If you look on a periodic table, the atomic number is the amount of electrons it has.

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A massive truck of 1200N moving with a velocity of 2m/s hits a stationary mass of 30N. if the both bodies move together after th

kicyunya [14]

Answer:

The common speed is 1.95 m/s

Explanation:

Law Of Conservation Of Linear Momentum

It states that the total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and velocity v is

P=mv.

If we have a system of bodies, then the total momentum is the sum of all of them:

$P=m_1v_1+m_2v_2+...+m_nv_n$

If a collision occurs, the velocities change to v' and the final momentum is:

$P'=m_1v'_1+m_2v'_2+...+m_nv'_n$

In a system of two masses, the law of conservation of linear momentum

is written as:

$m_1v_1+m_2v_2=m_1v'_1+m_2v'_2$

If both masses stick together after the collision at a common speed v', then:

$m_1v_1+m_2v_2=(m_1+m_2)v'$

The common velocity after this situation is:

$\displaystyle v'=\frac{m_1v_1+m_2v_2}{m_1+m_2}$

The truck of m1=1200 N (weight) travels at v1=2 m/s and hits a stationary mass (v2=0) of m2=30 N (weight). After the bodies collide, they keep moving together. Before we can calculate the common speed, we need to calculate the masses of the bodies, since they are given as weights.

$m_1=\frac{P_1}{g}=\frac{1200}{9.8}=122.45 Kg$

$m_2=\frac{P_2}{g}=\frac{30}{9.8}=3.06 Kg$

Now calculate the common speed:

$\displaystyle v'=\frac{122.45 * 2+3.06 * 0}{122.45+3.06}$

$\displaystyle v'=\frac{244.9}{125.51}=1.95\ m/s$

The common speed is 1.95 m/s

7 0

3 years ago

Draw a graph of the voltmeter reading versus ammeter readings.

bearhunter [10]

The VI graph helps us to find Resistance.

It was used by Ohm which is well known as ohms law.

4 0

3 years ago

Help needed Can a body be accelerating if it is moving in circle

belka [17]

Answer:

When a body is moving on a circle it is accelerating because centripetal acceleration is always acting on it towards the center.

Please see the attached picture...

From the above diagram,we can say the acceleration is always acting on the body when it moves in a circle.

Hope this helps.......

Good luck on your assignment.......

5 0

3 years ago

Read 2 more answers

A neutron star is moving in outer space at 4,000 km/hr. What happened to the star that set it in motion on it's current course?

astra-53 [7]

Answer:

a balanced force acted on it and propelled it to 4,000 km/hr

Explanation:

For the neutrons star which is moving in outer space at 4,000 km/hr, it could only be possible as a result of the balanced force which had already acted on it. This is based on newton's law of motion which states that 'To every action, there is equal and opposite reaction'.

4 0

3 years ago

Electricity seems like a fundamental element in the construction of any home. However, to have electricity run into and out of a

olganol [36]

Answer:

•Most of the components that make up curcuits are conductors. Electricity flows easily thought conductors such as metal or water.Electricity does not flow easily thought insulators such as wood or rubber.

•When a battery is used to power a circuit, the circuit the current must travel from one pole of the battery to the opposite battery.

•Resisotors show the flow of Electricity throught a circuit this can prevent components of the circuit from 'brning out'. In a curcuit diagram, resistors are represented by bending lines.

Explanation:

8 0

3 years ago

How many electrons in Cu​

How many electrons in Cu