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4 years ago

Which statement best describes an atom?

Physics

1 answer:

Sergeu [11.5K]4 years ago

6 0

Answer:

c. a group of protons and neutrons that are surrounded by electrons

Explanation:

protons and neutrons form the nucleus while the electrons orbit around the nucleus

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A gas cylinder contains argon atoms (m=40.0 u). The temperature is increased from 286 K (13°C) to 362 K (89°C) (a) What is the c

Rama09 [41]

Answer:

(a). The change in the average kinetic energy per atom is $1.57\times10^{-21}\ eV$ .

(b). The change in vertical position is 2413 m.

Explanation:

Given that,

Mass = 40.0 u

The increased temperature from 286 K to 362 K.

(a). We need to calculate the change in the average kinetic energy per atom

Using formula of kinetic energy

$\Delta K.E=\dfrac{3}{2}k\Delta t$

Put the value into the formula

$\Delta K.E=\dfrac{3}{2}\times1.38\times10^{-23}\times(362-286)$

$\Delta K.E=1.57\times10^{-21}\ eV$

(b). The change in potential energy of the container due to change in the vertical position

We need to calculate the change in vertical position

Using formula of potential energy

$\Delta U=mg\Delta h$

$\Delta h =\dfrac{\Delta U}{mg}$

$\Delta h=\dfrac{1.57\times10^{-21}}{40.0\times1.66\times10^{-27}\times9.8}$

$\Delta h=2412.7=2413\ m$

Hence, (a). The change in the average kinetic energy per atom is $1.57\times10^{-21}\ eV$ .

(b). The change in vertical position is 2413 m.

4 0

4 years ago

the headlamp of a car takes a current of 0.4 ampere from a 12 volt supply. the energy produced in 5 minutes is

serg [7]

Voltage (V) = 12 v
Current (I) = 0.4 A
Time (t) = 5min = 300sec

Power = Voltage x Current
= V x I
= 12 x 0.4
Power = 4.8wats = 4.8W

Power = Energy / Time
Energy = Power x Time
Energy = 4.8 x 300
Energy = 1440 joules
Final answer : 1440J

5 0

2 years ago

What's the equation for voltage

Feliz [49]

Http://www.sengpielaudio.com/calculator-ohm.htm

8 0

3 years ago

WILL GIVE BRAINLIEST!!

Ganezh [65]

Potential Energy
Potential energy is the energy an object has because of its position to move. Gravitational potential energy can be calculated by multiplying the mass of an object, the gravitational pull, and the height of the object together. In our project the weights, cups, marbles and dominos all have a potential energy as well as other objects.

Kinetic Energy
Kinetic energy is energy due to motion. To calculate this, use the equation KE=0.5mv^2. The work, potential energy, and kinetic energy of an object will always be equal to eat other. Kinetic energy can be calculated by any objects in motion on the machine, such as the marbles, car, and the dominos.

SRY I HAVE ONLY THIS MUCH OF INFORMATION ABOUT THIS............I ONLY HOPE THAT THIS WILL HELP YOU MATE.......

5 0

3 years ago

Now solve the differential equation V(t)=−CRdV(t)dt for the initial conditions given in the problem introduction to find the vol

mina [271]

Answer:

V(t) = (q0/C) * e^(−t/RC )

Explanation:

If there were a battery in the circuit with EMF E , the equation for V(t) would be V(t)=E−(RC)(dV(t)/dt) . This differential equation is no longer homogeneous in V(t) (homogeneous means that if you multiply any solution by a constant it is still a solution). However, it can be solved simply by the substitution Vb(t)=V(t)−E . The effect of this substitution is to eliminate the E term and yield an equation for Vb(t) that is identical to the equation you solved for V(t) . If a battery is added, the initial condition is usually that the capacitor has zero charge at time t=0 . The solution under these conditions will look like V(t)=E(1−e−t/(RC)) . This solution implies that the voltage across the capacitor is zero at time t=0 (since the capacitor was uncharged then) and rises asymptotically to E (with the result that current essentially stops flowing through the circuit).

8 0

3 years ago