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State assumptions made about the motion of the molecules in a gas in the derivation of the kinetic theory of gases equation.

The molecules move in random motion. Collisions of molecules with each other and with the walls are elastic (total kinetic energy stays constant). Time in contact is small compared with time between colli...

Answered by Marina J. • Physics tutor

6002 Views

If a car sets off from rest with a constant acceleration of 3 m/(s^2), what would its speed be after 5 seconds?

Firstly we write down all known variables: Initial speed (u)=0 m/s, Acceleration (a)=3 m/s², Time (t)=5s. Final velocity (v)=?Therefore, the equation chosen to solve the problem would be: v=u+a...

Answered by Shahnaan M. • Physics tutor

1960 Views

Why do atoms larger than iron release energy when they undergo fission?

For this problem we need to consider the strong nuclear force (SNF), and the electromagnetic force (EMF). Recall that the SNF attracts very strongly over very small distances (≈10^-15m), and the...

Answered by Henry B. • Physics tutor

2451 Views

2 Capacitors (c1 = 500mf) and (c2=300mf), are connected in parallel to a 10v d.c supply. Calculate the total capacitance of the circuit, and hence the total energy stored in the capacitors.

Use the equation Ct = C1 + C2, 500mF + 300mF = 800mF or 800x10^-3F
2) Appropriate equation is W=1/2 V^2 C
W = (0.5)*(10^2)*800^-3 = 40J

Answered by Samuel M. • Physics tutor

2040 Views

Define electric potential at a point in an electric field.

The electric potential at a point in an electric field is the work done per unit charge when a point positive charge is moved from infinity to the point.

Answered by Tutor143011 D. • Physics tutor

12740 Views