Physics Answers

Plot a graph of over damped oscillation with values in MS Excel.

Plot a graph of under damped oscillation with values in MS Excel.

1. Eight groups of cells are in parallel. Each group consists of  four cells, each of emf 4 V and internal resistance 0.5 Ώ, In series. Determine the power supplied to 4 Ώ resistor by this battery system

Consider a series circuit including a 4Ω, a 16mH-inductor, and a power supply of 9 volts.

Find the current in the circuit 100μs after the switch is closed?

A 210-kg spacecraft crash-landed on a desert with a velocity of 311 kph and ended up 0.810 m underneath the soil.

a. Draw a free-body diagram for the spacecraft.

b. Determine the spacecraft’s velocity in m/s.

c. Solve the spacecraft’s acceleration

d. Determine the force the ground exerted on the spacecraft during the crash landing

e. Solve the duration of the crash

A father lifts a toddler 1.5 m up in the air. The child gains 187.5 J of energy in her gravitational potential energy store as a result. What is the mass of the toddler? Give your answer to 1 decimal place. (Assume that the gravitational field strength is 10 N/kg.)

Determine approximately the ratio of the probability of spontaneous emission

to the probability of stimulated emission at room temperature in (a) X-ray

region of the EM spectrum (b) the visible region (c) the microwave region.

.A crate of mass 10kg is pulled up arough incline with an initial speed of 1.5m/s. the pulling force is 100N parallel to the incline which makes an angle of 30° with the horizontal. the coefficient of kinetic friction is 0.4 and the crate is pulled 5m.

a.How much work is done by gravity?

b.how much mechanical energy is lost due to friction?

c.what is the change in kinetic energy of the crate?

d. What is the speed of the crate after being pulled by 5m?

cocnsider the combination of two capacitors C1 and C2 with C2>C1 when connected in parallel , the equivalent capacitance is 8 times the equivalent capacitance of the same connected in series. calculate the ratio of capacitors, C2/C1.

an inclined plane making an angle of 30° with the horizontal placed in a uniform horizontal electric field 200N/C. A body of mass 1kg and a charge 5mC is allowed to slide down from a rest at a height of 1m. if the coefficient friction is 0.2, find the time taken to reach the bottom.