In a parallel circuit with 3 resistors, the output voltage at the power supply is recorded to be 5 A. The current flowing through the first resistor is 1 A and the current flowing through the second resistor is .5 A. What is the current flowing through the third resistor?

Answers

Answer 1

Answer: In a parallel circuit, the total power supply current is the sum of the
currents through all of the individual branches.

The output current (not the voltage) of the power supply is 5 A.
So the individual currents in the circuit branches is 5 A.

The current through the first 2 resistors is (1 + 0.5) = 1.5 A.

So the current through the 3rd resistor is (5 - 1.5) = 3.5 A.

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In 3.0 seconds, a wave generator produces 15 pulses that spread over a distance of 45 centimeters. Calculate its period.0.022 s

0.066 s

0.20 s

0.33 s

Answers

Period = (time) / (number of pulses)

= (3 sec) / (15 pulses)

= 0.2 sec/pulse

Which type of bond will sulfer (S) and nitrogen (N) form?a. metallic bond
b. covalent bond
c. iconic bond

Answers

Answer:

In ionic compounds, electrons are transferred between atoms of different elements ... For example, two hydrogen atoms bond covalently to form an H2 molecule; each ... is released when one mole of H2 molecules forms from two moles of H atoms: ... atom in each pair is more electronegative: (a) N or P. (b) N or Ge. (c) S or F.

Explanation:

What are examples of devices that use electromagnetic waves

Answers

Radio waves, microwaves, visible light and X Rays.

Race car drivers must slow down as they make turns on the track. This is best explained by the law of inertia. Which statement best describes inertia for the car going around a turn? A) A body in motion stays in motion at the same speed.
B) The speed of the car going into the turn must be conserved.
C) The speed around a turn is proportional to the radius of curvature of the turn.
D) A body in motion tends to continue in a straight line and requires a force to turn.

Answers

Answer:

D) A body in motion tends to continue in a straight line and requires a force to turn.

Explanation:

A body in motion tends to continue in a straight line and requires a force to turn. Also, If no force is applied the race cars will keep moving in a straight line at constant speed and this will definitely lead to an accident/breakdown.

It was D! I took a test on this and it was right.

A spring gains 2.34 joules of elastic potentialenergy as it is compressed 0.250 meter from its
equilibrium position. What is the spring constant
of this spring?
(1) 9.36 N/m (3) 37.4 N/m
(2) 18.7 N/m (4) 74.9 N/m

Answers

The correct answer to the question is: 4) 74.9 N/m.

EXPLANATION:

As per the question, the stretched length of the spring is given as x = 0.250 m.

The potential energy gained by the spring is given as 2.34 joules.

We are asked to calculate the spring constant of the spring.

The potential energy gained by the spring is nothing else than the elastic potential energy .

The elastic potential energy of the spring is calculated as -

Potential energy P.E = $(1)/(2)kx^2$

⇒k = $(2P.E)/(x^2)$

= $(2* 2.34)/((0.250)^2)\ N/m$

= 74.88 N/m

= 74.9 N/m. [ans]

Hence, the force constant of the spring is 74.9 N/m.

Elastic energy equals 1/2 k(spring constant) *Δx^2(change in position) so you set the energy of the spring equal to the 1/2kΔx^2 and solve for K. 2.34=1/2k(.250)^2 which gives you a spring constant of 74.9 N/m.

You drive your car for 2.0 h at 40.0 km/h then for 2.0 h at 60.0 km/h what is your average velocity?

Answers

In order to calculate velocity, we'd need to know the straight-line distance between the start and the finish, and we'd also need the direction of that line. The best we can do with the information given in the question is calculate the average SPEED.

Average speed = (total distance covered) / (time to cover the distance).

Distance covered in the first 2 hours = (2 hr) x (40 km/hr) = 80 km.
Distance covered in the second 2 hours = (2 hr) x (60 km/hr) = 120 km.

Total distance covered = (80 + 120) = 200 km
Time to cover the distance = (2 + 2) = 4 hours

Average speed = (200 km) / (4 hours) = 50 km/hour

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