1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mamont248 [21]
3 years ago
13

A man has 60w bulbs and a 240w water heater in his apartment. If the bulbs and the water heater are switched on for four hours d

aily and the cost of electricity is N1.20 per KWh calculare his bill in 30 days
Physics
1 answer:
SVETLANKA909090 [29]3 years ago
3 0

Answer: N43.2

Explanation:

Given

Power consumption of bulb and water are 60\ W and 240\ W

If the Devices are on for four hours

Total power of devices 60+240=300\ W

Energy consumed for 4 hours is

\Rightarrow 300\times 4=1200 Wh\\\Rightarrow 1.2\ kWh

For 30 days it is 1.2\times 30=36\ kWh

Cost for 30 days 36\times 1.2=43.2\ N

You might be interested in
One similarity between work and power is that in order to calculate both you must know
svetoff [14.1K]
D.) In order to calculate both of them, we must know the "FORCE" on the system.
8 0
3 years ago
Read 2 more answers
A parallel plate air capacitor has a capacitance of 10 to the power -9. What potential difference is required for a charge of 5×
Maurinko [17]

The potential difference across the capacitor is 5 × 10∧4 volts and the energy stored in it is 1. 25 Joules

<h3>What is the energy in a capacitor?</h3>

The energy stored in a capacitor is an electrostatic potential energy.

It is related to the charge(Q) and voltage (V) between the capacitor plates.

It is represented as 'U'.

<h3>How to determine the potential difference</h3>

Formula:

Potential difference, V is the ratio of the charge to the capacitance of a capacitor.

It is calculated using:

V = Q ÷ C

Where Q = charge 5 × 10∧-5C and C = capacitance 10∧-9

Substitute the values into the equation

Potential difference, V = 5 × 10∧-5 ÷  10∧-9 = 5 × 10∧4 volts

<h3>How to determine the energy stored</h3>

Formula:

Energy, U = 1 ÷ 2 (QV)

Where Q= charge and V = potential difference across the capacitor

Energy, U = 1 ÷ 2 ( 5 × 10∧-5 × 5 × 10∧4)

= 0.5 × 25 × 10∧-1

= 0.5 × 2.5

= 1. 25 Joules

Therefore, the potential difference across the capacitor is 5 × 10∧4 volts and the energy stored in it is 1. 25 Joules

Learn more about capacitance here:

brainly.com/question/14883923

#SPJ1

6 0
2 years ago
Which has greater kinetic energy, a car traveling at 40 mph or a half-as-massive car traveling at 80 mph?
ziro4ka [17]

Answer:

The 80 mph car

Because the formula says 1/2 mass but for the velocity it is squared

8 0
3 years ago
Please answer ASAP!!!
NARA [144]
The third (left hand corner) since the x and y are both negative.
4 0
3 years ago
Calculate the kinetic energy of a moving 4 kg object traveling at a velocity of 3 m/a
Alina [70]

Answer:

Explanation:KE = 18 J

7 0
3 years ago
Other questions:
  • Without the wheels, a bicycle frame has a mass of 8.29 kg. Each of the wheels can be roughly modeled as a uniform solid disk wit
    13·1 answer
  • What is your understanding of repetition and replication in science?
    11·1 answer
  • Need help before 10pm tomorrow night
    8·1 answer
  • Tidal forces are gravitational forces exerted on different parts of a body by a second body. Their effects are particularly visi
    11·2 answers
  • A square coil of wire with side 8.0 cm and 50 turns sits in a uniform magnetic field that is perpendicular to the plane of the c
    15·1 answer
  • What does action force mean
    13·2 answers
  • A charge of 28 nC is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4 x 104 N
    12·1 answer
  • A cylinder has volume 50 cm and radius 4 cm find its volume. pls do it with the full process ​
    7·1 answer
  • A 2.0-kg mass is projected from the edge of the top of a 20-m tall building with a velocity of 24 m/s at some unknown angle abov
    13·1 answer
  • 4. What is the coefficient of x in the expression x + 3y + 2?<br> A. 0<br> B. 1<br> C. 2<br> D. 3
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!