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
Allushta [10]
3 years ago
5

The Kelly family and the Garcia family each used their sprinklers last summer. The water output rate for the Kelly family's spri

nkler was 35L per hour. The water output rate for the Garcia family's sprinkler was 20L per hour. The families used their sprinklers for a combined total of 45 hours, resulting in a total water output of 1350L. How long was each sprinkler used?
Physics
1 answer:
elena55 [62]3 years ago
3 0

Answer:

30 hours

15 hours.

Explanation:

Let the Kelly used sprinkler for t hours and Gracia used the sprinkler for the rest ie (45 - t) hours .

Water output by Kelly = (35 x t) L

Water output by Gracia = 20 ( 45 - t ) L

Total output = 35t + 20(45 - t)

So,  35 t + 20 (45 - t ) = 1350

35 t + 900 - 20 t = 1350

15 t = 450

t = 30 hours

So Kelly used sprinkler for 30 hours and Gracia used it for 45 - 30 = 15 hours.

You might be interested in
Ten identical steel wires have equal lengths L and equal "spring constants" k. The Young's modulus of each wire is Y. The wires
svlad2 [7]

Answer:

option (B)

Explanation:

Young's modulus is defined as the ratio of longitudinal stress to the longitudinal strain.

Its unit is N/m².

The formula for the Young's modulus is given by

Y=\frac{F \times L}{A\times \delta L}

where, F is the force applied on a rod, L is the initial length of the rod, ΔL is the change in length of the rod as the force is applied, A is the area of crossection of the rod.

It is the property of material of solid. So, when the 10 wires are co joined together to form a new wire of length 10 L, the material remains same so the young' modulus remains same.

8 0
2 years ago
What is the law of conservation of energy?
charle [14.2K]
The law of conservation of energy<span>, a fundamental concept of physics, states that the total amount of </span>energy<span> remains constant in an isolated system. It implies that </span>energy<span> can neither be created nor destroyed, but can be change from one form to another.</span>
6 0
2 years ago
Which best describes a chemical reaction? the rearrangement of atoms by breaking and reforming chemical bonds a reaction that ab
Ede4ka [16]

Answer:

A

Explanation:

5 0
3 years ago
Read 2 more answers
A student says that a speed of 50 m/s is faster than a speed of 140 km/h because the number is bigger. What would you say to the
ladessa [460]

The units are not consistent - 1 m/s is not the same as 1 km/h.

First thing to do would be to convert from one unit of speed to the other, say km/h to m/s. There are 1000 meters (m) for every kilometer (km) and 3600 seconds (s) for every hour (h), so

1\,\dfrac{\mathrm{km}}{\mathrm h}\cdot\dfrac{10^3\,\mathrm m}{\mathrm{km}}\cdot\dfrac{\mathrm h}{3600\,\mathrm s}\approx0.278\,\dfrac{\mathrm m}{\mathrm s}

So in fact 1 km/h is about 4 times slower than 1 m/s.

4 0
2 years ago
Name arleady three types of energy associated with a microwave
Elena L [17]
I'm pretty sure what you are trying to ask for is radiative energy, light energy, and electronic energy
<span>Radiative since the microwave is releasing radiation </span>
<span>Light since there is light inside the microwave.</span>
Electronic since it is plugged in and uses electricity.
<span>You can also use sound, but I don't think every microwave makes sound. </span>
6 0
2 years ago
Other questions:
  • If you could find the coldest object on Earth, you would find that it _________.
    14·2 answers
  • The scientific method is
    9·2 answers
  • Planet Tatoone is about 1.7 AU from its Sun. Approximately how long will it take for light to travel from the Sun to Tatoone in
    6·1 answer
  • A force of 10 lb is required to hold a spring stretched 4 in. beyond its natural length. How much work W is done in stretching i
    13·2 answers
  • Although blood cells are contained within a special liquid called plasma, the cells themselves are___________.
    6·1 answer
  • A conventional current of 7 A runs clockwise in a circular loop of wire in the xy plane, with center at the origin and with radi
    10·1 answer
  • I really need help for this question
    11·1 answer
  • What is a frame of reference? how is it used to measure motion? ​
    7·1 answer
  • Discuss why Wolpert says we have a brain.
    7·2 answers
  • A resistor has a resistance of 50 Ohms. If a 9V battery is connected to it, how much current flows in the wire?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!