Imagine that you have a rectangular swimming pool, but you have no idea how deep it is. You know that the pool has a volume of 216 m3 . You measured the dimensions of the pool and found that it is 15 m long and 6 m wide. A. Calculate the depth of the pool. Show your work.

Answers

Answer 1
Answer: volume of any rectangle cuboid such as a pool length*width*height
and area is length*width

Now, volume/area=height

height=216/90
height=2.4m

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What happens when there is a change in pressure at any point in a fluid
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Which two wire properties would provide the greatest resistance to the flow of a current?
A metal object is suspended from a spring scale. The scale reads 930 N when the object is suspended in air, and 731 N when the object is completely submerged in water. Find the volume of the object. The acceleration of gravity is 9.8 m/s 2 . Answer in units of m3 .
At the local grocery store, you push a 14.5-kg shopping cart. You stop for a moment to add a bag of dog food to your cart. With a force of 12.0 N you now accelerate the cart from rest through a distance of 2.29 m in 3.00 s. What was the mass of the dog food?

Nuclear energy can be used to power _______.a. street lights
b. 4es
c. homes
d. all of the above

Answers

Nuclear power plants produce radioactivewaste that must be stored properly. It is very impossible for a nuclear power plantto have no waste at all since lots of chemicals are used to create the processas it gives energy to other machines. Nuclear energy can be used to power allof the above choices. Radioactive waste can not be released into local watersupplies since the wastes are very radioactive and may cause mutation to thefishes and bioaccumulation which will affect humans as well. It will also causeair pollution if the chemicals are not stored properly.

Does a light bulb with a greater wattage have a greater brightness

Answers

Only within the same technology. / / / If both of the bulbs you're comparing are incandescent, or both fluorescent, or both CFL, or both LED, then the one that uses more power is brighter. But a CFL with the same brightness as an incandescent bulb uses less power, and an LED bulb with the same brightness as both of those uses less power than either of them.
Yes. If a lamp develops a higher power certainly produce more luminosity, more brightness.

Statistics used to analyze sample data in order to make conclusions about a population are called __________ statistics.A.
nondirectional
B.
directional
C.
inferential
D.
descriptive

Answers

Option C. inferential statistics

Trying to reach conclusions that extend beyond immediate data alone. This is used also in making judgments of the probability that an observed difference between groups is a dependable one. Therefore, using this is to arrive an inferences from our data in a more general conditions.

the answer is c its the only one that seems right

A car of mass 1330 kg is traveling at 28 m/s.  The driver applies the brakes to bring the car to rest over a distance of 79 m. Calculate the force acting on the car.

Answers


you could use SUVAT to work out the deceleration and then use F=ma

S= 79m U=28m/s V=0m/s A=? T=n/a

V^2 = U^2 + 2AS  so 0 = 28^2 + 158A  so -158A = 784

A= 4.962 (3dp)

so F = ma = 4.962 *1330 = 6599.494N (3dp)

Which change decreases the resistance of a pieceof copper wire?
(1) increasing the wire’s length
(2) increasing the wire’s resistivity
(3) decreasing the wire’s temperature
(4) decreasing the wire’s diameter

Answers

Explanation :

We know that the resistance of the wire is given by :

R=\rho (l)/(A)

Where

\rho is the resistivity

l is the length of the wire

A is the area of the wire.

Another factor on which the resistance of wire depends is temperature. It is given by :

R=R_(ref)[1+\alpha (T-T_(ref))]

So, it is clear that the resistance of the wire is directly proportional to the temperature. It we want to decrease the resistance of the piece, its temperature should be decreased.

So, the correct option is (3) " decreasing the wire’s temperature ".

Decreasing the wire’s temperature decreases the resistance of a piece of copper wire.

What is resistance?

Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.

The relation of resistance with length and thickness is given by ;

\rm R= (\rho L)/(A)

The value of resistance is directly propotional to length and inversly propotional to the area or thickness of the wire.

As the value of temperature increases, the value of resistance in the material is increasing. Length, temperature, and thickness are the factors that affect the resistance of a material.

Resistance of the wire is directly propotional to the temperature. On decreasing the temperature the resistance of the wire is also decreasing.

Hence decreasing the wire’s temperature decreases the resistance of a piece of copper wire.

To learn more about the resistance refer to the link;

brainly.com/question/20708652

What does the measurement 6.5 V represent? A. Electric field B. Electric potential C. Electric potential energy D. Electric force

Answers

Option B. Electric potential.

V means volts and is the unit defined for the electric potential or voltage.

Answer:

B. Electric potential

Explanation: