The force against a solid object moving through a gas or a liquid

Answers

Answer 1

Answer: This drag force is always opposite to the object's motion, and unlike friction between solid surfaces, the drag force increases as the object moves faster.

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0.00000231 in scientific notation is
Which of these is NOT an example of work? A. Holding a heavy book B. Pushing a wheelbarrow C. Lifting weights
4 newtons, 4 amps, 4 joules, 4 watts, 4 ohms, 4 voltswhat does I=
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If a machine could be made that had 100% mechanical efficiency, it would be called an _____________________________.

Answers

It would OUTPUT exactly enough energy to pour back into its INPUT and
keep itself running. It would be called an "Perpetual Motion" machine.

It would be completely useless, however, as anything but a curiosity
to be stared at. If you ever tried to make it actually DO anything besides
keep itself running, it would run down and stop, because you had taken
energy out of it.

What you need in order to turn the world upside down is a machine that
has 101% mechanical efficiency ... enough energy coming out of it to
keep itself running AND have a little bit left over, that you can take and
do other things with.

Such a machine would need to create energy inside itself, which
everybody knows is not possible.

How can you calculate distance when given power, time, and mass?Power used to lift crate is 3490, mass of crate is 425 kg, time is 3 seconds. How far was the crate lifted?

Answers

First step:   Power = (work done) / (time to do the work).

   3490 watts = (work done) / (3 seconds)

   3490 joules/second = (work done) / (3 seconds)

Multiply each side by 3 seconds:

   Work done = (3490 x 3) joules = 10,470 joules

Second step:    Weight = (mass) x (gravity)

   Weight of the crate = (425 kg) x (9.8 m/s²)

= 4165 newtons

Step 3: Work done = (force) x (distance)

   = (weight) x (distance lifted)

10,470 joules = (4165 newtons) x (distance)

Divide each side by 4165 newtons:

   Distance = 10,470 kg-m²/sec² / 4165 kg-m/s²

   =    2.514... meters (rounded)

You asked: "How can you calculate ... ?"
Notice that I did the same thing in all 3 steps ... write down the formula
for finding a quantity, then write the numbers you know into the formula
to find the quantity.

THAT's "how", and it all boils down to knowing the formulas and picking
the right one to work with. The right one to pick is the one that talks about
all (or most) of the quantities that you know AND the quantity that you're
trying to find.

For example, if you need to find how long it will take your turtle to walk
across the room, then you need a formula that talks about time, speed,
and distance. You would not get much help from the formula that talks
about the pressure and volume of a gas, or one that talks about the
frequency and wavelength of light waves, or Einstein's formula E=mc²
for the equivalency of mass and energy.

What determines the chemical properties of an element? A. the number and arrangement of the electrons in an atom B. the number of neutrons and protons in an element C. the arrangement of all the neutrons, protons, and electrons D. the atomic mass of an atom

Answers

The sum of the protons and neutrons in an atom equals the mass number.

the answer would be A. the number and arrangement of the electrons in an atom

ik bc i took the test

What happens to the density of ocean water when salinity increases? A. It increases. B. It decreases. C. It becomes variable. D. It doesn't change.

Answers

A. It increases... but slightly. Good luck!

Answer:

Explanation:

Imagine that a brown horse and a white horse cross to produce offspring whose coat is made up of some brown hair and some white hairs. Which pattern of dominance is this an example of this

Answers

Answer:

Codominace

Explanation:

Codominance simply refers to a situation whereby there is an equal genetic effect of two parents on their offspring. It is a situation whereby neither of the alleles (i.e. a variant or type of gene) of the two parents can dominate, mask or prevent the expression of the other. Consequently, this will result on the equal expression of the two alleles for trait of the two parents.

Using the human example, there is a codominance when there is the ABO blood group which permits both alleles A and B to be expressed. As a result, if alleles A is inherited by a child from his father and he inherited allele B from his mother, it will result in him having AB as his blood type.

Therefore, the pattern of dominance is the example given in the question is called "codominance."

This is an example of Co dominance.

Which is the SI base unit for distance?

A. cm

B. km

C. m

D. mm

I think its C.m

Answers

Yes you're correct. For distance, SI is based on meters.

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