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3 years ago

Why is push-ups more harder than curl ups?

1 answer:

3 0

Push ups are harder because when doing pushups you are building your muscle strength by pushing up and going down but curl ups you are on the floor and using your body to help pull yourself up each time you go up and down

You might be interested in

Why does the density of a substance remain the same for different amount of the substance

tresset_1 [31]

Think of it this way:
-- Any time you have something that means (some number) PER UNIT,
it doesn't matter how many units there are on the table or in the bucket,
because that amount doesn't change the (number) PER UNIT.

-- If oranges cost $1 PER POUND, it doesn't matter how many pounds
you buy, the whole bagful is still $1 PER POUND.

-- If a certain salad dressing has 40 calories PER Tablespoon, it doesn't
matter whether you eat a drop of it or drink the whole jar. You still get
40 calories PER Tablespoon.

-- Density means '(mass) PER unit of volume'. Whether you have a tiny
chip of the substance or a whole truckload of it, there's still the same
amount of mass IN EACH unit of volume.

6 0

4 years ago

What types of stars end their lives with supernovae?

miskamm [114]

The type of star is the north star

4 0

3 years ago

During fabrication processes, polymeric materials are generally subjected to which of the following conditions? The ambient temp

geniusboy [140]

Answer:

- Elevated temperatures.

- Elevated pressures.

Explanation:

In the manufacture of plastic products are used:

Raw material (pellets) which are the monomers that promote the chemical reaction.

To these are added the charges, in order to reduce the cost of the final product and improve some properties. These charges can be fiberglass, paper, metal structures.

Additives are also added whose mission is to improve or achieve certain properties, such as reducing friction, reducing chemical degradation, increasing electrical conductivity, coloring the product, and all this happens in the presence of a catalyst that is responsible for initiating and accelerating the chemical reaction process.

There are different methods of production of plastics, one of the most frequent is by injection.

Injection is a process that is carried out on machines similar to extrusion machines, in which the spindle, in addition to rotating, has an axial displacement.

In the injection, once the mold is filled, it is separated from the nozzle of the machine, breaking the feed channel. After a certain time, the piece already cooled is demoulded.

High pressures and temperatures are necessary, but parts of good finish and at high production speeds are obtained

3 0

4 years ago

Drag racing cars are very elongated with the front wheels placed very far away from the rear wheels. This placement helps keep t

anygoal [31]

Answer:

Explanation:

Now for this kind of phenomena in which drag cars are very elongated with front wheels placed far away from the rear wheels resulting in keeping the car front end from nosing upward,this is due to the reason because it helps in shifting the center of mass towards the front.

Hence when the car accelerates

torque due to gravity = torque due to air friction

8 0

3 years ago

Mona's grandfather had been complaining of poor vision for many days. One day Mona took him to the eye specialist and got his ey

Ostrovityanka [42]

Answer:

The problem with her grandfather's eye can be long sightedness and short sightedness

Explanation:

Given that,

Mona's grandfather had been complaining of poor vision for many days.

We know that,

Refractive eye surgery is small surgery.

We need to find the problem with her grandfather's eye

Using given data,

Mona's grandfather had been complaining of poor vision for many days.

So, the doctor did refractive eye surgery of her grandfather's eye.

Due to this surgery, Mona's grandfather can see things clearly.

Refractive eye surgery is a method for correcting vision.

This surgery used for better vision.

This surgery is possible for long sightedness and short sightedness.

Hence, The problem with her grandfather's eye can be long sightedness and short sightedness

3 0

4 years ago