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3 years ago

B h combining g two hydrogen atoms ans one oxygen atom for a molecule of water is made from

1 answer:

5 0

The correct answer to this question is this one:

By definition, if a molecule is composed of two hydrogen atoms and one oxygen atom, that molecule is a water.<span> In fact, the structure of water is written as H20, which signifies that two hydrogen (H) atoms and one oxygen (O) atom make up the molecule.</span>

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Neil studied how a pulley helps move an object. Neil tied a rope to an object with a mass of 10 kilograms (kg) and attached it t

SashulF [63]

Answer:2

Explanation:

Given

mass of object $m=10\ kg$

weight of object $=mg$

Weight $=10\times 9.8$

If body is being pulled with constant velocity then the net force on body is zero i.e.

Force=weight of object

$F=98\ kg$

force is equal to weight of object

option 2 is correct

3 0

3 years ago

Two trucks travel at the same speed. They are far apart on adjacent lanes and approach each other essentially head-on. One drive

kow [346]

Answer: 19.72m/s

Explanation:

Since we are considering the speed, the C in the formula can as well be represented with other letter V as one choses.

8 0

4 years ago

A 0.18-kg turntable of radius 0.32 m spins about a vertical axis through its center. A constant rotational acceleration causes t

borishaifa [10]

Answer:

Angular acceleration will be $18.84rad/sec^2$

Explanation:

We have given that mass m = 0.18 kg

Radius r = 0.32 m

Initial angular velocity $\omega _i=0rev/sec$

And final angular velocity $\omega _f=24rev/sec$

Time is given as t = 8 sec

From equation of motion

We know that $\omega _f=\omega _i+\alpha t$

$24=0+\alpha \times 8$

$\alpha =3rev/sec^2=3\times 2\times \pi rad/sec^2=18.84rad/sec^2$

So angular acceleration will be $18.84rad/sec^2$

4 0

4 years ago

What is an ideal machine?

Svetlanka [38]

An ideal machine is one in which no part of the input energy to the machine gets wasted and the whole input energy is converted into the useful work. The <span>efficiency of such a machine is 100%.

i really hope this helps!</span>

5 0

3 years ago

A 30000 grams boy is riding a merry-go-round with a radius of 600 cm. What is the centripetal force and acceleration on the boy

irga5000 [103]

Answer:

centripetal force is calculated by mass(kg) × tangetial velocity(m/s) ÷ radius (m)

Explanation:

so 30000g= 30kg

50km/h = 13.88m/s

600cm= 6m

30×13.88÷6= 69.4N

N= Newton's

hope this helps.

btw I'm 16 and love physics so I tried my best in this hope it went well!!

7 0

3 years ago