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4 years ago

What kinds of ions do acids and bases form in water

Physics

1 answer:

Vesnalui [34]4 years ago

5 0

H+ ions? I'm guessing but I'm pretty sure that's it

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4. Which of the following would be a good reference point to describe the motion of a dog?

saul85 [17]

ANOTHER RUNNING DOG

Explanation:

In the given question it is to find a suitable reference point to describe the motion of dog. Here I could suggest that it is better to compare the dog with another running dog to create the relative speed difference to get a reliable motion variation.

Because the motion of dog is in the linear with respect to the another dog and to the acceleration produced by the dog in the required interval is easy to calculate with respect to another dog which is already in motion.

Hence, I suggest that Motion of dog can be analysed better by analyse the motion variation of dog with another dog running.

4 0

3 years ago

ΡΟ. . When preparing for any of the golf variation games (golf foot golf, disc golf), a person should consider the following bef

attashe74 [19]

Answer:

All of the above

Explanation:

To ensure the ball go to where we expected it go

5 0

3 years ago

A example of using a muscular strength?

DIA [1.3K]

An example of using muscular strength would be doing things like lifting weights and things like that.

7 0

3 years ago

Read 2 more answers

Two long parallel conductors carries I1 and I2 in opposite directions. Determine the magnetic field between the wires

Eddi Din [679]

Answer:

B1 = μ_o•I1/2πr

Explanation:

According to the right hand rule, we can say that the magnetic field at the second wire due to the current being carried in first wire is given by;

B1 = μ_o•I1/2πr

Where;

r is distance that separates the two wires

μ_o is a constant known as permeability of free space

I1 is current in wire 1

8 0

3 years ago

A 50-gram ball is released from rest 80 m above the surface of the Earth. During the fall to the Earth, the total thermal energy

Nady [450]

Answer:

Speed of ball just before it hit the surface is 31.62 m/s .

Explanation:

Given :

Mass of ball , m = 50 g = 0.05 kg .

Height from which it falls , h = 80 m .

Thermal energy , E = 15 J .

Now , Initial energy of the system is :

$E_i=\dfrac{mv^2}{2}+mgh$

Here , initial velocity is zero .

Therefore , $E_i=mgh=40\ J$

Now , final energy of the system :

$E_f=\dfrac{mv^2}{2}+mg(0)+15\\\\E_f=\dfrac{0.05\times v^2}{2}+15$

Since , no external force is applied .

Therefore , total energy of the system will be constant .

By conservation of energy :

$E_i=E_f\\40=\dfrac{0.05v^2}{2}+15\\\\25=\dfrac{0.05v^2}{2}\\\\v=31.62\ m/s$

Therefore , speed of ball just before it hit the surface is 31.62 m/s .

3 0

3 years ago