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DanielleElmas [232]
3 years ago
15

An object has a charge of 4.5 c is it negative or positive

Physics
2 answers:
Dmitry [639]3 years ago
7 0
This is a positive charge.
Westkost [7]3 years ago
5 0
It has a positive charge
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a person walks 750m due north then 250 m due east of the entire walk takes 12 min find the person average velocity​
Virty [35]

Answer:

v = 1.098 m/s

Explanation:

Given that,

A person walks 750m due north then 250 m due east of the entire walk takes 12 min.

We need to find the average velocity of the person.

Displacement,

d=\sqrt{750^2+250^2} \\\\d=790.56\ m

Average velocity = displacement/time

v=\dfrac{790.56\ m}{12\times 60\ s}\\\\v=1.098\ m/s

So, the average velocity of the person is 1.098 m/s.

6 0
3 years ago
The formula v=fλ describes how sound can change. Please explain what these components are, and how they affect one another.
Svetlanka [38]

Answer:

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

An electromagnetic spectrum refers to a range of frequency and wavelength that an electromagnetic wave is distributed or extends. The electromagnetic spectrum comprises of gamma rays, visible light, ultraviolet radiation, x-rays, radio waves, and infrared radiation.

Wavelength can be defined as the distance from one peak to the next peak. Also, this distance is equal to the distance from one trough of a wave to another.

Mathematically, the speed of a wave is given by the formula;

V = fλ

Where;

V is the speed of the wave.

f is the frequency of the wave.

λ is the wavelength of the wave.

The speed of a wave (wave speed) is directly proportional to the frequency of a wave.

This ultimately implies that, an increase in the speed of a wave would cause an increase in the frequency of a wave and vice-versa.

8 0
2 years ago
Water waves in a small tank are .06 m long. They pass a given point at a rate of 14.8 waves every three seconds. What is the spe
snow_lady [41]

Answer:

Speed = 0.296m/2

Period = 0.203 s

Explanation:

If by 'long' you mean the wavelength of the waves, then the wavelength \lambda=0.06m.

The frequency f of the waves is 14.8 waves every 3 seconds or

f=14.8/3 =4.33Hz.

Now the relationship between wavelength \lambda, frequency f and speed v of the waves is:

v=\lambda f

We put in the values \lambda=0.06m and f=4.933Hz and get:

\boxed{v=0.06*4.922=0.296m/s}

Now the period T is just the inverse of the frequency, or

T=\frac{1}{f}

\boxed{T=\frac{1}{4.933}=0.203\:seconds }

4 0
3 years ago
A rifle with a mass of 0.9 kg fires a bullet with a mass of 6.0 g (0.006 kg). The bullet moves with a muzzle velocity of 750 m/s
SCORPION-xisa [38]

Answer:

a )  4.5 N.s

b) V =5 m/s    

Explanation:

given,

mass of rifle(M)  = 0.9 kg

mass of bullet(m)  = 6 g = 0.006 kg

velocity of the bullet(v)  = 750 m/s

a) momentum of bullet = m × v

                                  = 750 × 0.006

                                  = 4.5 N.s

b) recoil velocity                                                      

m × u + M × U = m × v + M × V

0  + 0  = 0.006 × 750 -  0.9 × V

V = \dfrac{4.5}{0.9}

V =5 m/s                    

 

5 0
3 years ago
Juan rides his horse with a constant<br> speed of 18 km/h. How far can he travel<br> in 1/2 hour?
Brut [27]

Answer:

He traveled 9km

Explanation:

To do this problem you need to use the equation which is Speed= distance/time and this problem gives you the speed which is 18 km/h and it gives you the time 1/2 hour so you write the equation 18= d/ 1/2 which his distance is 9km

3 0
3 years ago
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