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Fofino [41]
3 years ago
12

two negative charge of -2.0 c and a positive charge of 3.0 c are separated by 80 m what is the force between two charges

Physics
1 answer:
kozerog [31]3 years ago
6 0
The Coulomb force is equal to the constant k times the product of charge one and charge two over radius.

F=k((q1q2)/r)
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What is the frequency of a sound wave having a velocity of 341 meters/second and a wavelength of 0.8 meters?
ololo11 [35]
Velocity=frequency/wavelength
frequency=velocity*<span>wavelength
</span>f=341*0.8
f=272.8 Hz
7 0
3 years ago
1. You have a cat who has a mass of 10 kg and is
disa [49]

Answer:

1) F = 100N

2) a = 2 m/s²

3) m = 25 kg

Explanation:

1) F = ma ( F = ?, m = 10 kg, a = 10 m/s² )

  F = 10×10

  F = 100 N

2) F = ma ( F = 20N, m = 10 kg, a = ? )

   20 = 10×a

   10a = 20

   a = 20/10

   a = 2 m/s²

3)F = ma ( F = 100N, m = ?, a = 4 m/s² )

  100 = m×4

  4m = 100

  m = 100/4

  m = 25 kg

Hope that helps! Good luck!

 

7 0
3 years ago
.. Which location shows AUTUMN (fall) in the NORTHERN hemisphere? *
Lena [83]

Answer:

Location 2

Explanation:

This shows fall because the Earth is a little tilted not giving as much light

8 0
3 years ago
Read 2 more answers
The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. At this unit price, calculate
strojnjashka [21]

Answer: a) $1.6123 , b) $0.00588 c) $0.392

Explanation:

Note, all power in watts is converted to kilowatts and all units of time is converted to hours.

The cost of electricity is $0.12 for 1kwh.

Question a.

Power = 40w to kilowatts = 40/1000 = 0.04kw

Time = 2 weeks to hours = 24 * 14 = 336 h.

Energy = power * time.

Energy = 0.04 * 336 = 13.44kwh.

If 1kwh cost $0.12, then 13.44 kwh will cost

0.12 * 13.44 = $1.6132.

Question b

Power = 980w to kilowatts = 980/1000= 0.98kw

Time = 3 minutes to hours = 3/60 = 0.05 h

Energy = power * time

Energy = 0.98 * 0.05

Energy = 0.049kwh

If 1kwh cost $0.12, then 0.049 kwh will cost

0.049 * 0.12 = $0.00588

Question c

Power = 4900w to kilowatts = 4900/1000= 4.9kw.

Time = 40 minutes to hours = 40/ 60 = 0.67.

Energy = power * time

Energy = 4.9 * 0.67

Energy = 3.267 kwh

If 1 kwh cost $0.12, then 3.267kwh will cost

3.268 * 0.12 = $ 0.392

4 0
3 years ago
What is the time traveled by a pulse over a distance of lcm in air (n=1) and in 1cm of glass (n 1.5)? What is the difference in
Salsk061 [2.6K]

Answer: in air 33.33 ps and in the glass 50 ps: so the difference 16.67 ps

Explanation: In order to calculate the time for a pulse travellin in air  and in a glass we have to consider the expresion of the speed given by:

v= d/t  v the speed in a medium is given by c/n where c and n are the speed of light and refractive index respectively.

so the time is:

t=d/v=d*n/c

in air

t=0.01 m*1/3*10^8 m/s= 33.33 ps

while for the glass

t=0.01 m*1.5* 3* 10^8 m/s= 50 ps

Finally the difference is (50-33.33)ps = 16.67 ps

8 0
3 years ago
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