Answer:
1) electric current - ampere
2) force - joule
3 frequency - hertz
4) density - kilogram per cubic metre
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Answer: 2.4 watts
Explanation:
Work done by horse = 910J
Time = 380 seconds
Power output of the horse = ?
Recall that power is the rate of doing work. Thus, power is workdone divided by time taken.
i.e Power = (work/time)
Power = 910J/380seconds
Power = 2.395 watts (rounded to two significant figures as 2.4 watts)
Thus, the power output of the horse is 2.4 watts
The length of the wire used is 3.162 m
<h3>Resistivity of a material</h3>
The formula for calculating the power is expressed as;
P = V²/R
Determine th resistance
R = V²/P
Determine the resistance of the heating coil by substituting
R = (110²/500)
R = 12100/500
R = 24.2ohms
Determine the length of the wire
R = ρL/A such that;
L = RA/ρ
Substitute the given parameters
diameter = 0.5 mm = 0.0005m
radius = 0.0005/2 = 0.00025 m
Determine the area
A = πr²
A = π * 0.00025²
A = 1.96*10^-7 m²
Determine the length
L = (24.2 * 1.96*10^-7 / 1.50*10^-6) =
L = 3.162 m
Hence the length of the wire used is 3.162 m
The length of the wire used is 3.162 m
Learn more on resistivity here; brainly.com/question/24858512
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Answer:
A 2 N force pulling and a 10 N force pulling left while a 12N force pulls right.
Answer:
there are two way to get mate and i gave them sepaert explation
Explanation:
55
N
Explanation:
Using Newton's second law of motion:
F
=
m
a
Force=mass
×
acceleration
F
=
25
×
2.2
F
=
55
N
So 55 Newtons are needed.
Answer link
Nam D.
Apr 6, 2018
55
N
Explanation:
We use Newton's second law of motion here, which states that,
F
=
m
a
m
is the mass of the object in kilograms
a
is the acceleration of the object in meters per second
F
=
25
kg
⋅
2.2
m/s
2
=
55
N
