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adell [148]
3 years ago
10

Which impact would be more forceful, decreasing speed from 60mph to 0 mph over 2 seconds or 0.5 seconds? Explain

Physics
1 answer:
Firdavs [7]3 years ago
6 0
0.5 because it is quicker than 2 seconds. Because of that, the force would be more forceful and sudden.
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An iron wire has length 8.0m and a diameter 0.50mm. The sir has a resistance R.
Rudik [331]
The re<span>sistance of the second wire is 16 R.
where R is the resistance of the first wire.

R = </span>ρ\frac{l}{A}
where l = length of the wire
A = area of the wire
A = \pi r^{2} where, r = \frac{diameter of wire}{2}

Thus, on finding the ratio of resistance of the two wires, we get,

\frac{R1}{R2} =  \frac{l1A2}{l2A1}

here, R1 = R
l1 = 8m
l2 = 2m
A1=π0.25^{2}
A1=π0.50^{2}

we get. R2 = 16R
7 0
4 years ago
A circut contains a 2 microfarads and a 20 microfarads capacitor connected in parallel. What is the total capacitance of the cir
garik1379 [7]
The answer to this question would be:C. 22mf

In this question, there are two capacitors that connected in parallel. The formula to count the capacitor is the opposite of the formula used for the resistor. If constructed in series, the capacitor will have reduced capacitance. For parallel condition the equation would be:

Ctotal= C1+C2
C total= 2 mf+ 20mf= 22mf
5 0
4 years ago
An electromagnet cannot be shut off once it is started. <br> True <br> or<br> False
Tresset [83]
False the electro magnet is controlled electrically so its like turning on/off a switch thing of the magnets they have at junkyards.
6 0
4 years ago
Read 2 more answers
A boat moves through the water with two forces acting on it. One is a 2000 N forward push by the water on the propeller, and the
jekas [21]

Answer:

a). a=0.2 \frac{m}{s^{2} }

b). x=10m

c). v=2\frac{m}{s}

Explanation:

Force forward push = 2000N

Resistive force due water=1800N

Net force=2000N-1800N

Fn=200N

m=1000kg

t=10sec

a).

F_{n} =m*a\\a=\frac{F_{n}}{m}\\ a=\frac{200N}{1000kg}\\ a=0.2 \frac{m}{s^{2} }

b).

x_{f}=x_{o}+ v_{o}*t+\frac{1}{2}*a*t^{2}\\x_{o}=0\\v_{o}=0\\x_{f}=\frac{1}{2}*a*t^{2}\\x_{f}=\frac{1}{2}*0.2*(10)^{2}  \\x_{f}=10m

c).

v_{f}=v_{o}+a*t\\v_{o}=0\\v_{f}=a*t\\v_{f}=0.2\frac{m}{s^{2} }*10s\\v_{f}=2\frac{m}{s}

3 0
3 years ago
What are the units for volume and/or mass? Please answer and explain clearly thanks!
Paul [167]
The units for mass are grams (g) and kilograms (kg)
the units for volume are millilitres (ml) and litres (l)
6 0
3 years ago
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