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Goryan [66]
3 years ago
15

a 2000-kilogram car uses a breaking force of 12000 newton’s to stop in 5 seconds. what impulse acts on the car?

Physics
1 answer:
liraira [26]3 years ago
5 0

i honestly don't even know but yahoo answers says :

Impulse causes momentum to change, which means:  

Impulse = change in momentum, or in equation form:  

F∆t = (mv)2 – (mv)1  

so p (impulse)= mass times velocity so the mass is 2,000kg and the velocity is 12,000N/5s.  

speed is basically velocity so you have to calculate how many newtons per one second, so 12,000/5s-- just divide the numerator and denominator by 5. Also, velocity and speed are measured in N/s.

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How long would it take you too run the 100m sprint if from rest you accelerate at 2m/s/s for the whole race?
fredd [130]

Answer:

10 s

Explanation:

Given:

Δx = 100 m

v₀ = 0 m/s

a = 2 m/s²

Find: t

Δx = v₀ t + ½ at²

100 m = (0 m/s) t + ½ (2 m/s²) t²

t = 10 s

4 0
3 years ago
This is junior year english
pychu [463]
D. is the correct answer.
6 0
4 years ago
Read 2 more answers
A gas-turbine power plant operating on the simple Brayton cycle has a pressure ratio of 7. Air enters the compressor at 0°C and
Ivahew [28]

Answer:

Answers of the Both parts  are in the following attachment

Explanation:

         

4 0
3 years ago
Suppose that a dominant allele (P) codes for a polka-dot tail and a recessive allele (p) codes for a solid colored tail. In addi
ra1l [238]
When you put that into a Punnett square you first use the FOIL method because this is a dihybrid case where two traits are considered. This will be the resulting Punnett square:


           PL      Pl        pL       pl

PL    PPLL   PPLl   PpLL   PpLl

Pl     PPLl    PPll     PpLl    Ppll

pL    PpLL    PpLl    ppLL   ppLl

pl     PpLl     Ppll      ppLl    ppll

Now based on the Punnett square above, you can get the ratio. Remember that the dominant trait will always be expressed when you count phenotype combinations so as long as there is a capital letter in the combination, it will always be the one expressed. 

So there are 9 polka dot, long eyelashes(PL), 3 polka dot, short eyelashes (Pl), 3 solid color, long eyelashes (pL), 1 solid short eyelashes(pl).

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8 0
3 years ago
At t = 0, a battery is connected to a series arrangement of a resistor and an inductor. At what multiple of the inductive time c
Paraphin [41]

Answer:

0.2854

Explanation:

The Energy stored in coil is given by

U=\frac{1}{2}LI^{2}

U=0.565Uo

(\frac{1}{2} )L(i^{2} )=(0.565)(\frac{1}{2} )L(io^{2} )

(i^{2} )=(0.565)(io^{2} )

(ioe^{-t/T}  )^{2}=(0.565) (io)^{2}

(io)^{2}e^{-2t/T}=(0.565)(io)^{2}

e^{-2t/T}=0.565

Apply log: both sides we get

\frac{-2t}{T}=-0.5709

\frac{t}{T}=0.2854

5 0
4 years ago
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