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Ostrovityanka [42]
3 years ago
13

Does this graph represent constant or changing speed? How do you know? Find the average speed

Physics
1 answer:
stepan [7]3 years ago
6 0
Constant speed because the time is directly proportional to the speed (2). The average speed is 2 m/s
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What is the force acting on a 10kg object that accelerates from 5 m/s to 20 m/s in 5s?
vitfil [10]

Answer:

Option C

Explanation:

v= u + at

20 = 5 + a(5)

15= a(5)

a= 3 m/s²

Force = mass × acceleration

= 10 × 3

= 30 N

3 0
3 years ago
Two straight wires are in parallel and carry electrical currents in opposite directions with the same magnitude of LaTeX: 2.02.0
koban [17]

Answer:

2.4\times 10^{-5} N

Explanation:

We are given that

I_1=I_2=2.0 A

Distance between the wires,d=5.0 mm=5\times 10^{-3} m

1mm=10^{-3} m

Length of other wire,l=0.3 m

Length of one wire is infinite.

We have to find the magnitude of force between the two wires.

We know that magnetic force

F=\frac{2\mu_0 I_1I_2 l}{4\pi d}

Where \frac{\mu_0}{4\pi}=10^{-7}

F=\frac{2\times 10^{-7}\times 2\times 2\times 0.3}{5\times 10^{-3}}

F=2.4\times 10^{-5} N

When the wires carrying equal current in opposite direction then the force between two wires repel to each other.

3 0
3 years ago
An Alaskan rescue plane traveling 39 m/s drops a package of emergency rations from a height of 198 m to a stranded party of 3 ex
MAVERICK [17]

Answer:

y = 0m

y0 = 166m

v0y = 0 m/s

g = 9.8 m/s^2

t = ?

Solve for t:

y = y0 + v0y*t - (0.5)gt^2

0 = 166 - (0.5)(9.8)t^2

t = 5.82 s

Now, using time, we can solve for the range using the equation:

x = vx(t)

x = (40)(5.82)

x = 232.8 m

The impact horizontal component of velocity will be 40 m/s as velocity in terms of x is always constant. To find the impact vertical component of velocity, we use the equation:

v = v0y - gt

v = 0 - (9.8)(5.82)

v = -57.04 m/s

4 0
3 years ago
Read 2 more answers
How can Punnett square predict results of crossbreedind in peas
nika2105 [10]
Hey there,

Question: <span>How can Punnett square predict results of crossbreedind in peas?

Answer : </span><span>Because it shows all alleles and possible phenotypes.

Hope this helps :D

<em>~Top♥</em>
</span>
6 0
3 years ago
In a women's 100-m race, accelerating uniformly, laura takes 1.96 s and healan 3.11 s to attain their maximum speeds, which they
liubo4ka [24]
First we write the kinematic equations
 a
 v = a * t + vo
 r = (1/2) at ^ 2 + vo * t + ro
 We have then that:
 (10.4 - t) = time that they run at their maximum speed
 For Laura:
 d = (1/2) at ^ 2 + (at) (10.4 - t)
 100 m = (1/2) a (1.96) ^ 2 + [(1.96) a] (8.44)
 100 = 1.9208a + 16.5424a
 100 = 18.4632a
 a = 100 / 18.4632 = 5.42 m / s ^ 2
 For Healen:
 100 = (1/2) a (3.11) ^ 2 + [(3.11) a] (7.29)
 100 = 4.83605a + 22.6719a
 100 = 27.50795a
 a = 100 / 27.50795
 a = 3.64 m / s ^ 2
 Answer:
 the acceleration of each sprinter is
 Laura: 5.42 m / s ^ 2
 Healen 3.64 m / s ^ 2
3 0
3 years ago
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