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galina1969 [7]
3 years ago
13

Help please I really need help in this one

Physics
1 answer:
irina [24]3 years ago
3 0
It is 6 yrs
.
away from the sun

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Simon is riding a bike at 12 km/h away from his friend Keesha.He throws a ball at 5 km/h back to Keesha, who is standing still o
Tems11 [23]

I notice that even though we're working with frames of reference
here, you never said which frame the '5 km/hr' is measured in.

In fact !  You didn't even say which frame the '12 km/hr' of his
bike is measured in.

So there are several different ways this could go.  I'll do it the way
I THINK you meant it, but that doesn't guarantee anything.

-- Simon is riding his bike at 12 km/hr relative to the sidewalk,
away from Keesha.

-- He throws a ball at Keesha, at 5 km/hr relative to his own face.

-- Keesha sees the ball approaching her at (12 - 5) = 7 km/hr
relative to the ground and to her.

5 0
3 years ago
A CD has to rotate under the readout-laser with a constant linear velocity of 1.25 m/s. If the laser is at a position 3.7 cm fro
Savatey [412]

Answer:N=322.53 rpm

Explanation:

Given

Linear velocity (v)=1.25 m/s

Position from center is 3.7 cm

we know

v=\omega \times r

1.25\times 100=\omega \times 3.7

\omega =\frac{125}{3.7}=33.78

and \frac{2\pi N}{60}=\omega

N=\frac{\omega \times 60}{2\pi }

N=\frac{33.78\times 60}{2\pi }

N=322.53 rpm

8 0
3 years ago
Number 18 plz help physics question
Anvisha [2.4K]

Answer:

Explanation:

a) R = V/I = 0.7/0.022 = 32Ω

b) R = V/I = 0.6/0.005 = 120Ω

c) No...Current change is not linear with voltage change.

8 0
2 years ago
Which change of state has the wrong energy change listed? condensation deposition melting freezing
ipn [44]
Where are the energy changes?
6 0
3 years ago
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When to objects stick together the mass of the combined object is equal to the
Natasha2012 [34]

Answer: Masses of the two objects added together

Explanation:

7 0
3 years ago
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