3 years ago

What is the displacement of this time velocity graph i need help asap

Physics

1 answer:

maw [93]3 years ago

3 0

Answer:

b is the answer

Explanation:

because i did this before

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A= v50cm-v20cm<br> __________________<br> t

andrezito [222]

Answer:

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Explanation:

did i help? NO ok.

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2 years ago

As a liquid is added to a beaker, the pressure exerted by the liquid on the bottom

abruzzese [7]

Answer: c) increases

Explanation:

Pressure increases with decreasing height

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2 years ago

Two long straight wires are parallel and 8.6 cm apart. They are to carry equal currents such that the magnetic field at a point

Neko [114]

Answer:

(a) The current should be in opposite direction

(b) The current needed is 39.8 A

Explanation:

Part (a)

Based, on right hand rule, the current should be in opposite direction

Part (b)

given;

strength of magnetic field, B = 370 µT

distance between the two parallel wires, d = 8.6 cm

$B = \frac{\mu_oI}{2\pi R}$

At the center, the magnetic field strength is twice

$B_c = 2(\frac{\mu_oI}{2\pi R}) =\frac{ \mu_oI}{\pi R}$

R = d/2 = 8.6/2 = 4.3 cm = 0.043 m

$B_c = \frac{ \mu_oI}{\pi R}\\\\I = \frac{B_c\pi R}{\mu_o} = \frac{370 *10^{-6}* \pi *0.043}{4\pi *10^{-7}}\\\\I = 39.8 \ A$

Therefore, current needed is 39.8 A

6 0

2 years ago

The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21ms. The total mass of the train is 825 g.

Rudiy27

Explanation:

Average power = change in energy / change in time

P = ΔE / Δt

P = (½ mv²) / t

P = (½ (0.825 kg) (0.620 m/s)²) / (0.021 s)

P = 7.55 Watts

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2 years ago

Which of the following is located in the temperature climate zone?

barxatty [35]

The correct answer is C. Taiga hope it helps ( :

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3 years ago