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GuDViN [60]
3 years ago
11

5. Find acceleration of a car if

Physics
1 answer:
Kay [80]3 years ago
6 0

Answer:

5 m/s²

Explanation:

F=ma

Force(N) = Mass(kg) × Acceleration(m/s²)

Force =10,000 N

Mass= 2,000

Acceleration = a

;10,000= 2000×a

a=10,000÷2000

a=5 m/s²

Hope this will you

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Marvin uses a long copper wire with resistivity 1.68 x 10^-8 Ω⋅m and diameter 1.00 x 10^−3​​ m to create a solenoid that has a 3
Mazyrski [523]

Answer with Explanation:

We are given that

Resistivity of copper wire=\rh0=1.68\times 10^{-8}\Omega m

Diameter=d=1.00\times 10^{-3} m

Radius of copper wire=r=\frac{d}{2}=\frac{1}{2}\times 10^{-3} m

Radius of solenoid=r'=3 cm=3\times 10^{-2} m

1 m=100 cm

a.Length of wire=l=11.3 m

Area of wire=A=\pi r^2

Where \pi=3.14

A=3.14\times (\frac{1}{2}\times 10^{-3})^2

Resistance, R=\rho \frac{l}{A}

Using the formula

R=1.68\times 10^{-8}\times\frac{11.3}{3.14\times (\frac{1}{2}\times 10^{-3})^2}

R=0.24\Omega

B.Length of solenoid=2\pi r'=2\times 3.14\times 3\times 10^{-2}=0.188 m

Number of turns=n_0=\frac{l}{2\pi r'}=\frac{11.3}{0.188}

n_0=60

C.Potential difference,V=3 V

Current,I=\frac{V}{R}

I=\frac{3}{0.24}=12.5 A

D.Total length =0.1 m

Number of turns per unit length,n=\frac{60}{0.1}=600

Magnetic field along central axis inside of the solenoid,B=\mu_0 nI

B=4\pi\times 10^{-7}\times 12.5\times 600=9.42\times 10^{-3} T

4 0
3 years ago
Read 2 more answers
A uniform rod of length L is pivoted at L/4 from one end. It is pulled to one side through a very small angle and allowed to osc
ludmilkaskok [199]

Answer:

T= 4.24sec

Explanation:

We are going to use the formula below to calculate.

T=2\pi \sqrt{\frac{L}{g} }

Where T is period

           L is length of rod

       g is acceleration due to gravity =     9.8m/s^{2}

From the problem, the rod is pivoted at 1/4L which means that three quarter of the rod was used for the oscillation. lets call this L_{O}

L_{O} = 3/4 * 5.95m

        = 4.4625m

thus   T=2\pi \sqrt{\frac{L_{O} }{g} }

          T=2\pi \sqrt{\frac{4.4625 }{9.8} }

          T= 4.24sec

8 0
4 years ago
Are anxiety disorder curable
Anvisha [2.4K]

Anxiety Disorder is treatable, not curable.

7 0
3 years ago
A lamp is rated for 240v,2.5A.what is the cost of using the lamp for 3hrs if 1kWh of electricity cost #12​
marshall27 [118]

Answer:

≈ 22¢

Explanation:

240 / 1000 = 0.240 kV

0.240 kV(2.5 A)(3 hr) = 1.8 kW•hr

1.8 kW•hr($0.12/kW•hr) = $0.216

6 0
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