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3 years ago

Vertical columns on the periodic table are called

Physics

1 answer:

Ymorist [56]3 years ago

5 0

Alkali metals alkaline earth metals and halogens and noble gases. I’m pretty sure

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The potential energy of an apple is 6.00 joules. The apple is 3.00-meters high. What is the mass of the apple?

BaLLatris [955]

   Potential energy = (mass) x (gravity) x (height)

Divide each side by (G x H) : Mass = PE / (G x H)

PE = 6 joules
Gravity = 9.8 m/s
Height = 3 m
   Mass = 6 / (9.8 x 3) =

   6 / (29.4) = <em>0.204 kg</em>

(weighs about 2 newtons or 7.2 ounces on Earth)

8 0

3 years ago

A 1.20 m wire has a mass of 6.80 g and is under a tension of 120 N. The wire is held rigidly at both ends and set into oscillati

swat32

Answer:

145.52137 m/s

1.4 m

0.7 m

60.6339 Hz

121.2678 Hz

Explanation:

T = Tension = 120 N

$\mu$ = Linear density = $\frac{m}{L}$

m = Mass of wire = 6.8 g

L = Length of wire = 1.2 m

n = Number of loops

Velocity is given by

$v=\sqrt{\frac{T}{\mu}}\\\Rightarrow v=\sqrt{\frac{T}{\frac{m}{L}}}\\\Rightarrow v=\sqrt{\frac{120}{\frac{6.8\times 10^{-3}}{1.2}}}\\\Rightarrow v=145.52137\ m/s$

The speed of waves on the wire is 145.52137 m/s

Wavelength is given by

$\lambda=\frac{2L}{n}\\\Rightarrow \lambda=\frac{2\times 1.2}{1}\\\Rightarrow \lambda=1.4\ m$

The wavelength of the waves that produces one-loop standing waves is 1.4 m

$\lambda=\frac{2L}{n}\\\Rightarrow \lambda=\frac{2\times 1.2}{2}\\\Rightarrow \lambda=0.7\ m$

The wavelength of the waves that produces two-loop standing waves is 0.7 m

Frequency is given by

$f=\frac{nv}{2L}\\\Rightarrow f=\frac{1\times 145.52137}{2\times 1.2}\\\Rightarrow f=60.6339\ Hz$

The frequency of the waves that produces one-loop standing waves is 60.6339 Hz

$f=\frac{nv}{2L}\\\Rightarrow f=\frac{2\times 145.52137}{2\times 1.2}\\\Rightarrow f=121.2678\ Hz$

The frequency of the waves that produces two-loop standing waves is 121.2678 Hz

4 0

3 years ago

A trip is taken that passes through the following points in order

MaRussiya [10]

Answer:

40.0 m

...............

3 0

3 years ago

A train travels 1000 m south for 100 s. What is the

Alexandra [31]

C. 10 m/s
You divide 1000 m by 100 s.
1000/100 to find the velocity

5 0

3 years ago

This is a machine that converts electrical energy into mechanical energy.

Yuri [45]

<h2>Answer:</h2>

Motor

<h2>Explanation:</h2>

A motor is a machine that converts electrical energy into mechanical energy. In motors, electric energy is converted into mechanic energy when a magnetic torque acts on a conductor that carries a current. There are different types of motors like DC and AC motors. The moving part of a motor is called the rotor while the stationary part is called stator

8 0

3 years ago