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swat32
3 years ago
7

A 20 kg box rests on the ground. Round all answers to the hundredths, if necessary. What is the weight of the box?​

Physics
2 answers:
BabaBlast [244]3 years ago
6 0

Answer:

Weight=200

Explanation:

Given,

\sf\longmapsto \: mass = 20 \: kilograms

We know that–

\sf\longmapsto \: acceleration \:  \: because \: of \: gravity = 10m/s^2

\sf\longmapsto \: Weight= \:  is  \: F = m•g

Let's start solving!

Weight = 20×10

Weight=200

cricket20 [7]3 years ago
5 0
  • Mass=m=20kg
  • Acceleration due to gravity=10m/s^2

Weight=Applied force

\\ \sf\longmapsto F=mg

\\ \sf\longmapsto F=20(10)

\\ \sf\longmapsto F=200N

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A 5.00-a current runs through a 12-gauge copper wire (diameter 2.05 mm) and through a light bulb. copper has 8.5 * 1028 free ele
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The correct answer is: 3.125*10^{19} electrons/second

Explanation:

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Electrons per second = n_e=\frac{5}{e}=\frac{5}{ 1.60\cdot 10^{-19}}=3.125*10^{19}

7 0
3 years ago
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What are the units for electric current
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3 0
3 years ago
¿cual es la velocidad de un haz de electrones que marchan sin desviarse cuando pasan a traves de un campo magnetico perpendicula
Elina [12.6K]

Answer:

La velocidad del haz de electrones es 1.78x10⁵ m/s. Este valor se obtuvo asumiendo que el campo magnético dado (3500007) estaba en tesla y que la fuerza venía dada en nN.

Explanation:

Podemos encontrar la velocidad del haz de electrones usando la Ley de Lorentz:

F = |q|vBsin(\theta)     (1)

En donde:

F: es la fuerza magnética = 100 nN

q: es el módulo de la carga del electron = 1.6x10⁻¹⁹ C

v: es la velocidad del haz de electrones =?

B: es el campo magnético = 3500007 T

θ: es el ángulo entre el vector velocidad y el campo magnético = 90°

Introduciendo los valores en la ecuación (1) y resolviendo para "v" tenemos:

v = \frac{F}{qBsin(\theta)} = \frac{100 \cdot 10^{-9} N}{1.6 \cdot 10^{-19} C*3500007 T*sin(90)} = 1.78 \cdot 10^{5} m/s            

Este valor se calculó asumiendo que el campo magnético está dado en tesla (no tiene unidades en el enunciado). De igual manera se asumió que la fuerza indicada viene dada en nN.

Entonces, la velocidad del haz de electrones es 1.78x10⁵ m/s.  

Espero que te sea de utilidad!                                        

7 0
3 years ago
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