3 years ago

1. 9mA electric current is flowing through a conducting wire. Then the number of electron

Physics

1 answer:

slava [35]3 years ago

3 0

Answer:

use the formula negative -eE/A×t

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A book, that has a mass of 0.5 grams, is pushed across a table with a force of 20 newtons. What is the acceleration of the book?

Bas_tet [7]

Answer:

$4\cdot 10^4 m/s^2$

Explanation:

The acceleration of an object is given by Newton's second law:

$a=\frac{F}{m}$

where

F is the net force applied on the object

m is the mass of the object

For the book in the problem, we have:

$m=0.5 g =5\cdot 10^{-4} kg$ is the mass

$F=20 N$ is the force applied

Substituting into the formula, we find the acceleration:

$a=\frac{20 N}{5\cdot 10^{-4} kg}=4\cdot 10^4 m/s^2$

6 0

3 years ago

A cylindrical, 0.500-m rod has a diameter of 0.02 m. The rod is stretched to a length of 0.501 m by a force of 3000 N. What is t

Salsk061 [2.6K]

Answer:

Y = 4.775 x 10⁹ Pa = 4.775 GPa

Explanation:

First, we calculate the stress on the rod:

$stress = \frac{Force}{Area} = \frac{3000\ N}{\pi r^2} \\\\stress = \frac{3000\ N}{\pi (0.01\ m)^2}\\\\stress = 9.55\ x\ 10^6\ Pa = 9.55 MPa\\$

Now, we calculate the strain:

$strain = \frac{Change\ in Length}{Original\ Length}\\\\strain = \frac{0.501\ m - 0.5\ m}{0.5\ m}\\\\strain = 0.002\\$

Now, we will calculate the Young's Modulus (Y):

$Y = \frac{stress}{strain}\\\\Y = \frac{9.55\ x\ 10^6\ Pa}{0.002} \\$

6 0

3 years ago

1. Which statement is true of culture?

dlinn [17]

I think it is either A or B. I’m mostly leaning towards B.

6 0

3 years ago

Dominic made the table below to organize his notes about mixtures. What mistake did Dominic make? The title should read “Propert

Alex17521 [72]

D.........................

8 0

3 years ago

Read 2 more answers

2. What is the mass of an object that was accelerated at a rate of 1 m/s with a force of 2 N

e-lub [12.9K]

Answer:

2 kilograms

Explanation:

F = ma

2 = 1m = 2

3 0

3 years ago