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bearhunter [10]
3 years ago
13

What are the components of a vector with a magnitude of 4.00 and a direction of -112°?

Physics
1 answer:
zzz [600]3 years ago
4 0

Answer: (-1.50 -3.71)

Explanation:

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The Earth's magnetic field is approximately 0.5 Gauss. What is the magnetic energy density of this field
ser-zykov [4K]

Answer:

The  magnetic energy density  is  E_B  =  9.95 *10^{-4} \  J/m^3

Explanation:

From the question we are told that  

    The  earths magnetic field is  B  =  0.5 \  Gauss

Now

          1 \ Gauss  \to  1 *10^{-4} \ T

=>        0.5  \ Gauss  \to  x T

So  

          x =  \frac{0.5 *  1*10^{-4}}{1}

          x = B= 5.0 *10^{-5} \  T

Generally the magnetic energy density is  mathematically represented as

        E_B  =  \frac{B^2}{ 2 *  \mu_o  }

  Here \mu_o is the  permeability of  free space with a constant value

          \mu_o  =  4\pi * 10^{-7} N/A^2

substituting values for equation above  

       E_B  =  \frac{(5*10^{-5})^2}{ 2 *   4\pi * 10^{-7}  }

       E_B  =  9.95 *10^{-4} \  J/m^3

5 0
3 years ago
A science class did an investigation to see how many breaths it took for each student to blow up a balloon. Jason blew up his ba
sineoko [7]

Since Jason plays a lot of sports <em>(D)</em>, there's a good chance that he has developed a greater-than-average lung capacity.  This is a good thing.

7 0
3 years ago
What is the density of a 2 gallon milk jug that has a mass of 2.0 kg? Answer should be in g/ml.
kirill [66]

volume of milk is given as

V = 2 Gallon

we will convert it into mL unit

V = 2 Gal = 7570.82 ml

mass of the milk m = 2kg

m = 2000 g

now for the density we can use

\rho = \frac{m}{V}

\rho = \frac{2000}{7570.82}

\rho = 0.264 g/mL

<em>so the density is 0.264 g/mL for above sample</em>

8 0
4 years ago
As temperature of this substance rises from 20°C to 50°C, the substance _______ heat and its kinetic energy _________ .
stellarik [79]

Answer:

absorbs heat and its kinetic energy increases.

Explanation:

As we know that heat is defined as the change in the temperature as there is increase in the temperature change then the heat will increase or decrease with respect to increase or decrease in temperature change.

In the given, question temperature is changing from 20° to 50° which means there is increase in the temperature which results in the absorption of heat. And increase temperature will increase the average speed of the molecules which results in increase in kinetic energy.

6 0
3 years ago
2. How do light waves differ from sound waves and water waves?
mina [271]
Sound and water waves are mechanical waves, unlike light waves.
7 0
3 years ago
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