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love history [14]
2 years ago
7

HELP ME ASAP! This is a question to an assignment that I have for science.

Physics
1 answer:
GarryVolchara [31]2 years ago
3 0

Answer:

density describes how much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its

mass). In maths and physics density is calculated as mass defined as mass divided by volume (Density = Mass ÷ Volume).

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CHEGG 42 mT magnetic field points due west. If a proton of kinetic energy 9 x 10-12 J enters this field in an upward direction,
alexdok [17]

Answer:

The  magnitude of the Force is  F = 697 *10^{-15}N  and the direction is South  

Explanation:

From the question we are told that

         The magnetic field point due west and since East point toward the positive x -axis(i)  then this magnetic field would be mathematically represented as

                \= B = 42(-i)mT = 42*10^{-3} (-i) T

Now from the question we are told that the kinetic energy is

             KE = 9*10^{-12}J

Now this kinetic energy can be mathematically represented as

                  KE = \frac{1}{2}mv^2

Where m is the mass of proton which has a general value of

           m = 1.67*10^{-27}kg

Now making the subject of the formula

                v = \sqrt{\frac{KE}{0.5 * m} }

Substituting values we have

               v = \sqrt{\frac{9*10^{-12}}{0.5 * 1.67*10^{-27}} }

                 = 10.37*10^7m/s

Now from the question we are told that proton is moving upward which is in the positive z direction so the velocity of the proton would be in the positive

So the velocity would be

            \= v = 10.37*10^{7} \r k \ m/s

Now the magnetic Force can be mathematically represented as

          \= F = q \= v * \=  B

Where q is the charge on the proton which has a general value of  q =1.6*10^{-19}C

Now substituting the value

          \= F = 1.6*10^{-19 } * (10.37 *10^7) \r k * (42 *10^{-3})(-i)

              = 697*10^{-15} J

Now according to Fleming's left hand rule the direction of the magnetic force is south toward the negative Y - direction (-j)

So the force can be denoted as

                 \= F = 697*10^{-15}(-j) N

             

             

6 0
3 years ago
How much heat is needed to raise the temperature of 90g of water by 64oC?
wel
The heat released or absorbed by a process where temperature changes is calculated from the product of the mass of the sample, its heat capacity (4.18 J/g C for water) and the change of the temperature.

Heat = mC(T)
Heat = 90 (4.8) (64) = 27648 J or 27.65 kJ needed
8 0
4 years ago
Anything done scientifically can be relied upon to be accurate and reliable<br> A. true<br> B. false
weeeeeb [17]
False not all science experiments are done correctly
4 0
4 years ago
What is the size of the smallest vertical plane mirror in which a 5.0 ft tall kangaroo standing erect can see her full-length im
kati45 [8]

Answer:

iskidkdikdxidkzodkxkziskkkssisi

Explanation:

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3 years ago
Bill and Nageen have each built an electric motor and they are testing them by having them lift boxes. Bill's motor lifts a box
photoshop1234 [79]

Answer:

Bill's motor power: W_B = F x S / T = F x 0.35 / 2= 0.175F

Nageen's motor power: W_N = F x S / T = F x 0.35 / 1.8 = 0.194F

=> 0.194F > 0.175F => Nageen's motor applied more power to the box than Bill's motor.

5 0
3 years ago
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