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Novay_Z [31]
3 years ago
5

How many days sun rises in a year​

Physics
1 answer:
Lana71 [14]3 years ago
8 0

Answer:

365

Explanation:

there are 365 days in a year

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Which of these does not separate WhiteLight into the colors of the visible spectrum?
salantis [7]

Answer:

A. rods in the retina of the human eye

Explanation:

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4 years ago
angie is moving a couch with a mass of 48 kg. she moves it in 120 seconds using 240 j of work. what is her power output
natta225 [31]
Power =(work done) / (time to do the work) = 240 J / 120 sec = 2 watts.
8 0
3 years ago
You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very hea
kupik [55]

Answer:

the 8 feet long plank has the most mechanical advantage

Explanation:

6 0
3 years ago
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
A crate is sliding down a ramp that is inclined at an angle 30.6 ° above the horizontal. The coefficient of kinetic friction bet
Vlada [557]

Answer:1.95 m/s^2

Explanation:

Given

inclination \theta =30.6^{\circ}

coefficient of kinetic friction \mu =0.36

As crate is moving Down therefore friction will oppose the motion

using FBD

mg\sin \theta -f_r=ma

f_r=\mu N

f_r=\mu mg\cos \theta

mg\sin \theta -\mu mg\cos \theta =ma

a=g\sin \theta -\mu g\cos \theta

a=g(\sin (30.6)-0.36\cdot \cos (30.6))

a=9.8\times 0.199

a=1.95 m/s^2          

6 0
3 years ago
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