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Ivahew [28]
3 years ago
9

The sun is 27 degree above the horizon. It makes a 60 m long shadow of a tall tree.

Physics
1 answer:
mestny [16]3 years ago
5 0

Answer:

 h = 30.57 m

Explanation:

given,

angle made with horizon, θ= 27°

Length of the shadow,L = 60 m

now,

the height of the tree would be equal to

tan \theta = \dfrac{height\ of tree}{shadow\ length}

tan 27^0 = \dfrac{h}{60}

 h = 60 x tan 27°

 h = 30.57 m

hence, height of the tree is equal to 30.57 m

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ololo11 [35]

Answer:

KE=800,000

Explanation:

The formula for kinetic energy is KE=1/2mv^2 or Kinetic Energy= 0.5*mass*velocity^2

so 1000 is the mass and 40 is the velocity

KE=0.5*1000*40^2

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3 years ago
What type of general wave requires a medium for the wave to travel through
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Explanation:

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Projectile Motion—A tennis ball is thrown out a window 28 m above the ground at an initial velocity of 15.0 m/s and 20.0° below
NNADVOKAT [17]

Answer:

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Explanation:

We must first find the components in the x & y axes of the initial velocity.

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The acceleration is the gravity acceleration therefore.

g = 9.81 [m/s^2]

Now we can calculate how long it takes to fall.

y=(v_{o})_{y}*t-0.5*g*t^2\\-28 = 5.13*t-0.5*9.81*t^2\\-28=-4.905*t^2+5.13*t\\4.905*t^2-5.13*t=28\\t = 2.96[s]

With this time we can find the horizontal distance that runs the projectile.

x=(v_{o})_{x}*t\\x=14.09*2.96\\x=41.7[m]

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