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xenn [34]
3 years ago
12

What percentage of Earth is covered with water? 97 70 3 3.5 20 69

Physics
2 answers:
Leni [432]3 years ago
7 0

Answer:

70 percent

Explanation:

the answer is 70 percent

viktelen [127]3 years ago
4 0

Answer:

70%

Explanation:

It's about 71% so to round it, it would be about 70%

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In a vacuum, which has a greater acceleration while in free fall: a7 kg bowling ball or a 0.007 kg feather?
Klio2033 [76]

Answer:the will have the same acceleration

Explanation:according to fállelos theory they land at the same time

6 0
4 years ago
A stone is thrown horizontally at 30m/s from a tall cliff.
Jobisdone [24]

x(2) = 30(2) = 60 m

y(2) = ½(-9.8)2² = -19.6 m

x(4) = 30(4) = 120 m

y(4) = ½(-9.8)4² = -78.4 m

x(6) = 30(6) = 180 m

y(6) = ½(-9.8)6² = -176.4 m

x(8) = 30(8) = 240 m

y(8) = ½(-9.8)8² = -313.6 m

x(10) = 30(10) = 300 m

y(10) = ½(-9.8)10² = -490 m

5 0
3 years ago
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular t
Lisa [10]

Explanation:

Let us assume that piece 1 is m_{1} is facing west side. And, piece 2 is m_{2} facing south side.

Let m_{1} \text{and} m_{2} = m and m_{3} = 2m. Hence,

        2mv_{3y} = m(21)

          v_{3y} = \frac{21}{2}

                     = 10.5 m/s

2mv_{3x} = m(21)

          v_{3x} = \frac{21}{2}

                     = 10.5 m/s

  v_{3} = \sqrt{v^{2}_{3x} + v^{2}_{3y}}

              = \sqrt{(10.5)^{2} + (10.5)^{2}}

              = 14.84 m/s

or,          = 15 m/s

Hence, the speed of the third piece is 15 m/s.

Now, we will find the angle as follows.

          \theta = tan^{-1} (\frac{v_{3y}}{v_{3x}})

                      = tan^{-1}(\frac{10.5}{10.5})

                      = tan^{-1} (45^{o})

                      = 45^{o}

Therefore, the direction of the third piece (degrees north of east) is north of east.

5 0
4 years ago
A car has a speed of 2m/s and a mass of 1500 kg. what is the car's kinetic energy
larisa86 [58]
We have: K.E. = mv² / 2
Here, m = 1500 Kg
v = 2 m/s

Substitute their values in the formula, 
K.E. = 1500 ×2² / 2
K.E. = 6000 / 2
K.E. = 3000 J or 3 KJ

Finally, answer of your question would be 3000 Joule or 3 Kilojoule

Hope this helps!
4 0
3 years ago
Read 2 more answers
For a spring oscillating in simple harmonic motion, at what point will the velocity of
Crazy boy [7]

Answer:

equilibrium position.

Explanation:

In simple harmonic motion , velocity v(t) is given by,

v(t) = -ω A sin(ωt + φ)

where

ω = angular velocity of the corresponding circular motion

A = amplitude

t = time

φ = the initial angle of the corresponding circular motion when the motion begin.

v (t) get maximized when sin value is maximized , i.e. sin \alpha=1

The particle has maximum speed when it passes through the equilibrium position.

6 0
4 years ago
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