If you know that the radius of the Earth is 6.38 X10 m and the value of the constant G is equal to 10-11 6.67 X Nm / kg and the acceleration of gravity m / s2 9.8 then calculate the mass of the Earth?

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

What are the necessary conditions for fusion?

Which describes increasing the efficiency of energy resource