Answer:
1.71
Explanation:
the parabolic movment is described by the following equation:
where y is the height of the ball, a is the angle of launch, 
the initial velocity, g the gravity and x is the horizontal distance of the ball.
So, if we want that the ball reach the hood, we will replace values on the equation as:
Finally, solving for , we get:
1.71
Answer:
The force of universal gravitation between earth and all objects in it will be quadrupled
Explanation:
Newtons law of universal gravitation tell us the force of attraction between two bodies on the earth surface . This force is directly proportional to the product of the masses of the bodies and inversely proportional to their distance apart.
f is directly proportional to m1*m2
doubling these masses will be 2m1*2m2 = 4m1m2
if mas of earth is Me and mass of all objects is Mo
the f is proportional to Me*Mo
doubling the masses of the earth and all objects we have, 2Me*2Mo= 4MeMo
This means that doubling the masses of the earth and all objects on it will cause the force of gravitational attraction to be quadrupled.
I'm pretty sure it's the neutron star.
Answer:
v = 4.10 10⁻³ m / s
Explanation:
For this exercise we will use Newton's second law where the force is magnetic
F -W = m a
As the field is directed to the north and the proton to the east, using the rule of the right hand the force is vertical upwards, the force balances the weight the acceleration is zero
F = W
q v B = m g
Let's calculate the speed
v = m g / (q B)
v = 1,673 10⁻²⁷ 9.8 / (1.6 10⁻¹⁹ 2.5 10⁻⁵)
v = 4.10 10⁻³ m / s
That is not yet possible. that technology has not yet been invented.
