R=u^2 sin2x / g
7.8=u^2 sin2*30 /10
u=9.5m/s
Answer:
The core: this structure of the terrestrial world is made up of sulphur, iron, silicon and it is found at the centre of the terrestrial world.
The mantle: this structure of the terrestrial world is located between the outer core and the crust and consist of mainly silicate rock.
The crust: this is the structure of the terrestrial world that makes up the outermost layer. It consist of granite and basalt.
Differentiation: this is the process by which gravity separates materials according to density, with high-density materials sinking and low-density materials rising.
Lithosphere: this is made up of the hard and rigid outer layer of the terrestrial planet and it's located between the crust and the outermost mantel.
The five terrestrial worlds includes Mercury, Venus, Earth, the Moon, and Mars. The largest which includes the Venus and Earth has the thinnest lithosphere while the smallest ( mercury and moon) have the thickest lithosphere.
Answer:
Part a)

Part b)

Explanation:
Force applied by the student on the box is 80 N at an angle of 25 degree
so here two components of the force on the box is given as




now in vertical direction we can use force balance for the box to find the normal force on it



now kinetic friction on the box opposite to applied force due to rough floor is given as


now the net force on the box in forward direction is given as


now the acceleration of the box is given as


Part b)
when box is pulled up along the inclined surface of angle 10 degree
now the two components of the force will be same along the inclined and perpendicular to inclined plane


now force balance perpendicular to inclined plane is given as


now the friction force opposite to the motion on the box is given as


now the net pulling force along the inclined plane is given as



now the box will decelerate and it is given as


Answer:
a) L = 2.10x10⁴⁰ kg*m²/s
b) τ = 1.12x10²⁴ N.m
Explanation:
a) The angular momentum (L) of the pulsar can be calculated using the following equation:

<u>Where:</u>
I: inertia momentum
ω: angular velocity
First we need to calculate ω and I. The angular velocity can be calculated as follows:

<u>Where:</u>
T: is the period = 33.5x10⁻³ s

The inertia moment of the pulsar can be calculated using the following relation:

<u>Where</u>:
m: is the mass of the pulsar = 2.8x10³⁰ kg
r: is the radius = 10.0 km

Now, the angular momentum of the pulsar is:

b) If the angular velocity decreases at a rate of 10⁻¹⁴ rad/s², the torque of the pulsar is:

<u>Where:</u>
α: is the angular acceleration = 10⁻¹⁴ rad/s²

I hope it helps you!
Answer:
2.7km
Explanation:
Two methods: Convert km/hour to km/minutes or convert 3/2 minutes to hours.
Then multiply time to get the distance of the car traveled.