Answer:
19.872 degrees
Explanation:
Mathematically;
Using Snell’s law
n1 sin A = n2 sinB
Where ;
n1 = refractive index in air = 1
n2 is refractive index in water = 1.33
A = ?
B = 45
Substituting the values in the equation;
1 sin A = 1.33 sin45
Sin A = 1.33 sin 45
A = arc sin (1.33 sin 45)
A = 70.12
Thus, the actual direction of the Sun with respect to the horizon = 90-A = 19.872 degrees
Answer: 1) Mass is a scalar quantity while weight is a vector quantity
2) Mass is measured in Gramma and kilogram while weight is measured in Newton.
Explanation:
Mass can be defined as the amount of matter that comprises an object. It is a scalar quantity, that is, it has magnitude. It is measured in kilogram with its unit in Kg. Mass is measured using an ordinary weighing scale.
Weight can be defined as the force acted upon an object due to gravity. Weight is a vector quantity, that is, it has both magnitude and direction towards the center of the earth. Weight can be measured with the use of a spring balance. Its unit is in Newton.
Initial speed of Gazelle is along x direction and its value will be
also its initial height is given as
Part a)
now from kinematics along Y direction
as we know that
Part b)
distance moved horizontally
as we know that
now we will have
so it will lend at distance of 4 m.
Part c)
final velocity in vertical direction
so net speed will be
Answer: width = 27.94 cm
Explanation:
Given a sheet of a standard-sized (8.5in x 11.0in) loose-leaf notebook paper.
From the value given, the width is 11.0 inches
To make the measurement in centimeters, we will convert inches into centimeters.
1 inche = 2.54 centimeters
That is, 11 × 2.54 centimeters = 27.94 cm.
Therefore, the width is 27.94 cm.
Speed and velocity are both measured using the same units. The SI unit of distance and displacement is the meter. The SI unit of time is the second. The SI unit of speed and velocity is the ratio of two — the meter per second.
