Answer:
θ = 33°
Explanation:
Here, we can use the formula for the total time of flight of a projectile to calculate the launch angle of frog:
where,
θ = launch angle = ?
T = Total time of flight = 0.6 s
g = acceleration due to gravity = 9.81 m/s²
u = launch speed = 5.4 m/s
Therefore,
<u>θ = 33°</u>
An object with volume greater than it mass. to account less density and thus it will float
Explanation:
Given that,
Let ABC is a triangle such that AB is perpendicular distance, BC is base and AC is the hypotenuse of triangle.
Let AB = 210 ft
AC = 90 + x
BC = x
To find :
The dimensions of the cornfield.
Solution :
Pythagoras theorem is used to find the value of x. It is given by :
On solving the above equation we find the value of x, x = 200 ft
So, BC = 200 ft
AC = 90 + 200 = 290 ft
So, the length, base and the hypotenuse of the triangle is 210 ft, 200 ft and 290 ft respectively.
I found that it was: Distance to stars, Brightness of stars and Composition of stars. Hope this helps!
A physical quantity is defined as mass per uint volume .what is its si unit.
A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as the combination of a numerical value and a unit. For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit. A physical quantity possesses at least two characteristics in common, one is numerical magnitude and other is the unit in which it is measured.