The given question is incomplete. The complete question is:
Estimate the volume of each ball. Use the formula 
where v is the volume and r is the radius. record the volume in table A of your student guide. The radius of the tennis ball is 2.1 cm and the radius of thr golf ball is 2.0 cm. What is the estimated volume of the table tennis ball in 
What is the estimated volume of the golf ball in
Answer: Volume of the tennis ball is 
and Volume of the golf ball is 
Explanation:
We have to find the Volume of tennis ball and golf ball by using the formula
Radius of the tennis ball = 2.1 cm
Radius of the golf ball =2.0 cm.
Putting the value of radius in the formula , we get:
Volume of the tennis ball = 
Volume of the golf ball = 
Volume of the tennis ball is and Volume of the golf ball is
Answer:
The gravitational potential energy of the man
= mass of the man(m) × gravitational acceleration(g) × height (h)
80 Kg × 9.8 m/s^2 × 60 m
80 × 9.8 x 60 ( kg ×m^2/s^2)
47040 Joules (ans)
Hope it helps
Answer:
3.70242 nm
Explanation:
Using Compton effect formula
Δλ = ( h / mec) ( 1 - cosθ)
where h is planck constant = 6.62607 × 10 ⁻³⁴ m²kg/s
me, mass of an electron = 9.11 × 10⁻³¹ kg
c is the speed of light = 3 × 10⁸ m/s
Δλ = 6.62607 × 10 ⁻³⁴ m²kg/s / (9.11 × 10⁻³¹ kg × 3 × 10⁸ m/s ) ( 1 - cos 90°) = 0.242 × 10 ⁻¹¹ m = 2.42 × 10⁻¹² m = 0.00242 nm
modified wavelength = 3.7 nm + 0.00242 nm = 3.70242 nm
Answer:
we must multiply the speed value by 3.6
Explanation:
To reduce a magnitude from one unit to another, it must be multiplied by the equivalence in the order necessary so that the units do not change.
To reduce speed from m / s to km / h
we write the speed and the two conversion factors
v [m / s] [1 km / 1000m] [3600 s / 1h
v 3600/1000
v 3.6
therefore we must multiply the speed value by 3.6
Answer:
On a brushed style generator, the increase in AC voltage from the slip rings is fed to the automatic voltage regulator, converted to DC voltage and fed into the rotor.
Explanation:
In an AC electrical generator, in order to maintain a fixed output, the output voltage is taken from the slip rings to the brushes (some generators don't have brushes) and converted to DC voltage (since it is an AC generator) and fed back to the rotor.
The rotor winding rotate inside a stationary magnetic field known as stater which induces electrical current in the winding. These winding are connected to slip rings which transfers the current to the outside circuit.
