Answer:
The average force exerted on the man by the ground therefore is 153.319.53 N
Explanation:
Given the following information
Mass of man, m = 75 kg
height of fall, h = 0.48 cm
velocity just before landing, v = 4.43 m/s
We therefore have
The work required to break the fall is equal to the kinetic energy of motion, just before touching the ground
Work done = Energy to absorb Kinetic Energy KE = 0.5·m·v²= F·h
Where:
F = Force required to break the fall
Therefore the force, F = (0.5·m·v² )/h
= 0.5×75 kg ×(4.43 m/s)²/(0.0048 m) = 153319.53 N
The average force exerted on him by the ground is therefore
= 153319.53 N.
Answer:
The acceleration of the electron is 1.457 x 10¹⁵ m/s².
Explanation:
Given;
initial velocity of the emitted electron, u = 1.5 x 10⁵ m/s
distance traveled by the electron, d = 0.01 m
final velocity of the electron, v = 5.4 x 10⁶ m/s
The acceleration of the electron is calculated as;
v² = u² + 2ad
(5.4 x 10⁶)² = (1.5 x 10⁵)² + (2 x 0.01)a
(2 x 0.01)a = (5.4 x 10⁶)² - (1.5 x 10⁵)²
(2 x 0.01)a = 2.91375 x 10¹³
Therefore, the acceleration of the electron is 1.457 x 10¹⁵ m/s².
Wavelength = (speed) / (frequency)
Speed of radio in air = approximately 3 x 10⁸ m/s
Cell phone: Frequency = 1.9 GHz = 1.9 x 10⁹ Hz
Wavelength = (3 x 10⁸ m/s) / (1.9 x 10⁹ /sec) = 15.79 cm (6.2 inches)
WHAM: Frequency = 1180 KHz = 1.18 x 10⁶ Hz
Wavelength = (3 x 10⁸ m/s) / (1.18 x 10⁶ /sec) = 254.2 meters (0.16 mile)
I KNOW there must be somebody around here from Rochester NY.
My roomie and I used to wake up to WHAM when we were in college there.
<span>insulators are stored in the bonds to hold them together</span>
