why the longer the distance a force is applied from the fulcrum the greater the output force. I want to know how this works exactly and how does a larger distance affects the amount if work done by the force. does it has to do with the input force traveling longer vertically some how creating a greater output? So far I've just gotten very general information I hope you can help me to understand this more deeply thank you.

You observe a binary system and see Doppler shifts in the Hβ lines from the two stars of 0.02 nm and 0.05 nm respectively. Patient observations show that the period is 22 years. If the system is inclined by 60◦ , what are the masses of the two stars?

A lion spots a gazelle exposed on the plain. The gazelle is 35m from the bear, at a compass heading of 230 degrees. 5m from the gazelle, at a heading of 190 degrees, is the gazelle's herd. The top speed of the lion is 10m/s with a maximum acceleration of 5m/s^2 . The speed of the gazelle is 0.9m/s, and it is assumed that it is already moving at this speed. Starting from rest, will the lion be able to catch the gazelle before it reaches it's herd for safety?

*Please answer this to the best of your ability, I'm very confused about it.

Shooting down planes from the ground during WWII was difficult. A timed explosive is used because hitting a moving aircraft with a single shot from a cannon is nearly impossible; This explosive allows you to be less accurate. You are responsible for aiming and setting the timed fuses for anti aircraft battery (cannon). You fire a projectile that is aerodynamic enough that you can ignore air resistance. The projectile leaves the barrel at 840m/s. Your target is at an altitude of 3000m and a horizontal distance of 4000m.

1.Find the flight time in algebraic expression.

2. At what angle above horizontal must you aim?

3.What does the delay need to be on the fuse?

a. Briefly explain Electrostatics. Express the fundamental postulates (law)
for electrostatics in free space. Express it in both differential and
integral forms?
b. Explain two ways a magnetic field can be produced?
c. There is no existence of a magnetic charge. Explain?
d. Write the expression for the law of conservation of magnetic Flux?

Thanks chegg expert.Already rated.

6. Select a contrast mode in microscopy. In the space below, describe and illustrate it in detail (hint: phase, dark-field, bright-field) (1 page limit)

State how directions of the electric field, current, drift velocity, and current density related?

Define 10 different “The right hand rule” first define the application and explain how the right hand rule is is applied to find the direction of physical concept .

please answer clearly in details

A person drops a cylindrical steel bar (Y = 8.00 × 1010 Pa) from a height of 3.20 m (distance between the floor and the bottom of the vertically oriented bar). The bar, of length L = 0.820 m, radius R = 0.00500 m, and mass m = 1.300 kg, hits the floor and bounces up, maintaining its vertical orientation. Assuming the collision with the floor is elastic, and that no rotation occurs, what is the maximum compression of the bar?

Short pulses of microwave radiation are emitted from the Crab nebula at a distance
L from the earth. When they reach the earth, the frequency components of the pulses
are dispersed after a travel time T, such that waves of different frequencies arrive at
different times. The observed dispersion is due to the intervening interstellar plasma,
which enables us to estimate the electron density of this plasma. Assuming one knows L
by other means, obtain the expression for the electron density. Assume v p ≈ vg which is
a reasonable approximation for interstellar medium.

The potential difference across a charged capacitor is 22 V. The capacitor discharges through a fixed resistor. After a time equal to the time constant, the potential difference has reduced to V. The magnitude of V is:

An object of mass m is moving in +x direction at u velocity and collides elastically with a stationery object in the x direction having a mass M.

after the collision the object with mass m travels in +y direction and the object with mass M travels in a direction with an angle theeta to the

x axes. find the value of theeta?

A child swings on a 14 m rope. The highest point of her swing is 3 m above the ground. When the child is at the lowest point, 1 m above the ground, what is her speed?