Answer:
Precipitation is the formation of a solid from a solution. It is necessary to centrifuge the precipitate to exert sufficient forces of gravity to bring the solid particles in the solution to come together and settle
Explanation:
When you centrifuge precipitate it enables the nucleation to form.
Centrifuging the precipitate helps in determining whether a certain element is present in a solution or not.
Answer:
The height will be 917431.2 m.
Explanation:
Power of bulb = 75 W
Time kept on 1 hr = 60 x 60 = 3600 sec
Energy of bulb = power x time
E = 75 x 3600 = 270000 J
From conservation of energy, kinetic energy of the bulb is equal to the potential energy of the bulb due to its height of fall.
Potential energy = m x g x h
Where g = acceleration due to gravity 9.81 m/s2
m = mass = 30 g = 0.03 kg
PE = 0.03 x 9.81 x h = 0.2943h
Equating withe the energy of bulb (still obeying energy conservation)
270000 = 0.2943h
h = 270000/0.2943 = 917431.2 m
Answer:
5.09 x 10⁵ Nm²/C
Explanation:
The electric flux φ through a planar area is defined as the electric field Ε times the component of the area Α perpendicular to the field. i.e
φ = E A
From the question;
E = (8.0j + 2.0k) ✕ 10³ N/C
r = radius of the circular area = 9.0m
A = area of a circle = π r² [Take π = 3.142]
A = 3.142 x 9² = 254.502m²
Now, since the area lies in the x-y plane, only the z-component of the electric field is responsible for the electric flux through the circular area.
Therefore;
φ = (2.0) x 10³ x 254.502
φ = 5.09 x 10⁵ Nm²/C
The electric flux is 5.09 x 10⁵ Nm²/C
Answer:
car is a complex compound machine, that is fueled by gasoline to create motion. In a car, the engine is responsible for producing the power that causes the wheels to turn. The engine turns a rod called a crankshaft which is connected to the drive shaft which in turn is connected to the axle which of course is connected to the wheels.
Gasoline is pumped into the gas tank of the car. From the gas tank, the fuel travels through the fuel line and reaches either the carburetor or fuel injector. From this point the gas flow is controlled by the amount of pressure placed on the accelerator. The fuel is converted into a mist much like a perfume by the carburetor. This "perfume" is then released into the cylinders where it is compressed, ignited, and exploded. Each time an explosion takes place the pistons are forced down, causing the crankshaft to turn. With each turn of the crankshaft comes a turn of the driveshaft and with each turn of the driveshaft, comes a turn of the axle and consequently the wheels.
A car is a complicated and complex machine that is dependent upon the laws of physics for both efficiency and performance. Nearly all the laws of physics can be found in the workings of an automobile. Friction between the rubber tires and asphalt ground is the reason why the car moves (aside from all the workings of the engine). To better improve friction, tires are built and designed with tread patterns that grip the asphalt road more efficiently.
Aerodynamics is also a great factor when it comes to designing cars. Air resistance can contribute greatly to low gas mileage and poor efficiency. As a result, car manufacturers design automobiles with pointed fronts, rounded bodies, and streamlined patterns. With these designs the air can be "cut" so that it does not act like a block stopping the car. A good way to test the notion of air resistance is to put a hand out of a car when going down the freeway. A vertical hand pointing straight up will encounter great air resistance while a horizontal hand will encounter hardly any. This is the reason why cars are pointed in the front and not flat.
Work done by the engine is transferred to different parts of the car through gears and levers until this work reaches the axle. Once the work has reached the axle the tires can be turned and the car can move. For this work to be created, however, requires the presence of such items as carburetors, pistons, crankshafts, spark plugs, gasoline, and many other components. A car is about the best example of all the forces of physics coming together for one purpose, motion.
Explanation:
so it needs fuel
Answer:
Explanation:
The person on the side of the road will see the ball fall straight down, Once the person riding on the pickup truck throw the ball backward with the same speed as the truck relative to the ground,
The ball is seen moving backward by the person on the truck
