Compare the advantages and disadvantages of buying compact fluorescent bulbs rather than filament bulbs (6 marks)

suppose we have two masses m1=2000 g and m2=4000g, where m1 is moving with initial velocity v1,i=24m/s and m2 is at rest at t=0s

Veseljchak [2.6K]

Answer:

The final velocity is 8 m/s and its direction is along the positive x-axis

Explanation:

Given :

Mass, m₁ = 2000 g = 2 kg

Mass, m₂ = 4000 g = 4 kg

Initial velocity of mass m₁, v₁ = 24i m/s

Initial velocity of mass m₂, v₂ = 0

According to the problem, after collision the two masses are stick together and moving with same velocity, that is, $v_{1f}$ .

Applying conservation of momentum,

Momentum before collision = Momentum after collision

$m_{1} v_{1} +m_{2} v_{2} =(m_{1}+m_{2}) v_{1f}$

Substitute the suitable values in the above equation.

$2\times24 +4\times0 =(2+4}) v_{1f}$

$v_{1f}=8i\ m/s$

8 0

3 years ago

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530 m/s in seawater. How deep is th

Thepotemich [5.8K]

Answer:

a. x=5355m b. food

Explanation:

A wave is a disturbance wic travels through a medium, it transfers energy without the displacement of the medium itself.

the problem can be solved with this formula v

v=2x/t

v=speed of the ultrasonic wave in seawater

x=te distance between the seawater surface and the seawater bed

t=time it takes to travel to and fro te seawater bed to the surface

v= 1530 m/s, t=7 s , x=?

1530=2x/7

1530*7=2x

x=5355m

b. An example of stored h energy is food, petroleum etc.Chemical energy are Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; called exothermic.

Reactions that require an input of heat to proceed may store some of that energy as chemical energy in newly formed bonds. we eat food so that we can h enough energy to carry out our day to day task.

3 0

3 years ago

Ashley swam 20 miles in .5 hours and 40 miles in an hour is it a proportional?

DIA [1.3K]

Yes it proportional.

4 0

3 years ago

What are the energy transfers in a torch?

lapo4ka [179]

Explanation:

The battery is a store of internal energy (shown as chemical energy). The energy is transferred through the wires to the lamp, which then transfers the energy to the surroundings as light. These are the useful energy transfers - we use electric lamps to light up our rooms.

6 0

3 years ago

The potential in a region between x = 0 and x = 6.00 m is V = a + bx, where a = 10.6 V and b = -4.90 V/m. (a) Determine the pote

cestrela7 [59]

Answer:

a) 10.6V

b) E = 4.9V/m, +x direction

c) E = 4.9V/m, +x direction

Explanation:

You have the following function:

$V=a+bx$ (1)

for the potential in a region between x=0 and x=6.00 m

a = 10.6 V

b = -4.90V/m

$V=10.6V-4.90\frac{V}{m}x$

a) for x=0 you obtain for V:

$V=10.6V-4.90\frac{V}{m}(0m)=10.6V$

b) The relation between the potential difference and the electric field can be written as:

$E=-\frac{dV}{dx}=-b=-(-4.9V/m)=4.9V/m$ (2)

the direction is +x

c) The electric field is the same for any value of x between x=0 and x=6m.

Hence,

E = 4.9V/m, +x direction

6 0

4 years ago