Answer:
Bulbs that heat a gas or a filament will heat up more than other light sources.
Explanation:
Incandescent bulbs are consist of thin wire known as filament which converts electric current into light. These filaments are made up of tungsten metal. The filaments gets hot due to the passage of electric currents which turns the bulb up. Bulb starts glowing and produce light then.
There are many ways to convert electricity into light that is why some bulbs heat up more than others. Some of then are very efficient (converts electricity to light mainly) while others are less efficient (converts electricity to light as well as produce plenty of heat).
For example:
- Incandescent Bulbs -they get hot
- Compact Fluorescent Light Bulbs - they get a little bit hot
- Light Emitting Diode (LED) - they don’t get hot
- Halogen Bulbs (halogen gas) - they get extremely hot
Answer:
a)this graph is also a line b) in both cases we have a uniform movement
Explanation:
In this exercise we have a uniform movement
v = d / t
d = v t
in the table we give some values to make the graph
t (s) d (m)
1 10
2 20
3 30
In the attached we can see the graph that is a straight line
we have another vehicle at v = 50 me / S
t (s) d (m)
1 50
2 100
3 150
this graph is also a line
b) in both cases we have a uniform movement
Answer:
(A) 11 m/s
(B) 1.3 m
Explanation:
Horizontal range, R = 9.6 m
Angle of projection, theta = 28 degree
(A)
Use the formula of horizontal range
R = u^2 Sin 2 theta / g
u^2 = R g / Sin 2 theta
u^2 = 9.6 × 9.8 / Sin ( 2 × 28)
u = 10.65 m/s
u = 11 m/s
(B)
Use the formula for maximum height
H = u^2 Sin ^2 theta / 2g
H =
10.65 × 10.65 × Sin^2 (28) / ( 2 × 9.8)
H = 1.275 m
H = 1 .3 m
6,000 Joules. The formula for KE is KE=1/2mv^2. 20^2= 400. 400 x 30=12,000. 12,000/2=6,000. :)
Answer:
980 dyne
Explanation:
Volume = 1 cm^3, d = 0.92 g / cm^3, D = 1 g/cm^3
In the equilibrium condition, the buoyant force is equal to the weight of the block.
Buoyant force = Volume of block x density of water x g
Buoyant force = 1 x 1 x 980 = 980 dyne