Q=l^2 times R times t
Where Q - heat, I -current, R - resistance and t is time
If you increase I twice (and it's squared), than Q gonna went up 4 times (2 squared).
Choose last
Answer:
By Factor of 4
Explanation:
The expression for centripetal acceleration is given as,
a = v²/r........... equation 1
Where a = centripetal acceleration, v = speed, r = radius of the circle.
Case 1
Given: v = 150 m/s, r = 500 m
Substitute into equation 1
a = 150²/500
a = 22500/500
a = 45 m/s².
Case 2
Given: v = 300 m/s, r = 500 m
Also substitute into equation 1
a = 300²/500
a = 180 m/s²
Factor of change of the acceleration = 180/45
Factor of change of the acceleration = 4.
Hence the acceleration will change by a factor of 4
Following are the physical properties of the given conditions:
- Copper wire is used to transfer electricity. This property is called Electrical Conductivity. It is defined as the property of material to conduct electricity. Copper is considered as the best conductive material.
- There are 19.3 grams of gold in one cubic centimeter. This statement describes the Density of gold. (Density= mass/volume) Density of material represent mass of material per unit of its volume.
- Iron turns to liquids at 1,534.85°C. That is the given temperature is Melting Point of iron. Melting point is the temperature where a solid starts turning into liquid.
- Silver is very easy to bend. This is called Flexibility of material. Flexibility is the ability of material to deform.
- Fluorite is a green crystal. This shows the color and structure of Fluorite. Green shows the color of material. Whereas crystal is the type of structure the material possess.
Answer:
Explanation:
Impulse results in a change of momentum
FΔt = mΔV
F = mΔV/Δt
The impulse acting on the hammer will equal the impulse acting on the nail
If we assume upward is the positive direction
F = m(vf - vi)/t
F = 1.2(1.0 - (-1.5)) / 0.001
F = 3000 N
1 km = 1000 m
1 min = 60 s
Entonces
60 km/min * (1000 m/km) * (1/60 min/s) = 1000 m/s