When you rub a balloon on a sweater, for example, some electrons come off and end up on the balloon. The fibers have lost electrons giving them a positive charge. The rubber gained electrons giving it a negative charge. ... The positively charged fibers are now attracted to the negatively charged balloon.
Given.
force = 16.88 N is
radius = 0.340m
an angular acceleration = 1.20rad/s^2
the formula for torque is
F*r = I*a
where I is moment of inertia
16.88*.34 = I*1.2
I = 4.78Kg-m^2
so rotational inertia I = 4.78Kg-m^2
Answer:Wrap more turns of wire around the nail.
Explanation:The power of an electromagnet is directly proportional to the amount of electricity passing through that electromagnet.
Now,if they increase the number of rounds of the copper coil,the electricity conducting surface amount will also increase.
And that's why the electricity passing through that electromagnet will increase along with the electromagnetic power of that electromagnet.
• Increasing the battery voltage :
If they increase the battery voltage,the electricity which is passing through that electromagnet will also increase in amount .
And as discussed previously,the increasing amount of electricity will also increase the electromagnetic abilities of the electromagnet.
The answer is B. Bye because B those study speed.
Answer:
37.04 %
Explanation:
Young modulus of the disk = stress / strain = F t/ AΔt
where t = thickness in meters = 0.5 cm = 0.5 / 100 = 0.005 m
Δt = the change in the thickness of the disk in meters
F = 95 × 9.8 ( mass × acceleration due to gravity) = 931 N
half of the weight of the man = 931 / 2 = 465.5
young modulus of the disk = 1.0 × 10⁶ N/m²
radius = diameter / 2 = 4 /2 = 2 cm = 2/100 = 0.02 m
Area of the disk = πr² = 3.142 × ( 0.02)²= 0.0012568 m²
1.0 × 10⁶ N/m² = ( 465.5 × 0.005) / ( 0.0012568 × Δt)
0.0012568 Δt = 465.5 × 0.005) / (1.0 × 10⁶) = 2.3275 × 10⁻⁶
Δt = 2.3275 × 10⁻⁶ / 0.0012568 = 0.001852 m
the fraction the disk was compress = 0.001852 / 0.005 × 100 = 37.04 %