Answer:
a)
4 times
b)
2 times
c)
0.5 times
d)
0.25 times
Explanation:
= Applied force by the person = F
= distance from the hinge = R
Torque is given as
(a)
= Applied force by the person = 2F
= distance from the hinge = 2R
New Torque is given as
So Torque becomes 4 times
b)
= Applied force by the person = F
= distance from the hinge = 2R
New Torque is given as
So Torque becomes 2 times
c)
= Applied force by the person = (0.5)F
= distance from the hinge = R
New Torque is given as
So Torque becomes 0.5 times
d)
= Applied force by the person = (0.5)F
= distance from the hinge = (0.5)R
New Torque is given as
So Torque becomes 0.25 times
Explanation:
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Answer:
the work converted to thermal energy is 40 J.
Explanation:
Given;
work done by the physicist,w = 100 J
height through which the book is raised, h = 0.2 m
efficiency of machine = 60% = 0.6
The useful work done by the machine is calculated as;
useful work = 0.6 x 100 = 60 J
The wasted energy = 100 J - 60 J
The wasted energy = 40 J
The wasted energy by the machine is possibly converted to thermal energy by the frictional part of the machine.
Therefore, the work converted to thermal energy is 40 J.
Answer:
The reagents correspond to substances that react with others, generating a chemical reaction.
Explanation:
Example:
H2 + 02 -> H202
Hydrogen reacts with oxygen in a synthesis reaction, forming a new compound (hydrogen peroxide) called a product.
Answer:
Explanation:
Given that,
Mass of star M(star) = 1.99×10^30kg
Gravitational constant G
G = 6.67×10^−11 N⋅m²/kg²
Diameter d = 25km
d = 25,000m
R = d/2 = 25,000/2
R = 12,500m
Weight w = 690N
Then, the person mass which is constant can be determined using
W =mg
m = W/g
m = 690/9.81
m = 70.34kg
The acceleration due to gravity on the surface of the neutron star is can be determined using
g(star) = GM(star)/R²
g(star) = 6.67×10^-11 × 1.99×10^30 / 12500²
g (star) = 8.49 × 10¹¹ m/s²
Then, the person weight on neutron star is
W = mg
Mass is constant, m = 70.34kg
W = 70.34 × 8.49 × 10¹¹
W = 5.98 × 10¹³ N
The weight of the person on neutron star is 5.98 × 10¹³ N