Answer:
Explanation:
Amount of heat required can be found from the following relation
Q = mcΔT
m is mass of the body , c is specific heat and ΔTis rise in temperature .
Here m = 300 kg
c = 3350 J /kg k
ΔT = 30 - 25
= 5 °C
Putting the values in the expression above
Q = 300 x 3350 x 5
= 5025000 J
Rate at which energy is absorbed = 1200 J /s
Time required
= 5025000 / 1200
= 4187.5 S
= 69.8 minute
= 1 hour 9.8 mimutes.
Answer:
<em>A) 7.37 x 10^-4 N</em>
<em>B) The resultant force will be towards the -x axis</em>
Explanation:
The three masses have mass = 3500 kg
For the force of attraction between the mass at the origin and the mass -100 cm away:
distance r = 100 cm = 1 m
gravitational constant G= 6.67×10^−11 N⋅m^2/kg^2
Gravitational force of attraction
= 
where G is the gravitational constant
m is the mass of each of the masses
r is the distance apart = 1 m
substituting, we have
=
= 8.17 x 10^-4 N
For the force of attraction between the mass at the origin and the mass 320 cm away
distance r = 320 cm = 3.2 m
= 
substituting, we have
=
= 7.98 x 10^-5 N
Resultant force = (8.17 x 10^-4 N) - (7.98 x 10^-5 N) = <em>7.37 x 10^-4 N</em>
<em></em>
<em>B) The resultant force will be towards the -x axis</em>
Length of the ramp (L) = 4.0 m = Distance traveled by the effort
Height of the inclined plane (h) = 2.0 m = Distance traveled by the resistance
IMA = Ideal mechanical advantage


IMA = 2.0
Hence, the IMA of the inclined plane is 2.0
Answer:
320m/s
Explanation:
Step 1: State your values
s= NOT NEEDED
u=20m/s
v=?
a=10m/s²
t=30 seconds
Step 2: Find a suitable suvat equation:
v=u+at
Step 3:
subsitute values into equation:
?=20+(10x30)
20+300
320m/s
Answer:
the answer is 10 task forces
Explanation:
A task force is composed for
A=1
B=1
C=1
D=2
if we form 10 work groups, we must multiply by 10 each quantity of workers
A=1x10, B=1x10, C=1x10,D=2x10
A=10, B=10, C=10, D=20
This is the total number of employees in all departments