The work done by a force is equal to:
![W=Fd](https://tex.z-dn.net/?f=W%3DFd)
where
W is the work
F is the force applied
d is the distance through which the force is applied.
In our problem, the force needed to lift the dog is equal to the weight of the dog:
F=24 N
and the dog is moved through a distance of
d=4.8 m
therefore, the work done by the child to lift the dog is
Answer:
a) v=991616m/s
b) t=2.19*10^-8sec
c)V=10263V
Explanation:
Given that a deuteron of mass 3.34*10^-27kg with a charge of 1.6*10-19C and travel a path of radius 6.90mm which is 0.0069m in a 3 tesla magnetic field
a)
We are to find the speed of deuteron
Recall that F= qVB
But we know F is also m*a
Hence
M*a= qVB
We're a is the centripetal acceleration directed inwards
Ie a=V^2/r
So M*V^2/r=qVB
V= qBr/M=1.6*10^-19*3*0.0069/3.34*10^-27
Velocity (V)=991616.8m/s
b)
We are to find the time for 12 revolution
Note before the path traced by the deuteron is a semi circular path
Hence T = distance/velocity.
T= πr/v
t=3.142*0.0069/991616.8
t=2.19*10^-8seconds
c). calculating for the potential difference V
Remember that the kinetic energy must equal the potential energy
So
1/2mv^2=/q/V
Hence V= 1/2mv^2/q
V=1/2*3.34*10^-27*991616^2/1.6*10^-19
V=10263.2V
Electric circuit. Hoped that helped
Heat is added to the system.
The relation between thermal energy and temperature change in mass is given by the following expression
q = m•C•ΔT
where q is the quantity of heat transferred
m is the mass
C is the heat capacity of the material
ΔT is the temperature change