Answer:
v = 87.57 m/s
Explanation:
Given,
The initial velocity of the car, u = 0
The final velocity of the car, v = 60 mi/hr
The time period of car, t = 8 s
= 0.00222 hr
The acceleration of the car is given by the formula,
a = (v -u) / t
= 60 / 0.00222
= 27027 mi/hr²
If the car has initial velocity, u = 50 mi/hr
The time period of the car, t = 5.0 s
= 0.00139 hr
Using first equations of motion
<em> v = u + at</em>
= 50 + (0.00139 x 27027)
= 87.57 mi/hr
Hence, the final velocity of the car, v = 87.57 mi/hr
Answer:
σ = 4.1 MPa
Explanation:
Given that
m= 2.5 kg
v= 32 km.hr
v= 8.88 m/s
The kinetic energy of the mass ,KE
KE = mv²/2
KE = 2.5 x 8.88²/2
KE= 98.56 J -------1
The strain energy of the string
![E=\dfrac{\sigma^2}{2E}AL](https://tex.z-dn.net/?f=E%3D%5Cdfrac%7B%5Csigma%5E2%7D%7B2E%7DAL)
![E=\dfrac{\sigma^2}{2\times 84,000\times 10^6}\times 6.5\times 10^{-4}\times 1500](https://tex.z-dn.net/?f=E%3D%5Cdfrac%7B%5Csigma%5E2%7D%7B2%5Ctimes%2084%2C000%5Ctimes%2010%5E6%7D%5Ctimes%206.5%5Ctimes%2010%5E%7B-4%7D%5Ctimes%201500)
----2
KE= E
![\sigma =\sqrt{\dfrac{98.56}{5.80\times 10^{-12}}}](https://tex.z-dn.net/?f=%5Csigma%20%3D%5Csqrt%7B%5Cdfrac%7B98.56%7D%7B5.80%5Ctimes%2010%5E%7B-12%7D%7D%7D)
σ = 4.1 MPa
Answer:
The movement of electrons in the presence of a magnetic field.
Explanation:
cathode-ray tube (CRT) has to do with
a vacuum tube in which an electron beam is deflected by applying electric or magnetic fields, produces a trace on a fluorescent screen. Cathode-ray tubes are uses in the television (TV) display. Other uses include radar displays, oscillography, and visual displays for computer terminals.
Answer:
Sun
Explanation:
Sun Can Give Us Light Energy And It convert Into Heat Energy