Permanent... static means staying the same. (It remains this meaning in English, science, an math)
No spacecraft has been built yet that was able to absorb harmful
radiations in space, change weather conditions on Earth, or destroy
meteors and comets which might strike Earth.
We should continue to send robotic spacecrafts into space
because they help discard some myths about objects in space.
In other words, they help us learn things that we never knew before.
Answer:
5.69 m/s.
Explanation:
The given data is as follows.
Magnetic field strength (B) = 0.65 T
Speed (v) = 4.2 m/s
Induced emf (E) = ?
Formula for emf induced at the ends of the rod of length L which is moving with a speed of v is as follows.
E = BvL
Putting the given values into the formula as follows.
.
When magnetic field is changed to
Now, we assume that the speed be to get the emf
Then,
we can conclude that the speed v of the rod be adjusted to reestablish the emf induced between the ends of the rod at its initial value is 5.69 m/s.
Explanation:
Mass = 40 g
edge of cube = 1.74 cm
volume of cube = s^3 = 1.74^3 = 1.74 * 1.74 * 1.74 = 5.268024cm cube
density = Mass/volume
= 40/5.268024
= 7.6 g/cm