2 years ago

Plzz help me please

1 answer:

6 0

Permanent magnet. An induced magnet would be created when a piece of iron (for example) is in contact with a magnet. Temporary magnets would be something like an electromagnet. Bar magnets are permanently magnetic unless we heat them or hammer them to cause their domains to loose alignment.

You might be interested in

Can someone please help me with this !!!!

lukranit [14]

Answer:

I'm not sure but I think it's 4.5 v

3 0

2 years ago

Sarah and Kenneth are going to meet partway between their homes and each leave their home at the same time. Sarah drives at 31.0

valentina_108 [34]

Answer:

b) 105220.8 m

c) 65.38 miles

d) Kenneth's home

Explanation:

Velocity of Sarah = 31 m/s east

Velocity of Kenneth = 65 mph = 65×(1609.34/3600) m/s west

Time in seconds = 29.2×60 = 1752 s

Displacement = Velocity × time

Displacement of Sarah = 31×1752 = 54312 m

Displacement of Kenneth = 65×(1609.34/3600)×1752 = 50908.8 m

b) So, distance between their homes in meters is 54312 m + 50908.8 m = 105220.8 m

c) Converting to miles

$\frac{105220.8}{1609.34}=65.38\ miles$

Their homes are 65.38 miles apart

d) They met closer to Kenneth's house (50908.8 m)

6 0

2 years ago

A 60 kg person who was at a height 90 meters climbs down to the height of 60 meters what was the change of his gpe

DanielleElmas [232]

Answer:

ΔU = -17640 J

Explanation:

use the formula ΔU = mgΔh for the change in potential energy

m = 60 kg

g = 9.8 m/s^2

Δh = 60 - 90 = -30 m

ΔU = mgΔh

ΔU = 60 * 9.8 * -30

ΔU = -17640 J

there was a decrease of 17640 joules in potential energy

5 0

3 years ago

Read 2 more answers

A rocket has a mass of 600kg. At lift-off the rocket engine exerts an upward force of 30000N. What is the resultant force on the

larisa86 [58]

Fz = 600 x 9,81 = 5886 N
Fres = Fz + Fn = 35886 N

4 0

2 years ago

Read 2 more answers

When we look at a book in the sunlight, what must happen to the light for our eyes to see the book?

dedylja [7]

Answer:

Sometimes you can see light from the Sun passing through clouds and the sunbeams appear as straight lines. After light has been reflected off an object, such as a tree or a book, it still travels in straight lines, but in a new direction.

Explanation:

7 0

3 years ago

Plzz help me please ​

Plzz help me please