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madam [21]
3 years ago
6

HURRY !!!

Physics
2 answers:
nydimaria [60]3 years ago
6 0
A.
D.
G.
Hop this helps
storchak [24]3 years ago
6 0

Answer:

A.) The spheres develop opposite charges.

D.) Electrons move from sphere A to sphere B.

E.) The spheres are charged through conduction.

Explanation:

In the diagram, spheres A and B are in contact, so this method is charging by contact or conduction. The rod is negatively charged, thus it attracts the protons in A and repels it electrons. Which flow into sphere B when earthened, so that B becomes negatively charged. On separation of the spheres and then removal of the charged rod, sphere A would be positively charged. Thus spheres A and B possess opposite charges.

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I need help with these questions
Feliz [49]
7. PE=0.5×700n/m×0.9m^2
0.9^2=0.81m
0.5×700×0.81= 283.5J

8. 2000=0.5×(x)×1.5m^2
1.5^2= 0.25
0.25×0.5=0.125
2000=0.125 (x)
2000/0.125=x
x=16000 n/m

9. 4000=0.5 (375 n/m)×(x)^2
0.5×187.5 (x)
4000/187.5=21.3333333333


6 0
4 years ago
Definition of mass<br> definition of density<br> definition of physical properties
butalik [34]

Answer:

Mass of a body is define as the total quantity of matter contained in it .

Density is the mass per unit volume in any object .

A physical properties is an any property that is measurable , whose value describe a state of a physical system

6 0
3 years ago
Problem 10.64 the maximum energy a bone can absorb without breaking is surprisingly small. for a healthy human of mass 67 kg , e
kvasek [131]

Answer: h = 0.30 m

Explanation:

A person jumping from height h would possess potential energy = m g h

which will convert completely into kinetic energy as person hits the ground. Now, the maximum energy absorbed by the person can be = 200 J

m = 67 kg

g = 9.8 m/s²

⇒ m g h = 200 J

⇒ h = 200 J / (67 kg × 9.8 m/s²) = 0.30 m

Hence, a person can land safely on both legs without breaking them from a height of 0.30 m only.

8 0
3 years ago
Today's Apple Mac computers run with the same internal hardware as the Windows-based PC.
Anna [14]
<span>The statement Today's Apple Mac computers run with the same internal hardware as the Windows-based PC is true.  Mac computers are Windows-based PC because windows has a connection with apple because the idea of it came from one person.</span>
8 0
4 years ago
Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride.
Mashcka [7]

The amount of work which Sam does need to stop the boat is 784Joule  if boat mass  is 800kg and boat drift in 1.4m/sec.

We know that according to work-energy theorem, change in kinetic energy of the body from one speed to another is equivalent to amount of work done by all forces acting on the body.

So, here we can see that final speed of boat is =0m/sec since Sam need to stop it.

Initial speed of boat is 1.4m/sec.

Also, we know that kinetic energy is given by the below formula:

Kinetic energy=(1/2)mv²

where m is the mass of the body

and v is the speed of the body

Now, from work energy theorem, we get

=>W=(1/2)mv^2_2 - (1/2)mv^2_1

=>W=0-(1/2)×800×(1.4)²

=>W= - 400× 1.4 × 1.4

=>W = -400×1.96

=>W= -784Joule

Here negative sign denotes work has to done against the original motion of boat.

Hence, amount of work needs to be done by Sam is 784Joule.

To know more about work,visit here:

brainly.com/question/18094932

#SPJ4

3 0
1 year ago
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