1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AlexFokin [52]
3 years ago
9

The electric field everywhere on the surface of a thin, spherical shell of radius 0.800 m is of magnitude 902 N/C and points rad

ially toward the center of the sphere.
(a) What is the net charge within the sphere's surface?

Physics
1 answer:
Lilit [14]3 years ago
8 0

Explanation:

(a) From E=

r

2

k

e

​

Q

​

Q=

k

e

​

Er

2

​

=

(8.99×10

9

N⋅m

2

/C

2

)

(8.90×10

2

N/C)(0.750m)

2

​

=5.57×10

−8

C

But Q is negative since  

E

→

 points inward, so

Q=−5.57×10

−8

C=−55.7nC

(b) The negatve charge has a spherically symmetric charge distribution, concentric with the spherical shell

You might be interested in
Positions B and D are 11.3 meters and 1.9 meters above the playing field, respectively. If the ball had a speed of 6.2 m/s in po
Andreyy89

Answer:

Speed of the ball in position D =14.92 \frac{m}{s}

<u>Explanation:</u>

Given:

Position of B=11.3\text { meters }

Position of D=1.9\text { meters }

Velocity of B=6.2\text { meters }

To Find:

Velocity of D

Solution:

According to the formula, Velocity is given as

V d=\sqrt{\left[V b^{2}+(2 \times g \times d y)\right]}

V b=Velocity of B

V d=Velocity of D

g=acceleration due to gravity=9.8 m/s^2  

d y=Change in position of B and D

Substitute the all values in the above equation we get  

d y=11.3-1.9

V d=\sqrt{\left[6.2^{2}+(2 \times 9.8 \times(11.3-1.9))\right]}

=\sqrt{[38.44+(2 \times 9.8 \times(9.4))]}

=\sqrt{[38.44+(19.6 \times 9.4)]}

=\sqrt{38.44+186.24}

=\sqrt{222.68}

=14.92 \frac{m}{s}

Result :

The velocity of D is =14.92 \frac{m}{s}

5 0
3 years ago
A circuit contains two devices that are connected in parallel. If the resistance of one of these devices is 12 ohms and the resi
finlep [7]

<u>Answer</u>

3 Ohms

<u>Explanation</u>

when the resistors are in series, the resistance in the circuit increases. For example, if two resistors, R1 and R2 are in series, the combined resistance is R1+R2.

When connected in parallel, the total resistance is the reciprocal of (1/R1 + 1/R2)

In this case the resistors are in parallel.

Total resistance = (1/12 + 1/4)⁻¹

= (1/3)⁻¹

= 3 Ohms

7 0
3 years ago
Read 2 more answers
"Energy is never created of destroyed, it only transforms from one form to another" is the definition of… A. The Law of Diminish
Serga [27]

Answer:

B. The Law of Conservation of Energy

Explanation:

In Science, energy can be defined as the ability of an object or body to do work. There are two (2) main types of energy and these are;

I. Kinetic energy: it can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

Where, K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

II. Potential energy: it can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

Where, P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Additionally, the various forms of energy are solar energy, electrical energy, chemical energy, thermal energy, wind energy, nuclear energy etc.

Hence, energy is never created of destroyed, it only transforms from one form to another" is the definition of The Law of Conservation of Energy.

8 0
3 years ago
Jessica stretches her arms out to 0.6m from the center of her body while holding a 2 kg mass in each hand She then spins around
AnnyKZ [126]

Answer:

4.4 m/s

Explanation:

Angular momentum is:

L = Iω

For a point mass, this can also be written as:

L = mvr

Angular momentum is conserved, so:

L₁ = L₂

m₁ v₁ r₁ = m₂ v₂ r₂

(2 kg) (1.1 m/s) (0.6 m) = (2 kg) v (0.15 m)

v = 4.4 m/s

7 0
4 years ago
How does the pingpong ball's velocity before it collided with the can compare to its velocity after it collided with the can?
Arturiano [62]

The velocity  of before collision and after collision is equal and opposite.

<h3 /><h3>What is collision?</h3>

In physics, collision, which is also known as impact, is the abrupt, powerful coming together in close proximity of two bodies, such as two pool cues, a golf club and a ball, a hammer and a nail, two train carriages when linked, or a falling item and a floor.

If the collision is perfectly elastic , the momentum is conserved before and after collision . Therefore the velocity  of before collision and after collision is equal and opposite.

to learn more about collision go to -

brainly.com/question/7694106

#SPJ4

7 0
2 years ago
Other questions:
  • A hydraulic press must be used to press-fit two components together in an assembly process. the system must generate at least 77
    13·1 answer
  • What are the requirements for chemical labels
    8·1 answer
  • At approximately what time of day does the Waning Gibbous moon set?
    7·2 answers
  • What might be a reason conflict arises?
    11·2 answers
  • A small fish (m = 0.5 kg) moving at 2 m/s is followed by a bigger fish (m = 5 kg) moving at 3 m/s. (Show work)
    9·1 answer
  • Which statement is true about the formation of bonds?
    5·1 answer
  • A pendulum clock depends on the period of a pendulum to keep correct time. Suppose a pendulum clock is keeping correct time and
    5·1 answer
  • a 110 volt wall outlet supplies power to a stereo with a resistance of 10 ohms. how much current is flowing through the stereo?​
    9·1 answer
  • I only need the answers for 7 and 8! No need to write a sentence on what it’s about. ( sorry if the picture is small) thank you
    5·1 answer
  • What does democratized knowledge mean?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!