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d1i1m1o1n [39]
3 years ago
13

Which statement about the image Formed by a plane mirror is correct?

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

Answer:

The image is virtual

number-4

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Terry says that if an object has no acceleration, then no forces are exerted on it. Sherry doesn't agree, but can't provide an e
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Calculate the acceleration of a bus full speed changes from 6 miles to 12 miles over a period of three seconds
Jet001 [13]

Answer:

0.90m/s²

Explanation:

Given parameters:

Initial speed  = 6miles/hr

Final speed  = 12miles/hr

Time taken = 3 seconds

Unknown:

Acceleration = ?

Solution:

Acceleration is the rate of change of velocity with time. It is mathematically given as:

         Acceleration  = \frac{Final speed - Initial speed}{Time}

We need to convert miles/hr to meters/seconds

Initial speed = 6 x \frac{miles }{hour} x \frac{1hr}{3600s}  x \frac{1609.34m}{1mile}

                      = 2.68m/s

Final speed = 12 x \frac{1609.34}{3600}  = 5.37m/s

      Acceleration  = \frac{5.37  - 2.68}{3}   = 0.90m/s²

4 0
3 years ago
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A total charge of –6.50 µC is uniformly distributed within a sphere that has a radius of 0.150 m. What is the magnitude and dire
Marrrta [24]

Answer:

A) 2.89 × 105 N/C, radially inward

Explanation:

The magnitude of the electric field generated by a charged sphere is given by the following formula:

E=k\frac{Q}{r^2}  ( 1 )

k: Coulomb's constant = 8.98*10^9 Nm^2/C^2

Q: charge of the sphere = -6.50*10^-6 C

r: distance from the center of the sphere to the point in which E is calculated

r = 0.150m + 0.300m = 0.450 m

You replace the values of Q and r in the equation (1):

E=(8.98*10^9Nm^2/C^2)\frac{6.50*10^{-6}C}{(0.450m)^2}=288246.91\frac{N}{C}\\\\E\approx2.89*10^5\frac{N}{C}

The electric field points radially inward because the charge is negative.

hence, the answer is:

A) 2.89 × 105 N/C, radially inward

7 0
4 years ago
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