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marusya05 [52]
2 years ago
11

Study the distance-time graph, showing the distances that eight different things cover in 120 seconds or less. The letters below

correspond to the lines on the graph. For each object, calculate the average speed, and then match it with the closest correct answer.
A:
B:
C:
D:
E:
F:
G:
H:

Physics
1 answer:
Diano4ka-milaya [45]2 years ago
8 0

Answer:

This question appear incomplete

Explanation:

This question appear incomplete because there is no list of closest correct answer there. Although can still be well attempted.

The formula to be used here is

average speed = distance ÷ time

The unit of speed here would be meters per second (m/s). However, some of the lines do not really fall on a measurable line on the graph and can only be "best assumed".

A: distance is 1600 meters

time appear to be 4 seconds (definitely less than 5 seconds according to the graph).

speed = 1600 ÷ 4

speed = 400 m/s

B: distance is 1600 meters

time appear to be 18 seconds (definitely less than 20 seconds according to the graph)

speed = 1600 ÷ 18

speed = 88.89 m/s

C: distance is 1600 meters

time is 65 seconds

speed = 1600 ÷ 65

speed = 24.62 m/s

D:  distance is 1600 meters

time is 105 seconds

speed = 1600 ÷ 105

speed = 15.24 m/s

E: distance is 1100 meters

time is 120 seconds

speed = 1100 ÷ 120

speed = 9.17 m/s

F: distance is 500 meters

time is 120 seconds

speed = 500 ÷ 120

speed = 4.17 m/s

G: distance appear to be 250 meters

time is 120 seconds

speed = 250 ÷ 120

speed = 2.08 m/s

H: distance appear to be 50 meters

time is 120 seconds

speed = 50 ÷ 120

speed = 0.42 m/s

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To avoid breakdown of the capacitors, the maximum potential difference to which any of them can be individually charged is 125 V
aleksley [76]

Answer:

The maximum energy stored in the combination is 0.0466Joules

Explanation:

The question is incomplete. Here is the complete question.

Three capacitors C1-11.7 μF, C2 21.0 μF, and C3 = 28.8 μF are connected in series. To avoid breakdown of the capacitors, the maximum potential difference to which any of them can be individually charged is 125 V. Determine the maximum energy stored in the series combination.

Energy stored in a capacitor is expressed as E = 1/2CtV² where

Ct is the total effective capacitance

V is the supply voltage

Since the capacitors are connected in series.

1/Ct = 1/C1+1/C2+1/C3

Given C1 = 11.7 μF, C2 = 21.0 μF, and C3 = 28.8 μF

1/Ct = 1/11.7 + 1/21.0 + 1/28.8

1/Ct = 0.0855+0.0476+0.0347

1/Ct = 0.1678

Ct = 1/0.1678

Ct = 5.96μF

Ct = 5.96×10^-6F

Since V = 125V

E = 1/2(5.96×10^-6)(125)²

E = 0.0466Joules

8 0
2 years ago
A 15kg object is travelling 10m/s and hit a stationary 10kg object and stuck together. What is the final velocity of the objects
qaws [65]

Answer:

first object final velocity =2m/s

second = 12m/s

Explanation:

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7 0
2 years ago
A car is running at a velocity of 50 miles/hour and the driver accelerates the car by 10miles/hour.How far the car travels from
dezoksy [38]
Initial velocity u = 50 miles/hour
acceleration a = 10 miles/hour
Time t = 2 hours
Distance travelled S = ut + (at^2)/2
Substituting the values in the second equation of motion,
S = 50*2 + (10 * 2 *2)/2
S = 100 + 20
S = 120 miles
Therefore the distance travelled by the car in the next two hours is 120 miles
4 0
3 years ago
Read 2 more answers
A runner moves west with an initial velocity of 4 m/s. She accelerates 3 m/s2 for 30 seconds. The runner's final velocity is
Firlakuza [10]

Answer:

v = 94m/s

Explanation:

Using the first equation of motion

v = u + at

u = 4m/s , a = 3m/s² , t = 30s , v = ?

v = u + at

v = 4 + 3 × 30

v = 4 + 90

v = 94m/s

I hope this was helpful, please mark as brainliest

3 0
2 years ago
How much heat would be needed to completely evaporate 31.5 g of boiling water at a temperature of 100 "C? Express your answer in
BaLLatris [955]

Answer:

Heat needed = 71.19 J

Explanation:

Here heat required can be calculated by the formula

            H = mL

M is the mass of water and L is the latent heat of vaporization.

Mass of water, m = 31.5 g = 0.0315 kg

Latent heat of vaporization of water = 2260 kJ/kg

Substituting

            H = mL = 0.0315 x 2260 = 71.19 kJ

Heat needed = 71.19 J

7 0
3 years ago
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