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vladimir1956 [14]
3 years ago
13

Find the velocity v=ds/dt at t=3​

Physics
1 answer:
IRINA_888 [86]3 years ago
7 0

Answer:

you need at least two out of the three to get any aenser

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Can you answer this math homework? Please!
kap26 [50]

\large \mathfrak{Solution : }

9. An object which is in circular motion (moving along a circle) is said to be accelerating because it changes it's direction constantly even if it is moving with a constant speed. cuz acceleration is change in either magnitude or direction of an object with respect to time.

therefore, it's still acceleration as change in direction with time.

10. Average speed of an object can be calculated by dividing the total distance covered by an object by time taken to cover that distance.

i.e

  • \boxed{speed =  \dfrac{distance}{time} }

it can be re- arranged to find the distance as :

  • \boxed{distance = speed \times time}

  • time =  \dfrac{distance}{speed}

11. speed = 20 m/s : conversion into km/h

distance covered : 4 km = 4000 m

  • time =  \dfrac{distance}{speed}

  • t =  \dfrac{4000}{20}

  • t =  200 \:  \: sec

time taken = 200 seconds

12. let's use the first equation of motion to find the acceleration :

  • v = u + at

  • 50 = 80 + 120a

  • 50 - 80 = 120a

  • a =  \dfrac{ - 30}{120}

  • a = -   \dfrac{1}{4} m/s {}^{2}

  • - 0.25 \:  \: m/s {}^{2}
3 0
3 years ago
the voltage used by most households can be modeled by a sine function. The maximum voltge is 120 volts, and there are 60 cycles
harina [27]

The required equation for the sine function can be written as; V = 120sin120πt

<h3>What is a sine function?</h3>

A sine function is a regular repeating function. We know that the voltage is represented using a sine function of the general form V= V-o sin2πft

Hence;

f = 60 cycles per second

V-o = 120 volts

So from the values that we have stated above;

V = 120sin120πt

Learn more about voltage: brainly.com/question/13521443

Download docx
6 0
2 years ago
Whoever could answer this I would make Brainliest ​
skad [1K]

Answer:

1. the rocks at the bottom of the aquarium

2.the fish and maybe the plants (if you use live plants)

3. fish interact with there no living things like how one would hide in the grass or something like that.

4. decorations (like a cave or fake house, tho the aquarium its self is a home)

5.they would die, and rot.

Explanation:

rocks are nonliving

fish are living things and so are plants

fish can hide in the plants

the fish can "live" in the decorations, but the aquarium itself is its home.

if something reaches the end of its life span it dies.

3 0
3 years ago
Explain how solar and lunar eclipse occur with the help of a labelled diagram.​
snow_lady [41]

Answer:

a solar eclipse occurs when the moon passes in front of the sun,blocking it out partially or completely. the eclipse results in parts of the earth being covered in the shadow of the moon. a lunar eclipse occurs when the moon passes directly behind earth and into its shadow.

Explanation:

8 0
2 years ago
Read 2 more answers
A 16.0 m long, thin, uniform metal rod slides north at a speed of 21.0 m/s. The length of the rod maintains an east-west orienta
Gekata [30.6K]

Answer:

14.112 mV

Explanation:

L = 16 m, v = 21 m/s, B = 42 μ T = 42 x 10^-6 T

The formula for the induced emf is given by

e = B x v x L

e = 42 x 10^-6 x 21 x 16 = 14.112 x 10^-3 V = 14.112 mV

Thus, the induce emf is 14.112 mV.

4 0
3 years ago
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