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3 years ago

How is velocity and instantaneous speed alike

1 answer:

5 0

<span>velocity is defined as the rate of change of displacement irrespective of the length of the path travelled while speed is the average rate of covering distance. but in the liming case where the instantaneous velocity is given as v=dx/dt where dx is the small displacement in a small interval dt, both the speed and velocity have the same magnitude and the direction of velocity is the direction of the tangent to the corresponding displacement-time curve.</span>

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Which policy might help eliminate a disadvantage of renewable energy resources? A. modernizing coal power plants B. storing nucl

Viefleur [7K]

I believe the answer is D

3 0

4 years ago

n a local coffee shop, a customer slides her empty nitro cold brew downthe counter for a refill. The barista is distracted, and

Marta_Voda [28]

Answer:

5 m/s

Explanation:

Horizontal distance traveled, x = 2 m

vertical distance traveled, y = 4/5 m

Let the speed of cup as it leaves the counter is v and it takes time t to hit the ground.

Use second equation of motion in vertical direction

$y = ut+\frac{1}{2}at^{2}$

Here acceleration in vertical direction is 9.8 m/s^2.

So,

$\frac{4}{5} = 0+\frac{1}{2}\times9.8t^{2}$

t = 0.4 second

Now in horizontal direction the acceleration in zero.

Horizontal distance = horizontal velocity x time

x = v t

2 = v (0.4)

v = 5 m/s

Thus, the horizontal velocity of cup as it leaves the counter is 5 m/s.

4 0

3 years ago

Help!

muminat

Power P is the rate at which energy is generated or consumed and hence is measured in units that represent energy E per unit time t. This is:

P = E/t

Solving for t:

t = E/P

t = 6007 J / 500 W

t = 12.014 s

7 0

3 years ago

If the force is 4 newtons between two charged spheres separated by 3 centimeters, calculate the force between the same spheres s

il63 [147K]

Answer:

1 Newton

Explanation:

F=9*10^9*q0q1/r^2]]

F=9*10^9*(q0q1)/ r^2

r=3cm

F=4N

F=9*10^9*(q0q1)/3^2

4=9*10^9*(q0q1)/9

4=10^9 q0q1

q0q1=4/10^9

q0q1=4*10^-9

To calculate the force between the forces at a distance of 6 cm

F=9*10^9*(q0q1)/ r^2

=9*10^9*(4*10^-9)/6^2

=9*10^9*(4*10^-9)/36

=10^9*4*10^-9/4

=10^9*10^-9

=1 Newton

7 0

3 years ago

Which Of The Following Research Methods Are Widely Used By Psychologists?

goldenfox [79]

Answer: As you said D.

Explanation:

4 0

3 years ago