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Furkat [3]
3 years ago
11

What is the formula for instant velocity when I have time and distance?

Physics
1 answer:
Tomtit [17]3 years ago
3 0

Answer:

v(t)= (d/dt)x(t)

Explanation:

The instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of x with respect to t. Like average velocity, instantaneous velocity is a vector with dimension of length per time. The instantaneous velocity at a specific time point  t 0  is the rate of change of the position function, which is the slope of the position function  

x ( t ) at  t 0 .

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A thin spherical glass shell in air is filled with an unknown liquid. A horizontal parallel light beam is incident on the shell
sammy [17]
I have the exact same question, any chance you figured it out since you posted this?
8 0
3 years ago
A:10i - 2j -4k and B: i +7j - k. Determine |A-B| ​
maksim [4K]

<em>A</em> - <em>B</em> = (10<em>i</em> - 2<em>j</em> - 4<em>k</em>) - (<em>i</em> + 7<em>j</em> - <em>k</em>)

<em>A</em> - <em>B</em> = 9<em>i</em> - 9<em>j</em> - 3<em>k</em>

|<em>A</em> - <em>B</em>| = √(9² + (-9)² + (-3)²) = √189 = 3√19

8 0
3 years ago
If you change the distance between two charged objects, A and B, which of
mars1129 [50]

The factors which are affected will be  based on the distance or range between the charged objects A and  B

<u>Explanation:</u>

<u>Definition:</u>

  • The force, F among the two-point size charges A and B are divided by a range  r is given by Coulomb formula.

F=9x10^9 AB/r²

<u>Factors:</u>

  • If the range among them is doubled the force will be decreased to 1/4 of the initial value. And if the range is split, the force will be four times.
  • If the range among them is tripled, the force will be decreased to 1/9 of the initial value. If the range is decreased to one-third of the new value, the force will rise to Nine times the initial value.

4 0
3 years ago
Read 2 more answers
A woman sits on a spinning piano stool with her arms extended. When she folds her arms, which of the following occurs? Question
iogann1982 [59]

Answer:

The correct option is that (She decreases her moment of inertia, thereby increasing her angular speed.)

Explanation:

When an object is in circular motion, the vector that describes it is known as angular momentum. Angular momentum is conserved or constant when an object is spinning in a closed system and no external torques are applied to it. An example of conservation of angular momentum is seen when a woman is sitting on a spinning piano stool with her arms extended. Her angular momentum is conserved because the net torque on her is negligibly small as the friction is exerted very close to the pivot point.

When she folds her arms,her rate of spin increases greatly decreasing her moment of inertia. The work she does to pull in her arms results in an increase in rotational kinetic energy( that is, increase in her angular speed). I hope this helps, thanks!

5 0
3 years ago
Two parallel conductors are carrying currents in the same direction. The currents are non-zero and not necessarily equal. The ma
Anton [14]

Answer:

The magnitude of magnetic field decreases in comparison to previous case.

Explanation:

Let current flowing  in two conductors  are I_1 and I_2

Magnetic field in wire,B=\frac{\mu_0 I}{2\pi r}

Magnetic field due to current I1

B_1=\frac{\mu_0 I_1}{2\pi r}

Magnetic field due to current I2

B_2=\frac{\mu_0 I}{2\pi r}

When two parallel conductors are carrying currents in the same direction  then the magnetic field will be added.

B=B_1+B_2=40\mu T

When the  direction of one of the current is reversed  then  the magnitude of the  magnetic field midway between them

B=B_1-B_2=\frac{\mu_0I_1}{2\pi r}-\frac{\mu_0 I_2}{2\pi r}

B=\frac{\mu_0(I_1-I_2)}{2\pi r}

Hence, the magnitude of magnetic field decreases in comparison to previous case.

3 0
4 years ago
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