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3 years ago

What are some errors made while doing measuring with a triple beam balance lab

Physics

2 answers:

nydimaria [60]3 years ago

7 0

Make sure the triple beam balance is at 0 before you begin.

Andru [333]3 years ago

4 0

Measurements are not correct , wrong measurements , Not at zero

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A track and field athlete is running forward with a javelin at a

rosijanka [135]

Explanation:

The relative velocity is the velocity of the athlete relative to the ground plus the velocity of the javelin relative to the athlete.

v = 4.2 m/s + 10.3 m/s

v = 14.5 m/s

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3 years ago

An object has a position given by the radius vector r = [2.0 m + (3.00 m/s)t](i)+ [3.0 m - (2.00 m/s^2)t^2](j). Here (i) and (j)

jenyasd209 [6]

Answer:

The speed of the object is ( $3i - 4.00tj$ )m/s

The magnitude of the acceleration is 4.00m/s²

Explanation:

Given - position vector;

r = (2.0 + 3.00t)i + (3.0 - 2.00t²)j -------------------(i)

To get the speed vector ( $v$ ), take the first derivative of equation (i) with respect to time t as follows;

$v$ = $\frac{dr}{dt}$

$v$ = $\frac{d[(2.0 + 3.00t)i + (3.0 - 2.00t^2)j] }{dt}$

$v$ = $3i - 4.00tj$ ------------------------(ii)

To get the acceleration vector ( $a$ ), take the first derivative of the speed vector in equation(ii) as follows;

$a = \frac{dv}{dt}$

$a = \frac{d(3i - 4.00tj)}{dt}$

$a = -4.00$ j

The magnitude of the acceleration |a| is therefore given by

|a| = |-4.00|

|a| = 4.00 m/s²

In conclusion;

the speed of the object is ( $3i - 4.00tj$ )m/s

the magnitude of the acceleration is 4.00m/s²

3 0

3 years ago

Examples of how thermal energy transfer by conduction, convection, or radiation.

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Microwave Radiation. Microwave radiation utilizes short, high-frequency waves that penetrate food, which agitates its water molecules to create friction and transfer heat. If you're heating a solid substance, this heat energy is transferred throughout the food through conduction, while liquids do so through convection.

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3 years ago

In a physics lab, light with a wavelength of 570 travels in air from a laser to a photocell in a time of 16.5 . When a slab of g

aliina [53]

Answer:

Wavelength is calculated as 213.9 nm

Solution:

As per the question:

Wavelength of light = 570 nm

Time, t = 16.5 ns

Thickness of glass slab, d = 0.865 ns

Time taken to travel from laser to the photocell, t' = 21.3