3 years ago

Suggest two possible errors in finding the mass of the ruler

1 answer:

5 0

(1) limitations in the sensitivity of the instruments used
(2) imperfections in the techniques used to make the measurement

Hope my answer helped u :)

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Four hundred seventy joules of heat are removed from a heat reservoir at a temperature of 470 K. What is the entropy change of t

11111nata11111 [884]

Answer:

ΔS= -1 J/K

Explanation:

Given data

Heat Q= -470J

Temperature T=470 K

To find

Entropy change ΔS

Solution

We know that the entropy change of system is ΔS is given by

ΔS=Q/T

We have take heat value Q as negative because the heat is removed from heat reservoir

ΔS=(-470J/470K)

ΔS= -1 J/K

8 0

3 years ago

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When an object is falling and reaches a constant velocity, the net force on the object is ____ and the weight of the object is e

Maslowich

When an object is falling and reaches a constant velocity, the net force on the object is zero (it's not accelerating), and the weight of the object is equal to the force of air resistance against the object. (choice-D)

5 0

3 years ago

.2, A car starting from rest has an acceleration of

riadik2000 [5.3K]

Answer: 2.5 m/s and 6.25 m

Explanation:

u = 0

a = 0.5 m/s²

t = 5 s

v = u + at

= 0 + 0.5 × 5

= 2.5 m/s

s = ut + 1/2 at²

= 1/2 × 2.5 × 5

= 6.25 m

7 0

4 years ago

You can answer this to get points its not an actual question

larisa86 [58]

Answer:

the electromagnetic pulse

Explanation:

8 0

3 years ago

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Which formulas have been correctly rearranged to solve for radius? Check all that apply. r = GM central/v^2 r =fcm/v^2 r =ac/v^2

jek_recluse [69]

The orbital radius is: $r=\frac{GM}{v^2}$

Explanation:

The problem is asking to find the radius of the orbit of a satellite around a planet, given the orbital speed of the satellite.

For a satellite in orbit around a planet, the gravitational force provides the required centripetal force to keep it in circular motion, therefore we can write:

$\frac{GMm}{r^2}=m\frac{v^2}{r}$