Ask question

Ask question

All categories

2 years ago

9

3. A rock is lying on a rock ledge that is 3 m high. The rock as 120 J of potential energy.

1 answer:

n200080 [17]2 years ago

6 0

Answer:

For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters. Notice that gravitational potential energy has the same units as kinetic energy, kg m2 / s2.

Step-by-step explanation:

You might be interested in

Please help with number one! I’m stressed because I haven’t been passing my tests lately and I just don’t understand the informa

ella [17]

Scale facor of 3.7. BAAAAM

8 0

3 years ago

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e

gizmo_the_mogwai [7]

Answer:

The large sample n = 1713.96

Step-by-step explanation:

<u>Explanation</u>:-

given the population proportion was estimated to be 0.22

population proportion (P) = 0.22

The 95 % level of significance = 1.96≅ 2

The margin of error = 0.02

The formula of margin error

$\frac{2\sqrt{p(1-p)} }{\sqrt{n} } = 0.02$ … ( i )

Substitute 'p' values in equation (1)

$\frac{2\sqrt{0.22(1-0.22)} }{\sqrt{n} } = 0.02$

cross multiplication and simplification, we get

$2X0.414= 0.02 \sqrt{n}$

$\frac{2X0.414}{0.02} = \sqrt{n}$

$41.4 = \sqrt{n}$

squaring on both sides, we get

the large sample n = 1713.96

7 0

3 years ago

Fill in the blank with the correct word(s) to complete the sentence.

AnnyKZ [126]

Answer:

pattern

Step-by-step explanation:

.............................................

7 0

3 years ago

10 PTS!<br> Level 4 algebra. <br> Please show all work!!!<br><br> 4 (3x - 5) + 2 (x + 3) = 1

Ratling [72]

12x-20+2x+6=1

14x=21

x=21/14=3/2

8 0

3 years ago

Read 2 more answers

A sample of 2,000 union members was selected, and a survey recorded their opinions regarding a proposed management union contrac

zzz [600]

Answer:

a

Step-by-step explanation:

6 0

2 years ago