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hjlf
2 years ago
15

IN nuclear in oder to slow down fast neutron the target material should contain

Physics
1 answer:
stealth61 [152]2 years ago
8 0

Answer:

it depends if it is alpha ,beta or gamma

Explanation:

if alpha use paper

if beta use some clothing or aluminium

if it is gamma use lead

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A plane flies from alphaville to betaville and then back to alphaville. when there is no wind, the round trip takes 4 hours and
kykrilka [37]
Refer to the diagram shown below.

d =  distance (miles) from Alphaville to Betaville.
v = speed (mph) of the plane with no wind.

With no wind:
The time taken to travel a distance of 2d is 4 hrs, 48 min = 4.8 hrs.
Therefore
2d/v = 4.8
v = 2d/4.8 = 0.4167d mph             (1)

With the wind:
The velocity from Alphaville to Betaville is (v + 100) mph.
The time of travel is
t₁ = d/(v+100) h
The velocity from Betaville to Alphaville is (v - 100) mph.
The time of travel is
t₂ = d/)v-100) h
Because the return trip takes 5 hours, therefore
t₁ + t₂ = 5
\frac{d}{v+100} + \frac{d}{v-100} =5 \\ \frac{2vd}{v^{2}-100^{2}} =5 \\ 2vd = 5(v^{2}-10^{4})            (2)

From (1), obtain
2(0.4167)d² = 5[(0.4167d)² - 10⁴]
0.8334d² = 0.8682d² - 5 x 10⁴
0.0348d² = 5 x 10⁴
d = 1198.7 mi

Answer: 1199 miles (nearest integer)

8 0
4 years ago
Why you must always give a unit<br> when reporting a measurement?
katrin2010 [14]

Unit of measurement are globally recognized and necessary for sharing information between scientists around the world.

An accepted quantity that is used to represent a physical quantity is called a measurement unit. A unit of measurement is a specific magnitude of a quantity that has been established and recognized by law or convention and is used as a benchmark for measuring other quantities of the same kind. A multiple of the unit of measurement can be used to express any other quantity of that type. A length is an example of a physical quantity.

A unit of measurement is a specific magnitude of a quantity that has been established and recognized by law or by convention and is used as a reference for measuring other quantities of the same kind.

To learn more about unit of measurement please visit -
brainly.com/question/15402847
#SPJ9

8 0
2 years ago
Determine the acceleration of the box of mass 140 kg, when a net force of 900 N acts on it.​
Georgia [21]

Answer:

a = 6.4 m/s²

Explanation:

a = F/m = 900 / 140 = 6.428571... m/s²

8 0
3 years ago
What causes the phases of our moon
Helga [31]

sunlight, and the position of the earth

4 0
4 years ago
A missile is fired from a jet flying horizontally at Mach 1 (1100 ft/s). The missile has a horizontal acceleration of 1000 ft/s
gayaneshka [121]
V = u + a*t = 1100ft/s + (1000*10) ft/s = 11100 ft/s 
Answer is <span>11,100 ft/s  </span>
5 0
3 years ago
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