Answer:
Explanation:
2.1 km = 2100 m
1.68 km = 1680 m
a ) Time taken by wild beast to travel 1680 m
= 1680 / 19 = 88.42 s
Time taken by wild beast to travel 2100 m
2100 / 19 = 110.52 s
distance travelled by chicken in 88.42 s
= 88.42 x 3.3 = 291.78 s
Its distance from the end point
= 2100 - 291.78 = 1808.22m
b ) Time taken by chicken to travel 2100 m
= 2100 / 3.3 = 636.36 s
Both reach simultaneously so , time of resting by wild beast
= 636.36 - 110.52 = 525.84 s .
Complete Question
A boy throws a ball on a spring scales which oscillates about the equilibrium position with a period of T = 0.5 sec. The amplitude of the vibration is A = 2 cm. Assume the ball does not bounce from the scales’s surface afterwards. Assume the vibration of the scale is expressed mathematically as x(t) = Acos(t + ). Find:
a) frequency
b) the maximum acceleration
c) the maximum velocity
Answer:
a
b
c
Explanation:
From the question we are told that
The period is
The amplitude is
The vibration of the scale is
Generally the frequency is mathematically represented as
=>
=>
The maximum acceleration is mathematically represented as
=>
=>
The maximum velocity is mathematically represented as
=>
=>
<h2>
Oxygen is moving at 483.63 m/s</h2>
Explanation:
Kinetic energy = 0.5 x Mass x Velocity²
Kinetic energy = 6.21 x 10⁻²¹ J
Mass = 5.31 x 10⁻²⁶ kg
Substituting
Kinetic energy = 0.5 x Mass x Velocity²
6.21 x 10⁻²¹ = 0.5 x 5.31 x 10⁻²⁶ x Velocity²
Velocity² = 2.34 x 10⁵
Velocity = 483.63 m/s
Oxygen is moving at 483.63 m/s
Explanation:
<em>S</em><em>p</em><em>e</em><em>e</em><em>d</em><em> </em><em>is </em><em> </em><em>defi</em><em>ned</em><em> </em><em>as </em><em>distance</em><em> </em><em>per</em><em> </em><em>tim</em><em>e</em><em> (</em><em>mil</em><em>es</em><em> </em><em>per</em><em> </em><em>hou</em><em>r</em><em> </em><em>or</em><em> </em><em>meter</em><em> </em><em>per</em><em> </em><em>se</em><em>cond</em><em>)</em>
We find the work using the formula as written below:
W = mgh/t
where
m is mass
g is gravity equal to 9.81 m/s²
h is the height
t is time
W = (81 kg)(9.81 m/s²)(3 m)/10 s = 238.38 W
To convert:
238.38 W( 1 hp/746 W) =<em> 0.32 hp</em>