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drek231 [11]
2 years ago
13

An antelope is being chased across the savannah by a hungry lion. The lion runs at a

Physics
2 answers:
Paul [167]2 years ago
8 0

Answer:It can run in the same direction but it increases its speed.

Explanation:

melamori03 [73]2 years ago
7 0

Sorry no idea..... I feel bad but still

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Whats the force of a pitching machine on a baseball
ira [324]

Answer:

kinetic

Explanation:

8 0
3 years ago
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To determine the muzzle velocity of a bullet fired from a rifle, you shoot the 2.47-g bullet into a 2.43-kg wooden block. The bl
Elza [17]

Answer:

The velocity of the bullet on leaving the gun's barrel is 236.36 m/s.

Explanation:

Given;

mass of the bullet, m₁ = 2.47 g = 0.00247 kg

mass of the wooden block, m₂ = 2.43 kg

initial velocity of the wooden block, u₂ = 0

height reached by the bullet-block system after collision = 0.295 cm = 0.00295 m

let the initial velocity of the bullet on leaving the gun's barrel = v₁

let final velocity of the bullet-wooden block system after collision = v₂

Apply the principle of conservation of linear momentum;

Total initial momentum = Total final momentum

m₁v₁ + m₂u₂ = v₂(m₁ + m₂)

0.00247v₁  + 2.43 x 0  =  v₂(2.43 + 0.00247)

0.00247v₁ = 2.4325v₂ -------(1)

The kinetic energy of the bullet-block system after collision;

K.E = ¹/₂(m₁ + m₂)v₂²

K.E = ¹/₂ (2.4325)v₂²

The potential energy of the bullet-block system after collision;

P.E = mgh

P.E = (2.4325)(9.8)(0.00295)

P.E = 0.07032

Apply the principle of conservation of mechanical energy;

K.E = P.E

¹/₂ (2.4325)v₂² = 0.07032

1.21625 v₂²  = 0.07032

v₂²  = 0.07032  / 1.21625

v₂² = 0.0578

v₂ = √0.0578

v₂ = 0.24 m/s

Substitute v₂ in equation (1), to obtain the initial velocity of the bullet;

0.00247v₁ = 2.4325v₂

0.00247v₁ = 2.4325 (0.24)

0.00247v₁ = 0.5838

v₁ = 0.5838 / 0.00247

v₁ = 236.36 m/s

Therefore, the velocity of the bullet on leaving the gun's barrel is 236.36 m/s.

5 0
3 years ago
The number of single covalent bonds that most non metallics can form
Veronika [31]
Nonmetals will readily form covalent bonds with other nonmetals in order to obtain stability, and can form anywhere between one to three covalent bonds with other nonmetals depending on how many valence electrons they posses.
8 0
3 years ago
The current supplied by a battery as a function of time is ) -(0.64 A)e-/(6.0 hr). What is the total number of electrons transpo
Paha777 [63]

Answer:

The total number of electrons is 8.6\times10^{22}

(3) is correct option.

Explanation:

Given that,

The current equation is

I=0.64 e^{\dfrac{-t}{6.0 hr}}

We know that,

The formula of charge

q=\int_{0}^{\infty}{I dt}

q=\int_{0}^{\infty}{0.64 e^{\dfrac{-t}{6.0 hr}}dt

q=0.64\int_{0}^{\infty}{e^{\dfrac{-t}{6.0 hr}}dt

q=0.64\int_{0}^{\infty}{e^{\dfrac{-t}{21600}}dt

q=0.64(21600e^{\dfrac{-t}{21600}})_{0}^{\infty}

q=0.64(0-21600)

q=0.64\times21600

q=13824\ C

We need to calculate the number of electron

Using formula of charge

q=ne

n=\dfrac{q}{e}

n=\dfrac{13824}{1.6\times10^{-19}}

n=8.6\times10^{22}

Hence, The total number of electrons is 8.6\times10^{22}

7 0
3 years ago
Which missing item would complete this beta decay reaction?
Flauer [41]
For us to understand the missing item that would complete beta decay reaction, we need to achieve in depth understanding of chemical formulas and nuclear symbols. Next is to have great comprehension of the following points:
<span>1.) Neutron in nucleus breaks down and changes into a proton.
2) Then it emits an electron, as well as an anti-neutrino which go into space.
3) Lastly, atomic number continuously goes UP while mass number remains unchanged.</span>
8 0
3 years ago
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