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Levart [38]
3 years ago
10

What happens in a chemical reaction?

Physics
1 answer:
Dimas [21]3 years ago
3 0

Answer:

d.  Atoms are rearranged.

Explanation:

In a chemical reaction, what happens is that atoms are simply rearranged when the process takes place.

According to the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but atoms are simply rearranged".

Therefore:

  1. Atoms are not created
  2. Atoms are not destroyed
  3. Atoms are simply rearranged.
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A car is traveling at 21m/s. It accelerates at 1.4m/s2 for 11s. How fast is the car moving after the acceleration?
nata0808 [166]

Answer:

v=u+at

v=21+1.4(11)

v=21+15.4

v=36.4

3 0
3 years ago
The velocity of the transverse waves produced by an earthquake is 5.05 km/s, while that of the longitudinal waves is 8.585 km/s.
sattari [20]

Answer:

d=691.71km

Explanation:

The time lag between the arrival of transverse waves and the arrival of the longitudinal waves is defined as:

t=\frac{d}{v_t}-\frac{d}{v_l}

Here d is the distance at which the earthquake take place and v_t, v_l is the velocity of the transverse waves and longitudinal waves respectively. Solving for d:

t=d(\frac{1}{v_t}-\frac{1}{v_l})\\d=\frac{t}{\frac{1}{v_t}-\frac{1}{v_l}}\\d=\frac{56.4s}{\frac{1}{5.05\frac{km}{s}}-\frac{1}{8.585\frac{km}{s}}}\\d=691.71km

8 0
3 years ago
What Organ filters the blood to remove the waste
Marysya12 [62]
The answer to your question is kidneys
4 0
3 years ago
Read 2 more answers
A 2200-kg railway freight car coasts at 4.1 m/s underneath a grain terminal, which dumps grain directly down into the freight ca
777dan777 [17]

Answer:

The answer is "2.41 \times 10^3"

Explanation:

Given:  

m_i = 2000 \ kg \\\\v_i= 4.1 \ \frac{m}{s} \\\\v_f = 3.4 \ \frac{m}{s} \\

Using formula:  

\to m_iv_i = m_fv_f \\\\\to m_f= \frac{m_iv_i}{v_f}

p_i, p_f = system initial and final linear momentum.

V_i, v_f = system original and final linear pace.

m_i = original weight of the car freight.

m_f= car's maximum weight

= \frac{ 2000 \times 4.1}{3.4}\\\\= \frac{ 8.2\times 10^3}{3.4}\\\\= 2.41 \times 10^3

\boxed{m_f = 2.41 \times 10^3}

8 0
2 years ago
A tiger paces back and forth along the front of its cage, which is 8 m wide. The tiger starts from the right side of the cage, p
Black_prince [1.1K]

Answer:

The total distance is 24 m.

The tiger's resultant displacement is 8 m.

Explanation:

Given that,

Width of tiger= 8 m

Tiger starts from the right side of the cage,

Paces to the left side

\Delta x_{1}=+8\ m

Then, back to the right side,

\Delta x_{2}=-8\ m

finally, back to the left

\Delta x_{3}=+8\ m

We need to calculate the total distance covered

Using formula of distance

d= x_{1}+x_{2}+x_{3}

Put the value into the formula

d=8+8+8

d=24\ m

We need to calculate the tiger's resultant displacement

Using formula of displacement

D=\Delta x_{1}+\Delta x_{2}+\Delta x_{3}

Put the value into the formula

D=8+(-8)+8

D=8\ m

Hence, The total distance is 24 m.

The tiger's resultant displacement is 8 m.

3 0
3 years ago
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