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Vesnalui [34]
4 years ago
7

I will mark you as brainliest. if you answer my question

Physics
1 answer:
Shalnov [3]4 years ago
5 0

First, let's list everything we have...

a = 1.83 m/s^2

F = 1870 N (converted from kN to N)

vi = 0 m/s (it says started from rest, therefore velocity starts at 0)

t = 16 s

1). "Force acting on the car" is a bit ambiguous because there are many forces. But I'm going to assume that they are looking for just a basic implementation of force equation:

F=ma

where:

F = force

m = mass

a = acceleration

2). I recommend memorizing your equations of motion, because once you know them this part is also just as easy:

v_f=v_i+at

where:

vf = final velocity

vi = initial velocity

a = acceleration

t = time

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The sympathetic nervous system ____________digestion and _____________blood pressure. (2 points)
Talja [164]

Answer:

The sympathetic nervous system _____decelerates_______digestion and __accelerates___________blood pressure. See the explanation below, please.

Explanation:

The sympathetic nervous system together with the parasympathetic make up the autonomic nervous system. The sympathetic system acts in situations of stress, prepares the body for "fight or flight", increases heart rate and blood pressure at the cardiovascular level, at the digestive level it slows down the system, produces bronchodilation, pupil dilation (mydriasis).

3 0
4 years ago
A 55.0 g hard-boiled egg moves on the end of a spring with force constant 25.0 N/m. Its initial displacement 0.500 m. A damping
aliya0001 [1]

Answer:

0.0354 kg/s

Explanation:

A_1 = Initial displacement = 0.5 m

A_2 = Final displacement = 0.1 m

m = Mass of egg = 55 g

t = Time taken = 5 seconds

Displacement of the oscillator under damping motion is given by

x=Ae^{-\frac{b}{2m}t}cos(\omega't+\phi)

For maximum displacement

cos(\omega't+\phi)=1

A_2=A_1e^{-\frac{b}{2m}t}

From this equation we get

b=\frac{2m}{t}ln\frac{A_1}{A_2}\\\Rightarrow b=\frac{2\times 0.055}{5}ln\frac{0.5}{0.1}\\\Rightarrow b=0.0354\ kg/s

The magnitude of the damping constant is 0.0354 kg/s

8 0
3 years ago
How much heat is necessary to increase temperature of 4 kg water from 20 degree Celsius to 80 degree Celsius?
Svetlanka [38]

Answer:

2.4 × 10⁵ cal

Explanation:

Step 1: Given data

  • Mass of water (m): 4 kg
  • Initial temperature: 20°C
  • Final temperature: 80°C
  • Specific heat capacity of water (c): 1 cal/g.°C

Step 2: Convert the mass to grams

We will use the relationship 1 kg = 1,000 g.

4kg \times \frac{1,000g}{1kg} = 4,000 g

Step 3: Calculate the change in the temperature

\Delta T = T_f - T_i = 80 \° C - 20 \° C = 60 \° C

Step 4: Calculate the heat required (Q)

We will use the following expression.

Q = c \times m \times \Delta T = \frac{1cal}{g. \° C}  \times 4,000 g \times 60  \° C =  2.4 \times 10^{5} cal

8 0
3 years ago
A fox runs for 12 seconds at a speed of 9.65 m/s. How much distance does it cover? Exact answer, do NOT round.
Stella [2.4K]

Answer:

115.8

Explanation:

7 0
4 years ago
On earth’s surface, how much does a 100 kg mass weigh?
o-na [289]

Weight = (mass) x (gravity)

Weight = (100kg) x (9.8 m/s^2)

Weight = 980 kg-m/s^2

Weight = 980 Newtons.

(about 220.5 pounds)

6 0
3 years ago
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