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2 years ago

A 2kg pumpkin is thrown with a velocity of 15m/s towards a

Physics

1 answer:

Lynna [10]2 years ago

7 0

The force exerted on the pumpkin by

the wall is 600N.

HOW TO CALCULATE FORCE:

The force exerted by the wall on the pumpkin can be calculated by multiplying the mass of the pumpkin by the acceleration.

However, the acceleration of the pumpkin needs to be calculated by the following expression:

a = (v - u)/t

Where;

a = acceleration (m/s²)
v = final velocity (15m/s)
u = initial velocity (0m/s)
t = time (0.05s)

a = (15 - 0)/0.05

a = 15/0.05

a = 300m/s²

F = 2kg × 300m/s²

F = 600N

Therefore, the force exerted on the pumpkin by the wall is 600N.

Learn more about force at: brainly.com/question/20207503?referrer=searchResults

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An expensive vacuum system can achieve a pressure as low as 1.00×10^{-7} N/m^2 at 20ºC . How many atoms are there in a cubic cen

marta [7]

Answer:

$24.70818432141\times 10^7\ atoms$

Explanation:

P = Pressure = $1\times 10^{-7}\ N/m^2$

V = Volume = 1 cm³

n = Amount of substance

N = Number of atoms

$N_A$ = Avogadro's constant = $6.022\times 10^{23}\ /mol$

R = Gas constant = 8.314 J/k mol

T = Temperature = 273.15+20 = 293.15 K

From the ideal gas law

$PV=nRT\\\Rightarrow n=\frac{PV}{RT}$

$n=\frac{N}{N_A}$

$\frac{N}{N_A}=\frac{PV}{RT}\\\Rightarrow N=N_A\times \frac{PV}{RT}\\\Rightarrow N=\frac{1\times 10^{-7}\times 1\times 10^{-6}}{8.314\times 293.15}\times 6.022\times 10^{23}\\\Rightarrow N=24708184.32141\ atoms=24.70818432141\times 10^7\ atoms$

The number of atoms is $24.70818432141\times 10^7\ atoms$

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3 years ago

Question 14 (1 point)

mash [69]

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2 years ago

What are the units for the spring constant, k? A. newton meters B. newton seconds C. newtons/meter D. newtons/second E. newtons/

mr Goodwill [35]

Answer:

C. N/m (newtons/meter)

Explanation:

Since the equation for potential energy for a spring is PE = 1/2kx², after you know <em>k </em>and <em>x</em>, you will get an answer in Joules.

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3 years ago

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Is burning trash a physical change or chemical change?

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2 years ago

Snorkeling by humans and elephants. When a person snorkels, the lungs are connected directly to the atmosphere through the snork

fgiga [73]

Answer:

2354.4 Pa

40221 Pa

Explanation:

$\rho$ = Density = 1000 kg/m³

g = Acceleration due to gravity = 9.81 m/s²

h = Depth

The pressure difference would be

$\Delta P=\rho gh\\\Rightarrow \Delta P=1000\times 0.24\times 9.81\\\Rightarrow \Delta P=2354.4\ Pa$

The pressure difference in the first case is 2354.4 Pa

$\Delta P=\rho gh\\\Rightarrow \Delta P=1000\times 4.1\times 9.81\\\Rightarrow \Delta P=40221\ Pa$

The pressure difference in the second case is 40221 Pa

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3 years ago