1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mash [69]
4 years ago
8

A car was moving at 30m/s when it hit a pole. It took 2 seconds to come to a stop. What was the car's acceleration in the crash

Physics
1 answer:
LuckyWell [14K]4 years ago
3 0
A = v/t = 30/2 = 15 m/s
You might be interested in
Why do some kinds of ice on Earth change the sea level when they melt while others do not?
maxonik [38]
Some ice has more salt then the other causing it to float up
6 0
4 years ago
What is potential energy?
iVinArrow [24]
energy associate with position or shape
5 0
4 years ago
Cierto volumen de gas se encuentra a 60°c de temperatura y 5atm de presión, es calentado hasta 140°c, estado en el cual ocupa un
earnstyle [38]

Answer:

V1 = 2221.33 L

Explanation:

The system is about a ideal gas. Then you can use the equation for ideal gases for a volume V1, temperature T1 and pressure P1:

P_1V_1=nRT_1   (1)

And also for the situation in which the variables T, V and P has changed:

P_2V_2=nRT_2   (1)

R: constant of ideal gases = 0.082 L.atm/mol.K

For both cases (1) and (2) the number of moles are the same. Next, you solve for n in (1) and (2):

n=\frac{P_1V_1}{RT_1}\\\\n=\frac{P_2V_2}{RT_2}

Next, you equal these equations an solve for T2:

\frac{P_1V_1}{RT_1}=\frac{P_2V_2}{RT_2}\\\\V_1=\frac{P_2V_2T_1}{P_1T_2}

Finally you replace the values of P2, V2, T1 and T2:

V_1=\frac{(7atm)(680L)(140\°C)}{(60\°C)(5atm)}=2221.33\ L

Hence, the initial volume of the gas is 2221.33 L

5 0
4 years ago
Calculate the wavelength of an electron (m = 9.11 × 10-28 g) moving at 3.66 × 106 m/s.
valina [46]
The answer is 1.99 × 10⁻¹⁰ m.

To calculate this we will use De Broglie wavelength formula:
<span>λ = h/(m*v)
</span><span>λ - the wavelength
</span>h - Plank's constant: h = 6.626 × 10⁻³⁴ Js
v - speed
m - mass

It is given:
<span>λ = ?
</span>m = 9.11 × 10⁻²⁸<span> g
v = </span>3.66 × 10⁶<span> m/s

After replacing in the formula:
</span>λ = h/(m*v) = 6.626 × 10⁻³⁴ /(9.11 × 10⁻²⁸ * 3.66 × 10⁶) = 1.99 × 10⁻¹⁰ m
6 0
3 years ago
Read 2 more answers
How do you call a number of waves that pass a given point in a specific time, commonly one second.
Lubov Fominskaja [6]
That's the "frequency" of the wave.
8 0
3 years ago
Other questions:
  • Officials begin to release water from a full man-made lake at a rate that would empty the lake in 4 weeks, but a river that can
    11·1 answer
  • A big defensive lineman picks up a fumbled football and begins rumbling toward the end zone. His mass is 150 kg, and his velocit
    13·1 answer
  • Consider a heat engine that inputs 10 kJ of heat and outputs 5 kJ of work. What are the signs on the total heat transfer and tot
    5·1 answer
  • Based on the image below what would an observer on the nighttime side of earth observe?
    12·1 answer
  • Does anyone know how to solve this??
    6·1 answer
  • A parallel-plate capacitor has plates of area 0.40 m2 and plate separation of 0.20 mm. The capacitor is connected to a 9.0 V bat
    6·1 answer
  • The object having uniform velocity has zero acceleration, why?
    12·1 answer
  • Jake lifted a 10-kg bell by a distance of 0.50 meters in 0.50 seconds. How much power did Jake use?​
    9·1 answer
  • What does it mean when di is negative?
    13·1 answer
  • Jerome does not pay his balances off his credit cards each month. He often has to pay interest and finance charges. What is Jero
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!