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
Leya [2.2K]
2 years ago
5

How far does a car travel in 30.0 s while its velocity is changing from 50.0 km/h to 80.0 km/h at a uniform rate of acceleration

?
Physics
1 answer:
pochemuha2 years ago
7 0

Answer:

v = u + a t

80 = 50 + a * 30

80 - 50 /30 = a

a = 30/30 = 1 m /s 2

s = u t + 1/2 at ^2

s = 50 * 30 + 1/2 * 1 * 30^2

s = 1500 + 1/2 * 900

s = 1500 + 450

s = 1950 m

You might be interested in
A dart gun consists of a horizontal spring with k = 52 Newtons/m that is compressed 43
gulaghasi [49]

Answer:

299 m/s^2

Explanation:

When a spring is compressed, the force exerted by the spring is given by:

F=kx

where

k is the spring constant

x is the compression of the spring

In this problem we have:

k = 52 N/m is the spring constant

x = 43 cm = 0.43 m is the compression

Therefore, the force exerted by the spring on the dart is

F=(52)(0.43)=22.4 N

Now we can apply Newton' second law of motion to calculate the acceleration of the dart:

F=ma

where

F = 22.4 N is the force exerted on the dart by the spring

m = 75 g = 0.075 kg is the mass of the dart

a is its acceleration

Solving for a,

a=\frac{F}{m}=\frac{22.4}{0.075}=299 m/s^2

7 0
3 years ago
A uranium ion and an iron ion are separated by a distance of =61.10 nm. The uranium atom is singly ionized; the iron atom is dou
scoray [572]

Answer:

Explanation:

Charge on uranium ion = charge of a single electron

= 1.6 x 10⁻¹⁹ C

charge on doubly ionised iron atom = charge of 2 electron

= 2 x 1.6 x 10⁻¹⁹ C = 3.2 x 10⁻¹⁹ C

Let the required distance from uranium ion be d .

force on electron at distance d from uranium ion

= 9 x 10⁹ x 1.6 x 10⁻¹⁹ / r²

force on electron at distance 61.10 x 10⁻⁹ - r from iron  ion

= 9 x 10⁹ x 3.2 x 10⁻¹⁹ / (61.10 x 10⁻⁹ - r )²

For equilibrium ,

9 x 10⁹ x 1.6 x 10⁻¹⁹ / r² = 9 x 10⁹ x 3.2 x 10⁻¹⁹ / (61.10 x 10⁻⁹ - r )²

2 d² = (61.10 x 10⁻⁹ - r )²

1.414 r = 61.10 x 10⁻⁹ - r

2.414 r = 61.10 x 10⁻⁹

r = 25.31 nm .

4 0
3 years ago
Releases hydrogen ions in water is that acid or bases?
wolverine [178]
Acid it is i believe........
6 0
3 years ago
1. Driving at slower speeds than traffic flow _____________ .
r-ruslan [8.4K]

<u>The correct option is (D). The strength of electric field depends on the amount of charge that produces the field as well as the distance from the charge. </u>

<u> </u>

Further Explanation:

The electric field intensity at a point is the measure of the force exerted by a charge particle on another charge particle in the particular area of its strength.

The electric field intensity at a distance d due to a static charge having charge q is directly proportional to the amount of charge and inversely proportional to the square of the distance between them.

The Electric field intensity due to a charge is given as:

E = \dfrac{1}{{4\pi {\varepsilon _0}}}\frac{q}{{{r^2}}}

Here, E is the electric field intensity, q is the amount of charge and r is the distance of the charge from the point.

The above expression of electric field shows that the electric field intensity at a point depends on the amount of charge as well as the distance of the point from the charge.

<u>Thus, the correct option is (D). The strength of electric field depends on the amount of charge that produces the field as well as the distance from the charge. </u>

<u> </u>

Learn More:

1. The results of Rutherford’s gold foil experiment demonstrated that thehttps://brainly.com/question/1542931

2. A capacitor with capacitance (c) = 4.50 μf is connected to a 12.0 v batteryhttps://brainly.com/question/8892837

3. A point charge of 7.45 pc is fixed at the originhttps://brainly.com/question/11098511

Answer Details:

Grade: Senior school

Subject: Physics

Chapter: Electrostatics

Keywords:  Strength, electric field, charge, distance, electric field intensity, magnitude of charge, electrostatic, test charge, kq/r^2.

7 0
3 years ago
Read 2 more answers
Drug abuse is characterized by _____.
arlik [135]
There can be mental health effects and psychological dependence
8 0
3 years ago
Read 2 more answers
Other questions:
  • Sound waves that start in air can move into water. This is because it is __________ that is transferred and not .
    7·1 answer
  • Lila is using a Bunsen burner. She has all of her chemicals on her workstation. Which would be the best lab practice?
    10·2 answers
  • If element X has 96 protons, how many electrons does it have
    11·1 answer
  • A model rocket is launched straight upward with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration
    8·1 answer
  • HELP ASAP! <br>why is rolling friction much smaller than sliding friction? Also give an example.​
    15·1 answer
  • If the work done to stretch an ideal spring by 4.0 cm is 6.0 j, what is the spring constant (force constant) of this spring?
    11·1 answer
  • At atom whose valence electron shell is nearly full is ________ chemically reactive. a. not b. mildly c. highly d. the name of t
    13·2 answers
  • The effects of repeated temperature changes within the cracks in rocks can cause ______ weathering.
    8·2 answers
  • A young athlete has a mass of 42 kg. On a day when there is no wind she runs a 100m race in 14.2
    7·1 answer
  • if a person can jump 2m in earth surface how high can he jump in the moon (g of moon = 1.66m/s, g of earth = 9.8 m/s) [hint: use
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!