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
Xelga [282]
3 years ago
9

A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?

Physics
1 answer:
VLD [36.1K]3 years ago
8 0
Speed = \frac{Distance}{Time} 150 km = 150 000 m Speed = \frac{150000}{7200} Speed = 20.83 m/s, or 75.0 km/h
You might be interested in
Which of the following would be the SI unit to use in measuring the temperature of hot liquid
GREYUIT [131]

Answer:

Kelvin

Explanation:

The SI unit to use in measuring the temperature of hot liquid is kelvin (K)

7 0
3 years ago
Nuclear sizes are expressed in a unit named
o-na [289]

Answer:

Answer is A) Fermi

Explanation:

Fermi is the expressive unit for nuclear sizes. Fermi = 10^-15 meter.

4 0
3 years ago
A football punker attempts to kick the football so that it lands on the ground 67.0 m from where it is kicked and stays in the a
Flauer [41]

To solve this problem we will apply the linear motion kinematic equations. We will find the two components of velocity and finally by geometric and vector relations we will find both the angle and the magnitude of the vector. In the case of horizontal speed we have to

v_x = \frac{x}{t}

v_x = \frac{67}{4.5}

v_x = 14.89m/s

The vertical component of velocity is

-h = v_y t -\frac{1}{2} gt^2

Here,

h = Height

g = Gravitational acceleration

t = Time

v_y = Vertical component of velocity

-1.23 = v_y(4.5)-\frac{1}{2} (9.8)(4.5)^2

-1.23= 4.5v_y - 99.225

v_y = 21.77m/s

The direction of the velocity will be given by the tangent of the components, then

tan\theta = \frac{v_y}{v_x}

\theta = tan^{-1} (\frac{21.77}{14.89})

\theta = 55.59\°

The magnitude is given vectorially as,

|V| = \sqrt{v_x^2+v_y^2}

|V| = \sqrt{14.89^2 +21.77^2}

|V| = 26.37m/s

Therefore the angle is 55.59° and the velocity is 26.37m/s

6 0
3 years ago
In Challenge Example 11.9 (p. 280), after the explosion, suppose that the m1 fragment shot directly north at 12 m/s and the m3 f
Inga [223]

The question is incomplete. The mass of the object is 10 gram and travelling at a speed of 2 m/s.

Solution:

It is given that mass of object before explosion is,m = 10 g

Speed of object before explosion, v = 2 m/s

Let $m_1, m_2 \text{ and}\ m_3$ be the masses of the three fragments.

Let $v_1, v_2 \text{ and}\ v_3$ be the velocities of the three fragments.

Therefore, according to the law of conservation of momentum,

$mv=m_1v_1 +m_2v_2+m_3v_3$

$10 \times 2  \hat i=3 \times 12 \hat{j} + 3(v_{2x} \hat{i}+v_{2y} \hat{j})-4 \times 9 \hat{j}$

So the x- component of the velocity of the m2 fragment after the explosion is,

$3v_{2x} = 20$

∴ $v_{2x} = 6.67 \ m/s$

6 0
3 years ago
Franny drew a diagram to compare images produced by concave and convex lenses.
yanalaym [24]

Answer:

virtual

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • In which direction does the sun appear to move across the sky?
    10·2 answers
  • 100 Points
    14·1 answer
  • An object is thrown with a horizontal velocity of 49.0 mt/sec and a vertical velocity 18.8 mt/sec. How long with the object take
    11·2 answers
  • What kind of situation can you think would be a benefit of reducing friction?
    13·1 answer
  • A convex lens has a focal length of 0.33 m. The object distance is 0.7 m. What is the image distance?
    13·1 answer
  • An is holding an ice cube. What causes the ice to melt?
    9·1 answer
  • If the mass of an object is 10 kg and the
    6·1 answer
  • Which is the best term to describe a chemical reaction in which the reactants have less potential energy than the products?
    15·1 answer
  • You really have a thing for screaming outside. So on a day where the speed of sound is 343 m/s you go outside and scream at a wa
    15·1 answer
  • wishing to collect weather data on a remote island, you come up with an idea for sending a weather balloon to the location. You
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!