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
bixtya [17]
3 years ago
9

Car crosses the first third of the road with unknown speed and the rest of the road with the speed of 50 km/h. What is the the s

peed in the first third if the average speed of a car is 30km/h?
Physics
1 answer:
Digiron [165]3 years ago
6 0
40 km/h because the average of 50 and 30 is 40
You might be interested in
Boston Red Sox pitcher Roger Clemens could routinely throw a fastball at a horizontal
azamat

Answer: 0.145 seconds

Explanation:

Given that Roger Clemens could routinely throw a fastball at a horizontal speed of 119.7 m/s. How long did the ball take to reach home plate 17.3 m away

Since the speed is horizontal

Using the formula for speed which is

Speed = distance/time

Where

Speed = 119.7 m/s

Distance covered = 17.3 m

Time is what we are looking for

Substitute all the parameters into the formula

119.7 = 17.3/ time

Make time the subject of formula

Time = 17.3 / 119.7

Time = 0.145 seconds.

Therefore, it will take 0.145 seconds to reach the home plates

6 0
3 years ago
RUE or FALSE: Red hair and freckles is a helpful (good) mutation.
nignag [31]
True!!!!!!!!!!!!!!!!!!!!!
7 0
2 years ago
a physics student throws a stone horizontally off a cliff. one second later, he throws a second identical stone in exactly the s
Virty [35]

The second stone hits the ground exactly one second after the first.

The distance traveled by each stone down the cliff is calculated using second kinematic equation;

h = v_0_yt + \frac{1}{2} gt^2

where;

  • <em>t is the time of motion </em>
  • <em />v_0_y<em> is the initial vertical velocity of the stone = 0</em>

h = \frac{1}{2} gt^2

The time taken by the first stone to hit the ground is calculated as;

t_1 = \sqrt{\frac{2h}{g} }

When compared to the first stone, the time taken by the second stone to hit the ground after 1 second it was released is calculated as

t_2 = \sqrt{\frac{2h}{g} } + 1

t_2 = t_1 + 1

Thus, we can conclude that the second stone hits the ground exactly one second after the first.

"<em>Your question is not complete, it seems be missing the following information;"</em>

A. The second stone hits the ground exactly one second after the first.

B. The second stone hits the ground less than one second after the first

C. The second stone hits the ground more than one second after the first.

D. The second stone hits the ground at the same time as the first.

Learn more here:brainly.com/question/16793944

8 0
3 years ago
Why are earbud wires for an mp3 player coated with plastic
saw5 [17]

2) they add the insulation to better the durability or the earbuds

6 0
3 years ago
Read 2 more answers
find the x-component of this vector 18.4,0.250. Remember, angles are measured from the +x axis. Find the x-component and y-compo
Ksivusya [100]

Answer:

x = 0.237

y = 0.0789

Explanation:

Vector with direction 18.4° and magnitude 0.250 has x and y components of:

x = 0.250 cos 18.4°

x = 0.237

y = 0.250 sin 18.4°

y = 0.0789

7 0
3 years ago
Read 2 more answers
Other questions:
  • Name the missing force... Normal <br>   Spring <br>   Tension <br>   Air Resistance
    8·1 answer
  • Are you ready for a brain twister? murphy can row at 5 kmph in still water. if the velocity of current is 1 kmph and it takes hi
    5·1 answer
  • What is the mass of a steel ball, plastic ball, and a golf ball?
    6·2 answers
  • How to find initial velocity in projectile motion problems when you are not given the vlocity?
    10·1 answer
  • A block is launched up a frictionless 40° slope with an initial speed v and reaches a maximum vertical height h. The same block
    15·1 answer
  • When Lisa placed a balloon to her ear, she was able to hear what her sister was whispering from the other side of the room. When
    6·2 answers
  • Your mom is making lunch which forces are acting on your mom
    6·2 answers
  • Which three statements are true of all matter?
    8·1 answer
  • ASAP Even though the force exerted on each object in a collision is the same strength, if the objects have different masses, the
    5·1 answer
  • How can electricity produce heat and light? ​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!