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
melomori [17]
3 years ago
6

A high-speed train accelerates at a constant rate in a straight line.

Physics
1 answer:
Brilliant_brown [7]3 years ago
8 0

Answer:

1/2

Explanation:

change=

\frac{60 - 30}{60}  =  \frac{30}{60}  =  \frac{3}{6}  =  \frac{1}{2}

You might be interested in
A. Telephone signals are often transmitted over long distances by microwaves. What is the frequency of microwave radiation with
zzz [600]

(a) 10 GHz is the frequency of microwave radiation.

(b) 0.167 ms is required by the microwave to travel between two mountains.

Answer:

Explanation:

(a). 1 MHz is the frequency of microwave radiation.

(b)  0.167 ms is required by the microwave to travel between two mountains.

Answer:

Explanation:

a. Frequency is the measure of number of times a same thing will be repeated in a given time interval for a given time. And wavelength is the measure of distance between two successive crests or troughs. So wavelength and frequency are inversely proportional to each other. And velocity of light is the proportionality constant.

So frequency of microwave radiation = Speed of light/Wavelength of radiation

Frequency = \frac{3*10^{8} }{3*10^{-2} }

Frequency = 10^{8+2} = 10^{10}=10 GHz

So 10 GHz is the frequency of microwave radiation.

b). As microwave is a part of light waves, so it will be experiencing the speed of light.

As the speed is 3*10^{8} m/s and the distance between the two mountains is given as 50 km, then time can be calculated as

Time = Distance/Velocity

Time = \frac{50*10^{3} m}{3*10^{8} }=16.67*10^{3-8}=16.67*10^{-5}

So time = 0.167 ms.

Thus, 0.167 ms is required by the microwave to travel between two mountains.

6 0
3 years ago
Are individual organelles (cell structures) living? Explain
Julli [10]
All cells are living however organelles are not living there are no organisms that consist of just a single cell
3 0
3 years ago
Read 2 more answers
Think about the way optical fibers are designed. why are the ends of the fibers glowing very brightly while the sides of the fib
Effectus [21]

Answer:

D. because the light is reflected back into the fiber along its sides

Explanation:

The fiber is constructed in a way that the light is bent/reflected/refracted toward the center core of glass. So, from the center core, there is a layer above it that has a different propagation than the core, and above that the same thing. To give you a real world visual example, if you look down in a pool of water, then stick a straight stick into it, you see that the straight stick appears to bend. That is what is happening to the light as it travels through a different medium (air to water). This same effect is incorporated in the fiber optic cable construction.

6 0
2 years ago
A 0.49-kg cord is stretched between two supports,7.3m apart. When one support is struck by a hammer, a transverse wave travels d
Wewaii [24]

Answer:

T= 5.18N

Explanation:

u = mass of chord / length of chord

u = 0.49/ 7.3

u = 0.067 kg/m

Velocity of sound waves (v) =length of chord / time taken for wave to travel

v = 7.3 / 0.83 = 8.795m/s

Tension is calculated below using the formula

T = v² * u

T = (8.795)² x 0.067

T= 5.18N

3 0
3 years ago
Which theory was first proposed by Albert Einstein? A. the theory of special relativity B. the theory of universal gravitation C
balu736 [363]

A. the theory of special relativity

6 0
3 years ago
Read 2 more answers
Other questions:
  • At very close range, which of these forces is stronger than the gravitational force a.) electric only, b.) magnetic only c.) ele
    9·2 answers
  • What are the four different types of economic resources?
    15·1 answer
  • 1.(16 pts.) Find the volume of the solid obtained by revolving the region enclosed by y = xex , y = 0 and x = 1 about the x-axis
    15·1 answer
  • A car starts from rest at a stop sign. It accelerates at 4.0 m/s2 for 3 seconds, coasts for 2 s, and then slows down at a rate o
    14·1 answer
  • Which equations can be used to solve for acceleration
    8·2 answers
  • An airplane flies with a constant speed<br> of 720 km/h. How far can it travel in<br> 3 hours
    7·1 answer
  • Lasers can be used in<br> in place of a knife.
    8·1 answer
  • A feather, a tennis ball, and a bowling ball are dropped from a high tower on
    15·1 answer
  • The projectile launcher shown below will give the object on the right an initial horizontal speed of 5.9 m/s. While the other ob
    10·1 answer
  • When you squeeze one end of an inflated balloon, the other end bulges out.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!