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
statuscvo [17]
3 years ago
12

In a race, Usain bolt accelerates at 1.99 m/s^2 for the first 60.0 m, then decelerates at -0.266 m/s^2 for the final 40.0 m. How

much time did the race take?
Physics
1 answer:
GalinKa [24]3 years ago
6 0
7 miles long i think bc i dont know bc i am bad at math and math is good
You might be interested in
When do vernal equinoxes usually occur? autumnal?
shepuryov [24]

Spring tides occur twice each lunar month all year long without regard to the season. Neap tides, which also occur twice a month, happen when the sun and moon are at right angles to each other. ... The moon appears full when the Earth is between the moon and the sun

7 0
3 years ago
Is the momentum of a car traveling south always the same as the momentum of a car traveling north at the same speed? Explain.
inessss [21]
If the two cars traveling opposite directions have the same mass, then yes, the momentum of a car traveling south will have the same momentum as a car traveling north at the same speed.
8 0
4 years ago
Where are volcanoes located(in terms of the plates)?
taurus [48]

Most volcanoes are found at convergent or divergent plate boundaries, but intraplate volcanoes are found in the middle of a tectonic plate.

4 0
4 years ago
A beam of protons is moving toward a target in a particle accelerator. This beam constitutes a current whose value is. (a) How m
Gelneren [198K]

Answer:

a. 5 × 10¹⁹ protons b. 2.05 × 10⁷ °C

Explanation:

Here is the complete question

A beam of protons is moving toward a target in a particle accelerator. This beam constitutes a current whose value is 0.42 A. (a) How many protons strike the target in 19 seconds? (b) Each proton has a kinetic energy of 6.0 x 10-12 J. Suppose the target is a 17-gram block of metal whose specific heat capacity is 860 J/(kg Co), and all the kinetic energy of the protons goes into heating it up. What is the change in temperature of the block at the end of 19 s?

Solution

a.

i = Q/t = ne/t

n = it/e where i = current = 0.42 A, n = number of protons, e = proton charge = 1.602 × 10⁻¹⁹ C and t = time = 19 s

So n = 0.42 A × 19 s/1.602 × 10⁻¹⁹ C

       = 4.98 × 10¹⁹ protons

       ≅ 5 × 10¹⁹ protons

b

The total kinetic energy of the protons = heat change of target

total kinetic energy of the protons = n × kinetic energy per proton

                                                         = 5 × 10¹⁹ protons × 6.0 × 10⁻¹² J per proton

                                                         = 30 × 10⁷ J

heat change of target = Q = mcΔT ⇒ ΔT = Q/mc where m = mass of block = 17 g = 0.017 kg and c = specific heat capacity = 860 J/(kg °C)

ΔT = Q/mc = 30 × 10⁷ J/0.017 kg × 860 J/(kg °C)

     = 30 × 10⁷/14.62

     = 2.05 × 10⁷ °C

5 0
3 years ago
A pen rolls off a 0.55–meter high table with an initial horizontal velocity of 1.2 meters/second. At what horizontal distance fr
levacccp [35]
To calculate the horizontal distance traveled by the ball, we first calculate the total time it takes to reach the ground as follows:


t = √[2y/g] = <span>√[2(0.55) / 9.81]
t = 0.33 s

The horizontal distance would be

</span><span>X = Vx*t = 1.2*√[2*.55/9.8] = 0.4 m
</span>
Hope this helps. 
4 0
3 years ago
Read 2 more answers
Other questions:
  • Highlight each sentence that is true about atoms, matter, and electric charge.
    14·1 answer
  • Ken’s community is completely dependent on agriculture for their income. They cultivate and breed domestic species for their foo
    9·2 answers
  • Which image shows an inclined plane?
    7·2 answers
  • PLEASE HELP ASAP: Wave Y and wave Z are two types of electromagnetic waves traveling through a vacuum. Suppose the frequency of
    10·2 answers
  • If the same force is exerted on objects with different mass, then the object with less mass have a (smaller or bigger -pick one)
    11·1 answer
  • Write the formula of mechanical advantage​
    7·1 answer
  • SCIENCE whoever gets this first will get a brainlest
    9·2 answers
  • A car starts with an initial speed of 12 m/s and accelerates at 3 m/s/s for 5 seconds
    15·1 answer
  • 8. Fig. 4.1 shows a heavy ball B of weight W suspended from a fixed beam by two ropes P and Q.
    7·1 answer
  • Which processes result in the release of carbon? Select three options.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!