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Luda [366]
4 years ago
7

Please help physics question

Physics
1 answer:
LenaWriter [7]4 years ago
5 0
Wavelength = v/f
f= 4.385x10 to the 14th power Hz
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Gretchen runs the first 4.0 km of a race at 5.0 m/s. Then a stiff wind comes up, so she runs the last 1.0 km at only 4.0 m/s.
KIM [24]

Answer:

The velocity is v = 4.76 \ m/s

Explanation:

From the question we are told that

   The first distance is   d_1  =  4.0 \ km  =  4000 \ m

   The  first speed  is  v_1 =  5.0 \ m/s

    The  second distance is  d_2  =  1.0 \ km  =  1000 \ m

    The  second speed  is  v_2  =  4.0 \ m/s

Generally the time taken for first distance is  

      t_1 =  \frac{d_1 }{v_1 }

        t_1 =  \frac{4000}{5}

       t_1 =  800 \ s

The time taken for second  distance is

           t_1 =  \frac{d_2 }{v_2 }

        t_1 =  \frac{1000}{4}

       t_1 =  250 \ s

The total time is mathematically represented as

     t =  t_1 + t_2

=>   t =  800 + 250

=>    t =  1050 \ s

Generally the constant velocity that would let her finish at the same time is mathematically represented as

      v =  \frac{d_1 + d_2}{t }

=>    v =  \frac{4000 + 1000}{1050 }

=>    v = 4.76 \ m/s

7 0
4 years ago
What is the Force in Newtons exerted by brick with a mass of 0.5 kg and an Acceleration of 52m/s2?
Sliva [168]
F= a*m
F= 0.5 kg * 52m/s^2
F=26kgm/s^2 or 26N

7 0
3 years ago
T/F is the following statement true or false? a person with antisocial personality disorder typically must be older than the age
sukhopar [10]

A person with antisocial personality disorder typically must be older than the age of 18 years and have shown some evidence of a conduct disorder. This is true statement.

<h3>What is antisocial personality disorder?</h3>

All 10 personality disorders are categorized into three clusters by the Diagnostic and Statistical Manual of Mental Disorders (DSM 5) (A, B, and C). One of the four cluster-B disorders, which also includes borderline, narcissistic, and histrionic disorders, is antisocial personality disorder.

Dramatic, emotional, and erratic relationships with people are common symptoms of all of these diseases. The only personality condition that cannot be diagnosed in childhood is antisocial personality disorder. To meet the diagnostic criteria for ASPD before the age of 18, the patient must have previously received a conduct disorder (CD) diagnosis by the time he or she became 15 years old.

Learn more about antisocial personality disorder here:

brainly.com/question/4031840

#SPJ1

3 0
1 year ago
At a certain instant after jumping from the airplane A, a skydiver B is in the position shown and has reached a terminal (consta
Lubov Fominskaja [6]

Answer:

a=2330

b= 0.223secs

Explanation:

pb=2330m

t=0.223secs

6 0
3 years ago
If a lithium atom loses one electron, what will its charge be?
vodka [1.7K]
If a lithium atom loses one electron, its charge will be +1
6 0
3 years ago
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