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LenKa [72]
3 years ago
13

A snail and an inchworm are in a race. Their race track heads north for a distance of 2 m. If the inchworm comes to the end of t

he race in 50 s, what was its average velocity?
Physics
1 answer:
olga2289 [7]3 years ago
7 0
Well the basic equation for velocity is v=d/t where d is distance and t is time. So v=2m/50s and the answer is v=0.04meter/second.
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If no friction acts on a diver during a dive, then which of the following statements is true? A) The total mechanical energy of
EleoNora [17]
If no frictional work is considered, then the energy of the system (the driver at all positions is conserved.

Let
position 1 = initial height of the diver (h₁), together with the initial velocity (v₁).
position 2 = final height of the diver (h₂) and the final velocity (v₂).

The initial PE = mgh₁ and the initial KE  = (1/2)mv₁²
where g = acceleration due to gravity,
m = mass of the diver.
Similarly, the final PE and KE are respectively mgh₂ and (1/2)mv₂².
PE in position 1 is converted into KE due to the loss in height from position 1 to position 2.
 
Therefore
(KE + PE) ₁ = (KE + PE)₂

Evaluate the given answers.
A) The total mechanical energy of the system increases.
     FALSE

B) Potential energy can be converted into kinetic energy but not vice versa.
     TRUE

C) (KE + PE)beginning = (KE + PE) end.
     TRUE

D) All of the above.
     FALSE

4 0
3 years ago
Read 2 more answers
What does an unconformity in a sequence of rock layers reveal about geologic history?
dedylja [7]
Your answer will be “ b “
8 0
3 years ago
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If an object is dropped from a tall building and hits the ground 3.0 s. later, what is the magnitude of the object's displacemen
marin [14]

Find the velocity of the object after one second.  

v = vo + at  

v = (0 m/s) + (9.8 m/s^2)(1 s)  

v = 9.8 m/s  

Now, using that, you can find the displacement in that one second between 1 and 2.  

d = vot + (1/2)at^2  

d = (9.8 m/s)(1 s) + (1/2)(9.8 m/s^2)(1 s)^2  

d = 14.7 m  


5 0
3 years ago
Read 2 more answers
The carpenter question plz ASAP
k0ka [10]

Answer:

d. The hammer falls with a constant acceleration

Explanation:

Since gravity is the only thing that is acting on the hammer as it falls and gravity is a form of acceleration then acceleration of 9.81m/s² which is gravity is the correct answer.

6 0
3 years ago
0. A 5-kg block of ice is at a temperature of -27 °C. How much heat must be added to the ice to produce 5 kg of liquid water wit
stellarik [79]

Answer:

Q = 2687130 J

Explanation:

m = mass of block of ice = 5 kg

T_{i} = Initial temperature of ice block = - 27 °C

T_{f} = final temperature of water = 35 °C

c_{i} = specific heat of ice = 2108 J/(Kg °C)

L = Latent heat of fusion of ice = 334000 J/kg

c_{w} = specific heat of water = 4186 J/(Kg °C)

Heat added is given as

Q = m c_{i}(0 - T_{i})+ mL + m c_{w}(T_{f} - 0)

Q = (5) (2108)(0 - (-27))+ (5)(334000) + (5) (4186)(35 - 0)

Q = 2687130 J

8 0
3 years ago
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