If you know the distance an object has traveled in a certain amount of time you can determine

Answers

Answer 1
Answer: With that information, you can determine the object's speed.
Just divide the distance covered by the time to cover the distance.

If you also know the direction the object moved, then you can
determine its velocity.  If you don't, then you can't.
Answer 2
Answer: You can determine the velocity it is moving at. 


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What is a hypothesis

Does our atmosphere get bigger?

Answers

Yes it does. I read about it in my school book.

Manuel releases a pendulum bob. The drawing shows its path. At which point does the pendulum bob have the most gravitational potential energy? a. no differences
b. point D
c. point B
d. point C

Answers

The right answer for the question that is being asked and shown above is that: "c. point B." Manuel releases a pendulum bob. The drawing shows its path. At point B that the pendulum bob have the most gravitational potential energy.

This image shows the direction of the flow of water through a constricted pipe. Which of the following happens as you move from position A to position B in the water pipe? A.The velocity of the water decreases.
B.The pressure of the water decreases.
C.The flow rate of the water decreases.
D.The density of the water increases.

Answers

The flow rate of the water decreases as the cross section is decreases. So, the correct option is C.

What is Bernoulli's equation?

Bernoulli’s principle states that the total mechanical energy of a moving fluid, which includes the gravitational potential energy of height, the energy associated with fluid pressure, and the kinetic energy of fluid motion, remains constant.

The formula for Bernoulli’s principle is given as follows:

p+(1)/(2) pv^2+ pgh= constant

From the equation of continuity for incompressible fluids which is Bernoulli's equation

a v = constant

where, a is the area and v is the velocity.

Pressure is inversely proportional to the velocity.

a_Av_A= a_Bv_B

From the image we can see that area of cross-section at A is greater than at B,

a_A > a_B

thus,

v_A < v_B

which means velocity of water will increase at B and water pressure will decrease.

Hence, the correct option is C, i.e. the flow rate of water decreases.

Learn more about Bernoulli's equation, here:

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C. The flow rate of the water decreases

What happens when the temperature of a substance is slightly decreased?

Answers

Answer: kinetic energy will reduce

Explanation: kinetic energy is a function of temperature the higher the temperature the more the kinetic energy of the molecules in the substance

The lower the temperature the lower the kinetic energy

If the temperature decreases, the molecules within the substance will move slowly and if the temperature is extremely decreased the substance will freeze.

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A snail crawls 300 cm in 1 hour. Calculate the snail's speed in each of the following units. A) cm/h B) cm/min C) m/h

Answers

A) 300cm/h
B)1 hr=60 min
300/60=5
5cm/min
C)1m=100cm
300/100=3
3m/h

A photon with a wavelength of 2.29 × 10^–7 meter strikes a mercury atom in the ground state.Determine the energy, in electronvolts, of this photon.

Answers

energy, in electron volts, of this photon will be 5.43 eV