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2 years ago

Can an object reverse its direction of travel while maintaining a constant acceleration?

1 answer:

7 0

Yes, think of a negative acceleration and an initial positive speed, the object slows down until it stops, and then the speed becomes negative, so it reverses the direction!

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1. What causes velocity to change?

tresset_1 [31]

The amount of force an object has will change the velocity

4 0

3 years ago

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The velocity of a car changes from 20 m/s east to 5 m/s east in 5 seconds. What is the acceleration of the car?

Klio2033 [76]

$acceleration = \frac{ v_{2}- v_{1} }{t} = \frac{5-20}{5} =-3m/s^{2}$

3 0

3 years ago

Which question can be used to identify a physical property of an element?

BabaBlast [244]

Answer:C

Explanation:

Do bubbles form when the element is mixed with an acid

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2 years ago

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Two metal plates 15mm apart have a potential difference of 750v between them. The force on a small charged sphere placed between

Romashka [77]

Answer:

50,000 V/m

Explanation:

The electric field between two charged metal plates is uniform.

The relationship between potential difference and electric field strength for a uniform field is given by the equation

$\Delta V=Ed$

where

$\Delta V$ is the potential difference

E is the magnitude of the electric field

d is the distance between the plates

In this problem, we have:

$\Delta V=750 V$ is the potential difference between the plates

d = 15 mm = 0.015 m is the distance between the plates

Therefore, rearranging the equation we find the strength of the electric field:

$E=\frac{\Delta V}{d}=\frac{750}{0.015}=50,000 V/m$

6 0

3 years ago

In the presence of ________, hydrogen peroxide will decompose into oxygen and water.

IrinaK [193]

Answer: Catalase enzyme

Explanation:

The catalase is an enzyme that is commonly found in the living organisms that are exposed to minute or high amount of oxygen or those in which aerobic respiration takes place.

This enzyme catalyzes the breakdown or decomposition of the hydrogen peroxide into oxygen and water. In humans and animals the catalase is present in liver, where it conducts the function of detoxifying the body by decomposing the toxins.

7 0

3 years ago