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2 years ago

12

If it takes the watermelon 1 second to reach the ground when it is thrown downward at 10 m/s, how tall are the stands?

1 answer:

Mnenie [13.5K]2 years ago

3 0

10 meters tall bc the melon fell in one second at 10m/s so one second means it fell 10 meters

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if an object is moving at a constant speed in a changing direction, What is the acceleration of the object (zero or not zero)

Andreas93 [3]

We know, acceleration is the change of velocity by time.
Velocity is the speed of an object which also indicates the direction.
Hence, acceleration is both dependant upon the speed as well as the direction.
So, if an object is moving at a constant speed in a changing direction, the acceleration will also change. It will not be zero.
An example is that of uniform circular motion.

Answer:

if an object is moving at a constant speed in a changing direction, the acceleration of the object will not be zero.

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2 years ago

A 34.0 %-efficient electric power plant produces 800 MW of electric power and discharges waste heat into 20∘C ocean water. Suppo

mojhsa [17]

Answer:

77647

Explanation:

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$P=\dfrac{800}{\eta}\\\Rightarrow P=\dfrac{800}{0.34}\\\Rightarrow P=2352.94117\ MW$

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$2352.94117-800=1552.94117\ W$

Number of homes would be given by

$n=\dfrac{1552.94117}{0.02}=77647.0585\ homes$

The number of homes that could be heated with the waste heat of this one power plant is 77647

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2 years ago

A box is being pushed but two stellar science students, one on each side of the box. Peter is pushing box with a force of 10 N t

Vitek1552 [10]

Answer:

Josh is the strongest

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2 years ago

Why do nations should establish a set of rules and principles for responsible lunar/moon explortions? ASAP pleaseeee :(

Marianna [84]

So that we do not contaminate it with microorganisms or garbage or other human stuff.

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2 years ago

An object whose weight is 10kg is placed on smooth plane inclined at 30° to the horizontal. find the acceleration of the object

velikii [3]

Answer:

4.9 m/s²

Explanation:

Draw a free body diagram. There are two forces on the object:

Weight force mg pulling straight down,

and normal force N pushing perpendicular to the plane.

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∑F = ma

mg sin θ = ma

a = g sin θ

a = (9.8 m/s²) (sin 30°)

a = 4.9 m/s²

8 0

2 years ago