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3 years ago

7

I REALLY NEED HELP WITH THIS: The ball has a mass of 2 kg and a final speed of 5 m/s. What is the kinetic energy of the ball? Gi

ve your answer in joules (J). Recall that the equation for finding kinetic energy is "Kinetic Energy = 1/2 x mass x speed²"

1 answer:

Andru [333]3 years ago

8 0

Answer:

ehehdjdjdjejdjd

Explanation:

jjejsjejejejejejeje

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What is the effect on this???

Setler79 [48]

It being transmitted

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3 years ago

Which types of reactions would result in a change in temperature?

Law Incorporation [45]

Answer:

Chemical reaction involves the breaking of bonds in the reactants and formation of bonds in the products. ... If a reaction is exothermic, more energy is released when the bonds of the products are formed than it takes to break the bonds of the reactants. This is the reason for temperature change during a reaction.

Explanation:

Here are just a few everyday demonstrations that temperature changes the rate of chemical reaction: Cookies bake faster at higher temperatures. Bread dough rises more quickly in a warm place than in a cool one.

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3 years ago

9. A box is pushed 1.5 m to the right in 5 s. What is the box’s average speed to the nearest hundredth of a m/s? *

poizon [28]

Answer:

s = 0.30 m/s

Explanation:

Given data:

Distance travel = 1.5 m

Time taken = 5 s

Average speed of box = ?

Solution:

s = d/t

s = speed

d = distance

t = time

by putting values,

s = 1.5 m/ 5 s

s = 0.30 m/s

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2 years ago

The heat of fusion for water is 80. cal/g. How many calories of heat are needed to melt a 35 g ice cube that has a temperature o

HACTEHA [7]

Answer: 2800 calories

Explanation:

Latent heat of fusion is the amount of heat required to convert 1 mole of solid to liquid at atmospheric pressure.

Amount of heat required to fuse 1 gram of water = 80 cal

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Heat required to fuse 1 g of ice at $0^0C$ = 80 cal

Thus Heat required to fuse 35 g of ice = $\frac{80}{1}\times 35=2800cal$

Thus 2800 calories of energy is required to melt 35 g ice cube

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3 years ago

When you rub two sticks together, they get hot.

worty [1.4K]

You convert kinetic energy into thermal energy when you rub two sticks together.

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2 years ago