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3 years ago

how may kilojoules of heat are required to melt a 10.0g popsicle at 0 degrees C?(assume the same properties as water)

2 answers:

7 0

<span>there are different machines that help measure the distance of a property for construction workers to determine where to put a foundation </span>

Nikolay [14]3 years ago

3 0

The heat of fusion for water is 334j/g
therefore 1g of ice would require 334 x 10 j of energy which is 3.34kJ

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An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid C and 581 km from the center of asteroid

serg [7]

Answer:B

Explanation:

Given

Distance of astronaut From asteroid x is $r_x=140 km$

Distance of astronaut From asteroid Y is $r_y=581 km$

Suppose M,M_x,M_y be the masses of Astronaut , asteroid X and Y

If the astronaut is in equilibrium then net gravitational force on it is zero

$F_x=F_y$

$\frac{GMM_x}{r_x^2}=\frac{GMM_y}{r_y^2}$

cancel out the common terms we get

$\frac{M_x}{r_x^2}=\frac{M_y}{r_y^2}$

$\frac{M_x}{M_y}=(\frac{r_x}{r_y})^2$

$\frac{M_x}{M_y}=(\frac{140}{581})^2$

$\frac{M_x}{M_y}=0.05806\approx 0.0581$

8 0

3 years ago

If you added 5 x more mass into a wheelbarrow, how much greater would

aev [14]

Answer:

5 x biger

Explanation:

becuze if it ia 5× more it nids 5×more force to be =

7 0

2 years ago

A 0.155 kg arrow is shot upward

solniwko [45]

Answer:

2.43J

Explanation:

Given parameters:

Mass of the arrow = 0.155kg

Velocity = 31.4m /s

Unknown:

Kinetic energy when it leaves the bow = ?

Solution:

The kinetic energy of a body is the energy in motion of the body;

it can be derived using the expression below:

K.E = $\frac{1}{2}$ m v²

m is the mass

v is the velocity

Solve for K.E;

K.E = $\frac{1}{2}$ x 0.155 x 31.4 = 2.43J

3 0

2 years ago

Read 2 more answers

Under what circumstances does distance traveled equal magnitude of displacement? What is the only case in which magnitude of dis

Sedaia [141]

Answer: Please find the answer in the explanation

Explanation:

Under what circumstances does distance traveled equal magnitude of displacement?

When a body's motion is linear in one direction. Or a body moving in a straight line without turning back.

What is the only case in which magnitude of displacement and distance are exactly the same?

When the body is moving in a straight line with without changing direction or without turning back.

6 0

2 years ago

What happens to a circuit's resistance (R), voltage (V), and current (1) when

Naya [18.7K]

Answer:

Explanation:

Hope this helps

4 0

2 years ago

Read 2 more answers