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3 years ago

Acceleration has magnitude as well as direction. TRUE or FALSE

Physics

2 answers:

valina [46]3 years ago

7 0

Answer:

True

Explanation:

Acceleration is a vector and thus has magnitude and direction.

Kazeer [188]3 years ago

6 0

The answer is found to be true

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1. The sun radiates light from space to heat a swimming pool on Earth.

scoundrel [369]

Answer:

c. Light energy to thermal energy

Explanation:

The energy from the sun comes in the form of light energy but is converted to thermal energy.

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2 years ago

Explain why blocks with the same mass do not have the same density.

Pani-rosa [81]

Answer:

Density is equal to m/v where m is mass and v is volume. Even though the blocks have the same mass, they may have different volumes and therefore they will not have the same density.

Explanation:

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4 years ago

A baseball of mass 1.23 kg is thrown at a speed of 65.8 mi/h. What is its kinetic energy?

frosja888 [35]

Given:

The mass of the ball is

$m=1.23\text{ kg}$

The speed of the ball is

$\begin{gathered} v=65.8\text{ mi/h} \\ \end{gathered}$

Required: calculate the kinetic energy of the baseball

Explanation: to calculate the kinetic energy of a body we will use the formula as

$K.E=\frac{1}{2}mv^2$

first, we convert velocity from mi/h into m/s.

we know that

$1\text{ mi=1609.34 m}$

and

$1\text{ h=3600 sec}$

then the velocity is

$\begin{gathered} v=\frac{65.8\times1602.34\text{ m}}{3600\text{ s}} \\ v=29.29\text{ m/s} \end{gathered}$

now plugging all the values in the above formula, we get

$\begin{gathered} K.E=\frac{1}{2}mv^2 \\ K.E=\frac{1}{2}\times1.23\text{ kg}\times(29.29\text{ m/s})^2 \\ K.E=527.61\text{ J} \end{gathered}$

Thus, the kinetic energy of the baseball is

$527.61\text{ J}$

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2 years ago

Which of the following statements best describes the method of energy conservation known as cogeneration?

Mazyrski [523]

Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

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3 years ago

Give an example of how the relationship between force and acceleration might affect YOU.

IrinaK [193]

Take a car collision as an example, the more you speed up as means of acceleration, the more force will be on impact.

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3 years ago