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4 years ago

A 0.15 kg baseball falls to the ground with an acceleration of 9.8 m/s2. What is the weight of the baseball?

Physics

1 answer:

bagirrra123 [75]4 years ago

8 0

Answer:

1.47 N

Explanation:

Weight: Weight can be defined as the gravitational pull on a body. The S.I unit of weight is Newton (W).

Weight is a vector quantity and as such it can be expressed in both magnitude and direction

The formula of weight is given as,

W = mg ..................... Equation 1

Where W = weight of the base ball, m = mass of the base ball, g = acceleration due to gravity of the base ball.

Given: m = 0.15 kg, g = 9.8 m/s².

Substitute into equation 1

W = 0.15(9.8)

W = 1.47 N

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Resistors labeled 100 Ω have true resistances that are between 80 Ω and 120 Ω. Let X be the mass of a randomly chosen resistor.

STatiana [176]

Answer:

See explanation for step by step explanations.

Explanation:

Let X be the mass of a randomly selected resistor

The probability density function is given as

, 80<x<120

=0, otherwise

a) By using the given pdf we have to find the probability of the resistors having resistance less than 90

=0.0625

the probability of the resistors having resistance less than 90 is 0.0625

Step 2 of 4<

/p>

b) we have to find the mean resistance

Mean=

=106.67

The mean resistance is 106.67

5 0

4 years ago

A projectile is launched at an angle 60° to the horizontal

Katena32 [7]

Explanation:

We have,

A projectile is launched at an angle 60° to the horizontal with some initial speed 45 m/s.

The cliff is 265 m high.

(A) The final velocity of the projectile is given by :

$v_f^2-v_i^2=2gs\\\\v_f^2=2gs+v_i^2\\\\v_f^2=2\times 9.8\times 265+45^2\\\\v_f=84.96\ m/s$

(B) The maximum height of the projectile is given by :

$H=\dfrac{v_i^2\sin^2\theta}{2g}\\\\H=\dfrac{45^2\times \sin^2(60)}{2\times 9.8}\\\\H=77.48\ m$

$R=\dfrac{v_i^2\sin 2\theta}{g}\\\\R=\dfrac{(45)^2\times \sin 2(60)}{9.8}\\\\R=178.94\ m$

7 0

4 years ago

According to the dichotomous key, stentor would be a member of the kingdom

dalvyx [7]

D) Protista

<u>Explanation:</u>

The Dichotomous key is a organized set of couplets of mutual characteristics of biological organisms. This key begins with general characteristics and leads couplets indicating specific characteristics.
Dichotomous key is a key that allow the user to identify type of items in natural world. Stentor is one of the largest protozoa found in water.
Stentor is a single cell. An organism can be of 2 mm in length making them visible to human eye and it is even larger than many multi celled organisms. Stentor is eukaryote means it has nuclear membrane. It is commonly found in fresh water ponds.