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2 years ago

How much kinetic energy does a moving object have if it’s mass is 100 kg and it is moving at a speed of 5 meters per second

Physics

1 answer:

yKpoI14uk [10]2 years ago

6 0

We will have the following:

$k=\frac{1}{2}(100\operatorname{kg})(5m/s)^2\Rightarrow k=1250J$

So, the object has 1250 Joules of kinetic energy.

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Tabitha hit a 0.25 kg volleyball straight up into the air with 45 Joules of energy. How high did volleyball soar up? Round to th

zavuch27 [327]

Answer:

18 m

Explanation:

E = mgh

45 J = (0.25 kg) (9.8 m/s²) h

h = 18 m

7 0

4 years ago

At 96Â° F the saturation density of air is 0.04 kg/m3. If the weather report says the relative humidity is 90 % when the tempera

nalin [4]

Answer:

The value is $H = 0.036 \ kg/m^3$

Explanation:

From the question we are told that

The saturation density of air is $\rho = 0.04 \ kg/m^3$

The temperature for this saturation density to occur $T_s = 96^o F$

The relative humidity at this temperature is $R_h = 90\% = 0.90$

Generally the relative humidity is mathematically represented as

$R_H = \frac{H}{\rho}$

Here H represents humidity

=> $0.90 = \frac{H}{0.04}$

=> $H = 0.90 * 0.04$

=> $H = 0.036 \ kg/m^3$

8 0

3 years ago

In a car lift, compressed air exerts a force on a piston with a radius of 2.62 cm. This pressure is transmitted to a second pist

marin [14]

Answer:

847.45 N

Explanation:

F₁=force of exerted by smaller piston

F₂=force of exerted by larger piston=1.44×10⁴ N

A₁=Area of smaller piston= 2.62 cm =0.0265 m

A₂=Area of larger piston= 10.8 cm =0.108 m

Pressure exerted by both the pistons will be equal

$P_1=P_2\\\Rightarrow \frac{F_1}{A_1}=\frac{F_2}{A_2}\\\Rightarrow F_1=\frac{F_2}{A_2} A_1\\\Rightarrow F_1=\frac{14400}{\pi\times 0.108^2}\pi\times 0.0262^2\\\Rightarrow F_1=847.45\ N$

Hence, force exerted to lift a 14400 N car is 847.45 N

8 0

4 years ago

A 50 kg aardvark runs with a speed of 6 m/s. what is the kinetic energy of the aardvark

jeyben [28]

Answer:

900 J

Explanation:

0.5 x 50= 25 x 6^2= 900 J

5 0

4 years ago

A diet rich in high-density lipoproteins (HDLs) can help cleanse and open arteries that are clogged with plaque.

docker41 [41]

Correct answer choice is :

A) True

Explanation:

Lipoproteins are essentially a hub full of fat and cholesterol, along with a lipid layer that includes proteins named apolipoproteins. There are many kinds of lipoproteins, but the two most prominent ones are called Low-Density Lipoprotein and HDL.LDL particles are seldom related to as bad lipoprotein because of concentrations, dose-related, associated with atherosclerosis change. High-density lipoproteins (HDL) get fat molecules from the body's cells and take it back to the liver.

6 0

3 years ago

Read 2 more answers