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3 years ago

8

Eric throws a basketball straight up into the air. As it rises, which form of energy is increasing? A. elastic potential energy

B. electrical energy C. gravitational potential energy D. kinetic energy

2 answers:

Art [367]3 years ago

7 0

I think it's kinetic energy

exis [7]3 years ago

5 0

Answer:

C) Gravitational potential energy

Explanation:

As ball is thrown upwards then we can say that speed of the ball will decrease as it will move upwards.

This is due to gravity which act opposite to the motion of the ball

So as the ball is thrown upwards the initial kinetic energy of the ball will start decreasing as it will move upwards

Here we also know that gravitational potential energy of the ball is given as

$U = mgh$

so as the ball start rising upwards the potential energy of the ball will increase

so here correct answer will be

C) Gravitational potential energy

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An electron with a charge of -1.6 × 10-19 coulombs experiences a field of 1.4 × 105 newtons/coulomb. What is the magnitude of th

kipiarov [429]

Answer:

$2.24 \times 10^{-14}$ Newtons

Explanation:

Magnitude of charge on the electron = q = $1.6 \times 10^{-19}$ Coulombs

The negative sign in the question statement indicates that the charge is negative.

Magnitude of Electric Field experienced by the electron = E = $1.4 \times 10^{5}$ Newtons/Coulomb

Magnitude of Force on the electron = F = ?

The relation between the charge, electric field and the force on the charge because of electric field is given by:

$E=\frac{F}{q}$

From here we can write:

F = qE

Using the values, we get:

$F = 1.6 \times 10^{-19} \times 1.4 \times 10^{5}\\\\ F = 2.24 \times 10^{-14}$

Thus, the magnitude of the electric force experience by the electron would be $2.24 \times 10^{-14}$ Newtons

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3 years ago

Please select the word from the list that best fits the definition site of sea-floor spreading

serious [3.7K]

<h3><u>Answer;</u></h3>

Mid-ocean ridges

<h3><u>Explanation</u>;</h3>

Sea-floor spreading is the process by which molten material adds new oceanic crust to the ocean floor.
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3 years ago

Order the sequence of ideas that led to Marie Curie’s discovery of radioactive elements. Number the events in chronological orde

Marysya12 [62]

Answer:

2 1 3

Explanation:

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3 years ago

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A

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Answer:

The mass of the wheel is 2159.045 kg

Explanation:

Given:

Radius $r = 0.330$

m

Force $F = 290$ N

Angular acceleration $\alpha = 0.814 \frac{rad}{s^{2} }$

From the formula of torque,

Γ $= I\alpha$ (1)

Γ $= rF$ (2)

$rF = I \alpha$

Find momentum of inertia $I$ from above equation,

$I = \frac{rF}{\alpha }$

$I = \frac{0.330 \times 290}{0.814}$

$I = 117.56$ $Kg. m^{2}$

Find the momentum inertia of disk,

$I = \frac{1}{2} Mr^{2}$

$M = \frac{2I}{r^{2} }$

$M = \frac{2 \times 117.56}{(0.330)^{2} }$

$M = 2159.045$ Kg

Therefore, the mass of the wheel is 2159.045 kg

8 0

3 years ago

What is the scientific method

MissTica

Answer:

Step 7- Communicate. Present/share your results. Replicate.

Step 1- Question.

Step 2-Research.

Step 3-Hypothesis.

Step 4-Experiment.

Step 5-Observations.

Step 6-Results/Conclusion

Explanation:

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3 years ago

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