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Paladinen [302]
3 years ago
12

A golf ball is hit into the air, but NOT Staight Up, and encounters no significant air resistance. Which statement accurately de

scribes its motion while it is in air? On the way up, both its horizontal and vertical velocity components are decreasing, on the way down they are both increasing. Its acceleration is zero at the highest point. Its horizontal velocity doesn't change once it is in air, but its vertical velocity does change. On the way up its acceleration is 9.8m/s2 upward, on the way down its acceleration is 9.8m/s2 downward, Its velocity is zero at the highest point.
Physics
1 answer:
romanna [79]3 years ago
5 0

Answer:

Answered

Explanation:

A) False , horizontal velocity component is constant since there's no horizontal acceleration component

B) False, acceleration remains constant through out and only verticle acceleration is there horizontal acceleration is zero.

C) True , Its horizontal velocity doesn't change once it is in air, but its vertical velocity does change ( because of acceleration in verticle direction)

D)False, the acceleration is constant through the motion.

E)False, Vertical velocity is Zero but there will be Horizontal velocity.

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Which of these is an example of electrical energy being converted to mechanical energy?
GalinKa [24]

Answer:

Ceiling fan

Explanation:

Ceiling fan is a perfect and typical example of electrical energy being converted to mechanical energy.

In most systems, energy is usually transformed from one form to another. Energy is not created neither is it destroyed. We know this by virtue of law of conservation of energy.

  • The ceiling fan is powered by electrical energy from an outlet.
  • The energy from the outlet is used to drive the blades of the fan and set them into motion.
  • This is mechanical energy.
7 0
3 years ago
A light bulb dissipates 100 Watts of power when it is supplied a voltage of 220 volts.
ycow [4]

Given Information:

Power = P = 100 Watts

Voltage = V = 220 Volts

Required Information:

a) Current = I = ?

b) Resistance = R = ?

Answer:

a) Current = I = 0.4545 A

b) Resistance = R = 484 Ω

Explanation:

According to the Ohm’s law, the power dissipated in the light bulb is given by

P = VI

Where V is the voltage across the light bulb, I is the current flowing through the light bulb and P is the power dissipated in the light bulb.

Re-arranging the above equation for current I yields,

I = \frac{P}{V}  \\\\I = \frac{100}{220} \\\\I = 0.4545 \: A \\\\

Therefore, 0.4545 A current is flowing through the light bulb.

According to the Ohm’s law, the voltage across the light bulb is given by

V = IR

Where V is the voltage across the light bulb, I is the current flowing through the light bulb and R is the resistance of the light bulb.

Re-arranging the above equation for resistance R yields,

R = \frac{V}{I} \\\\R = \frac{220}{0.4545} \\\\R = 484 \: \Omega

Therefore, the resistance of the bulb is 484 Ω

3 0
3 years ago
Read 2 more answers
The specific heat of a certain type of metal is 0.128 J/(g⋅∘C).0.128 J/(g⋅∘C). What is the final temperature if 305 J305 J of he
Makovka662 [10]

Answer:

45.3°C

Explanation:

Heat gained = mass × specific heat × increase in temperature

q = mC (T − T₀)

Given C = 0.128 J/g/°C, m = 94.0 g, q = 305 J, and T₀ = 20.0°C:

305 J = (94.0 g) (0.128 J/g/°C) (T − 20.0°C)

T = 45.3°C

6 0
3 years ago
Please select the word from the list that best fits the definition
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The broadest level of organization would be the domain
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3 years ago
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Choose the letter of the best description of the nature of light:
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C. Light sometimes behaves like waves and at other times like particles.
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