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frez [133]
2 years ago
12

A projectile is launched with an initial velocity of 60.0 m/s at an angle of 30.0° above the horizontal. How far does it travel?

Physics
2 answers:
Bezzdna [24]2 years ago
8 0

Answer:

Explanation: The initial velocity has two component v x  and v y. The initial velocity in direction of y is given.

igomit [66]2 years ago
3 0

Answer:

D

Explanation:

The range is how far the projectile can go;

R = U^2sin2A/g

Where U is the initial velocity

A is the angle of inclination

=60^2sin2(30)/10 = 3600 sin60 / 10

= 311.8m

The exact answer should 312m

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Small cubes that are 10 cm on a side and larger ones that are 12 cm on a side are submerged in water. Cubes A and B are made of
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Answer

given,

given,

small cube side = 10 cm

larger cube side = 12 cm

density of steel = 7 g/cm³

density of aluminium = 2.7 g/cm³

density of the water (ρ₁)= 1 g/cm³

Cube A and B made of steel

buoyant force of Cube A

 B₁ = ρ₁ V g = 1 x 10 x 10 x 10 x g=  1000 g

for cube B

 B₂ = ρ₁ V g = 1 x 12 x 12 x 12 x g=  1728 g

buoyant force of Cube C

 B₃ = ρ₁ V g = 1 x 10 x 10 x 10 x g=  1000 g

for cube D

 B₄ = ρ₁ V g = 1 x 12 x 12 x 12 x g=  1728 g

buoyant force acting on the cube depends on the density of the fluid

hence,

B₂ = B₄  > B₁ = B₃

 

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3 years ago
Plzz Help worth 10 points!!! which statement about energy transformations is not true?
EleoNora [17]
I think it could be A
6 0
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What kind of friction exists between solid objects moving in water?
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A heating coil inside an electric kettle delivers 2.2 kW of electrical power to the water in the kettle. How long will it take t
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Answer:

0.04s

Explanation:

Specific heat of water c = 4.186J/g.C

The heat energy it would take to heat up 0.5 kg of water from 30C to 72 C is

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If the power of the electric kettle is 2.2kW (or 2200W) and suppose the work efficiency is 100%, then the time it takes to transfer that power is

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8 0
2 years ago
Check all that apply. An ammeter is used to measure current. An ammeter must be placed in parallel with a resistor to measure th
Juliette [100K]

<u>Out of all given choices, the following statements are true:</u>

  • An ammeter is used to measure current.
  • A voltmeter is used to measure voltage.
  • A voltmeter must be placed in parallel with a resistor to measure the voltage across the resistor.

Options A, E, and F

<u>Explanation:</u>

An instrument by which the current in a circuit is measured is  called ammeter whereas an instrument in which voltage is measured in a circuit is called a voltmeter . The ammeter is placed in series with the resistor while the voltmeter is placed in parallel with the resistor.

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