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2 years ago

PLS SHOW WORK !!!!!!! ASAP

Physics

1 answer:

Lynna [10]2 years ago

4 0

Answer:

1- For the track B. The potential energy is the same for the two cars, but because of the slope of the track, the car B earn kinetic energy faster. The gravitation acceleration of the cars will be g•sinθ, and the angle of the track B will have a bigger value for sinθ

2- The conservation of energy applies because the roller coaster is a closed track. When a car climb the track, it earn GPE, which is given by mgh, when it get down in the track, it transform GPE in KE, which is given in 1/2mv².

Position of car (m) GPE KE GPE + KE

top (30m) 60000 0 60000

bottom (0m) 0 60000 60000

halfway down (15m) 30000 30000 60000

three-quarters way down 15000 45000 60000

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How popsicles are made?

crimeas [40]

It is made<span> by freezing flavored liquid (such as fruit juice) around a stick, generally resembling a tongue depressor. Often, the juice is colored artificially. Once the liquid freezes solid, the stick can be used as a handle to hold the ice pop</span>

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3 years ago

A bus driver drove from Philadelphia to Washington DC. He drove the first 100km in 2 hours, the next 55km in 1 hour, and the fin

Alla [95]

Answer:

b. 46 km/hr

Explanation:

Applying,

S' = d'/t'................... Equation 1

Where S' = Average speed of the bus, d' = Total distance covered by the bus, t' = Total time taken.

From the question,

d' = (100+55+75) km = 230 km

t' = (2+1+2) = 5 hours

Substitute these values into equation 1

S' = 230/5

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Hence the correct option is b. 46 km/hr

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3 years ago

Describe how the amount of voltage applied to a circuit affects current flow. A) Current and voltage of a circuit are indirectly

Nookie1986 [14]

Increasing the voltage will increase the current proportionately. (C)

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3 years ago

Read 2 more answers

Restaurant owners agree to comply with state, but not federal, health

Charra [1.4K]

Answer:

False.

Explanation:

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This ultimately implies that, all restaurant owners must have met the minimum requirements (criteria) and agree to comply with all the standards, rules and regulations with respect to public health before they are endorsed and then given a license to practice or operate by the appropriate agency or authorities.

Hence, restaurant owners agree to comply with state, federal, and health regulations when applying for a public health license.

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3 years ago

The primary coil of a transformer contains100 turns; the secondary has 200 turns. The primary coil isconnected to a size-AA batt

Norma-Jean [14]

Answer:

There will be no voltage across secondary coil because DC voltage source is used in primary coil so there is no electromotive force induced in secondary coil.

Explanation:

In this question we have given

AA battery is used to supplies a constant voltage of 1.5 volts to primary coil of transformer. In this case, voltage source is DC source which is providing constant voltage and for a transformer to work it is necessary to use an AC source.

Therefore, no EMF will induce in the secondary coil

and we know that in a transformer,

$\frac{E_{2} }{E_{1}} =\frac{V_{2} }{V_{1} }=\frac{N_{2} }{N_{1} }$ ...........(1)