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Molodets [167]
2 years ago
11

How much energy is created when there is 110 W of power over 30s?

Physics
1 answer:
Makovka662 [10]2 years ago
5 0

Answer:

3300 J

Explanation:
P = Q/t

Q = Pt = 110 * 30 = 3300 J

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When people exercise, they report feeling exhaustion when their body temp rises to 39.7 C a 68 kg man is running at 15 km/h on a
alexgriva [62]

Answer:

111 seconds

Explanation:

From research, it takes 4200 J to raise 1 kg of body temperature. Which means that specific heat capacity of human body with is; c = 4200 J/Kg°C

We are told that the temperature starts at 37°C and rises to 39.7°C

Thus: Δt = 39.7 - 37 = 2.7°C

Amount of energy required is given by the formula;

q = mcΔt

We are given m = 68 kg

Thus;

q = 68 × 4200 × 2.7

q = 77112 J

From research, the human body is 25% efficient.

Formula for power with velocity is;

P = F × V

F = mg = 68 × 9.81

V = 15km/h = 4.167 m/s

P = 68 × 9.81 × 4.167

P = 2779.72 W

Since the human body is 25%

Then the power of the utilized is;

25/100 × 2779.72 = 694.93 W

Now, we now that;

Power = work done/time taken

694.93 = 77112/t

t = 77112/694.93

t = 111 seconds.

Thus, it will take home 111 seconds to feel exhausted

4 0
3 years ago
The process of physically separating a single-phase mixture into components if the components have different boiling points is c
kobusy [5.1K]
This process of physically separating a single phase mixture into several components would be termed simple distillation, I believe.

As it is mentioned that one is separating them based on their different boiling points.
6 0
4 years ago
True or false
Kisachek [45]

Answer:

a) we should play inside our classroom

Explanation:

8 0
3 years ago
Read 2 more answers
If there is a negative sign in front of the Hooke's Law equation, what does the force, F, represent?
SashulF [63]

Answer:

Hooke's law, given by F=-kx is denoted with a negative sign to regard that the direction of restoring force that occurs opposite in direction of the force that caused the displacement x. F represents the force required to create a spring displacement of x.

Explanation:

As with many things in physics, the negative sign represents direction. In this case, after a spring is displaced a distance of x from equilibrium, the restoring force created by the spring will be in opposite direction of the force applied to move the spring there, represented by F.

6 0
3 years ago
An electric heater is rated at 1400 W, a toaster is rated at 1150 W, and an electric grill is rated at 1560 W. The three applian
gayaneshka [121]

Answer:

The current in the heater is 12.5 A

Explanation:

It is given that,

Power of electric heater, P₁ = 1400 W

Power of toaster, P₂ = 1150 W

Power of electric grill, P₃ = 1560 W

All three appliances are connected in parallel across a 112 V emf source. We need to find the current in the heater. We know that in parallel combination of resistors the current flowing in every branch of resistor divides while the voltage is same.

Electric power, P_1=V\times I_1

I_1=\dfrac{P_1}{V}

I_1=\dfrac{1400\ W}{112\ V}

I_1=12.5\ A

So, the current in the heater is 12.5 A. Hence, this is the required solution.  

8 0
4 years ago
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