Santa is checking his list and lifting his 23 kg bag of toys up and down. If he lifts it 0.5 meters, how much work does he do each time? (Use g = 10 m/s^2)
0 J
230 J
115 J
11.5 J
Santa uses radio waves to communicate with elves. If he switches to microwaves, how does the frequency change?
Increases
decreases
stays the same
7
Santa accidentally dropped a bag of presents in the ocean. If the bag has a mass of 10 kg and a volume of 0.008 m³, will it sink or float in water? (Assume the density of water is 1000 kg/m 3 1000 kg/m^3 )
Float
Sink
Dissapear
Santa isn't real
How does Santa measure the volume of his sack of presents?
By multiplying the length x width x height
He guesses based on how heavy it feels
With a magical measuring tape
With measuring cylinders filled with hot chocolate
If an elf blows up a balloon and it expands to a radius of 50 cm and exerts a pressure of 1.5 Pa on its surface, what is the force exerted by the air inside? Assume the balloon is a sphere with area 4*pi*r^2
3.1 N
1.2 N
4.7 N
9.4 N
Santa needs to calculate how efficient his new toy-making machine is. If it uses 1000 J of electrical energy and produces 600 J of useful toy energy, what is its efficiency?
40%
100%
60%
16.7 %
If the elves throw snowballs with a kinetic energy of 16 Joules and a mass of 0.5 kg, what is the speed of the snowballs?
5. 66 m/s
16 J
8 m/s
32 m/s
Rudolph's nose shines so bright, it can be seen reflecting off a frozen lake. If the angle of incidence of Rudolph’s nose light is 30 degrees, what is the angle of reflection in the ice?
30 degrees
smaller than 30 degrees
Rudolph doesn't have a nose
larger than 30 degrees
Santa’s sleigh weighs 2000 kg and is being pulled by 8 reindeer. Each reindeer exerts a force of 200 N. The sleigh experiences air resistance of 150N. What is the acceleration of the sleigh?
1.38 m/s^2
40 m/s^2
1.25 m/s^2
0.03 m/s^2
Santa's sleigh bells reflect sound around the North Pole. If an elf stands 600 meters away from Santa and hears the bell 1.76 second later, what is the speed of sound in the North Pole air?
3*10^8 m/s
340 m/s
600 m/s
1002 m/s
What force helps Santa not slide off a steep, icy roof?
Magnetic North Pole attraction
The grip of his white-gloved hands
The friction between his boots and the ice
Gravity, pulling him down the chimney
Rudolph ran around the North Pole non-stop. If he used a digital timer that started at 5:00 pm and ended at 5:30 pm, how long did he run in seconds?
99 999 9999 999s
1800 s
2 200 s
1200 s
If Santa's sleigh is delivering presents and moving with constant speed, what is the net force acting on it?
The pull of the reindeers
Zero, because the sleigh is not accelerating
The force of Christmas spirit
Equal to the weight of the presents
Santa’s workshop has a power outage and the only light comes from Rudolph’s nose, which emits 8000 Joules of light energy in 2 hours. What is the power of Rudolph's nose?
4000 Watt
8000 watt
1.1 Watt
2.2 Watt
If a reindeer pushes a sleigh with a force of 15 N for 3 minutes, how much work is done if the sleigh doesn't move?
0 J
2700 J
5 J
45 J
If Santa accelerates when leaving a rooftop, what does his velocity-time graph look like?
A wavy line like tinsel
A series of jumps for each chimney
A flat line, like the North Pole
A steep slope upwards
On Christmas Eve, Santa consumes 15 cookies which gives him 250 Calories of energy (1 Calorie = 4184 J) each. If santa weighs 100 kg and he needs to climb 5 m for each chimney, how many chimneys can he climb with the energy from 15 cookies?
209 Chimneys
3138 Chimneys
0.75 Chimneys
31 380 Chimneys
How much power does Rudolph exert if he pulls Santa’s sleigh, doing 500 J of work over a distance of 5 meter in 10 seconds?
2500 J
50 J
100 J
5 000 J
Mrs. Claus baked cookies and placed them in a straight line, 5 cm apart. If there are 20 cookies, what is the total distance from the first to the last cookie?
105 cm
95 cm
20 cm
100 cm